Other Comprehensive Income (Loss) (Classifications out of AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income Tax Expense	$ (2,748)	$ (2,484)
NET INCOME	15,067	11,813
Total Reclassifications	122	213
Unrealized Gains and Losses on Available-for-Sale Securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total Reclassifications	122	213
Amount Reclassified From Accumulated Other Comprehensive Income (Loss)
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total Reclassifications	122	213
Amount Reclassified From Accumulated Other Comprehensive Income (Loss) | Unrealized Gains and Losses on Available-for-Sale Securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net Gains on Securities	155	270
Income Tax Expense	(33)	(57)
NET INCOME	$ 122	$ 213