Loans and the Allowance for Credit Losses - Summary of Changes in Allowance for Credit Losses (Detail) - USD ($) $ in Thousands		12 Months Ended
	Jan. 01, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses - loans, beginning balance	$ 52,429	$ 185,827	$ 52,429	$ 48,948
Allowance for credit losses - loan commitments, beginning balance	874	9,514	874	741
Total beginning allowance for credit losses - loans and loan commitments	53,303	195,341	53,303	49,689
Provision for loan losses		62,477	101,960	11,065
Provision for loan commitments		1,739	5,685	133
Total provision for credit losses - loans and loan commitments		64,216	107,645	11,198
Charge-offs		(10,136)	(12,535)	(12,657)
Recoveries		8,408	5,486	5,073
Net recoveries (charge-offs)		(1,728)	(7,049)
Allowance for credit losses - loans, ending balance		121,622	185,827	52,429
Allowance for credit losses - loan commitments, ending balance		7,775	9,514	874
Total ending allowance for credit losses - loans and loan commitments		129,397	195,341	53,303
Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses - loans, beginning balance	14,116	37,850	14,116	12,114
Allowance for credit losses - loan commitments, beginning balance	311	1,275	311	262
Total beginning allowance for credit losses - loans and loan commitments	14,427	39,125	14,427	12,376
Provision for loan losses		10,749	3,918	2,714
Provision for loan commitments		222	693	49
Total provision for credit losses - loans and loan commitments		10,527	4,611	2,763
Charge-offs		(2,521)	(3,727)	(1,816)
Recoveries		2,295	1,457	1,104
Net recoveries (charge-offs)		(226)	(2,270)	(712)
Allowance for credit losses - loans, ending balance		26,875	37,850	14,116
Allowance for credit losses - loan commitments, ending balance		1,497	1,275	311
Total ending allowance for credit losses - loans and loan commitments		28,372	39,125	14,427
Deposit Overdraft [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses - loans, beginning balance	1,387	639	1,387	972
Total beginning allowance for credit losses - loans and loan commitments	1,387	639	1,387	972
Provision for loan losses		2,694	(376)	1,664
Total provision for credit losses - loans and loan commitments		2,694	(376)	1,664
Charge-offs		(1,486)	(1,011)	(1,659)
Recoveries		373	426	410
Net recoveries (charge-offs)		1,113	(585)	(1,249)
Allowance for credit losses - loans, ending balance		2,220	639	1,387
Total ending allowance for credit losses - loans and loan commitments		2,220	639	1,387
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Net recoveries (charge-offs)				(7,584)
Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses - loans, beginning balance	4,949	10,841	4,949	4,039
Allowance for credit losses - loan commitments, beginning balance	235	6,508	235	169
Total beginning allowance for credit losses - loans and loan commitments	5,184	17,349	5,184	4,208
Provision for loan losses		3,698	6,929	746
Provision for loan commitments		2,328	3,671	66
Total provision for credit losses - loans and loan commitments		6,026	10,600	812
Charge-offs		(22)	(51)	(107)
Recoveries		189	92	271
Net recoveries (charge-offs)		167	41	164
Allowance for credit losses - loans, ending balance		7,310	10,841	4,949
Allowance for credit losses - loan commitments, ending balance		4,180	6,508	235
Total ending allowance for credit losses - loans and loan commitments		11,490	17,349	5,184
Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses - loans, beginning balance	20,293	110,652	20,293	20,848
Allowance for credit losses - loan commitments, beginning balance	22	712	22	33
Total beginning allowance for credit losses - loans and loan commitments	20,315	111,364	20,315	20,881
Provision for loan losses		44,831	78,210	2,560
Provision for loan commitments		511	712	(11)
Total provision for credit losses - loans and loan commitments		45,342	78,922	2,549
Charge-offs		(1,825)	(1,747)	(3,867)
Recoveries		1,359	796	752
Net recoveries (charge-offs)		(466)	(951)	(3,115)
Allowance for credit losses - loans, ending balance		65,355	110,652	20,293
Allowance for credit losses - loan commitments, ending balance		201	712	22
