DEBT - Schedule of Maturities of Debt (Details) $ in Thousands	Sep. 30, 2015 USD ($)
Debt Instrument [Line Items]
October 1, 2015 through December 31, 2015	$ 935
2016	3,996
2017	4,129
2018	408,267
2019	4,409
Thereafter	917,985
Total	1,339,721
Mortgage Indebtedness [Member]
Debt Instrument [Line Items]
October 1, 2015 through December 31, 2015	935
2016	3,996
2017	4,129
2018	4,267
2019	4,409
Thereafter	150,872
Total	168,608
Senior Notes [Member]
Debt Instrument [Line Items]
October 1, 2015 through December 31, 2015	0
2016	0
2017	0
2018	0
2019	0
Thereafter	700,000
Total	700,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
October 1, 2015 through December 31, 2015	0
2016	0
2017	0
2018	204,000
2019	0
Thereafter	0
Total	204,000
Term Loans [Member]
Debt Instrument [Line Items]
October 1, 2015 through December 31, 2015	0
2016	0
2017	0
2018	200,000
2019	0
Thereafter	67,113
Total	$ 267,113