Accumulated Other Comprehensive Income (Loss) - Reclassifications Out of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Jan. 01, 2019	Dec. 31, 2017
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Securities gains, net	$ 147	$ 289	$ 470	$ 410
Income taxes	405	(1,399)	(1,166)	(2,805)
Net income (loss)	(1,230)	5,980	4,773	11,792
Change in accounting for late charges					$ 0
Reclassifications	105		108	6
Realized gain on call of securities
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Change in accounting for late charges						$ (650)
Reclassifications	105		108	6
Amount Reclassified from AOCI
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Net income (loss)	105		108
Change in accounting for late charges						$ 650
Reclassifications				656
Amount Reclassified from AOCI | Realized gain on call of securities
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Securities gains, net	136	0	140	8
Income taxes	$ (31)	0	$ (32)	(2)
Net income (loss)		$ 0		$ 6