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Note 21 - Fair Value (Tables) | 12 Months Ended
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Dec. 31, 2018
Notes Tables |
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] |
|  |  |  |  | Fair Value Measurements at Reporting Date Using
|  |  |  |  | Quoted Prices |  | Significant |  |  |
|  |  |  |  | in Active |  | Other |  | Significant
|  |  |  |  | Markets for |  | Observable |  | Unobservable
|  |  |  |  | Identical Assets |  | Inputs |  | Inputs
|  | Fair Value |  | (Level 1) |  | (Level 2) |  | (Level 3)
December 31, 2018: |  |  |  |  |  |  |  |  |  |  |  |
Securities AFS: |  |  |  |  |  |  |  |  |  |  |  |
U.S. govt. sponsored agency securities |  | $ | 36,411,391 |  | $ | — |  | $ | 36,411,391 |  | $ | —
Residential mortgage-backed and related securities |  |  | 159,249,260 |  |  | — |  |  | 159,249,260 |  |  | —
Municipal securities |  |  | 58,546,022 |  |  | — |  |  | 58,546,022 |  |  | —
Other securities |  |  | 6,849,775 |  |  | — |  |  | 6,849,775 |  |  | —
Interest rate caps |  |  | 458,812 |  |  | — |  |  | 458,812 |  |  | —
Interest rate swaps - assets |  |  | 22,195,713 |  |  | — |  |  | 22,195,713 |  |  | —
Total assets measured at fair value |  | $ | 283,710,973 |  | $ | — |  | $ | 283,710,973 |  | $ | —
Interest rate swaps - liabilities |  | $ | 23,346,887 |  | $ | — |  | $ | 23,346,887 |  | $ | —
Total liabilities measured at fair value |  | $ | 23,346,887 |  | $ | — |  | $ | 23,346,887 |  | $ | —
December 31, 2017: |  |  |  |  |  |  |  |  |  |  |  |
Securities AFS: |  |  |  |  |  |  |  |  |  |  |  |
U.S. govt. sponsored agency securities |  | $ | 38,096,534 |  | $ | — |  | $ | 38,096,534 |  | $ | —
Residential mortgage-backed and related securities |  |  | 163,301,304 |  |  | — |  |  | 163,301,304 |  |  | —
Municipal securities |  |  | 66,625,496 |  |  | — |  |  | 66,625,496 |  |  | —
Other securities |  |  | 4,884,573 |  |  | 1,028 |  |  | 4,883,545 |  |  | —
Interest rate caps |  |  | 506,700 |  |  | — |  |  | 506,700 |  |  | —
Interest rate swaps - assets |  |  | 4,397,238 |  |  | — |  |  | 4,397,238 |  |  | —
Total assets measured at fair value |  | $ | 277,811,845 |  | $ | 1,028 |  | $ | 277,810,817 |  | $ | —
Interest rate swaps - liabilities |  | $ | 4,397,238 |  | $ | — |  | $ | 4,397,238 |  | $ | —
Total liabilities measured at fair value |  | $ | 4,397,238 |  | $ | — |  | $ | 4,397,238 |  | $ | —
|  |  |  |  | Fair Value Measurements at Reporting Date Using
|  |  |  |  | Quoted Prices |  | Significant |  |  |
|  |  |  |  | in Active |  | Other |  | Significant
|  |  |  |  | Markets for |  | Observable |  | Unobservable
|  |  |  |  | Identical Assets |  | Inputs |  | Inputs
|  | Fair Value |  | Level 1 |  | Level 2 |  | Level 3
December 31, 2018: |  |  |  |  |  |  |  |  |  |  |  |
Impaired loans/leases |  | $ | 9,656,912 |  | $ | — |  | $ | — |  | $ | 9,656,912
OREO |  |  | 10,127,954 |  |  | — |  |  | — |  |  | 10,127,954
|  | $ | 19,784,866 |  | $ | — |  | $ | — |  | $ | 19,784,866
December 31, 2017: |  |  |  |  |  |  |  |  |  |  |  |
Impaired loans/leases |  | $ | 8,972,337 |  | $ | — |  | $ | — |  | $ | 8,972,337
OREO |  |  | 14,642,973 |  |  | — |  |  | — |  |  | 14,642,973
|  | $ | 23,615,310 |  | $ | — |  | $ | — |  | $ | 23,615,310
