Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Amounts Reclassified from AOCI [Abstract]
Securities gains	$ (168)	$ 249
Tax expense	6,390	258
Net income	23,618	6,579
Unrealized Gains on AFS Securities [Member] | Reclassification Out of Accumulated Other Comprehensive Income [Member]
Amounts Reclassified from AOCI [Abstract]
Securities gains	60	481
Tax expense	16	125
Net income	$ 44	$ 356