Accumulated Other Comprehensive Income, Reclassification of AOCI (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]
Income tax benefit	$ 973	$ 486	$ 1,914	$ 969
Reclassification adjustment, net of taxes	1	(1)	(13)	(1)
Unrealized Gains and Losses on Available-for-Sale Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification adjustment, net of taxes	1	(1)	(13)	(1)
Unrealized Gains and Losses on Available-for-Sale Securities [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Realized gain (loss) from sales of debt securities, available-for-sale	1	(1)	(17)	(1)
Income tax benefit	0	0	(4)	0
Reclassification adjustment, net of taxes	$ 1	$ (1)	$ (13)	$ (1)