Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	$ 307,711	$ 296,120	$ 304,913	$ 288,735
Net change in unrealized gain	2,900	(1,959)	(6,266)	(846)
Reclassification of net loss realized and included in earnings	(98)		(139)	458
Accumulated other comprehensive loss before income tax	(18,336)	(17,537)	(20,596)	(16,929)
Income tax provision (benefit)	754	(482)	(1,506)	126
Balance, end of period	318,102	295,140	318,102	295,140
Available-For-Sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(1,388)	(5,488)	(4,388)	(13,360)
Net change in unrealized gain	1,386	1,266	6,187	11,843
Reclassification of net loss realized and included in earnings	(98)		(139)	458
Accumulated other comprehensive loss before income tax	(100)	(4,222)	1,660	(1,059)
Income tax provision (benefit)	336	389	2,096	3,552
Balance, end of period	(436)	(4,611)	(436)	(4,611)
Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(19,750)	(10,090)	(9,803)	(3,181)
Net change in unrealized gain	1,514	(3,225)	(12,453)	(12,689)
Reclassification of net loss realized and included in earnings	0		0	0
Accumulated other comprehensive loss before income tax	(18,236)	(13,315)	(22,256)	(15,870)
Income tax provision (benefit)	418	(871)	(3,602)	(3,426)
Balance, end of period	(18,654)	(12,444)	(18,654)	(12,444)
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(21,138)	(15,578)	(14,191)	(16,541)
Balance, end of period	$ (19,090)	$ (17,055)	$ (19,090)	$ (17,055)