Parent Company Information - Schedule of Condensed Statements of Financial Condition (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Assets
Interest bearing deposits with banks	$ 607,135	$ 503,622
Equity securities	64,464	48,731
Other assets	1,421,567	1,242,152
Total Assets	60,934,974	57,462,749
Liabilities and Shareholders’ Equity
Junior subordinated debentures issued to capital trusts	57,108	56,760
Shareholders’ equity	6,701,391	6,400,802	$ 5,084,066	$ 4,592,120
Total Liabilities and Shareholders’ Equity	60,934,974	57,462,749
Parent Company
Assets
Cash	193,248	145,647
Interest bearing deposits with banks	0	250
Equity securities	29,404	15,423
Investments in and receivables due from subsidiaries	7,290,923	7,160,571
Other assets	12,473	32,727
Total Assets	7,526,048	7,354,618
Liabilities and Shareholders’ Equity
Dividends payable to shareholders	60,918	58,754
Long-term borrowings	638,362	754,639
Junior subordinated debentures issued to capital trusts	57,108	56,760
Accrued expenses and other liabilities	68,269	83,663
Shareholders’ equity	6,701,391	6,400,802
Total Liabilities and Shareholders’ Equity	$ 7,526,048	$ 7,354,618