Revenue from Contracts with Customers - Summary of Sources of Noninterest Income that are Subject to Revenue Recognition Guidance (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation Of Revenue [Line Items]
Brokerage services income	$ 87,877	$ 62,791	$ 47,428
Other revenues from operations:
Total other income	2,356,603	2,166,994	2,088,444
Service Charges on Deposit Accounts [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer	446,604	402,113	370,788
Trust Income [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer	740,717	644,716	601,884
ASU 2014-09 [Member]
Disaggregation Of Revenue [Line Items]
Brokerage services income	87,877	62,791	47,428
Other revenues from operations:
Merchant discount and credit card fees	159,256	131,405	102,472
Other	89,947	83,648	84,611
Total other income	1,524,401	1,324,673	1,207,183
ASU 2014-09 [Member] | Service Charges on Deposit Accounts [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer	446,604	402,113	370,788
ASU 2014-09 [Member] | Trust Income [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer	740,717	644,716	601,884
ASU 2014-09 [Member] | Business Banking [Member]
Other revenues from operations:
Merchant discount and credit card fees	62,040	52,343	40,475
Total other income	133,103	106,159	90,612
ASU 2014-09 [Member] | Business Banking [Member] | Service Charges on Deposit Accounts [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer	71,057	53,816	50,119
ASU 2014-09 [Member] | Business Banking [Member] | Trust Income [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer	6		18
ASU 2014-09 [Member] | Commercial Banking [Member]
Other revenues from operations:
Merchant discount and credit card fees	67,433	55,164	45,528
Other	14,358	5,968	9,408
Total other income	193,029	160,012	148,098
ASU 2014-09 [Member] | Commercial Banking [Member] | Service Charges on Deposit Accounts [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer	111,238	98,880	92,720
ASU 2014-09 [Member] | Commercial Banking [Member] | Trust Income [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer			442
ASU 2014-09 [Member] | Commercial Real Estate [Member]
Other revenues from operations:
Merchant discount and credit card fees	3,924	2,661	2,221
Other	10,183	7,304	6,218
Total other income	28,676	21,818	18,691
ASU 2014-09 [Member] | Commercial Real Estate [Member] | Service Charges on Deposit Accounts [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer	14,569	11,853	10,252
ASU 2014-09 [Member] | Discretionary Portfolio [Member]
Other revenues from operations:
Other	91	1,359	1,625
Total other income	91	1,359	1,625
ASU 2014-09 [Member] | Residential Mortgage Banking [Member]
Other revenues from operations:
Other	3,401	6,166	4,732
Total other income	3,401	6,166	4,732
ASU 2014-09 [Member] | Retail Banking [Member]
Other revenues from operations:
Merchant discount and credit card fees	24,454	20,850	13,481
Other	23,796	22,878	20,813
Total other income	292,121	276,007	246,152
ASU 2014-09 [Member] | Retail Banking [Member] | Service Charges on Deposit Accounts [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer	243,871	232,279	211,858
ASU 2014-09 [Member] | All Other [Member]
Disaggregation Of Revenue [Line Items]
Brokerage services income	87,877	62,791	47,428
Other revenues from operations:
Merchant discount and credit card fees	1,405	387	767
Other	38,118	39,973	41,815
Total other income	873,980	753,152	697,273
ASU 2014-09 [Member] | All Other [Member] | Service Charges on Deposit Accounts [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer	5,869	5,285	5,839
ASU 2014-09 [Member] | All Other [Member] | Trust Income [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customer	$ 740,711	$ 644,716	$ 601,424