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FINANCIAL INSTRUMENTS - Fair Values (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015
Derivatives, Fair Value [Line Items] |  |
Debt Issuance Costs, Net | $ 26,308 | $ 42,154
Carrying Value and Estimated Fair Values |  |
Gross amounts presented in the consolidated balance sheet, Total asset derivatives | 5,022 | 5,330
Gross amounts not offset in the consolidated balance sheet subject to netting agreements | (1,351) | (216)
Net amount, Total asset derivatives | 3,671 | 5,114
Gross amounts presented in the consolidated balance sheet, Total liability derivatives | 1,470 | 4,597
Net amount, Total liability derivatives | 119 | 4,381
Cash collateral | $ 415,860 | 408,563
Share Repurchase Forward Swap |  |
Carrying Value and Estimated Fair Values |  |
Collateral required under share repurchase agreement, percentage of total purchase price | 20.00% |
Cash collateral | $ 70,000 |
Interest rate swap |  |
Carrying Value and Estimated Fair Values |  |
Derivative asset | 5,022 | 5,330
Interest rate swap | Not Designated as Hedging Instrument |  |
Carrying Value and Estimated Fair Values |  |
Derivative asset | 5,022 | 5,330
Derivative liability | 1,470 | 4,597
Interest rate swap | Cash flow hedging | Designated as Hedging Instrument |  |
Carrying Value and Estimated Fair Values |  |
Notional value | 1,250,000 | 1,250,000
Equity Swap | Not Designated as Hedging Instrument |  |
Carrying Value and Estimated Fair Values |  |
Derivative liability | 56,763 | 81,581
Currency swap |  |
Carrying Value and Estimated Fair Values |  |
Derivative liability | 59,226 | 86,178
Currency swap | Not Designated as Hedging Instrument |  |
Carrying Value and Estimated Fair Values |  |
Derivative liability | 993 | 0
Earn-Out Units |  |
Carrying Value and Estimated Fair Values |  |
Derivative asset | 15,000 | 0
Earn-Out Units | Not Designated as Hedging Instrument |  |
Carrying Value and Estimated Fair Values |  |
Derivative asset | 15,000 | 15,000
Level 1 | Carrying Value |  |
Carrying Value and Estimated Fair Values |  |
Cash and cash equivalents | 224,190 | 105,235
Restricted cash and short-term deposits | 415,860 | 408,563
Level 1 | Fair Value |  |
Carrying Value and Estimated Fair Values |  |
Cash and cash equivalents | 224,190 | 105,235
Restricted cash and short-term deposits | 415,860 | 408,563
Level 3 | Carrying Value |  |
Carrying Value and Estimated Fair Values |  |
Cost method investments | 7,347 | 7,347
Level 3 | Fair Value |  |
Carrying Value and Estimated Fair Values |  |
Cost method investments | 7,347 | 7,347
Fair Value, Inputs, Level 2 [Member] | Carrying Value |  |
Carrying Value and Estimated Fair Values |  |
Short-term loans receivable | 0 | 6,375
Current portion of long-term debt | 484,705 | 501,618
Long-term debt - convertible bond | 218,851 | 243,369
Long-term debt | 1,124,105 | 1,133,074
Fair Value, Inputs, Level 2 [Member] | Carrying Value | Interest rate swap |  |
Carrying Value and Estimated Fair Values |  |
Derivative asset | 5,022 | 5,330
Derivative liability | 1,470 | 4,597
Fair Value, Inputs, Level 2 [Member] | Carrying Value | Equity Swap |  |
Carrying Value and Estimated Fair Values |  |
Derivative liability | 56,763 | 81,581
Fair Value, Inputs, Level 2 [Member] | Carrying Value | Currency swap |  |
Carrying Value and Estimated Fair Values |  |
Foreign Currency Fair Value Hedge Liability at Fair Value | 993 | 0
Fair Value, Inputs, Level 2 [Member] | Carrying Value | Earn-Out Units |  |
Carrying Value and Estimated Fair Values |  |
Derivative asset | 15,000 | 0
Fair Value, Inputs, Level 2 [Member] | Fair Value |  |
Carrying Value and Estimated Fair Values |  |
Short-term loans receivable | 0 | 6,375
Current portion of long-term debt | 484,705 | 501,618
Long-term debt - convertible bond | 219,428 | 231,945
Long-term debt | 1,124,105 | 1,133,074
Fair Value, Inputs, Level 2 [Member] | Fair Value | Interest rate swap |  |
Carrying Value and Estimated Fair Values |  |
Derivative asset | 5,022 | 5,330
Derivative liability | 1,470 | 4,597
Fair Value, Inputs, Level 2 [Member] | Fair Value | Equity Swap |  |
Carrying Value and Estimated Fair Values |  |
Derivative liability | 56,763 | 81,581
Fair Value, Inputs, Level 2 [Member] | Fair Value | Earn-Out Units |  |
Carrying Value and Estimated Fair Values |  |
Derivative asset | $ 15,000 | $ 0

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