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Parent Company Financial Statements, Condensed Balance Sheets (Details) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Assets: |  |
Cash on deposit | $ 51,974 | $ 56,299
Goodwill | 65,490 | 65,490
Premises and equipment, net | 48,188 | 49,980
Other assets | 33,827 | 27,378
Total assets | 3,903,934 | 3,723,765
Liabilities and shareholders' equity: |  |
Long-term debt | 61,341 | 61,341
Other liabilities | 21,431 | 23,401
Total liabilities | 3,428,351 | 3,275,888
Shareholders' equity | 475,583 | 447,877
Total liabilities and shareholders' equity | 3,903,934 | 3,723,765
Parent Company [Member] |  |
Assets: |  |
Cash on deposit | 1,462 | 995
Investment in and advances to subsidiaries | 531,702 | 503,252
Goodwill | 4,973 | 4,973
Premises and equipment, net | 145 | 207
Other assets | 911 | 1,173
Total assets | 539,193 | 510,600
Liabilities and shareholders' equity: |  |
Long-term debt | 61,341 | 61,341
Other liabilities | 2,269 | 1,382
Total liabilities | 63,610 | 62,723
Shareholders' equity | 475,583 | 447,877
Total liabilities and shareholders' equity | $ 539,193 | $ 510,600

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