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SECURITIES - Investments in a Continuous Unrealized Loss Position (Details)
$ in Thousands
Dec. 31, 2021
USD ($)
item
Dec. 31, 2020
USD ($)
Available-for-sale: Unrealized Loss    
Less than 12 Months $ (7,334) $ (1,061)
12 Months or More (1,654) (30)
Total Unrealized Loss of Available-for-sale securities (8,988) (1,091)
Held-to-maturity: Unrealized Loss    
Less than 12 Months (2,826) (18)
12 Months or More (128)  
Total Unrealized Loss of Held-to-maturity securities (2,954) (18)
Available-for-sale: Fair Value    
Less than 12 Months 445,604 107,933
12 Months or More 38,324 7,939
Total Fair Value Available-for-sale securities 483,928 115,872
Held-to-maturity: Fair value    
Less than 12 Months 194,309 2,983
12 Months or More 2,776  
Total Fair Value Held-to-maturity securities 197,085 2,983
Total: Unrealized Losses    
Less Than 12 Months (10,160) (1,079)
12 Months or More (1,782) (30)
Total Unrealized Losses (11,942) (1,109)
Total: Fair Value    
Less than 12 Months 639,913 110,916
12 Months or More 41,100 7,939
Total Fair Value $ 681,013 118,855
Number of securities in an unrealized loss position for a period of twelve months or more | item 37  
Number of securities in an unrealized loss position for a period of less than twelve months | item 235  
U.S. Treasury    
Available-for-sale: Unrealized Loss    
Less than 12 Months $ (354)  
Total Unrealized Loss of Available-for-sale securities (354)  
Held-to-maturity: Unrealized Loss    
Less than 12 Months (51)  
Total Unrealized Loss of Held-to-maturity securities (51)  
Available-for-sale: Fair Value    
Less than 12 Months 68,410  
Total Fair Value Available-for-sale securities 68,410  
Held-to-maturity: Fair value    
Less than 12 Months 4,949  
Total Fair Value Held-to-maturity securities 4,949  
U.S. government agency    
Available-for-sale: Unrealized Loss    
Less than 12 Months (2,183) (9)
12 Months or More (284)  
Total Unrealized Loss of Available-for-sale securities (2,467) (9)
Available-for-sale: Fair Value    
Less than 12 Months 80,219 5,919
12 Months or More 5,578  
Total Fair Value Available-for-sale securities 85,797 5,919
Municipal securities    
Available-for-sale: Unrealized Loss    
Less than 12 Months (2,018) (280)
12 Months or More (886)  
Total Unrealized Loss of Available-for-sale securities (2,904) (280)
Available-for-sale: Fair Value    
Less than 12 Months 89,424 19,652
12 Months or More 17,327  
Total Fair Value Available-for-sale securities 106,751 19,652
Mortgage-backed: Agency residential    
Available-for-sale: Unrealized Loss    
Less than 12 Months (851) (142)
12 Months or More (68) (20)
Total Unrealized Loss of Available-for-sale securities (919) (162)
Held-to-maturity: Unrealized Loss    
Less than 12 Months (102)  
Total Unrealized Loss of Held-to-maturity securities (102)  
Available-for-sale: Fair Value    
Less than 12 Months 91,703 20,387
12 Months or More 4,305 4,490
Total Fair Value Available-for-sale securities 96,008 24,877
Held-to-maturity: Fair value    
Less than 12 Months 14,932  
Total Fair Value Held-to-maturity securities 14,932  
Mortgage-backed: Agency commercial    
Available-for-sale: Unrealized Loss    
Less than 12 Months (1,921) (524)
12 Months or More (127) (10)
Total Unrealized Loss of Available-for-sale securities (2,048) (534)
Held-to-maturity: Unrealized Loss    
Less than 12 Months (2,673) (18)
12 Months or More (128)  
Total Unrealized Loss of Held-to-maturity securities (2,801) (18)
Available-for-sale: Fair Value    
Less than 12 Months 113,111 57,126
12 Months or More 6,443 3,449
Total Fair Value Available-for-sale securities 119,554 60,575
Held-to-maturity: Fair value    
Less than 12 Months 174,428 2,983
12 Months or More 2,776  
Total Fair Value Held-to-maturity securities 177,204 2,983
Corporate    
Available-for-sale: Unrealized Loss    
Less than 12 Months (7) (106)
12 Months or More (289)  
Total Unrealized Loss of Available-for-sale securities (296) (106)
Available-for-sale: Fair Value    
Less than 12 Months 2,737 4,849
12 Months or More 4,671  
Total Fair Value Available-for-sale securities $ 7,408 $ 4,849