EQUITY STRUCTURE AND ACCOUNTS (Details) $ / shares in Units, $ in Thousands							1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 01, 2016 $ / shares	Mar. 01, 2016 $ / shares	Jan. 21, 2016 USD ($) $ / shares shares	Jun. 08, 2015 $ / shares	Mar. 12, 2015 $ / shares	Feb. 11, 2014 USD ($)	Feb. 10, 2014 $ / shares	Jun. 30, 2016 $ / shares	Jun. 30, 2015 $ / shares	Jun. 30, 2016 USD ($) Class_of_Stock Vote $ / shares shares	Jun. 30, 2015 $ / shares	Dec. 31, 2015 USD ($) shares
Class of Stock [Line Items]
Number of classes of common stock | Class_of_Stock										2
Dividends paid | $										$ 34,885		$ 57,390
Costs directly attributable to the Company's IPO | $						$ 20,500
Series REIT LP Units
Class of Stock [Line Items]
Exchange of noncontrolling interest for common stock (in shares)										2,077,764
Series TRS LP Units
Class of Stock [Line Items]
Exchange of noncontrolling interest for common stock (in shares)										2,077,764
Common Units
Class of Stock [Line Items]
Second cash distributions to partners (as a percent)							20.00%
Second cash distributions after completion of second distribution (as a percent)							20.00%
Series A participating preferred units
Class of Stock [Line Items]
Second cash distributions to participating preferred units (as a percent)							80.00%
Specified amount up to which second distribution to participating preferred units required (in dollars per unit) | $ / shares							$ 124
Series A and Series B participating preferred units
Class of Stock [Line Items]
Second cash distributions after completion of second distribution (as a percent)							80.00%
Class A common stock
Class of Stock [Line Items]
Number of votes per share | Vote										1
Dividends paid | $			$ 15,500
Dividends, share-based compensation stock value | $			$ 500
Common stock issued as dividends (in shares)			5,607,762
Common stock equivalent dividends paid | $			$ 64,100
Dividends per share of common stock (in dollars per share) | $ / shares	$ 0.275	$ 0.275	$ 1.45	$ 0.25	$ 0.25			$ 0.275	$ 0.25	$ 0.55	$ 0.5
Common stock, dividends, weighted average price per share | $ / shares			$ 11.43
Class A common stock | Common Stock
Class of Stock [Line Items]
Exchange of noncontrolling interest for common stock (in shares)										(2,077,764)		(3,586,000)
Class B common stock
Class of Stock [Line Items]
Number of votes per share | Vote										1
Common stock issued as dividends (in shares)			4,468,031
Class B common stock | Common Stock
Class of Stock [Line Items]
Exchange of noncontrolling interest for common stock (in shares)										2,077,764		3,586,000
Series REIT LP Units
Class of Stock [Line Items]
Common stock issued as dividends (in shares)			10,075,793