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Condensed Parent Company Financial Statements - Summary of Balance Sheet of Parent Company (Detail) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
ASSETS |  |  |
Cash | $ 222,043 | $ 228,431 |
Goodwill | 148,604 | 79,749 | $ 54,042
Total assets | 8,565,758 | 7,574,258 | 7,253,156
LIABILITIES AND STOCKHOLDERS' EQUITY |  |  |
Other liabilities | 49,230 | 37,495 |
Junior subordinated debentures | 26,804 | 26,804 |
Stockholders’ equity | 1,004,989 | 902,789 | $ 775,629
Total liabilities and stockholders' equity | 8,565,758 | 7,574,258 |
Parent Company [Member] |  |  |
ASSETS |  |  |
Cash | 5,761 | 105,089 |
Investments in subsidiaries | 946,311 | 822,336 |
Goodwill | 69,478 | 624 |
Core deposit premium | 9,617 |  |
Dividends receivable | 11,622 | 11,058 |
Other assets | 2,313 | 958 |
Total assets | 1,045,102 | 940,065 |
LIABILITIES AND STOCKHOLDERS' EQUITY |  |  |
Other liabilities | 13,309 | 10,472 |
Junior subordinated debentures | 26,804 | 26,804 |
Stockholders’ equity | 1,004,989 | 902,789 |
Total liabilities and stockholders' equity | $ 1,045,102 | $ 940,065 |

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