Derivative Financial Instruments - Schedule of the Notional Amount and Fair Value of the Derivative Financial Instruments (Details) - USD ($)	Jun. 30, 2025	Dec. 31, 2024
Interest Rate Swap Agreements:
Derivative [Line Items]
Notional Amount	$ 600,000,000	$ 300,000,000
Fair Value	1,300,000	4,700,000
Interest Rate Swap Agreements: | Derivatives designated as hedging instruments
Derivative [Line Items]
Notional Amount	2,200,000,000	2,000,000,000
Fair Value	(13,140,000)	2,738,000
Interest Rate Lock Commitments | Derivatives not designated as hedging instruments
Derivative [Line Items]
Notional Amount	1,341,000	1,534,000
Fair Value	37,000	34,000
Forward Commitments | Derivatives not designated as hedging instruments
Derivative [Line Items]
Notional Amount	3,082,000	3,517,000
Fair Value	(8,000)	6,000
Receive Fixed/Pay Variable Swaps | Derivatives not designated as hedging instruments
Derivative [Line Items]
Notional Amount	2,165,596,000	2,123,665,000
Fair Value	(82,906,000)	(136,218,000)
Pay Fixed/Receive Variable Swaps | Derivatives not designated as hedging instruments
Derivative [Line Items]
Notional Amount	2,165,596,000	2,123,665,000
Fair Value	82,802,000	136,125,000
Conversion Rate Swap Agreements
Derivative [Line Items]
Liability derivatives	0	0
Conversion Rate Swap Agreements | Derivatives not designated as hedging instruments
Derivative [Line Items]
Notional Amount	108,069,000	96,466,000
Makewhole Agreements
Derivative [Line Items]
Liability derivatives	0
Makewhole Agreements | Derivatives not designated as hedging instruments
Derivative [Line Items]
Notional Amount	$ 49,161,000	$ 65,763,000