v3.22.4
Condensed Financial Statements of Parent Company (Schedule of Condensed Statements of Cash Flows) (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Condensed Financial Statements, Captions [Line Items]      
Net income $ 579,150 $ 443,079 $ 331,151
Stock-based compensation 18,322 12,753 13,918
Net tax benefit from stock-based compensation 4,602 7,877 852
Net cash provided by (used in) operating activities 722,582 648,293 524,243
Net cash provided by (used in) investing activities (8,277,330) (2,525,015) (1,631,047)
Principal payments on long-term borrowings 0 (13,403) 0
Redemption of Series A preferred stock 0 0 (150,000)
Proceeds from issuance of Series B preferred stock 0 0 145,452
Proceeds from stock option exercises 16,659 54,417 12,557
Purchase of treasury stock (4,391) (3,864) (15,785)
Treasury stock issued to 401(k) stock purchase plan 0 1,749 10,307
Cash dividends paid on preferred stock (6,675) (7,157) (2,016)
Cash dividends paid on common stock (209,780) (188,786) (180,584)
Net cash provided by (used in) financing activities 2,999,880 8,170,869 7,607,476
Net change in cash and cash equivalents (4,554,868) 6,294,147 6,500,672
Cash and cash equivalents at beginning of year 16,583,000 10,288,853 3,788,181
Cash and cash equivalents at end of year 12,028,132 16,583,000 10,288,853
Parent Company [Member]      
Condensed Financial Statements, Captions [Line Items]      
Net income 579,150 443,079 331,151
Equity in undistributed earnings of subsidiaries (538,439) (232,727) (42,309)
Stock-based compensation 720 700 770
Net tax benefit from stock-based compensation 472 278 370
Net change in other assets and other liabilities (15,249) 23,890 (8,937)
Net cash provided by (used in) operating activities 26,654 235,220 281,045
Redemption of investment in non-bank subsidiary 0 406 0
Net cash provided by (used in) investing activities 0 406 0
Principal payments on long-term borrowings 0 (13,403) 0
Redemption of Series A preferred stock 0 0 (150,000)
Proceeds from issuance of Series B preferred stock 0 0 145,452
Proceeds from stock option exercises 16,659 54,417 12,557
Proceeds from stock-based compensation activities of subsidiaries 17,602 12,053 13,148
Purchase of treasury stock (4,391) (3,864) (15,785)
Treasury stock issued to 401(k) stock purchase plan 0 1,749 10,307
Cash dividends paid on preferred stock (6,675) (7,157) (2,016)
Cash dividends paid on common stock (209,780) (188,786) (180,584)
Net cash provided by (used in) financing activities (186,585) (144,991) (166,921)
Net change in cash and cash equivalents (159,931) 90,635 114,124
Cash and cash equivalents at beginning of year 471,875 381,240 267,116
Cash and cash equivalents at end of year $ 311,944 $ 471,875 $ 381,240