Other Comprehensive Income (Loss) - Reclassification out of AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Gain on securities transactions	$ 2,025	$ 370	$ 2,612
Other non-interest expense	8,867	14,556	6,100
Total before tax	126,181	76,257	71,082
Income tax benefit	(34,132)	(18,654)	(16,365)
Net income	92,049	57,603	54,717
Accumulated Other Comprehensive Income (Loss) Components
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total before tax	(2,019)	(3,914)	(1,097)
Income tax benefit	702	819	178
Net income	(1,317)	(3,095)	(919)
Accumulated Other Comprehensive Income (Loss) Components | Reclassification adjustment for gain included in net income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Gain on securities transactions	2,025	370	2,612
Accumulated Other Comprehensive Income (Loss) Components | Reclassification adjustment of actuarial net (loss) included in net income
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other non-interest expense	$ (4,044)	$ (4,284)	$ (3,709)