Regulatory Matters (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Parent Company [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Banking Regulation, Total Capital, Actual	$ 4,282,597	$ 3,997,205
Banking Regulation, Total Risk-Based Capital Ratio, Actual	12.61%	12.21%
Banking Regulation, Total Risk-Based Capital, Capital Adequacy, Minimum	$ 2,716,014	$ 2,618,596
Banking Regulation, Total Risk-Based Capital Ratio, Capital Adequacy, Minimum	8.00%	8.00%
Banking Regulation, Tier 1 Risk-Based Capital, Actual	$ 3,590,948	$ 3,269,050
Banking Regulation, Tier 1 Risk-Based Capital Ratio, Actual	10.58%	9.99%
Banking Regulation, Tier 1 Risk-Based Capital, Capital Adequacy, Minimum	$ 2,037,010	$ 1,963,947
Banking Regulation, Tier 1 Risk-Based Capital Ratio, Capital Adequacy, Minimum	6.00%	6.00%
Banking Regulation, Common Equity Tier 1 Risk-Based Capital, Actual	$ 3,396,836	$ 3,074,938
Banking Regulation, Common Equity Tier 1 Risk-Based Capital Ratio, Actual	10.01%	9.39%
Banking Regulation, Common Equity Tier 1 Risk-Based Capital, Capital Adequacy, Minimum	$ 1,527,758	$ 1,472,960
Banking Regulation, Common Equity Tier 1 Risk-Based Capital Ratio, Capital Adequacy, Minimum	4.50%	4.50%
Banking Regulation, Tier 1 Leverage Capital, Actual	$ 3,590,948	$ 3,269,050
Banking Regulation, Tier 1 Leverage Capital Ratio, Actual	8.73%	8.06%
Banking Regulation, Tier 1 Leverage Capital, Capital Adequacy, Minimum	$ 1,644,627	$ 1,622,053
Banking Regulation, Tier 1 Leverage Capital Ratio, Capital Adequacy, Minimum	4.00%	4.00%
Subsidiaries [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Banking Regulation, Total Capital, Actual	$ 4,078,042	$ 3,803,052
Banking Regulation, Total Risk-Based Capital Ratio, Actual	12.03%	11.64%
Banking Regulation, Total Risk-Based Capital, Capital Adequacy, Minimum	$ 2,710,815	$ 2,614,469
Banking Regulation, Total Risk-Based Capital Ratio, Capital Adequacy, Minimum	8.00%	8.00%
Banking Regulation, Total Risk-Based Capital, Well Capitalized, Minimum	$ 3,388,519	$ 3,268,086
Banking Regulation, Total Risk-Based Capital Ratio, Well Capitalized, Minimum	10.00%	10.00%
Banking Regulation, Tier 1 Risk-Based Capital, Actual	$ 3,425,721	$ 3,167,182
Banking Regulation, Tier 1 Risk-Based Capital Ratio, Actual	10.11%	9.69%
Banking Regulation, Tier 1 Risk-Based Capital, Capital Adequacy, Minimum	$ 2,033,111	$ 1,960,852
Banking Regulation, Tier 1 Risk-Based Capital Ratio, Capital Adequacy, Minimum	6.00%	6.00%
Banking Regulation, Tier 1 Risk-Based Capital, Well Capitalized, Minimum	$ 2,710,815	$ 2,614,469
Banking Regulation, Tier 1 Risk-Based Capital Ratio, Well Capitalized, Minimum	8.00%	8.00%
Banking Regulation, Common Equity Tier 1 Risk-Based Capital, Actual	$ 3,425,721	$ 3,167,182
Banking Regulation, Common Equity Tier 1 Risk-Based Capital Ratio, Actual	10.11%	9.69%
Banking Regulation, Common Equity Tier 1 Risk-Based Capital, Capital Adequacy, Minimum	$ 1,524,833	$ 1,470,639
Banking Regulation, Common Equity Tier 1 Risk-Based Capital Ratio, Capital Adequacy, Minimum	4.50%	4.50%
Banking Regulation, Common Equity Tier 1 Risk-Based Capital, Well Capitalized, Minimum	$ 2,202,537	$ 2,124,256
Banking Regulation, Common Equity Tier 1 Risk-Based Capital Ratio, Well Capitalized, Minimum	6.50%	6.50%
Banking Regulation, Tier 1 Leverage Capital, Actual	$ 3,425,721	$ 3,167,182
Banking Regulation, Tier 1 Leverage Capital Ratio, Actual	8.34%	7.82%
Banking Regulation, Tier 1 Leverage Capital, Capital Adequacy, Minimum	$ 1,642,484	$ 1,620,970
Banking Regulation, Tier 1 Leverage Capital Ratio, Capital Adequacy, Minimum	4.00%	4.00%
Banking Regulation, Tier 1 Leverage Capital, Well Capitalized, Minimum	$ 2,053,105	$ 2,026,212
Banking Regulation, Tier 1 Leverage Capital Ratio, Well Capitalized, Minimum	5.00%	5.00%