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Parent Corporation Only Financial Statements (Details) - Condensed Statements of Condition - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
ASSETS |  |  |
Cash and cash equivalents |  | $ 39,161 | $ 52,565
Securities available-for-sale |  | 412,034 | 435,284
Equity securities |  | 11,460 |
Other assets |  | 30,216 | 28,275
Total assets |  | 5,462,092 | 5,108,442
LIABILITIES AND STOCKHOLDERS' EQUITY |  |  |
Subordinated debentures |  | 128,556 | 54,699
Stockholders' equity |  | 613,927 | 565,437
Total liabilities and stockholders' equity |  | 5,462,092 | 5,108,442
Parent Company [Member] |  |  |
ASSETS |  |  |
Cash and cash equivalents |  | 22,071 | 7,506
Investment in subsidiaries |  | 692,516 | 614,083
Receivable due from subsidiaries |  | 32,250 |
Securities available-for-sale |  | 176 | 779
Equity securities | [1] | 607 |
Other assets |  | 1,282 | 322
Total assets |  | 748,902 | 622,690
LIABILITIES AND STOCKHOLDERS' EQUITY |  |  |
Other liabilities |  | 6,419 | 2,554
Subordinated debentures |  | 128,556 | 54,699
Stockholders' equity |  | 613,927 | 565,437
Total liabilities and stockholders' equity |  | $ 748,902 | $ 622,690
[1] | Beginning January 1, 2018, equity securities were reclassified out of investment securities available-for-sale in conjunction with ASU 2016-01.

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