Other Comprehensive (Loss) Income - Summary of the Tax Effects (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive (loss) income, before tax	$ (1,990)	$ (684)	$ (6,512)	$ 2,743
Total other comprehensive (loss) income, tax effect	418	240	1,368	(960)
Unrealized gains and losses on securities available-for-sale:
Accumulated Other Comprehensive Income (Loss) [Line Items]
Change in unrealized gains/losses during period	(2,025)	(335)	(6,946)	3,224
Change in unrealized gains/losses during period, tax effect	425	118	1,459	(1,128)
Change in unrealized gains/losses during period, Net of tax	(1,600)	(217)	(5,487)	2,096
Reclassification adjustment for gains included in net income	0	(338)	0	(347)
Reclassification adjustment for gains included in net income, tax effect	0	119	0	121
Reclassification adjustment for gains included in net income, Net of tax	0	219	0	226
Gains on derivative instruments:
Accumulated Other Comprehensive Income (Loss) [Line Items]
Change in unrealized gains/losses during period	109	(7)	610	(130)
Change in unrealized gains/losses during period, tax effect	(23)	2	(128)	46
Change in unrealized gains/losses during period, Net of tax	86	(5)	482	(84)
Reclassification adjustment for gains included in net income	(74)	(4)	(176)	(4)
Reclassification adjustment for gains included in net income, tax effect	16	1	37	1
Reclassification adjustment for gains included in net income, Net of tax	58	3	139	3
Total other comprehensive (loss) income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total other comprehensive (loss) income, before tax	(1,990)	(684)	(6,512)	2,743
Total other comprehensive (loss) income, tax effect	418	240	1,368	(960)
Total other comprehensive (loss) income, Net of tax	$ (1,572)	$ (444)	$ (5,144)	$ 1,783