Accumulated Other Comprehensive Income - Components of AOCI (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]
Beginning Balance	$ 828,792	$ 778,819	$ 819,018	$ 753,954
Other comprehensive income/(loss) before reclassifications	7,866	10,659	22,355	22,200
Reclassified from other comprehensive income/(loss)	107	(136)	107	(356)
Other comprehensive income/(loss), net	7,973	10,523	22,462	21,844
Ending Balance	825,205	798,211	825,205	798,211
Unrealized gain/(loss) on securities available-for-sale
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	22,924	(5,988)	8,435	(17,556)
Other comprehensive income/(loss) before reclassifications	8,198	10,665	22,687	22,233
Reclassified from other comprehensive income/(loss)	0	0	0	0
Other comprehensive income/(loss), net	8,198	10,665	22,687	22,233
Ending Balance	31,122	4,677	31,122	4,677
Unrealized gain/(loss) on cash flow hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	0	144	0	391
Other comprehensive income/(loss) before reclassifications	(302)	(6)	(302)	(33)
Reclassified from other comprehensive income/(loss)	107	(136)	107	(356)
Other comprehensive income/(loss), net	(195)	(142)	(195)	(389)
Ending Balance	(195)	2	(195)	2
Unrealized gain/(loss) on other
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(860)	(554)	(860)	(554)
Other comprehensive income/(loss) before reclassifications	(30)	0	(30)	0
Reclassified from other comprehensive income/(loss)	0	0	0	0
Other comprehensive income/(loss), net	(30)	0	(30)	0
Ending Balance	(890)	(554)	(890)	(554)
Accumulated other comprehensive income/(loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	22,064	(6,398)	7,575	(17,719)
Ending Balance	$ 30,037	$ 4,125	$ 30,037	$ 4,125