SUBSEQUENT EVENTS (Details)			3 Months Ended
		May. 12, 2016 USD ($)	Mar. 31, 2016 USD ($)
Wells Fargo Bank, National Association [Member] | Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Commitment fee			0.50%
Maximum borrowing capacity			$ 350,000,000
Wells Fargo Bank, National Association [Member] | Revolving Credit Facility [Member] | Minimum [Member]
Subsequent Event [Line Items]
Commitment fee			0.20%
Wells Fargo Bank, National Association [Member] | Revolving Credit Facility [Member] | Maximum [Member]
Subsequent Event [Line Items]
Commitment fee			0.50%
Subsequent Event [Member] | Minimum [Member]
Consolidated Fixed Charge Coverage Ratio Covenant [Abstract]
June 30, 2015 through December 31, 2015		1.15
January 1, 2016 through March 31, 2016	[1]
April 1, 2016 through December 31, 2016		1.15
March 31, 2017 and thereafter		1.25
Asset Coverage Ratio Covenant [Abstract]
March 31, 2016 through July 31, 2016		0.90
August 1, 2016 and thereafter		1.00
Subsequent Event [Member] | Maximum [Member]
Consolidated Leverage Ratio Covenant [Abstract]
June 30, 2015 through December 31, 2015		4.25
January 1, 2016 through March 31, 2016	[1]
April 1, 2016 through September 30, 2016		4.25
October 1, 2016 through December 31, 2016		4.00
January 1, 2017 through June 30, 2017		3.75
July 1, 2017 through December 31, 2017		3.50
January 1, 2018 and thereafter		3.25
Subsequent Event [Member] | Wells Fargo Bank, National Association [Member] | Revolving Credit Facility [Member]
Subsequent Event [Line Items]
Increase (decrease) in basis spread on base rate		0.50%
Maximum borrowing capacity		$ 250,000,000
Decrease in borrowing capacity		$ (100,000,000)
Subsequent Event [Member] | Pricing Level One [Member]
Subsequent Event [Line Items]
Commitment fee		0.20%
Leverage ratio		1.50%
Subsequent Event [Member] | Pricing Level One [Member] | LIBOR Rate & CDOR Rate [Member]
Subsequent Event [Line Items]
Base rate		1.75%
Subsequent Event [Member] | Pricing Level One [Member] | Base Rate & Canadian Base Rate [Member]
Subsequent Event [Line Items]
Base rate		0.75%
Subsequent Event [Member] | Pricing Level Two [Member]
Subsequent Event [Line Items]
Commitment fee		0.25%
Subsequent Event [Member] | Pricing Level Two [Member] | Minimum [Member]
Subsequent Event [Line Items]
Leverage ratio		1.50%
Subsequent Event [Member] | Pricing Level Two [Member] | Maximum [Member]
Subsequent Event [Line Items]
Leverage ratio		2.00%
Subsequent Event [Member] | Pricing Level Two [Member] | LIBOR Rate & CDOR Rate [Member]
Subsequent Event [Line Items]
Base rate		2.00%
Subsequent Event [Member] | Pricing Level Two [Member] | Base Rate & Canadian Base Rate [Member]
Subsequent Event [Line Items]
Base rate		1.00%
Subsequent Event [Member] | Pricing Level Three [Member]
Subsequent Event [Line Items]
Commitment fee		0.30%
Subsequent Event [Member] | Pricing Level Three [Member] | Minimum [Member]
Subsequent Event [Line Items]
Leverage ratio		2.00%
Subsequent Event [Member] | Pricing Level Three [Member] | Maximum [Member]
Subsequent Event [Line Items]
Leverage ratio		2.50%
Subsequent Event [Member] | Pricing Level Three [Member] | LIBOR Rate & CDOR Rate [Member]
Subsequent Event [Line Items]
Base rate		2.25%
Subsequent Event [Member] | Pricing Level Three [Member] | Base Rate & Canadian Base Rate [Member]
Subsequent Event [Line Items]
Base rate		1.25%
Subsequent Event [Member] | Pricing Level Four [Member]
Subsequent Event [Line Items]
Commitment fee		0.35%
Subsequent Event [Member] | Pricing Level Four [Member] | Minimum [Member]
Subsequent Event [Line Items]
Leverage ratio		2.50%
Subsequent Event [Member] | Pricing Level Four [Member] | Maximum [Member]
Subsequent Event [Line Items]
Leverage ratio		3.00%
Subsequent Event [Member] | Pricing Level Four [Member] | LIBOR Rate & CDOR Rate [Member]
Subsequent Event [Line Items]
Base rate		2.50%
Subsequent Event [Member] | Pricing Level Four [Member] | Base Rate & Canadian Base Rate [Member]
Subsequent Event [Line Items]
Base rate		1.50%
Subsequent Event [Member] | Pricing Level Five [Member]
Subsequent Event [Line Items]
Commitment fee		0.40%
Subsequent Event [Member] | Pricing Level Five [Member] | Minimum [Member]
Subsequent Event [Line Items]
Leverage ratio		3.00%
Subsequent Event [Member] | Pricing Level Five [Member] | Maximum [Member]
Subsequent Event [Line Items]
Leverage ratio		3.50%
Subsequent Event [Member] | Pricing Level Five [Member] | LIBOR Rate & CDOR Rate [Member]
Subsequent Event [Line Items]
Base rate		2.75%
Subsequent Event [Member] | Pricing Level Five [Member] | Base Rate & Canadian Base Rate [Member]
Subsequent Event [Line Items]
Base rate		1.75%
Subsequent Event [Member] | Pricing Level Six [Member]
Subsequent Event [Line Items]
Commitment fee		0.45%
Subsequent Event [Member] | Pricing Level Six [Member] | Minimum [Member]
Subsequent Event [Line Items]
Leverage ratio		3.50%
Subsequent Event [Member] | Pricing Level Six [Member] | Maximum [Member]
Subsequent Event [Line Items]
Leverage ratio		4.00%
Subsequent Event [Member] | Pricing Level Six [Member] | LIBOR Rate & CDOR Rate [Member]
Subsequent Event [Line Items]
Base rate		3.00%
Subsequent Event [Member] | Pricing Level Six [Member] | Base Rate & Canadian Base Rate [Member]
Subsequent Event [Line Items]
Base rate		2.00%
Subsequent Event [Member] | Pricing Level Seven [Member]
Subsequent Event [Line Items]
Commitment fee		0.50%
Leverage ratio		4.00%
Subsequent Event [Member] | Pricing Level Seven [Member] | LIBOR Rate & CDOR Rate [Member]
Subsequent Event [Line Items]
Base rate		3.25%
Subsequent Event [Member] | Pricing Level Seven [Member] | Base Rate & Canadian Base Rate [Member]
Subsequent Event [Line Items]
Base rate		2.25%

[1] none