Accumulated Other Comprehensive Income - Schedule Of Amounts Reclassified Out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net securities gains (losses) reclassified into earnings			$ 670	$ (2,103)
Related income tax (expense) income	$ (5,640)	$ (4,732)	(10,627)	(12,054)
Net income available to common shareholders	22,148	18,251	41,962	47,249
Securities available-for-sale: | Amounts reclassified from Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net securities gains (losses) reclassified into earnings	29	(6)	312	56
Related income tax (expense) income	(7)	2	(75)	(12)
Net income available to common shareholders	$ 22	$ (4)	$ 237	$ 44