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Parent Company Condensed Financial Statements (Condensed Balance Sheet) (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | --- | ---
ASSETS |  |  |  |
Cash and cash equivalents due from subsidiary bank | $ 3,261,149 | $ 3,001,377 |  |
Goodwill | 465,697 | 465,547 | $ 469,433 |
Other assets | 917,095 | 743,686 |  |
TOTAL | 44,196,096 | 41,042,356 | 37,121,563 |
LIABILITIES |  |  |  |
Long-term debt |  | 146,835 |  |
Total liabilities | 39,178,479 | 36,618,382 |  |
STOCKHOLDERS’ EQUITY |  |  |  |
Common stock, $0.001 par value, 200,000,000 shares authorized; 166,621,959 and 165,867,587 shares issued in 2019 and 2018, respectively | 167 | 166 |  |
Additional paid-in capital | 1,826,345 | 1,789,811 |  |
Retained earnings | 3,689,377 | 3,160,132 |  |
Treasury stock, at cost — 20,996,574 shares in 2019 and 20,906,224 shares in 2018 | (479,864) | (467,961) |  |
AOCI, net of tax | (18,408) | (58,174) |  |
Total stockholders’ equity | 5,017,617 | 4,423,974 | $ 3,841,951 | $ 3,427,741
TOTAL | 44,196,096 | 41,042,356 |  |
Parent Company |  |  |  |
ASSETS |  |  |  |
Cash and cash equivalents due from subsidiary bank | 166,131 | 149,411 |  |
Investments in tax credit and other investments, net | 11,637 | 23,259 |  |
Goodwill | 150 | 0 |  |
Other assets | 3,941 | 6,487 |  |
TOTAL | 5,175,155 | 4,584,679 |  |
LIABILITIES |  |  |  |
Long-term debt | 147,101 | 146,835 |  |
Other liabilities | 10,437 | 13,870 |  |
Total liabilities | 157,538 | 160,705 |  |
STOCKHOLDERS’ EQUITY |  |  |  |
Common stock, $0.001 par value, 200,000,000 shares authorized; 166,621,959 and 165,867,587 shares issued in 2019 and 2018, respectively | 167 | 166 |  |
Additional paid-in capital | 1,826,345 | 1,789,811 |  |
Retained earnings | 3,689,377 | 3,160,132 |  |
Treasury stock, at cost — 20,996,574 shares in 2019 and 20,906,224 shares in 2018 | (479,864) | (467,961) |  |
AOCI, net of tax | (18,408) | (58,174) |  |
Total stockholders’ equity | 5,017,617 | 4,423,974 |  |
TOTAL | 5,175,155 | 4,584,679 |  |
Parent Company | Bank |  |  |  |
Balance sheets |  |  |  |
Investments in Subsidiaries | 4,987,666 | 4,401,860 |  |
Parent Company | Nonbank |  |  |  |
Balance sheets |  |  |  |
Investments in Subsidiaries | $ 5,630 | $ 3,662 |  |

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