DEBT - Schedule of Future Principal Payments (Details) $ in Thousands	Jun. 30, 2018 USD ($)
Future Principal Payments on Debt
2018 (Six months ending December 31, 2018)	$ 1,646
2019	3,377
2020	3,483
2021	3,592
2022	174,390
Thereafter	484,447
Total Debt	670,935
Mortgages Payable
Future Principal Payments on Debt
2018 (Six months ending December 31, 2018)	0
2019	0
2020	0
2021	0
2022	679
Thereafter	415,621
Total Debt	416,300
Secured Borrowings Principal
Future Principal Payments on Debt
2018 (Six months ending December 31, 2018)	350
2019	725
2020	760
2021	797
2022	835
Thereafter	16,495
Total Debt	19,962
Other Debt
Future Principal Payments on Debt
2018 (Six months ending December 31, 2018)	1,296
2019	2,652
2020	2,723
2021	2,795
2022	172,876
Thereafter	52,331
Total Debt	$ 234,673

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: 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))
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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 3
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-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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