Commitments and Contingencies - Amounts Related to Fair Value of Derivative Financial Instruments (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021	Jun. 30, 2021
Hedged item—subordinated debt and loans:
Derivative [Line Items]
Other Assets	$ 0	$ 0
Other Liabilities	577,282,000	50,922,000
Derivative—interest rate swaps:
Derivative [Line Items]
Notional Amount			$ 300,000,000
Derivatives designated as hedging instruments:
Derivative [Line Items]
Notional Amount	900,000,000	1,000,000,000
Derivatives not designated as hedging instruments:
Derivative [Line Items]
Notional Amount	16,058,364,000	10,613,888,000
Derivatives not designated as hedging instruments: | Derivative—interest rate swaps:
Derivative [Line Items]
Notional Amount	14,753,330,000	10,179,294,000
Derivatives not designated as hedging instruments: | Foreign currency derivatives
Derivative [Line Items]
Notional Amount	1,273,735,000	122,166,000
Derivatives not designated as hedging instruments: | Mortgage banking derivatives
Derivative [Line Items]
Notional Amount	31,299,000	312,428,000
Other Assets | Derivatives designated as hedging instruments:
Derivative [Line Items]
Other Assets	3,971,000	0
Other Assets | Derivatives not designated as hedging instruments:
Derivative [Line Items]
Other Assets	463,156,000	181,500,000
Other Assets | Derivatives not designated as hedging instruments: | Derivative—interest rate swaps:
Derivative [Line Items]
Other Assets	449,280,000	180,701,000
Other Assets | Derivatives not designated as hedging instruments: | Foreign currency derivatives
Derivative [Line Items]
Other Assets	13,709,000	311,000
Other Assets | Derivatives not designated as hedging instruments: | Mortgage banking derivatives
Derivative [Line Items]
Other Assets	167,000	488,000
Other Liabilities | Derivatives designated as hedging instruments:
Derivative [Line Items]
Other Liabilities	29,798,000	3,645,000
Other Liabilities | Derivatives not designated as hedging instruments:
Derivative [Line Items]
Other Liabilities	577,439,000	48,731,000
Other Liabilities | Derivatives not designated as hedging instruments: | Derivative—interest rate swaps:
Derivative [Line Items]
Other Liabilities	564,678,000	47,044,000
Other Liabilities | Derivatives not designated as hedging instruments: | Foreign currency derivatives
Derivative [Line Items]
Other Liabilities	12,604,000	233,000
Other Liabilities | Derivatives not designated as hedging instruments: | Mortgage banking derivatives
Derivative [Line Items]
Other Liabilities	157,000	1,454,000
Cash flow hedge interest rate swaps | Derivatives designated as hedging instruments: | Hedged item—subordinated debt and loans:
Derivative [Line Items]
Notional Amount	600,000,000	700,000,000
Cash flow hedge interest rate swaps | Derivatives designated as hedging instruments: | Derivative—interest rate swaps:
Derivative [Line Items]
Notional Amount	600,000,000
Cash flow hedge interest rate swaps | Other Assets | Derivatives designated as hedging instruments: | Hedged item—subordinated debt and loans:
Derivative [Line Items]
Other Assets	3,971,000	0
Cash flow hedge interest rate swaps | Other Liabilities | Derivatives designated as hedging instruments: | Hedged item—subordinated debt and loans:
Derivative [Line Items]
Other Liabilities	4,000	310,000
Fair value hedge interest rate swaps | Derivatives designated as hedging instruments: | Derivative—interest rate swaps:
Derivative [Line Items]
Notional Amount	300,000,000	300,000,000
Fair value hedge interest rate swaps | Derivatives not designated as hedging instruments: | Derivative—interest rate swaps:
Derivative [Line Items]
Notional Amount	10,400,000
Fair value hedge interest rate swaps | Other Assets | Derivatives designated as hedging instruments: | Derivative—interest rate swaps:
Derivative [Line Items]
Other Assets	0	0
Fair value hedge interest rate swaps | Other Liabilities | Derivatives designated as hedging instruments: | Derivative—interest rate swaps:
Derivative [Line Items]
Other Liabilities	$ 29,794,000	$ 3,335,000