Investment Securities - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Marketable Securities [Line Items]
Security Owned and Pledged as Collateral Carrying Value	$ 580,900,000		$ 580,900,000		$ 564,400,000
Realized available-for-sale securities gains (losses)	0	$ 1,500,000	0	$ 2,000,000.0
Preferred and common stock held as investment securities	13,293,000		13,293,000		14,097,000
Unrealized loss on equity securities	(1,161,000)	$ (808,000)	(1,804,000)	$ 802,000
Preferred and Common Stock [Member]
Marketable Securities [Line Items]
Preferred and common stock held as investment securities	$ 13,300,000		$ 13,300,000		$ 14,100,000