Variable Interest Entities - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Certified Development Entities
Variable Interest Entities
Tax credit period	7 years
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entities
Tax credit period	10 years
Tax credit compliance period	15 years
Impairment losses	$ 0	$ 0	$ 0
Other assets | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entities
Carrying value of equity investments in LIHTCs	$ 50,725,000	$ 45,953,000