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Loans (Details 4) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Ending allowance balance attributable to loans:
Individually evaluated for impairment		$ 436
Collectively evaluated for impairment		21,526
Acquired loans collectively evaluated for impairment		182
Total ending allowance balance	$ 24,935	22,144	$ 14,952	$ 14,487
Loans:
Loans individually evaluated for impairment		6,613
Loans collectively evaluated for impairment		1,800,444
Acquired loans		270,070
Acquired with deteriorated credit quality	1,330,881	1,345,862
Loans	$ 2,037,404	2,078,044
Receivables Acquired with Deteriorated Credit Quality
Ending allowance balance attributable to loans:
Acquired with deteriorated credit quality		0
Loans:
Acquired with deteriorated credit quality		917
Commercial real estate
Ending allowance balance attributable to loans:
Individually evaluated for impairment		0
Collectively evaluated for impairment		10,400
Acquired loans collectively evaluated for impairment		97
Total ending allowance balance		10,497	6,561	5,843
Loans:
Loans individually evaluated for impairment		502
Loans collectively evaluated for impairment		758,050
Acquired loans		135,884
Loans		894,950
Commercial real estate | Receivables Acquired with Deteriorated Credit Quality
Ending allowance balance attributable to loans:
Acquired with deteriorated credit quality		0
Loans:
Acquired with deteriorated credit quality		514
Commercial
Ending allowance balance attributable to loans:
Individually evaluated for impairment		357
Collectively evaluated for impairment		4,546
Acquired loans collectively evaluated for impairment		17
Total ending allowance balance		4,920	2,621	2,323
Loans:
Loans individually evaluated for impairment		3,086
Loans collectively evaluated for impairment		424,379
Acquired loans		23,044
Loans		450,912
Commercial | Receivables Acquired with Deteriorated Credit Quality
Ending allowance balance attributable to loans:
Acquired with deteriorated credit quality		0
Loans:
Acquired with deteriorated credit quality		403
Residential real estate
Ending allowance balance attributable to loans:
Individually evaluated for impairment		79
Collectively evaluated for impairment		3,392
Acquired loans collectively evaluated for impairment		65
Total ending allowance balance		3,536	2,911	2,875
Loans:
Loans individually evaluated for impairment		2,836
Loans collectively evaluated for impairment		414,568
Acquired loans		105,936
Loans		523,340
Residential real estate | Receivables Acquired with Deteriorated Credit Quality
Ending allowance balance attributable to loans:
Acquired with deteriorated credit quality		0
Loans:
Acquired with deteriorated credit quality		0
Consumer
Ending allowance balance attributable to loans:
Individually evaluated for impairment		0
Collectively evaluated for impairment		2,520
Acquired loans collectively evaluated for impairment		3
Total ending allowance balance		2,523	2,688	2,710
Loans:
Loans individually evaluated for impairment		189
Loans collectively evaluated for impairment		203,447
Acquired loans		5,206
Loans		208,842
Consumer | Receivables Acquired with Deteriorated Credit Quality
Ending allowance balance attributable to loans:
Acquired with deteriorated credit quality		0
Loans:
Acquired with deteriorated credit quality		0
Unallocated
Ending allowance balance attributable to loans:
Individually evaluated for impairment		0
Collectively evaluated for impairment		668
Acquired loans collectively evaluated for impairment		0
Total ending allowance balance		668	$ 171	$ 736
Loans:
Loans individually evaluated for impairment		0
Loans collectively evaluated for impairment		0
Acquired loans		0
Loans		0
Unallocated | Receivables Acquired with Deteriorated Credit Quality
Ending allowance balance attributable to loans:
Acquired with deteriorated credit quality		0
Loans:
Acquired with deteriorated credit quality		$ 0

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