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LOANS, ALLOWANCE FOR LOAN LOSSES AND IMPAIRED LOANS - Originated and Acquired Loans by Type and Risk (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Mar. 31, 2020
Dec. 31, 2019
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans $ 1,201,262 $ 1,246,889 $ 1,189,425  
Unearned net deferred fees and costs and loans in process (4,487) (4,245)    
Unamortized discount on acquired loans (4,649) (5,063)    
Allowance for loan losses (16,860) (17,043) (11,835)  
Loans receivable, net 1,175,266 1,220,538    
1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 1,161,539 1,211,676    
6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 13,659 6,672    
7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 26,064 28,541    
8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
SBA PPP loans        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 118,931 123,702    
SBA PPP loans | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 118,931 123,702    
SBA PPP loans | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
SBA PPP loans | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
SBA PPP loans | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
SBA PPP loans | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Originated Loans        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 937,668 960,725 789,856  
Allowance for loan losses (15,028) (14,819) (10,850) $ (9,551)
Originated Loans | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 920,894 943,005    
Originated Loans | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 2,952 2,258    
Originated Loans | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 13,822 15,462    
Originated Loans | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Originated Loans | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Originated Loans | SBA PPP loans        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 118,931 123,702    
Originated Loans | SBA PPP loans | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 118,931 123,702    
Originated Loans | SBA PPP loans | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Originated Loans | SBA PPP loans | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Originated Loans | SBA PPP loans | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Originated Loans | SBA PPP loans | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Originated loans before SBA PPP loans        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 818,737 837,023    
Originated loans before SBA PPP loans | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 801,963 819,303    
Originated loans before SBA PPP loans | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 2,952 2,258    
Originated loans before SBA PPP loans | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 13,822 15,462    
Originated loans before SBA PPP loans | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Originated loans before SBA PPP loans | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Acquired Loans        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 263,594 286,164    
Allowance for loan losses (1,832)   (985)  
Acquired Loans | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 240,645 268,671    
Acquired Loans | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 10,707 4,414    
Acquired Loans | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 12,242 13,079    
Acquired Loans | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Acquired Loans | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Gross loans before SBA PPP Loans        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 1,082,331 1,123,187    
Gross loans before SBA PPP Loans | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 1,042,608 1,087,974    
Gross loans before SBA PPP Loans | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 13,659 6,672    
Gross loans before SBA PPP Loans | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 26,064 28,541    
Gross loans before SBA PPP Loans | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Gross loans before SBA PPP Loans | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Purchased credit impaired loans        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 17,441 17,946 31,231  
Allowance for loan losses 0   0  
Other acquired loans        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 246,153 268,218 368,338  
Allowance for loan losses (1,832) (2,224)   (769)
Commercial/agriculture real estate        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 795,476 797,139 802,469  
Allowance for loan losses (12,410)   (7,942)  
Commercial/agriculture real estate | Commercial real estate        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 515,189 507,675    
Commercial/agriculture real estate | Commercial real estate | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 498,817 497,785    
Commercial/agriculture real estate | Commercial real estate | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 11,258 4,817    
Commercial/agriculture real estate | Commercial real estate | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 5,114 5,073    
Commercial/agriculture real estate | Commercial real estate | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Commercial/agriculture real estate | Commercial real estate | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Commercial/agriculture real estate | Agricultural real estate        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 70,567 68,795    
Commercial/agriculture real estate | Agricultural real estate | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 63,480 61,188    
Commercial/agriculture real estate | Agricultural real estate | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 522 446    
Commercial/agriculture real estate | Agricultural real estate | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 6,565 7,161    
Commercial/agriculture real estate | Agricultural real estate | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Commercial/agriculture real estate | Agricultural real estate | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Commercial/agriculture real estate | Multi-family real estate        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 118,988 122,152    
Commercial/agriculture real estate | Multi-family real estate | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 118,684 121,696    
Commercial/agriculture real estate | Multi-family real estate | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 304 308    
Commercial/agriculture real estate | Multi-family real estate | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 148    
Commercial/agriculture real estate | Multi-family real estate | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Commercial/agriculture real estate | Multi-family real estate | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Commercial/agriculture real estate | Construction and land development        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 90,732 98,517    
Commercial/agriculture real estate | Construction and land development | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 87,011 95,000    
Commercial/agriculture real estate | Construction and land development | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 204 0    
Commercial/agriculture real estate | Construction and land development | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 3,517 3,517    
