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CONVERTIBLE SENIOR NOTES (Details) - USD ($) $ in Thousands |  | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jul. 27, 2010 | Dec. 31, 2014 | Jul. 09, 2014 | Dec. 31, 2015 | Dec. 31, 2013
Debt |  |  |  |  |
Non-cash deferred financing amortization costs included in interest expense |  | $ 845 |  | $ 2,379 |
Predecessor |  |  |  |  |
Debt |  |  |  |  |
Non-cash interest expense recognized |  |  | $ 1,592 |  | $ 4,963
Non-cash deferred financing amortization costs included in interest expense |  |  | 4,461 |  | $ 9,116
Predecessor | 2010 Notes |  |  |  |  |
Debt |  |  |  |  |
Proceeds from convertible debt | $ 125,000 |  |  |  |
Interest rate on convertible notes (as a percent) | 5.00% |  |  |  |
Interest expense, including amortization of discount not recorded |  |  | $ 2,522 |  |
Effective interest rate on liability component (as a percent) |  |  | 10.00% |  | 10.00%
Cash interest expense recognized |  |  | $ 1,886 |  | $ 6,250
Non-cash interest expense recognized |  |  | 1,592 |  | 4,963
Non-cash deferred financing amortization costs included in interest expense |  |  | $ 216 |  | $ 720

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