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Condensed Financial Statements of Parent Company - Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Cash flows from operating activities: |  |  |
Net income | $ 186,483 | $ 178,871 | $ 87,554
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 33,121 | 35,696 | 28,704
Share-based compensation | 8,839 | 8,783 | 6,934
Gain on sale of securities available for sale | (2,711) | 655 | (1,421)
Decrease (increase) in other assets | (44,767) | (1,168) | (32,324)
Decrease in other liabilities | 36,023 | 3,359 | 7,076
Net cash provided by operating activities | 181,028 | 283,711 | 197,890
Cash flows from investing activities: |  |  |
Net cash inflow from acquisitions |  |  | 185,163
Net cash used in investing activities | (795,053) | (282,149) | (60,900)
Cash flows from financing activities: |  |  |
Repayment of other borrowings | (150,007) | (540,007) | (390,811)
Common stock issuance | 1,394 | 1,331 | 1,055
Common stock repurchased | (159,431) | (70,577) | (5,512)
Dividends paid on common stock | (57,696) | (50,557) | (38,623)
Stock options exercised | 1,230 | 1,032 | 1,965
Net cash provided by (used in) financing activities | 893,746 | 29,794 | (133,811)
Net increase in cash and cash equivalents | 279,721 | 31,356 | 3,179
Cash and cash equivalents at beginning of period | 408,983 | 377,627 | 374,448
Cash and cash equivalents at end of period | 688,704 | 408,983 | 377,627
Parent company | Reportable Legal Entities |  |  |
Cash flows from operating activities: |  |  |
Net income | 186,483 | 178,871 | 87,554
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 666 | 666 | 666
Share-based compensation | 8,839 | 8,783 | 6,934
Gain on sale of securities available for sale | (5,366) |  | (486)
Decrease (increase) in other assets | (159) | 1,465 | (1,564)
Decrease in other liabilities | (959) | (2,048) | (6,341)
Undistributed earnings of subsidiary | 20,229 | (73,753) | (33,700)
Net cash provided by operating activities | 209,733 | 113,984 | 53,063
Cash flows from investing activities: |  |  |
Proceeds from sales and calls of other investment securities | 5,366 |  | 687
Net cash inflow from acquisitions |  |  | 15,468
Net cash used in investing activities | 5,366 |  | 16,155
Cash flows from financing activities: |  |  |
Repayment of other borrowings |  |  | (30,000)
Common stock issuance | 1,394 | 1,331 | 1,056
Common stock repurchased | (159,431) | (70,577) | (5,512)
Dividends paid on common stock | (57,696) | (50,557) | (38,623)
Stock options exercised | 1,230 | 1,032 | 1,965
Net cash provided by (used in) financing activities | (214,503) | (118,771) | (71,114)
Net increase in cash and cash equivalents | 596 | (4,787) | (1,896)
Cash and cash equivalents at beginning of period | 21,092 | 25,879 | 27,775
Cash and cash equivalents at end of period | $ 21,688 | $ 21,092 | $ 25,879

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