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Condensed Financial Information of Parent Company (Schedule of Condensed Balance Sheets) (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | --- | --- | ---
Assets |  |  |  |
Cash and due from banks | $ 11,814 | $ 9,015 |  |
Securities available-for-sale, at fair value | 390,552 | 375,696 |  |
Loans, net | 654,691 | 647,420 |  |
Premises and equipment, net | 21,086 | 19,648 |  |
Other assets | 36,388 | 24,116 |  |
Total assets | 1,504,839 | 1,455,506 | $ 1,500,731 |
Liabilities and Shareholders' Equity |  |  |  |
Accounts and drafts payable | 642,287 | 577,259 |  |
Other liabilities | 32,556 | 24,385 |  |
Total liabilities | 1,296,804 | 1,248,128 |  |
Total shareholders equity | 208,035 | 207,378 | $ 200,432 | $ 190,427
Total liabilities and shareholders' equity | 1,504,839 | 1,455,506 |  |
Parent [Member] |  |  |  |
Assets |  |  |  |
Cash and due from banks | 45,464 | 30,165 |  |
Short-term investments | 107,898 | 50,689 |  |
Securities available-for-sale, at fair value | 390,552 | 373,946 |  |
Loans, net | 47,184 | 87,615 |  |
Investments in subsidiaries | 101,824 | 91,770 |  |
Premises and equipment, net | 20,375 | 18,886 |  |
Other assets | 161,317 | 150,135 |  |
Total assets | 874,614 | 803,206 |  |
Liabilities and Shareholders' Equity |  |  |  |
Accounts and drafts payable | 640,945 | 576,919 |  |
Other liabilities | 25,415 | 18,732 |  |
Total liabilities | 666,360 | 595,651 |  |
Total shareholders equity | 208,254 | 207,555 |  |
Total liabilities and shareholders' equity | $ 874,614 | $ 803,206 |  |

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