Other Comprehensive (Loss) Income - Summary of the Tax Effects (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive (loss) income, before tax	$ (784)	$ 2,600	$ (4,522)	$ 3,427
Total other comprehensive (loss) income, tax effect	165	(910)	950	(1,200)
Unrealized gains and losses on securities available-for-sale:
Accumulated Other Comprehensive Income (Loss) [Line Items]
Change in unrealized gains/losses during period	(873)	2,739	(4,922)	3,559
Change in unrealized gains/losses during period, tax effect	184	(959)	1,034	(1,246)
Change in unrealized gains/losses during period, Net of tax	(689)	1,780	(3,888)	2,313
Reclassification adjustment for gains included in net income	0	(3)	0	(9)
Reclassification adjustment for gains included in net income, tax effect	0	1	0	3
Reclassification adjustment for gains included in net income, Net of tax	0	(2)	0	(6)
Gains on derivative instruments:
Accumulated Other Comprehensive Income (Loss) [Line Items]
Change in unrealized gains/losses during period	152	(136)	502	(123)
Change in unrealized gains/losses during period, tax effect	(32)	48	(105)	43
Change in unrealized gains/losses during period, Net of tax	120	(88)	397	(80)
Reclassification adjustment for gains included in net income	(63)	0	(102)	0
Reclassification adjustment for gains included in net income, tax effect	13	0	21	0
Reclassification adjustment for gains included in net income, Net of tax	(50)	0	(81)	0
Total other comprehensive (loss) income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive (loss) income, before tax	(784)	2,600	(4,522)	3,427
Total other comprehensive (loss) income, tax effect	165	(910)	950	(1,200)
Total other comprehensive (loss) income, Net of tax	$ (619)	$ 1,690	$ (3,572)	$ 2,227