Other Comprehensive Income (Loss) - Reclassifications (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gain on sale of securities, net	$ 202	$ 0	$ 575	$ 0
Tax expense	0	(237)	0	(271)
Interest expense	2,031	1,814	4,093	3,441
Net of tax	(2,903)	(669)	(8,733)	(308)
Unrealized gains and losses on securities available-for-sale: | Reclassifications Out of Accumulated Other Comprehensive Income (Loss)
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gain on sale of securities, net	202	0	575	0
Tax expense	0	0	0	0
Net of tax	202	0	575	0
Gains on derivative instruments: | Reclassifications Out of Accumulated Other Comprehensive Income (Loss)
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax expense	0	13	0	21
Interest expense	423	(63)	685	(102)
Net of tax	$ 423	$ (50)	$ 685	$ (81)