Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Consolidated Statements of Comprehensive Income (Unaudited) [Abstract]
Net Income	$ 14,105	$ 10,550	$ 27,654	$ 20,491
Other Comprehensive Income
Increase in Net Unrealized Gain (Loss) on Available-for-Sale Securities	3,741	(2,519)	7,987	(7,807)
Deferred Tax (Expense) Benefit Related to net Unrealized Gains (loss)	(1,105)	757	(2,361)	2,320
Reclassification Adjustment for Realized Losses (Gains) on Available-for-Sale Securities Included in Net Income	0	1,330	0	1,330
Deferred Tax (Expense) Benefit Related to Reclassification Adjustment	0	(405)	0	(405)
Total Other Comprehensive Income (Loss)	2,636	(837)	5,626	(4,562)
Comprehensive Income	$ 16,741	$ 9,713	$ 33,280	$ 15,929