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Loans (Details 4) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Ending allowance balance attributable to loans:
Individually evaluated for impairment	$ 61	$ 61
Collectively evaluated for impairment	14,801	14,320
Acquired loans collectively evaluated for impairment	90	106
Total ending allowance balance	14,952	14,487	$ 13,777	$ 13,592
Loans:
Loans individually evaluated for impairment	4,383	4,253
Loans collectively evaluated for impairment	1,620,870	1,614,267
Acquired loans	350,284	192,329
Acquired with deteriorated credit quality	1,219,906	1,097,240
Loans	1,976,582	1,811,539
Receivables Acquired with Deteriorated Credit Quality
Ending allowance balance attributable to loans:
Acquired with deteriorated credit quality	0	0
Loans:
Acquired with deteriorated credit quality	1,045	690
Commercial real estate
Ending allowance balance attributable to loans:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	6,516	5,790
Acquired loans collectively evaluated for impairment	45	53
Total ending allowance balance	6,561	5,843	5,195	5,036
Loans:
Loans individually evaluated for impairment	549	561
Loans collectively evaluated for impairment	711,923	702,226
Acquired loans	175,770	86,431
Loans	888,828	789,413
Commercial real estate | Receivables Acquired with Deteriorated Credit Quality
Ending allowance balance attributable to loans:
Acquired with deteriorated credit quality	0	0
Loans:
Acquired with deteriorated credit quality	586	195
Commercial
Ending allowance balance attributable to loans:
Individually evaluated for impairment	2	2
Collectively evaluated for impairment	2,610	2,309
Acquired loans collectively evaluated for impairment	9	12
Total ending allowance balance	2,621	2,323	2,157	2,093
Loans:
Loans individually evaluated for impairment	211	205
Loans collectively evaluated for impairment	294,190	290,017
Acquired loans	36,218	17,110
Loans	331,078	307,827
Commercial | Receivables Acquired with Deteriorated Credit Quality
Ending allowance balance attributable to loans:
Acquired with deteriorated credit quality	0	0
Loans:
Acquired with deteriorated credit quality	459	495
Residential real estate
Ending allowance balance attributable to loans:
Individually evaluated for impairment	59	59
Collectively evaluated for impairment	2,818	2,777
Acquired loans collectively evaluated for impairment	34	39
Total ending allowance balance	2,911	2,875	2,813	2,837
Loans:
Loans individually evaluated for impairment	3,363	3,240
Loans collectively evaluated for impairment	406,688	413,446
Acquired loans	130,757	82,615
Loans	540,808	499,301
Residential real estate | Receivables Acquired with Deteriorated Credit Quality
Ending allowance balance attributable to loans:
Acquired with deteriorated credit quality	0	0
Loans:
Acquired with deteriorated credit quality	0	0
Consumer
Ending allowance balance attributable to loans:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	2,686	2,708
Acquired loans collectively evaluated for impairment	2	2
Total ending allowance balance	2,688	2,710	2,819	2,963
Loans:
Loans individually evaluated for impairment	260	247
Loans collectively evaluated for impairment	208,069	208,578
Acquired loans	7,539	6,173
Loans	215,868	214,998
Consumer | Receivables Acquired with Deteriorated Credit Quality
Ending allowance balance attributable to loans:
Acquired with deteriorated credit quality	0	0
Loans:
Acquired with deteriorated credit quality	0	0
Unallocated
Ending allowance balance attributable to loans:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	171	736
Acquired loans collectively evaluated for impairment	0	0
Total ending allowance balance	171	736	$ 793	$ 663
Loans:
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	0	0
Acquired loans	0	0
Loans	0	0
Unallocated | Receivables Acquired with Deteriorated Credit Quality
Ending allowance balance attributable to loans:
Acquired with deteriorated credit quality	0	0
Loans:
Acquired with deteriorated credit quality	$ 0	$ 0

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