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BORROWINGS (Tables) | 12 Months Ended
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Dec. 31, 2017
Debt Disclosure [Abstract] |
Schedule of Federal Home Loan Bank Borrowings | Advances payable to the Federal Home Loan Bank as of December 31 are summarized as follows:
|  | 2017 |  | 2016
|  |  |  | Weighted |  |  |  | Weighted
|  |  |  | Average |  |  |  | Average
|  | Total |  | Contractual |  | Total |  | Contractual
|  | Outstanding |  | Rate |  | Outstanding |  | Rate
|  | (Dollars in thousands)
Stated Maturity |  |  |  |  |  |  |  |
2017 |  | $ | — |  |  | — | % |  | $ | 50,000 |  |  | 2.43 | %
2018 |  | 52,475 |  |  | 1.58 | % |  | — |  |  | — | %
Subtotal |  | 52,475 |  |  | 1.58 | % |  | 50,000 |  |  | 2.43 | %
Amortizing advances |  | 789 |  |  |  |  | 819 |  |  |
Total Federal Home Loan Bank Advances |  | $ | 53,264 |  |  |  |  | $ | 50,819 |  |  |
Schedule of Underlying Assets of Repurchase Agreements when Amount of Repurchase Agreements Exceeds 10 Percent of Assets [Table Text Block] | The table below sets forth the remaining contractual maturity of the Company’s repurchase agreements allocated by source of collateral at the dates indicated:
| December 31
| 2017 |  | 2016
| (Dollars in thousands)
Sources of Collateral |
U.S. government agency securities | $ | 16,867 |  |  | $ | 20,233 |
Agency mortgage-backed securities | 51,273 |  |  | 79,079 |
Agency collateralized mortgage obligations | 94,539 |  |  | 77,601 |
Total customer repurchase agreements (1) | $ | 162,679 |  |  | $ | 176,913 |
Schedule of Long-term Borrowings | The following table summarizes long-term debt, net of debt issuances costs, as of the periods indicated:
| December 31
| 2017 |  | 2016
| (Dollars in thousands)
Junior subordinated debentures |  |  |
Capital Trust V | $ | 51,503 |  |  | $ | 51,500 |
Slades Ferry Trust I | 10,229 |  |  | 10,224 |
Central Trust I | 5,258 |  |  | 5,302 |
Central Trust II | 6,083 |  |  | 6,081 |
Subordinated debentures | 34,682 |  |  | 34,635 |
Total long-term debt | $ | 107,755 |  |  | $ | 107,742 |
Information relating to Trust Preferred Securities [Table Text Block] | Information relating to these trust preferred securities are as follows:
Trust | Description of Capital Securities
Capital Trust V | $50.0 million due in 2037, interest at a variable rate of 3 month LIBOR plus 1.48% (3.07% at December 31, 2017),which, effective on January 17, 2017, has been converted to a fixed rate of 2.84% through the use of an interest rate swap. Prior to 2017, this borrowing had been converted to a fixed rate of 6.52%, through the use of an interest rate swap which expired on December 28, 2016. These securities are callable quarterly, until maturity.
Slades Ferry Trust I | $10.0 million due in 2034, bearing interest at a variable rate of 3 month LIBOR plus 2.79% (4.39% at December 31, 2017). These securities are callable quarterly, until maturity.
Central Trust I | $5.1 million due in 2034, bearing interest at a variable rate of 3 month LIBOR plus 2.44% (4.03% at December 31, 2017). These securities are callable quarterly, until maturity.
Central Trust II | $5.9 million due in 2037, bearing interest at a variable rate of 3 month LIBOR plus 1.65% (3.24% at December 31, 2017), beginning in March of 2017. Previously, the interest was at a fixed rate of 7.015%. These securities are callable quarterly, until maturity.
Schedule of Maturities of Borrowings | The following table sets forth the contractual maturities of long-term debt over the next five years:
|  | 2018 |  | 2019 |  | 2020 |  | 2021 |  | 2022 |  | Thereafter |  | Total
|  | (Dollars in thousands)
Junior subordinated debentures |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital trust V |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 51,547 |  |  | $ | 51,547 |
Slades ferry trust I |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 10,310 |  |  | 10,310 |
Central trust I |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 5,258 |  |  | 5,258 |
Central trust II |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 6,083 |  |  | 6,083 |
Subordinated debentures |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 35,000 |  |  | 35,000 |
Total |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 108,198 |  |  | $ | 108,198 |

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- Definition Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer. + 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) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21475-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e),(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 5: 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 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21538-112644 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21506-112644 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399 Reference 9: 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 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21521-112644 + Details
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