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Note 3 - Loans Leases Receivable - Composition of the Loan Lease Portfolio (Details) - USD ($) | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016
--- | --- | --- | --- | --- | --- | ---
Gross loans/leases receivable | $ 3,114,792,423 |  | $ 2,964,485,400 |  |  |
Less allowance | (37,545,076) | $ (36,532,602) | (34,355,728) | $ (33,356,632) | $ (32,059,150) | $ (30,757,448)
Net loans/leases receivable | 3,077,247,347 |  | 2,930,129,672 |  |  |
Plus deferred loan/lease origination costs, net of fees | 8,890,965 |  | 7,771,907 |  |  |
Loans and Leases Receivable, Net of Deferred Income | 3,105,901,458 |  | 2,956,713,493 |  |  |
Commercial Portfolio Segment [Member] |  |  |  |  |  |
Less allowance | (15,233,871) | (15,065,245) | (14,323,036) | (14,207,733) | (12,954,090) | (12,545,110)
Loans and Leases Receivable, Net of Deferred Income | 1,273,000,094 |  | 1,134,516,315 |  |  |
Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |  |
Less allowance | (15,819,040) | (14,938,020) | (13,962,688) | (12,999,233) | (12,643,266) | (11,670,609)
Loans and Leases Receivable, Net of Deferred Income | 1,349,318,914 |  | 1,303,491,882 |  |  |
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Commercial Real Estate Loans [Member] |  |  |  |  |  |
Loans and Leases Receivable, Net of Deferred Income | 349,007,830 |  | 332,742,477 |  |  |
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] |  |  |  |  |  |
Loans and Leases Receivable, Net of Deferred Income | 162,644,566 |  | 186,402,404 |  |  |
Commercial Real Estate Portfolio Segment [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member] |  |  |  |  |  |
Loans and Leases Receivable, Net of Deferred Income | 837,666,518 |  | 784,347,000 |  |  |
Finance Leases Portfolio Segment [Member] |  |  |  |  |  |
Net minimum lease payments to be received | 147,388,211 |  | 156,583,887 |  |  |
Estimated unguaranteed residual values of leased assets | 929,932 |  | 929,932 |  |  |
Unearned lease/residual income | (15,121,530) |  | (16,065,587) |  |  |
Gross loans/leases receivable | 137,356,324 |  | 146,072,259 |  |  |
Less allowance | (2,724,355) | (2,730,301) | (2,382,098) | (2,638,301) | (2,978,260) | (3,111,898)
Net loans/leases receivable | 134,631,969 |  | 143,690,161 |  |  |
Plus deferred loan/lease origination costs, net of fees | 4,159,711 |  | 4,624,027 |  |  |
Loans and Leases Receivable, Net of Deferred Income | 133,196,613 |  | 141,448,232 |  |  |
Residential Portfolio Segment [Member] |  |  |  |  |  |
Less allowance | (2,433,102) | (2,375,219) | (2,466,431) | (2,430,454) | (2,375,864) | (2,342,344)
Loans and Leases Receivable, Net of Deferred Income | 257,433,713 |  | 258,646,265 |  |  |
Consumer Portfolio Segment [Member] |  |  |  |  |  |
Less allowance | (1,334,708) | $ (1,423,817) | (1,221,475) | $ (1,080,911) | $ (1,107,670) | $ (1,087,487)
Loans and Leases Receivable, Net of Deferred Income | $ 92,952,124 |  | $ 118,610,799 |  |  |

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- Definition Amount, after accumulated amortization, of debt issuance costs classified as noncurrent. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The estimated portion of pretax income and investment tax credit remaining to be allocated to income over the lease term. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 30 -Paragraph 14 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=77895730&loc=d3e42840-112730 + Details
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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. 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 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522 + Details
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