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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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FAIR VALUE OF FINANCIAL INSTRUMENTS - RECURRING (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Nov. 10, 2016	Nov. 04, 2015
Fair value of financial instruments
Floating rate debt	$ 521,215	$ 523,577
Secured Debt \| $400 Million Credit Facility
Fair value of financial instruments
Floating rate debt	399,700	400,000
Face amount of term loan facility	400,000	400,000	$ 400,000
Line of Credit Facility \| $98 Million Credit Facility
Fair value of financial instruments
Floating rate debt	95,271	95,271
Face amount of term loan facility	98,000	98,000		$ 98,000
Carrying Value
Fair value of financial instruments
Cash and cash equivalents	152,511	133,400
Restricted cash	32,594	35,668
Floating rate debt	526,590	524,377
Fair value
Fair value of financial instruments
Cash and cash equivalents	152,511	133,400
Restricted cash	32,594	35,668
Floating rate debt	$ 526,590	$ 524,377