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Long-Term Borrowings (Details Narrative) - USD ($) $ in Thousands | Jul. 26, 2016 | Aug. 05, 2014 | Mar. 31, 2018 | Dec. 31, 2017 | Mar. 31, 2017
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Proceeds from issuance of subordinated long-term debt | $ 147,350 | $ 68,800 |  |  |
Subordinated Debt [Member] |  |  |  |  |
Face amount | $ 150,000 | $ 70,000 |  |  |
Debt instrument, interest rate, stated percentage | 5.00% | 5.75% |  |  |
Payments of debt issuance costs | $ 2,600 | $ 1,200 |  |  |
Subordinated Notes, 5.0% [Member] |  |  |  |  |
Debt instrument, interest rate, stated percentage |  |  | 5.00% | 5.00% | 5.00%
Subordinated Notes, 5.75% [Member] |  |  |  |  |
Debt instrument, interest rate, stated percentage |  |  | 5.75% | 5.75% | 5.75%

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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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- Definition The cash inflow from a borrowing where a lender is placed in a lien position behind debt having a higher priority of repayment (senior) in liquidation of the entity's assets or underlying collateral. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3255-108585 + Details
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