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Parent Company Financial Information (Tables) | 12 Months Ended
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Dec. 31, 2016
Condensed Financial Information of Parent Company Only Disclosure [Abstract] |
Condensed Balance Sheets - Parent Company Only | Condensed Balance Sheets—Parent Company Only
|  | December 31,
2016 |  | 2015
|  | (in thousands)
Assets |  |  |  |
Cash and due from banking subsidiary |  | $ | 1,718 |  |  | $ | 3,429 |
Interest-earning deposits |  | 729 |  |  | 560 |
Total cash and cash equivalents |  | 2,447 |  |  | 3,989 |
Investment in banking subsidiary |  | 1,238,712 |  |  | 1,228,070 |
Investment in other subsidiaries |  | 4,978 |  |  | 5,567 |
Other assets |  | 5,146 |  |  | 4,833 |
Total assets |  | $ | 1,251,283 |  |  | $ | 1,242,459 |
Liabilities and Shareholders’ Equity |  |  |  |
Other liabilities |  | $ | 271 |  |  | $ | 331 |
Total liabilities |  | 271 |  |  | 331 |
Shareholders’ equity |  | 1,251,012 |  |  | 1,242,128 |
Total liabilities and shareholders’ equity |  | $ | 1,251,283 |  |  | $ | 1,242,459 |
Condensed Statements of Income - Parent Company Only | Condensed Statements of Income—Parent Company Only
|  | Years Ended December 31,
2016 |  | 2015 |  | 2014
(in thousands)
Income |  |  |  |  |  |
Dividend from banking subsidiary |  | $ | 83,500 |  |  | $ | 67,000 |  |  | $ | 16,200 |
Interest-earning deposits |  | 4 |  |  | 5 |  |  | 25 |
Other income |  | 8 |  |  | 92 |  |  | 10 |
Total income |  | 83,512 |  |  | 67,097 |  |  | 16,235 |
Expense |  |  |  |  |  |
Compensation and employee benefits |  | 543 |  |  | 618 |  |  | 530 |
Other borrowings |  | — |  |  | 5 |  |  | 83 |
Other expense |  | 1,608 |  |  | 1,368 |  |  | 1,433 |
Total expenses |  | 2,151 |  |  | 1,991 |  |  | 2,046 |
Income before income tax benefit and equity in undistributed earnings of subsidiaries |  | 81,361 |  |  | 65,106 |  |  | 14,189 |
Income tax benefit |  | (748 | ) |  | (663 | ) |  | (704 | )
Income before equity in undistributed earnings of subsidiaries |  | 82,109 |  |  | 65,769 |  |  | 14,893 |
Equity in undistributed earnings of subsidiaries |  | 22,757 |  |  | 33,058 |  |  | 66,681 |
Net income |  | $ | 104,866 |  |  | $ | 98,827 |  |  | $ | 81,574 |
Condensed Statements of Cash Flows - Parent Company Only | Condensed Statements of Cash Flows—Parent Company Only
|  | Years Ended December 31,
2016 |  | 2015 |  | 2014
(in thousands)
Operating Activities |  |  |  |  |  |
Net income |  | $ | 104,866 |  |  | $ | 98,827 |  |  | $ | 81,574 |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |
Equity in undistributed earnings of subsidiaries |  | (22,757 | ) |  | (33,058 | ) |  | (66,681 | )
Stock-based compensation expense |  | 5,009 |  |  | 4,090 |  |  | 2,859 |
Net changes in other assets and liabilities |  | (394 | ) |  | (3,170 | ) |  | (403 | )
Net cash provided by operating activities |  | 86,724 |  |  | 66,689 |  |  | 17,349 |
Investing Activities |  |  |  |  |  |
Net cash acquired in business combinations |  | — |  |  | — |  |  | 10,277 |
Net cash provided by investing activities |  | — |  |  | — |  |  | 10,277 |
Financing Activities |  |  |  |  |  |
Preferred stock dividends |  | (157 | ) |  | (137 | ) |  | (96 | )
Common stock dividends |  | (88,677 | ) |  | (77,263 | ) |  | (49,494 | )
Repayment of other borrowings |  | — |  |  | (8,248 | ) |  | (14,636 | )
Exercise of warrants |  | — |  |  | — |  |  | 5,000 |
Purchase and retirement of common stock |  | (1,125 | ) |  | (906 | ) |  | (622 | )
Proceeds from exercise of stock options |  | 1,349 |  |  | 1,258 |  |  | 929 |
Excess tax benefit associated with share-based compensation |  | 344 |  |  | — |  |  | 205 |
Net cash used in financing activities |  | (88,266 | ) |  | (85,296 | ) |  | (58,714 | )
Decrease in cash and cash equivalents |  | (1,542 | ) |  | (18,607 | ) |  | (31,088 | )
Cash and cash equivalents at beginning of year |  | 3,989 |  |  | 22,596 |  |  | 53,684 |
Cash and cash equivalents at end of year |  | $ | 2,447 |  |  | $ | 3,989 |  |  | $ | 22,596 |

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