Accumulated Other Comprehensive Income - Components of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 868,008	$ 819,018
Other comprehensive income/(loss) before reclassifications	(17,987)	14,489
Reclassified from other comprehensive income/(loss)	44	0
Other comprehensive income/(loss), net	(17,943)	14,489
Ending Balance	858,423	828,792
Unrealized gain/(loss) on Investment securities available-for-sale
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	32,672	8,435
Other comprehensive income/(loss) before reclassifications	(17,993)	14,489
Reclassified from other comprehensive income/(loss)	0
Other comprehensive income/(loss), net	(17,993)	14,489
Ending Balance	14,679	22,924
Unrealized gain/(loss) on cash flow hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(162)	0
Other comprehensive income/(loss) before reclassifications	6	0
Reclassified from other comprehensive income/(loss)	44
Other comprehensive income/(loss), net	50	0
Ending Balance	(112)	0
Unrealized gain/(loss) on other
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(825)	(860)
Other comprehensive income/(loss) before reclassifications	0	0
Reclassified from other comprehensive income/(loss)	0
Other comprehensive income/(loss), net	0	0
Ending Balance	(825)	(860)
Accumulated other comprehensive income/(loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	31,685	7,575
Ending Balance	$ 13,742	$ 22,064