CONCENTRATION OF RISK Derivative Counterparties (Details)	Dec. 31, 2015 USD ($)
Concentration Risk [Line Items]
Fair Value of Derivative Assets	$ 266,046,000
Number of derivative counterparties	1
Canadian Imperial Bank of Commerce
Concentration Risk [Line Items]
Fair Value of Derivative Assets	78,102,000
JPMorgan Chase Bank [Member]
Concentration Risk [Line Items]
Fair Value of Derivative Assets	71,012,000
Natixis
Concentration Risk [Line Items]
Fair Value of Derivative Assets	29,754,000
Wells Fargo Bank
Concentration Risk [Line Items]
Fair Value of Derivative Assets	32,474,000
Bank of Nova Scotia
Concentration Risk [Line Items]
Fair Value of Derivative Assets	49,758,000
Other Lenders in Our Credit Facility
Concentration Risk [Line Items]
Fair Value of Derivative Assets	4,856,000
Various
Concentration Risk [Line Items]
Fair Value of Derivative Assets	$ 90,000	[1]

[1] Represents one counterparty.