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
	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	$ 750,115	$ 735,866	$ 717,675	$ 668,749	$ 650,672
Cumulative-effect adjustment (ASU 2016-01)					(1,440)
Other comprehensive income (loss), net of tax	11,048	(1,661)	2,309	5,071	4,519
Ending balance	762,667	750,115	735,866	717,675	668,749
Unrealized Gains (Losses) on Cash Flow Hedges
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(366)			2,943	4,763
Other comprehensive income (loss), net of tax	16				(1,820)
Ending balance	(350)	(366)			2,943
Unrealized Gains (Losses) on Available-for-Sale Securities
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(334)			(9,362)	(14,261)
Cumulative-effect adjustment (ASU 2016-01)					(1,440)
Other comprehensive income (loss), net of tax	11,032				6,339
Ending balance	10,698	(334)			(9,362)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(700)	961	(1,348)	(6,419)	(9,498)
Cumulative-effect adjustment (ASU 2016-01)					(1,440)
Other comprehensive income (loss), net of tax	11,048	(1,661)	2,309	5,071	4,519
Ending balance	$ 10,348	$ (700)	$ 961	$ (1,348)	$ (6,419)