Derivatives and Hedging Activities - Notional Amounts and Estimated Fair Values of Derivatives (Details)	Dec. 31, 2021 USD ($)	Aug. 02, 2021 USD ($)	Jun. 17, 2021 USD ($)	Dec. 31, 2020 USD ($)	May 01, 2020 USD ($)
Derivative [Line Items]
Derivative Asset, Notional Amount	$ 1,691,200,000			$ 901,600,000
Derivative Assets, Estimated Fair Value	28,100,000			55,300,000
Derivative Liability, Notional Amount	1,103,900,000			1,014,100,000
Derivative Liabilities, Estimated Fair Value	18,200,000			17,900,000
Interest Rate Cash Flow Hedge Derivative at Fair Value, Net	0
Derivative Instruments and Hedges, Assets	695,600,000			0
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease)	(4,400,000)			0
Interest Rate Swap
Derivative [Line Items]
Derivative Liability, Notional Amount					$ 46,400,000
Derivative, Notional Amount, Contract 2					36,100,000
Derivative, Notional Amount, Contract 3					$ 5,100,000
Derivative, Fixed Interest Rate, Contract 1					0.0040
Derivative, Fixed Interest Rate, Contract 2					0.0034
Derivative, Fixed Interest Rate, Contract 3					0.0040
Derivative, Notional Amount		$ 200,000,000	$ 500,000,000
Derivative, Fixed Interest Rate		1.22%	1.19%
Not Designated as Hedging Instrument | Interest Rate Swap
Derivative [Line Items]
Derivative Asset, Notional Amount	913,900,000			799,700,000
Derivative Assets, Estimated Fair Value	22,200,000			52,000,000.0
Derivative Liability, Notional Amount	913,900,000			799,700,000
Derivative Liabilities, Estimated Fair Value	18,100,000			16,600,000
Not Designated as Hedging Instrument | Interest Rate Lock Commitments [Member]
Derivative [Line Items]
Derivative Asset, Notional Amount	77,300,000			101,900,000
Derivative Assets, Estimated Fair Value	1,800,000			3,300,000
Not Designated as Hedging Instrument | Forward Contracts [Member]
Derivative [Line Items]
Derivative Liability, Notional Amount	102,400,000			126,800,000
Derivative Liabilities, Estimated Fair Value	0			1,100,000
Designated as Hedging Instrument | Interest Rate Swap
Derivative [Line Items]
Derivative Asset, Notional Amount	700,000,000.0			0
Derivative Assets, Estimated Fair Value	4,100,000			0
Derivative Liability, Notional Amount	87,600,000			87,600,000
Derivative Liabilities, Estimated Fair Value	$ 100,000			$ 200,000