Investment Securities - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Marketable Securities [Line Items]
Security Owned and Pledged as Collateral Carrying Value	$ 555,000,000.0		$ 564,400,000
Realized available-for-sale securities gains (losses)	0	$ 516,000,000
Preferred and common stock held as investment securities	13,454,000		14,097,000
Unrealized loss on equity securities	(643,000)	$ 1,610,000
Preferred and Common Stock [Member]
Marketable Securities [Line Items]
Preferred and common stock held as investment securities	$ 13,400,000		$ 14,100,000