Securities - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021	Dec. 31, 2013
Debt Securities, Available-for-sale [Line Items]
Available-for-sale securities transferred to held-to-maturity securities					$ 12,700,000	$ 536,000,000
Unrealized net loss on securities reclassified from available-for-sale to held-to-maturity, Gross					209,000	$ 13,300,000
Debt securities, available-for-sale, realized gain (loss)	$ (21,000)	$ 0	$ (108,000)	$ 0
Debt securities, held to maturity	1,068,034,000		1,068,034,000		1,139,193,000
Equity investments	75,269,000		75,269,000		101,155,000
Securities Sold under Agreements to Repurchase
Debt Securities, Available-for-sale [Line Items]
Debt securities, held to maturity	110,600,000		110,600,000		142,900,000
Federal Home Loan Bank Advances, Federal Reserve Discount Window And Other Borrowings
Debt Securities, Available-for-sale [Line Items]
Debt securities, held to maturity	941,900,000		941,900,000		$ 1,140,000,000
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Debt securities, amoritized cost	61,100,000		61,100,000
Debt securities, fair value	58,000,000		58,000,000
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Debt securities, amoritized cost	296,200,000		296,200,000
Debt securities, fair value	279,000,000		279,000,000
State, municipal and sovereign debt obligations
Debt Securities, Available-for-sale [Line Items]
Debt securities, amoritized cost	87,200,000		87,200,000
Debt securities, fair value	$ 83,400,000		$ 83,400,000