STOCK BASED COMPENSATION PLANS - Nonvested Shares Outstanding (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Restricted Stock
Number of Shares Nonvested Other than Options [Roll Forward]
Outstanding at beginning period			1,384,439
Granted	0	0	726,327	1,687,513
Vested			(242,285)
Forfeited			(188,054)
Outstanding at ending period	1,680,427		1,680,427
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
December 31, 2014			0
Granted	0	0	670,256	0
Exercised			0
Forfeited			(69,070)
Expired			0
September 30, 2015	601,186		601,186
September 30, 2015	0		0
LP Units
Number of Shares Nonvested Other than Options [Roll Forward]
Outstanding at beginning period			8,063
Granted			0
Vested			(6,047)
Forfeited			0
Outstanding at ending period	2,016		2,016