FINANCIAL INSTRUMENTS - Offsetting Derivative Liabilities (Details) $ in Thousands	Dec. 31, 2016 USD ($)
Offsetting of Derivative Assets
Gross Amounts of Recognized Assets	$ 18,033
Gross Amounts Offset in the Balance Sheet	1,552
Net amounts of assets presented in the balance sheet	19,585
Financial Instruments	(1,552)
Net Amount	18,033
Offsetting of Derivative Liabilities
Gross Amounts Offset in the Balance Sheet	(1,552)
Net amounts of liabilities presented in the balance sheet	(1,552)
Financial Instruments	1,552
Interest rate swap | Counterparty 1
Offsetting of Derivative Assets
Gross Amounts of Recognized Assets	15,577
Gross Amounts Offset in the Balance Sheet	1,314
Net amounts of assets presented in the balance sheet	16,891
Financial Instruments	(1,314)
Net Amount	15,577
Offsetting of Derivative Liabilities
Gross Amounts Offset in the Balance Sheet	(1,314)
Net amounts of liabilities presented in the balance sheet	(1,314)
Financial Instruments	1,314
Interest rate swap | Counterparty 2
Offsetting of Derivative Assets
Gross Amounts of Recognized Assets	975
Gross Amounts Offset in the Balance Sheet	80
Net amounts of assets presented in the balance sheet	1,055
Financial Instruments	(80)
Net Amount	975
Offsetting of Derivative Liabilities
Gross Amounts Offset in the Balance Sheet	(80)
Net amounts of liabilities presented in the balance sheet	(80)
Financial Instruments	80
Interest rate swap | Counterparty 3
Offsetting of Derivative Assets
Gross Amounts of Recognized Assets	1,481
Gross Amounts Offset in the Balance Sheet	158
Net amounts of assets presented in the balance sheet	1,639
Financial Instruments	(158)
Net Amount	1,481
Offsetting of Derivative Liabilities
Gross Amounts Offset in the Balance Sheet	(158)
Net amounts of liabilities presented in the balance sheet	(158)
Financial Instruments	$ 158