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SENIOR AND CONVERTIBLE SENIOR NOTES, NET - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands | Sep. 18, 2012 | Jun. 30, 2016 | Dec. 31, 2015
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Debt Instrument [Line Items] |  |  |  |
Debt issuance costs | [1] |  | $ 9,487 | $ 10,745
Senior Notes [Member] | 1.875% convertible senior notes due 2032 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt instrument, convertible, conversion ratio |  | 0.0171985000 |  |
Debt instrument, convertible, conversion price (in dollars per share) |  | $ 58.14 |  |
Debt instrument, convertible, conversion premium |  | 47.50% |  |
Adjustments for New Accounting Pronouncement [Member] | Senior Notes [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt issuance costs |  |  |  | $ 10,700
[1] | As discussed in Note 1, the adoption of ASU 2015-03 resulted in a retrospective reclassification of our debt costs from Prepaids, other assets and goodwill to Senior and convertible senior notes, net on our December 31, 2015 balance sheet in the amount of $10.7 million.

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