Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	$ 305,127	$ 294,013	$ 304,913	$ 288,735
Net change in unrealized gain	(2,007)	(2,225)	(9,166)	1,113
Reclassification of net loss realized and included in earnings		458	(41)	458
Accumulated other comprehensive loss before income tax	(21,873)	(15,935)	(23,398)	(14,970)
Income tax provision (benefit)	(735)	(357)	(2,260)	608
Balance, end of period	307,711	296,120	307,711	296,120
Available-For-Sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(239)	(8,380)	(4,388)	(13,360)
Net change in unrealized gain	(1,498)	3,667	4,801	10,577
Reclassification of net loss realized and included in earnings		458	(41)	458
Accumulated other comprehensive loss before income tax	(1,737)	(4,255)	372	(2,325)
Income tax provision (benefit)	(349)	1,233	1,760	3,163
Balance, end of period	(1,388)	(5,488)	(1,388)	(5,488)
Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(19,627)	(5,788)	(9,803)	(3,181)
Net change in unrealized gain	(509)	(5,892)	(13,967)	(9,464)
Reclassification of net loss realized and included in earnings		0	0	0
Accumulated other comprehensive loss before income tax	(20,136)	(11,680)	(23,770)	(12,645)
Income tax provision (benefit)	(386)	(1,590)	(4,020)	(2,555)
Balance, end of period	(19,750)	(10,090)	(19,750)	(10,090)
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance, beginning of period	(19,866)	(14,168)	(14,191)	(16,541)
Balance, end of period	$ (21,138)	$ (15,578)	$ (21,138)	$ (15,578)