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Parent Company Condensed Financial Statements (Condensed Statement of Cash Flows) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Statement of cash flows |  |  |
Net income | $ 872,981 | $ 567,797 | $ 674,035
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Deferred income tax expense (benefit) | 4,762 | (41,515) | (21,604)
Net change in other assets | 124,496 | (340,566) | (172,506)
Net change in other liabilities | (29,412) | 170,420 | 6,015
Net cash provided by operating activities | 1,168,422 | 692,644 | 733,145
CASH FLOWS FROM INVESTING ACTIVITIES |  |  |
Net increase in investments in tax credit investments | (189,836) | (154,887) | (146,902)
Distributions received from equity method investees | 14,440 | 15,901 | 9,502
Other investing activities | (925) | 6,858 | 2,560
Net cash (used in) provided by investing activities | (9,117,204) | (6,873,736) | (2,592,926)
Common stock: |  |  |
Proceeds from issuance pursuant to various stock compensation plans and agreements | 2,573 | 2,326 | 3,383
Stocks tendered for payment of withholding taxes | (15,702) | (8,253) | (14,635)
Repurchase of common stocks pursuant to the Stock Repurchase Program | 0 | (145,966) | 0
Cash dividends paid | (188,762) | (158,222) | (155,107)
Net cash provided by financing activities | 7,835,045 | 6,908,908 | 2,125,938
Net (decrease) increase in cash and cash equivalents | (105,036) | 756,822 | 259,772
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR | 4,017,971 | 3,261,149 | 3,001,377
CASH AND CASH EQUIVALENTS, END OF YEAR | 3,912,935 | 4,017,971 | 3,261,149
Parent Company |  |  |
Statement of cash flows |  |  |
Net income | 872,981 | 567,797 | 674,035
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Undistributed earnings of subsidiaries, principally bank | (680,958) | (65,046) | (498,569)
Amortization expense | 1,877 | 1,523 | 8,703
Deferred income tax expense (benefit) | 2,721 | 491 | (10,132)
Net change in other assets | (5,685) | 40 | 10,246
Net change in other liabilities | (81,706) | 77,052 | (18)
Net cash provided by operating activities | 109,230 | 581,857 | 184,265
CASH FLOWS FROM INVESTING ACTIVITIES |  |  |
Net increase in investments in tax credit investments | (346) | (172) | (292)
Distributions received from equity method investees | 436 | 4,096 | 2,577
Net increase in investments in and advances to nonbank subsidiaries | (1,476) | (2,732) | (3,314)
Other investing activities | 0 | 0 | (157)
Net cash (used in) provided by investing activities | (1,386) | 1,192 | (1,186)
Common stock: |  |  |
Proceeds from issuance pursuant to various stock compensation plans and agreements | 2,573 | 2,326 | 3,383
Stocks tendered for payment of withholding taxes | (15,702) | (8,253) | (14,635)
Repurchase of common stocks pursuant to the Stock Repurchase Program | 0 | (145,966) | 0
Cash dividends paid | (188,762) | (158,222) | (155,107)
Net cash provided by financing activities | (201,891) | (310,115) | (166,359)
Net (decrease) increase in cash and cash equivalents | (94,047) | 272,934 | 16,720
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR | 439,065 | 166,131 | 149,411
CASH AND CASH EQUIVALENTS, END OF YEAR | $ 345,018 | $ 439,065 | $ 166,131

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