Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Consolidated Statements of Comprehensive Income [Abstract]
Net Income	$ 58,734	$ 56,036	$ 45,527
Other Comprehensive Loss
Net Unrealized Gain (Loss) on Available-for-Sale Securities	13,905	8,936	(4,343)
Deferred Tax (Benefit) Expense Related to Unrealized (Gain) Losses	(4,099)	(2,642)	1,284
Reclassification Adjustment for Realized (Gain) Loss on Sales of Available-for-Sale Securities Included in Net Income	(40)	(1)	1,260
Deferred Tax Related to Reclassification Adjustment	0	0	(372)
Total Other Comprehensive Income (Loss)	9,766	6,293	(2,171)
Comprehensive Income	$ 68,500	$ 62,329	$ 43,356