FINANCIAL INSTRUMENTS - Offsetting Derivative Liabilities (Details) $ in Thousands	Jun. 30, 2016 USD ($)
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	$ 15,507
Net amounts of liabilities presented in the balance sheet	15,507
Net amount	15,507
Interest rate swap | Counterparty 1
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	13,142
Net amounts of liabilities presented in the balance sheet	13,142
Net amount	13,142
Interest rate swap | Counterparty 2
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	861
Net amounts of liabilities presented in the balance sheet	861
Net amount	861
Interest rate swap | Counterparty 3
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	1,504
Net amounts of liabilities presented in the balance sheet	1,504
Net amount	$ 1,504