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Note 3 - Loans Leases Receivable - Loans by Internally Assigned Risk Rating (Details) - USD ($) | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Loans |  | $ 2,669,013,113 | $ 2,397,414,282
Commercial Portfolio Segment [Member] |  |  |
Loans | [1] | 1,034,530,786 | 827,637,263
Commercial Portfolio Segment [Member] | Pass [Member] |  |  |
Loans |  | 1,000,751,792 | 796,568,451
Commercial Portfolio Segment [Member] | Special Mention [Member] |  |  |
Loans |  | 9,694,041 | 6,305,772
Commercial Portfolio Segment [Member] | Substandard [Member] |  |  |
Loans |  | 24,084,953 | 24,763,040
Commercial Portfolio Segment [Member] | Doubtful [Member] |  |  |
Loans |  |  |
Commercial Real Estate Portfolio Segment [Member] |  |  |
Loans |  | 1,157,855,663 | 1,093,458,860
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Commercial Real Estate Loans [Member] |  |  |
Loans |  | 327,144,766 | 332,387,621
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] |  |  |
Loans |  | 168,992,704 | 165,149,491
Commercial Real Estate Portfolio Segment [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member] |  |  |
Loans |  | 661,718,193 | 595,921,748
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Owner Occupied Commercial Real Estate Loans [Member] |  |  |
Loans |  | 313,179,076 | 314,447,662
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Construction Loans [Member] |  |  |
Loans |  | 161,772,865 | 158,108,465
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member] |  |  |
Loans |  | 639,045,018 | 582,854,048
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] | Owner Occupied Commercial Real Estate Loans [Member] |  |  |
Loans |  | 9,155,153 | 7,559,380
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] | Construction Loans [Member] |  |  |
Loans |  | 2,167,999 | 1,780,000
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member] |  |  |
Loans |  | 6,297,895 | 4,437,122
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] | Owner Occupied Commercial Real Estate Loans [Member] |  |  |
Loans |  | 4,810,537 | 10,380,369
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] | Construction Loans [Member] |  |  |
Loans |  | 5,051,840 | 5,261,026
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member] |  |  |
Loans |  | 16,375,280 | 8,630,578
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member] | Owner Occupied Commercial Real Estate Loans [Member] |  |  |
Loans |  |  | 210
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member] | Construction Loans [Member] |  |  |
Loans |  |  |
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member] |  |  |
Loans |  |  |
Commercial and Commercial Real Estate Portfolio Segments [Member] |  |  |
Loans |  | $ 2,192,386,449 | $ 1,921,096,123
As a % of Total |  | 100.00% | 100.00%
Commercial and Commercial Real Estate Portfolio Segments [Member] | Pass [Member] |  |  |
Loans |  | $ 2,114,748,751 | $ 1,851,978,626
As a % of Total |  | 96.45% | 96.40%
Commercial and Commercial Real Estate Portfolio Segments [Member] | Special Mention [Member] |  |  |
Loans |  | $ 27,315,088 | $ 20,082,274
As a % of Total |  | 1.25% | 1.05%
Commercial and Commercial Real Estate Portfolio Segments [Member] | Substandard [Member] |  |  |
Loans |  | $ 50,322,610 | $ 49,035,013
As a % of Total |  | 2.30% | 2.55%
Commercial and Commercial Real Estate Portfolio Segments [Member] | Doubtful [Member] |  |  |
Loans |  |  | $ 210
As a % of Total |  |  | 0.00%
[1] | Includes loans outstanding at QCBT's wholly-owned subsidiary, m2, totaling $60,981,381 and $38,668,209 as of September 30, 2017 and December 31, 2016, respectively.

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