Basis of Presentation and Accounting Policies (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($) branch aTM	Mar. 31, 2022 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of branches | branch	245
Number of ATMs | aTM	363
Recognized tax credits	$ 10,800	$ 7,500
Amortization expense	10,200	8,000
Stockholders' equity	4,770,130	4,824,635	$ 4,475,801	$ 5,296,800
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity	$ 2,370,633	$ 1,821,542	2,234,770	$ 1,709,980
Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity			(297)
Cumulative Effect, Period of Adoption, Adjustment | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity			$ (297)