Loans and Allowance for Credit Losses - Additional Information (Detail)	3 Months Ended		12 Months Ended
	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)
Financing Receivable, Allowance for Credit Losses [Line Items]
Proceeds from sales of loans held for sale	$ 9,493,000	$ 43,163,000
Nonaccrual Loans	110,356,000		$ 92,300,000
Restructured loans	7,100,000		7,300,000
Total Past Due	17,731,700,000		17,170,871,000
Non accrual loans with no related allowance for credit losses	100,989,000		85,948,000
Accrued interest on loans	$ 47,600,000		45,200,000
Number of reasonable and supportable forecast period	1 year
Commitments to lend to borrowers with loan modifications classified as TDR's	$ 0	$ 0
Number of Contracts	0	0
Default payment of troubled restructuring	$ 0	$ 0
Minimum [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of reasonable and supportable forecast period	1 year
Maximum [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Number of reasonable and supportable forecast period	3 years
Individually Evaluated Loans and Collateral Dependent Assets [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans associated allowance			1,000,000.0
Greater than 90 days Past Due and Accruing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Total Past Due	$ 3,600,000		$ 2,633,000
Factoring Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Sale of loan portfolio	82,600,000
Gain of sale of loan portfolio	2,400,000
Consumer Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Proceeds from sales of loans held for sale	$ 9,500,000	$ 43,200,000