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Note 3 - Loans Leases Receivable - Loans by Internally Assigned Risk Rating (Details) - USD ($) | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Loans and leases | $ 3,105,901,458 | $ 2,956,713,493
Commercial Portfolio Segment [Member] |  |
Loans and leases | 1,273,000,094 | 1,134,516,315
Commercial Portfolio Segment [Member] | Internally Assigned Risk Rating [Member] |  |
Loans and leases | 1,180,184,352 | 1,067,757,917
Commercial Portfolio Segment [Member] | Pass [Member] |  |
Loans and leases | 1,135,035,263 | 1,031,963,703
Commercial Portfolio Segment [Member] | Special Mention [Member] |  |
Loans and leases | 29,414,324 | 10,944,924
Commercial Portfolio Segment [Member] | Substandard [Member] |  |
Loans and leases | 15,734,765 | 24,578,731
Commercial Portfolio Segment [Member] | Doubtful [Member] |  |
Loans and leases |  | 270,559
Commercial Real Estate Portfolio Segment [Member] |  |
Loans and leases | 1,349,318,914 | 1,303,491,882
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Commercial Real Estate Loans [Member] |  |
Loans and leases | 349,007,830 | 332,742,477
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] |  |
Loans and leases | 162,644,566 | 186,402,404
Commercial Real Estate Portfolio Segment [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member] |  |
Loans and leases | 837,666,518 | 784,347,000
Commercial Real Estate Portfolio Segment [Member] | Internally Assigned Risk Rating [Member] | Owner Occupied Commercial Real Estate Loans [Member] |  |
Loans and leases | 349,007,830 | 332,742,477
Commercial Real Estate Portfolio Segment [Member] | Internally Assigned Risk Rating [Member] | Construction Loans [Member] |  |
Loans and leases | 162,644,566 | 186,402,404
Commercial Real Estate Portfolio Segment [Member] | Internally Assigned Risk Rating [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member] |  |
Loans and leases | 837,666,518 | 784,347,000
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Owner Occupied Commercial Real Estate Loans [Member] |  |
Loans and leases | 342,518,625 | 318,293,608
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Construction Loans [Member] |  |
Loans and leases | 160,224,065 | 179,142,839
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member] |  |
Loans and leases | 805,031,050 | 767,119,909
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] | Owner Occupied Commercial Real Estate Loans [Member] |  |
Loans and leases | 3,984,113 | 8,230,060
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] | Construction Loans [Member] |  |
Loans and leases |  | 1,780,000
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member] |  |
Loans and leases | 10,804,187 | 10,068,870
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] | Owner Occupied Commercial Real Estate Loans [Member] |  |
Loans and leases | 2,505,092 | 6,218,809
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] | Construction Loans [Member] |  |
Loans and leases | 2,420,501 | 5,479,565
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member] |  |
Loans and leases | 21,831,281 | 7,158,221
Commercial and Commercial Real Estate Portfolio Segments [Member] | Internally Assigned Risk Rating [Member] |  |
Loans and leases | $ 2,529,503,266 | $ 2,371,249,799
As a % of Total | 100.00% | 100.00%
Commercial and Commercial Real Estate Portfolio Segments [Member] | Pass [Member] |  |
Loans and leases | $ 2,442,809,003 | $ 2,296,520,059
As a % of Total | 96.57% | 96.85%
Commercial and Commercial Real Estate Portfolio Segments [Member] | Special Mention [Member] |  |
Loans and leases | $ 44,202,624 | $ 31,023,854
As a % of Total | 1.75% | 1.31%
Commercial and Commercial Real Estate Portfolio Segments [Member] | Substandard [Member] |  |
Loans and leases | $ 42,491,639 | $ 43,435,326
As a % of Total | 1.68% | 1.83%
Commercial and Commercial Real Estate Portfolio Segments [Member] | Doubtful [Member] |  |
Loans and leases |  | $ 270,559
As a % of Total |  | 0.01%

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- Definition Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. 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 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524 + Details
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