Accumulated Other Comprehensive Income (Effects of Reclassifications Out of AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gain on securities transactions, net	$ 242	$ 238	$ 203	$ 224
Gain on securities transactions, net	242	238	203	224
Income tax expense	1,043	791	1,307	1,587
Total amount recognized	188	186	158	175
Unrealized Gain (Loss) on Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total amount recognized	188	186	158	175
Amount Reclassified from AOCI [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total amount recognized			(158)	(175)
Amount Reclassified from AOCI [Member] | Unrealized Gain (Loss) on Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gain on securities transactions, net	242	238	(203)	(224)
Income tax expense	54	52	$ 45	$ 49
Total amount recognized	$ (188)	$ (186)