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Table Text Block] |
|  | Quantitative Information about Level Fair Value Measurements |
|  | Fair Value |  | Fair Value |  |  |  |  |  |  |  |  |  |  |
|  | December 31, |  | December 31, |  |  |  |  |  |  |  |  |  |  |
|  | 2018 |  | 2017 |  | Valuation Technique |  | Unobservable Input |  | Range |
Impaired loans/leases |  | $ | 9,656,912 |  | $ | 8,972,337 |  | Appraisal of collateral |  | Appraisal adjustments |  | (10.00) | % | to |  | (30.00) | %
OREO |  |  | 10,127,954 |  |  | 14,642,973 |  | Appraisal of collateral |  | Appraisal adjustments |  | 0.00 | % | to |  | (35.00) | %
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] |
|  | Fair Value |  | As of December 31, 2018 |  | As of December 31, 2017
|  | Hierarchy |  | Carrying |  | Estimated |  | Carrying |  | Estimated
|  | Level |  | Value |  | Fair Value |  | Value |  | Fair Value
Cash and due from banks |  | Level 1 |  | $ | 85,522,685 |  | $ | 85,522,685 |  | $ | 75,721,663 |  | $ | 75,721,663
Federal funds sold |  | Level 2 |  |  | 26,398,000 |  |  | 26,398,000 |  |  | 30,197,000 |  |  | 30,197,000
Interest-bearing deposits at financial institutions |  | Level 2 |  |  | 133,198,095 |  |  | 133,198,095 |  |  | 55,765,012 |  |  | 55,765,012
Investment securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |
HTM |  | Level 2 |  |  | 401,912,885 |  |  | 400,770,583 |  |  | 379,474,205 |  |  | 379,749,804
AFS |  | See Previous Table |  |  | 261,056,448 |  |  | 261,056,448 |  |  | 272,907,907 |  |  | 272,907,907
Loans/leases receivable, net |  | Level 3 |  |  | 8,941,585 |  |  | 9,656,912 |  |  | 8,307,719 |  |  | 8,972,337
Loans/leases receivable, net |  | Level 2 |  |  | 3,683,965,349 |  |  | 3,639,329,000 |  |  | 2,921,821,953 |  |  | 2,892,963,000
Interest rate caps |  | Level 2 |  |  | 458,812 |  |  | 458,812 |  |  | 506,700 |  |  | 506,700
Interest rate swaps - assets |  | Level 2 |  |  | 22,195,713 |  |  | 22,195,713 |  |  | 4,397,238 |  |  | 4,397,238
Deposits: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nonmaturity deposits |  | Level 2 |  |  | 3,002,326,538 |  |  | 3,002,326,538 |  |  | 2,670,583,178 |  |  | 2,670,583,178
Time deposits |  | Level 2 |  |  | 974,704,036 |  |  | 968,906,000 |  |  | 596,071,878 |  |  | 591,772,000
Short-term borrowings |  | Level 2 |  |  | 28,774,157 |  |  | 28,774,157 |  |  | 13,993,122 |  |  | 13,993,122
FHLB advances |  | Level 2 |  |  | 266,492,039 |  |  | 265,926,000 |  |  | 192,000,000 |  |  | 192,115,000
Other borrowings |  | Level 2 |  |  | 72,032,318 |  |  | 72,703,000 |  |  | 66,000,000 |  |  | 66,520,000
Junior subordinated debentures |  | Level 2 |  |  | 37,670,043 |  |  | 29,992,198 |  |  | 37,486,487 |  |  | 29,253,624
Interest rate swaps - liabilities |  | Level 2 |  |  | 23,346,887 |  |  | 23,346,887 |  |  | 4,397,238 |  |  | 4,397,238

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- Definition Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19279-110258 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2C -URI http://asc.fasb.org/extlink&oid=99377789&loc=SL7498348-110258 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19190-110258 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19190-110258 + Details
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