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Loan and Lease Receivables, Impaired Loans and Leases and Allowance for Loan and Lease Losses (Loan Composition) (Details) - USD ($) $ in Thousands | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015
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Receivables [Abstract] |  |  |  |  |  |
Commercial real estate — owner occupied | $ 183,161 |  | $ 176,459 |  |  |
Commercial real estate — non-owner occupied | 468,778 |  | 473,158 |  |  |
Land development | 46,500 |  | 56,638 |  |  |
Construction | 104,515 |  | 101,206 |  |  |
Multi-family | 124,488 |  | 92,762 |  |  |
1-4 family | 38,922 |  | 45,651 |  |  |
Total commercial real estate | 966,364 |  | 945,874 |  |  |
Commercial and industrial | 437,955 |  | 450,298 |  |  |
Direct financing leases, net | 29,216 |  | 30,951 |  |  |
Home equity and second mortgages | 7,973 |  | 8,412 |  |  |
Other | 17,976 |  | 16,329 |  |  |
Total consumer and other | 25,949 |  | 24,741 |  |  |
Total gross loans and leases receivable | 1,459,484 |  | 1,451,864 |  |  |
Allowance for loan and lease losses | 21,677 | $ 21,666 | 20,912 | $ 18,154 | $ 16,684 | $ 16,316
Deferred loan fees | 1,309 |  | 1,189 |  |  |
Loans and leases receivable, net | $ 1,436,498 |  | $ 1,429,763 |  |  |

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