Commercial/agriculture real estate | Construction and land development | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Commercial/agriculture real estate | Construction and land development | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Commercial/agriculture real estate | Originated Loans        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 599,182 586,826 519,958  
Allowance for loan losses (11,109) (10,271) (7,277) (6,205)
Commercial/agriculture real estate | Originated Loans | Commercial real estate        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 365,603 351,113    
Commercial/agriculture real estate | Originated Loans | Commercial real estate | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 363,758 349,482    
Commercial/agriculture real estate | Originated Loans | Commercial real estate | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 764 543    
Commercial/agriculture real estate | Originated Loans | Commercial real estate | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 1,081 1,088    
Commercial/agriculture real estate | Originated Loans | Commercial real estate | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Commercial/agriculture real estate | Originated Loans | Commercial real estate | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Commercial/agriculture real estate | Originated Loans | Agricultural real estate        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 38,140 31,741    
Commercial/agriculture real estate | Originated Loans | Agricultural real estate | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 36,439 30,041    
Commercial/agriculture real estate | Originated Loans | Agricultural real estate | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 522 446    
Commercial/agriculture real estate | Originated Loans | Agricultural real estate | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 1,179 1,254    
Commercial/agriculture real estate | Originated Loans | Agricultural real estate | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Commercial/agriculture real estate | Originated Loans | Agricultural real estate | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Commercial/agriculture real estate | Originated Loans | Multi-family real estate        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 111,503 112,731    
Commercial/agriculture real estate | Originated Loans | Multi-family real estate | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 111,199 112,423    
Commercial/agriculture real estate | Originated Loans | Multi-family real estate | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 304 308    
Commercial/agriculture real estate | Originated Loans | Multi-family real estate | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Commercial/agriculture real estate | Originated Loans | Multi-family real estate | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Commercial/agriculture real estate | Originated Loans | Multi-family real estate | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Commercial/agriculture real estate | Originated Loans | Construction and land development        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 83,936 91,241    
Commercial/agriculture real estate | Originated Loans | Construction and land development | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 80,458 87,763    
Commercial/agriculture real estate | Originated Loans | Construction and land development | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Commercial/agriculture real estate | Originated Loans | Construction and land development | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 3,478 3,478    
Commercial/agriculture real estate | Originated Loans | Construction and land development | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Commercial/agriculture real estate | Originated Loans | Construction and land development | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Commercial/agriculture real estate | Acquired Loans        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Allowance for loan losses (1,301)   (665)  
Commercial/agriculture real estate | Acquired Loans | Commercial real estate        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 149,586 156,562    
Commercial/agriculture real estate | Acquired Loans | Commercial real estate | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 135,059 148,303    
Commercial/agriculture real estate | Acquired Loans | Commercial real estate | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 10,494 4,274    
Commercial/agriculture real estate | Acquired Loans | Commercial real estate | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 4,033 3,985    
Commercial/agriculture real estate | Acquired Loans | Commercial real estate | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Commercial/agriculture real estate | Acquired Loans | Commercial real estate | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Commercial/agriculture real estate | Acquired Loans | Agricultural real estate        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 32,427 37,054    
Commercial/agriculture real estate | Acquired Loans | Agricultural real estate | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 27,041 31,147    
Commercial/agriculture real estate | Acquired Loans | Agricultural real estate | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Commercial/agriculture real estate | Acquired Loans | Agricultural real estate | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 5,386 5,907    
Commercial/agriculture real estate | Acquired Loans | Agricultural real estate | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Commercial/agriculture real estate | Acquired Loans | Agricultural real estate | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Commercial/agriculture real estate | Acquired Loans | Multi-family real estate        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 7,485 9,421    
Commercial/agriculture real estate | Acquired Loans | Multi-family real estate | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 7,485 9,273    
Commercial/agriculture real estate | Acquired Loans | Multi-family real estate | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Commercial/agriculture real estate | Acquired Loans | Multi-family real estate | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 148    
Commercial/agriculture real estate | Acquired Loans | Multi-family real estate | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Commercial/agriculture real estate | Acquired Loans | Multi-family real estate | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Commercial/agriculture real estate | Acquired Loans | Construction and land development        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 6,796 7,276    
Commercial/agriculture real estate | Acquired Loans | Construction and land development | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 6,553 7,237    
Commercial/agriculture real estate | Acquired Loans | Construction and land development | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 204 0    
Commercial/agriculture real estate | Acquired Loans | Construction and land development | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 39 39    
Commercial/agriculture real estate | Acquired Loans | Construction and land development | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Commercial/agriculture real estate | Acquired Loans | Construction and land development | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Commercial/agriculture real estate | Purchased credit impaired loans        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 14,856 15,100 25,452  
