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Fair Value Disclosures - Carrying Amount and Estimated Fair Value of Financial Instruments (Details) - USD ($) | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Assets: |  |
Securities available-for-sale, at fair value | $ 156,577,182 | $ 151,944,567
Restricted investments | 8,272,600 | 6,430,700
Liabilities: |  |
Noninterest-bearing demand deposits | 301,317,854 | 220,520,287
Interest-bearing demand deposits | 246,942,432 | 231,643,508
Time deposits | 535,879,278 | 442,774,094
Level 1 [Member] |  |
Assets: |  |
Cash and cash equivalents | 170,235,000 | 113,027,000
Securities available-for-sale, at fair value | 0 | 0
Level 2 [Member] |  |
Assets: |  |
Securities available-for-sale, at fair value | 156,577,000 | 151,944,000
Liabilities: |  |
Noninterest-bearing demand deposits | 301,318,000 | 220,520,000
Interest-bearing demand deposits | 246,942,000 | 231,644,000
Money Market and Savings deposits | 632,518,000 | 543,645,000
Time deposits | 537,006,000 | 443,547,000
Securities sold under agreements to repurchase | 18,635,000 | 24,055,000
Federal Home Loan Bank advances and other borrowings | 72,040,000 | 43,600,000
Level 3 [Member] |  |
Assets: |  |
Securities available-for-sale, at fair value | 0 | 0
Loans, net | 1,569,916,000 | 1,292,303,000
Carrying Amount [Member] |  |
Assets: |  |
Cash and cash equivalents | 170,235,000 | 113,027,000
Securities available-for-sale, at fair value | 156,577,000 | 151,944,000
Restricted investments | 8,273,000 | 6,431,000
Loans, net | 1,568,361,000 | 1,317,398,000
Liabilities: |  |
Noninterest-bearing demand deposits | 301,318,000 | 220,520,000
Interest-bearing demand deposits | 246,942,000 | 231,644,000
Money Market and Savings deposits | 632,518,000 | 543,645,000
Time deposits | 535,879,000 | 442,774,000
Securities sold under agreements to repurchase | 18,635,000 | 24,055,000
Federal Home Loan Bank advances and other borrowings | 72,040,000 | 43,600,000
Estimated Fair Value [Member] |  |
Assets: |  |
Cash and cash equivalents | 170,235,000 | 113,027,000
Securities available-for-sale, at fair value | 156,577,000 | 151,944,000
Loans, net | 1,569,916,000 | 1,292,303,000
Liabilities: |  |
Noninterest-bearing demand deposits | 301,318,000 | 250,520,000
Interest-bearing demand deposits | 246,942,000 | 231,644,000
Money Market and Savings deposits | 632,518,000 | 543,645,000
Time deposits | 537,006,000 | 443,547,000
Securities sold under agreements to repurchase | 18,635,000 | 24,055,000
Federal Home Loan Bank advances and other borrowings | $ 72,040,000 | $ 43,600,000

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109979856&loc=d3e26610-111562 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 + Details
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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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- Definition Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -URI http://asc.fasb.org/subtopic&trid=2196772 + Details
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