Other Comprehensive Loss - Summary of the Tax Effects (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), before tax	$ 5,842	$ (3,739)
Total other comprehensive (loss) income, tax effect	0	785
Total other comprehensive income (loss), net of tax	5,842	(2,954)
Securities available-for-sale:
Accumulated Other Comprehensive Income (Loss) [Line Items]
Change in unrealized gains/losses during period, before tax	6,476	(4,048)
Change in unrealized gains/losses during period, tax effect	0	850
Change in unrealized gains/losses during period, net of tax	6,476	(3,198)
Reclassification adjustment for gains included in net income, before tax	(373)	0
Reclassification adjustment for gains included in net income, tax effect	0	0
Reclassification adjustment for gains included in net income, net of tax	(373)	0
Derivative instruments designated as cash flow hedges:
Accumulated Other Comprehensive Income (Loss) [Line Items]
Change in unrealized gains/losses during period, before tax	(261)	309
Change in unrealized gains/losses during period, tax effect	0	(65)
Change in unrealized gains/losses during period, net of tax	(261)	244
Total other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive income (loss), before tax	5,842	(3,739)
Total other comprehensive (loss) income, tax effect	0	785
Total other comprehensive income (loss), net of tax	$ 5,842	$ (2,954)