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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 | Sep. 30, 2018 | Jun. 30, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Dec. 31, 2016
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Receivables [Abstract] |  |  |  |  |  |
Commercial real estate — owner occupied | $ 203,733 |  | $ 200,387 |  |  |
Commercial real estate — non-owner occupied | 487,842 |  | 470,236 |  |  |
Land development | 45,009 |  | 40,154 |  |  |
Construction | 132,271 |  | 125,157 |  |  |
Multi-family | 174,664 |  | 136,978 |  |  |
1-4 family | 35,729 |  | 44,976 |  |  |
Total commercial real estate | 1,079,248 |  | 1,017,888 |  |  |
Commercial and industrial | 457,932 |  | 429,002 |  |  |
Direct financing leases, net | 31,090 |  | 30,787 |  |  |
Home equity and second mortgages | 8,388 |  | 7,262 |  |  |
Other | 23,451 |  | 18,099 |  |  |
Total consumer and other | 31,839 |  | 25,361 |  |  |
Total gross loans and leases receivable | 1,600,109 |  | 1,503,038 |  |  |
Allowance for loan and lease losses | 20,455 | $ 20,932 | 18,763 | $ 19,923 | $ 21,677 | $ 20,912
Deferred loan fees | 1,502 |  | 1,443 |  |  |
Loans and leases receivable, net | $ 1,578,152 |  | $ 1,482,832 |  |  |

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- Definition Amount before allowance of consumer loans and leases not otherwise specified in the taxonomy. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(a)(7),(b)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522 + Details
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