Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Amounts Reclassified from AOCI [Abstract]
Securities gains	$ 142	$ 14	$ 1,328	$ 574
Tax expense	3,238	2,504	7,325	4,807
Net income	17,447	15,269	43,678	48,532
Unrealized Gains on AFS Securities [Member] | Reclassification Out of Accumulated Other Comprehensive Income [Member]
Amounts Reclassified from AOCI [Abstract]
Securities gains	24	(2)	1,069	4
Tax expense	6	(1)	278	1
Net income	$ 18	$ (1)	$ 791	$ 3