Parent Company Balance Sheet (Details) - USD ($) $ in Thousands		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Assets:
Other Assets		$ 570,447	$ 512,712
Total assets		19,373,565	19,347,373
Liabilities and stockholders’ equity
Subordinated debentures (less unamortized debt issuance costs of $0 and $20)		0	49,980
Other liabilities		373,093	368,196
Total liabilities		16,380,445	16,452,122
Total stockholders’ equity		2,993,120	2,895,251	$ 2,886,701	$ 3,018,449
Liabilities and Equity		19,373,565	19,347,373
Parent Company [Member]
Assets:
Cash	[1]	110,097	108,788
Investments in subsidiaries	[2]	2,967,786	2,922,698
Prepaid income taxes		2,309	2,488
Deferred tax asset		430	429
Total assets		3,080,622	3,034,403
Liabilities and stockholders’ equity
Dividends payable		24,225	23,580
Junior subordinated debentures (less unamortized debt issuance costs of $28 and $30)		62,860	62,858
Subordinated debentures (less unamortized debt issuance costs of $0 and $20)		0	49,980
Other liabilities		417	2,734
Total liabilities		87,502	139,152
Total stockholders’ equity		2,993,120	2,895,251
Liabilities and Equity		3,080,622	3,034,403
Parent Company [Member] | Junior Subordinated Debt [Member]
Liabilities and stockholders’ equity
Unamortized Debt Issuance Expense		$ 28	30
Subordinated Debt [Member]
Liabilities and stockholders’ equity
Unamortized Debt Issuance Expense			20
Subordinated Debt [Member] | Parent Company [Member]
Liabilities and stockholders’ equity
Unamortized Debt Issuance Expense			$ 20

[1] Entire balance eliminates in consolidation.

[2] Majority of balance eliminates in consolidation