Total ending allowance for credit losses - loans and loan commitments		65,556	111,364	20,315
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses - loans, beginning balance	4,311	17,851	4,311	3,822
Allowance for credit losses - loan commitments, beginning balance	15	955	15	12
Total beginning allowance for credit losses - loans and loan commitments	4,326	18,806	4,326	3,834
Provision for loan losses		2,708	9,065	1,400
Provision for loan commitments		621	560	3
Total provision for credit losses - loans and loan commitments		2,087	9,625	1,403
Charge-offs		(873)	(1,415)	(1,276)
Recoveries		1,131	640	365
Net recoveries (charge-offs)		(258)	(775)	(911)
Allowance for credit losses - loans, ending balance		15,401	17,851	4,311
Allowance for credit losses - loan commitments, ending balance		1,576	955	15
Total ending allowance for credit losses - loans and loan commitments		16,977	18,806	4,326
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses - loans, beginning balance	2,951	6,507	2,951	2,797
Allowance for credit losses - loan commitments, beginning balance	41	19	41	39
Total beginning allowance for credit losses - loans and loan commitments	2,992	6,526	2,992	2,836
Provision for loan losses		2,286	2,980	1,130
Provision for loan commitments		253	19	2
Total provision for credit losses - loans and loan commitments		2,033	2,999	1,132
Charge-offs		(2,995)	(3,615)	(2,719)
Recoveries		2,511	1,574	1,743
Net recoveries (charge-offs)		(484)	(2,041)	(976)
Allowance for credit losses - loans, ending balance		3,737	6,507	2,951
Allowance for credit losses - loan commitments, ending balance		272	19	41
Total ending allowance for credit losses - loans and loan commitments		4,009	6,526	2,992
ASU 2016-13 [Member] | Revision of Prior Period, Accounting Standards Update, Adjustment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for loan losses	41,400		41,442
ASU 2016-13 [Member] | Revision of Prior Period, Accounting Standards Update, Adjustment [Member] | Commercial and Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for loan losses			22,357
ASU 2016-13 [Member] | Revision of Prior Period, Accounting Standards Update, Adjustment [Member] | Deposit Overdraft [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for loan losses			213
ASU 2016-13 [Member] | Commercial Real Estate [Member] | Revision of Prior Period, Accounting Standards Update, Adjustment [Member] | Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for loan losses			1,524
ASU 2016-13 [Member] | Commercial Real Estate [Member] | Revision of Prior Period, Accounting Standards Update, Adjustment [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for loan losses			13,078
ASU 2016-13 [Member] | Residential Real Estate [Member] | Revision of Prior Period, Accounting Standards Update, Adjustment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for loan losses			5,630
ASU 2016-13 [Member] | Consumer [Member] | Revision of Prior Period, Accounting Standards Update, Adjustment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for loan losses			2,576
Home Equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for credit losses - loans, beginning balance	4,422	1,487	4,422	4,356
Allowance for credit losses - loan commitments, beginning balance	250	45	250	226
Total beginning allowance for credit losses - loans and loan commitments	$ 4,672	1,532	4,672	4,582
Provision for loan losses		899	1,234	851
Provision for loan commitments		4	30	24
Total provision for credit losses - loans and loan commitments		895	1,264	875
Charge-offs		(414)	(969)	(1,213)
Recoveries		550	501	428
Net recoveries (charge-offs)		(136)	(468)	(785)
Allowance for credit losses - loans, ending balance		724	1,487	4,422
Allowance for credit losses - loan commitments, ending balance		49	45	250
Total ending allowance for credit losses - loans and loan commitments		$ 773	1,532	$ 4,672
Home Equity [Member] | ASU 2016-13 [Member] | Revision of Prior Period, Accounting Standards Update, Adjustment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for loan losses			$ (3,936)