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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Investments in Real Estate Partnerships (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) investment
Accounting Policies [Abstract] |  |  |
Limited partner interest (as a percent) |  | 99.00% |
Number of investments accounted for under the proportional amortization method | investment |  |  | 1
Recorded investment in real estate partnerships | $ 4,416 | $ 4,909 |
Investments accounted for under proportional amortization method | 1,776 | 1,993 |
Losses accounted for under the equity method | 277 | 350 | $ 384
Losses on investments accounted for under proportional amortization method | 217 | 191 | 22,000
Federal tax credits | $ 1,010 | $ 736 | $ 475

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- Definition Investment in real estate partnership. + References No definition available. + Details
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- Definition Investments In Affordable Housing Projects, Proportional Amortization Method + References No definition available. + Details
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- Definition Percentage of limited partner interest. + References No definition available. + Details
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- Definition Amount of affordable housing tax credits and other tax benefits recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 740 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=64813897&loc=SL49122993-202985 + Details
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- Definition Amount of investment in qualified affordable housing projects. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 740 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64813897&loc=SL49122993-202985 + Details
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- Definition Amount, before tax, of net income (loss) derived from real estate held for development and sale, and related investments. + References No definition available. + Details
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