Consolidated Statements of Change in Accumulated Other Comprehensive Income (Loss) - Schedule of Consolidated Statements of Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended							9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	$ 780,935	$ 762,667	$ 750,115	$ 735,866	$ 717,675	$ 668,749	$ 650,672	$ 750,115	$ 650,672
Cumulative-effect adjustment (ASU 2016-01)									(1,440)
Other comprehensive income (loss), net of tax	(709)	9,685	11,048	(1,661)	2,309	5,071	4,519	20,024	11,899
Ending balance	794,696	780,935	762,667	750,115	735,866	717,675	668,749	794,696	735,866
Unrealized Gains (Losses) on Cash Flow Hedges
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance			(366)	(379)			4,763	(366)	4,763
Other comprehensive income (loss), net of tax								46	(5,142)
Ending balance	(320)			(366)	(379)			(320)	(379)
Unrealized Gains (Losses) on Available-for-Sale Securities
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance			(334)	1,340			(14,261)	(334)	(14,261)
Cumulative-effect adjustment (ASU 2016-01)									(1,440)
Other comprehensive income (loss), net of tax								19,978	17,041
Ending balance	19,644			(334)	1,340			19,644	1,340
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	20,033	10,348	(700)	961	(1,348)	(6,419)	(9,498)	(700)	(9,498)
Cumulative-effect adjustment (ASU 2016-01)							(1,440)
Other comprehensive income (loss), net of tax	(709)	9,685	11,048	(1,661)	2,309	5,071	4,519
Ending balance	$ 19,324	$ 20,033	$ 10,348	$ (700)	$ 961	$ (1,348)	$ (6,419)	$ 19,324	$ 961