Allowance for loan losses 0   0  
Commercial/agriculture real estate | Other acquired loans        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 181,438 195,213 257,059  
Allowance for loan losses (1,301) (1,684)   (526)
C&I/Agricultural operating        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 243,114 273,040 159,946  
Allowance for loan losses (1,727)   (1,819)  
C&I/Agricultural operating | Commercial and industrial        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 95,933 116,553    
C&I/Agricultural operating | Commercial and industrial | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 91,220 112,392    
C&I/Agricultural operating | Commercial and industrial | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 326 29    
C&I/Agricultural operating | Commercial and industrial | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 4,387 4,132    
C&I/Agricultural operating | Commercial and industrial | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
C&I/Agricultural operating | Commercial and industrial | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
C&I/Agricultural operating | Agricultural operating        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 28,250 32,785    
C&I/Agricultural operating | Agricultural operating | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 26,757 30,300    
C&I/Agricultural operating | Agricultural operating | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 1,045 934    
C&I/Agricultural operating | Agricultural operating | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 448 1,551    
C&I/Agricultural operating | Agricultural operating | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
C&I/Agricultural operating | Agricultural operating | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
C&I/Agricultural operating | SBA PPP loans        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 118,931 123,702    
C&I/Agricultural operating | Originated Loans        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 216,773 243,449 107,949  
Allowance for loan losses (1,633) (2,112) (1,659) (1,643)
C&I/Agricultural operating | Originated Loans | Commercial and industrial        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 76,693 95,290    
C&I/Agricultural operating | Originated Loans | Commercial and industrial | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 72,355 91,474    
C&I/Agricultural operating | Originated Loans | Commercial and industrial | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 317 20    
C&I/Agricultural operating | Originated Loans | Commercial and industrial | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 4,021 3,796    
C&I/Agricultural operating | Originated Loans | Commercial and industrial | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
C&I/Agricultural operating | Originated Loans | Commercial and industrial | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
C&I/Agricultural operating | Originated Loans | Agricultural operating        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 21,149 24,457    
C&I/Agricultural operating | Originated Loans | Agricultural operating | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 20,003 22,462    
C&I/Agricultural operating | Originated Loans | Agricultural operating | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 1,045 934    
C&I/Agricultural operating | Originated Loans | Agricultural operating | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 101 1,061    
C&I/Agricultural operating | Originated Loans | Agricultural operating | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
C&I/Agricultural operating | Originated Loans | Agricultural operating | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
C&I/Agricultural operating | Acquired Loans        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Allowance for loan losses (94)   (160)  
C&I/Agricultural operating | Acquired Loans | Commercial and industrial        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 19,240 21,263    
C&I/Agricultural operating | Acquired Loans | Commercial and industrial | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 18,865 20,918    
C&I/Agricultural operating | Acquired Loans | Commercial and industrial | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 9 9    
C&I/Agricultural operating | Acquired Loans | Commercial and industrial | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 366 336    
C&I/Agricultural operating | Acquired Loans | Commercial and industrial | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
C&I/Agricultural operating | Acquired Loans | Commercial and industrial | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
C&I/Agricultural operating | Acquired Loans | Agricultural operating        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 7,101 8,328    
C&I/Agricultural operating | Acquired Loans | Agricultural operating | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 6,754 7,838    
C&I/Agricultural operating | Acquired Loans | Agricultural operating | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
C&I/Agricultural operating | Acquired Loans | Agricultural operating | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 347 490    
C&I/Agricultural operating | Acquired Loans | Agricultural operating | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
C&I/Agricultural operating | Acquired Loans | Agricultural operating | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
C&I/Agricultural operating | Purchased credit impaired loans        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 1,367 1,534 3,845  
Allowance for loan losses 0   0  
C&I/Agricultural operating | Other acquired loans        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 24,974 28,057 48,152  
Allowance for loan losses (94) (141)   (27)
Residential mortgage        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 127,622 137,646 173,412  
Allowance for loan losses (1,329)   (1,039)  
Residential mortgage | Residential mortgage        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 122,331 131,386    
Residential mortgage | Residential mortgage | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 116,746 124,902    
Residential mortgage | Residential mortgage | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 138    
Residential mortgage | Residential mortgage | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 5,585 6,346    
Residential mortgage | Residential mortgage | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Residential mortgage | Residential mortgage | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Residential mortgage | Purchased HELOC loans        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 5,291 6,260    
Residential mortgage | Purchased HELOC loans | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 5,057 5,959    
Residential mortgage | Purchased HELOC loans | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Residential mortgage | Purchased HELOC loans | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 234 301    
Residential mortgage | Purchased HELOC loans | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Residential mortgage | Purchased HELOC loans | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Residential mortgage | Originated Loans        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 87,576 92,543 110,455  
Allowance for loan losses (941) (1,041) (924) (879)
Residential mortgage | Originated Loans | Residential mortgage        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 82,285 86,283    
