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SUBSEQUENT EVENTS (Details) - USD ($) $ / shares in Units, $ in Thousands												12 Months Ended
	Jun. 15, 2017	Mar. 23, 2017	Mar. 19, 2017	Feb. 16, 2017	Feb. 09, 2017	Jan. 09, 2017	Jan. 04, 2017	May 18, 2016	Feb. 17, 2016	Jul. 29, 2015	Jul. 13, 2015	Dec. 31, 2016	Dec. 31, 2015	Jun. 26, 2015
Series A Preferred Stock
Subsequent Events
Preferred stock par value												$ 0.01	$ 0.01
2015 EIP Plan
Subsequent Events
Aggregate number of shares of common stock available for awards												400,000		4,000,000
Board of Directors | 2015 EIP Plan | Restricted Stock Units
Subsequent Events
Granted (in shares)								666,664		58,215	16,188	66,666	7,440
John C. Wobensmith | 2015 EIP Plan
Subsequent Events
Granted (in shares)									204,081
John C. Wobensmith | Amended Employment Agreement | Restricted Stock Units
Subsequent Events
Granted (in shares)		292,398
Subsequent event | Series A Preferred Stock
Subsequent Events
Preferred stock par value							$ 0.01
Preferred stock outstanding (in shares)							27,061,856
Common stock authorized for conversion of preferred stock							27,061,856
Preferred stock converted into common stock							27,061,856
Subsequent event | Amended And Restated 2015 Plan
Subsequent Events
Aggregate number of shares of common stock available for awards		2,750,000
Subsequent event | John C. Wobensmith | Amended Employment Agreement
Subsequent Events
Cash bonus for 2016		$ 600
Vesting percentage of awards		33.00%
Vesting period of awards		3 years
Subsequent event | John C. Wobensmith | Amended Employment Agreement | Equity Option
Subsequent Events
Options to purchase (in shares)		133,000
Exercise price (in dollars per share)		$ 11.13
Subsequent event | Nonemployee Directors | Amended And Restated 2015 Plan
Subsequent Events
Maximum annual limit for grants (in shares)		500,000
Subsequent event | Other Individuals | Amended And Restated 2015 Plan
Subsequent Events
Maximum annual limit for grants (in shares)		1,000,000
Subsequent event | Genco Carrier
Subsequent Events
Sale of assets				$ 3,560
Brokerage commission				$ 92
Subsequent event | Genco Reliance
Subsequent Events
Sale of assets					$ 3,500
Broker commission (as a percent)					3.50%
Subsequent event | Genco Wisdom
Subsequent Events
Sale of assets						$ 3,250
Broker commission (as a percent)						3.50%
Subsequent event | Forecast | Genco Prosperity | Board of Directors
Subsequent Events
Sale of assets	$ 3,050
Broker commission (as a percent)	3.50%
Subsequent event | Forecast | Genco Success | Board of Directors
Subsequent Events
Sale of assets			$ 2,800
Broker commission (as a percent)			3.00%

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