Accumulated Other Comprehensive Income, Reclassification of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax benefit	$ 961	$ 847	$ 2,875	$ 1,816
Reclassification adjustment, net of taxes	(16)	(5)	(29)	(6)
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	(16)	(5)	(29)	(6)
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 losses from sales of debt securities, available-for-sale	0	0	0	0
Income tax benefit	(4)	(2)	(8)	(2)
Reclassification adjustment, net of taxes	$ 4	$ 2	$ 8	$ 2