Residential mortgage | Originated Loans | Residential mortgage | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 78,764 82,097    
Residential mortgage | Originated Loans | Residential mortgage | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 7    
Residential mortgage | Originated Loans | Residential mortgage | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 3,521 4,179    
Residential mortgage | Originated Loans | Residential mortgage | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Residential mortgage | Originated Loans | Residential mortgage | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Residential mortgage | Originated Loans | Purchased HELOC loans        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 5,291 6,260    
Residential mortgage | Originated Loans | Purchased HELOC loans | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 5,057 5,959    
Residential mortgage | Originated Loans | Purchased HELOC loans | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Residential mortgage | Originated Loans | Purchased HELOC loans | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 234 301    
Residential mortgage | Originated Loans | Purchased HELOC loans | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Residential mortgage | Originated Loans | Purchased HELOC loans | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Residential mortgage | Acquired Loans        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Allowance for loan losses (388)   (115)  
Residential mortgage | Acquired Loans | Residential mortgage        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 40,046 45,103    
Residential mortgage | Acquired Loans | Residential mortgage | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 37,982 42,805    
Residential mortgage | Acquired Loans | Residential mortgage | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 131    
Residential mortgage | Acquired Loans | Residential mortgage | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 2,064 2,167    
Residential mortgage | Acquired Loans | Residential mortgage | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Residential mortgage | Acquired Loans | Residential mortgage | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Residential mortgage | Purchased credit impaired loans        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 1,218 1,312 1,934  
Allowance for loan losses 0   0  
Residential mortgage | Other acquired loans        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 38,828 43,791 61,023  
Allowance for loan losses (388) (335)   (163)
Consumer installment        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 35,050 39,064 53,598  
Allowance for loan losses (499)   (575)  
Consumer installment | Originated indirect paper        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 23,186 25,851    
Consumer installment | Originated indirect paper | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 23,024 25,616    
Consumer installment | Originated indirect paper | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Consumer installment | Originated indirect paper | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 162 235    
Consumer installment | Originated indirect paper | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Consumer installment | Originated indirect paper | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Consumer installment | Other consumer        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 11,864 13,213    
Consumer installment | Other consumer | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 11,812 13,136    
Consumer installment | Other consumer | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Consumer installment | Other consumer | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 52 77    
Consumer installment | Other consumer | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Consumer installment | Other consumer | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Consumer installment | Originated Loans        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 34,137 37,907 51,494  
Allowance for loan losses (450) (489) (530) (467)
Consumer installment | Originated Loans | Originated indirect paper        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 23,186 25,851    
Consumer installment | Originated Loans | Originated indirect paper | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 23,024 25,616    
Consumer installment | Originated Loans | Originated indirect paper | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Consumer installment | Originated Loans | Originated indirect paper | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 162 235    
Consumer installment | Originated Loans | Originated indirect paper | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Consumer installment | Originated Loans | Originated indirect paper | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Consumer installment | Originated Loans | Other consumer        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 10,951 12,056    
Consumer installment | Originated Loans | Other consumer | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 10,906 11,986    
Consumer installment | Originated Loans | Other consumer | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Consumer installment | Originated Loans | Other consumer | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 45 70    
Consumer installment | Originated Loans | Other consumer | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Consumer installment | Originated Loans | Other consumer | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Consumer installment | Acquired Loans        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Allowance for loan losses (49)   (45)  
Consumer installment | Acquired Loans | Other consumer        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 913 1,157    
Consumer installment | Acquired Loans | Other consumer | 1 to 5        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 906 1,150    
Consumer installment | Acquired Loans | Other consumer | 6        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Consumer installment | Acquired Loans | Other consumer | 7        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 7 7    
Consumer installment | Acquired Loans | Other consumer | 8        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Consumer installment | Acquired Loans | Other consumer | 9        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0    
Consumer installment | Purchased credit impaired loans        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0 0  
Allowance for loan losses 0   0  
Consumer installment | Other acquired loans        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 913 1,157 2,104  
Allowance for loan losses (49) (64)   (53)
Unallocated        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0 0  
Allowance for loan losses (895)   (460)  
Unallocated | Originated Loans        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0 0  
Allowance for loan losses (895) (906) (460) (357)
Unallocated | Acquired Loans        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Allowance for loan losses 0   0  
Unallocated | Purchased credit impaired loans        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0 0  
Allowance for loan losses 0   0  
Unallocated | Other acquired loans        
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]        
Gross loans 0 0 $ 0  
Allowance for loan losses $ 0 $ 0   $ 0