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CONVERTIBLE SENIOR NOTES (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jul. 27, 2010 | Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Debt |  |  |  |  |
Non-cash deferred financing amortization costs included in interest expense |  | $ 564 |  | $ 1,051 |
Predecessor |  |  |  |  |
Debt |  |  |  |  |
Non-cash interest expense recognized |  |  |  |  | $ 1,592
Non-cash deferred financing amortization costs included in interest expense |  |  | $ 2,071 |  | $ 4,291
Predecessor | 2010 Notes |  |  |  |  |
Debt |  |  |  |  |
Proceeds from convertible debt | $ 125,000 |  |  |  |
Interest rate on convertible notes (as a percent) | 5.00% |  |  |  |
Effective interest rate on liability component (as a percent) |  |  | 10.00% |  | 10.00%
Cash interest expense recognized |  |  | $ 345 |  | $ 1,886
Non-cash interest expense recognized |  |  | 293 |  | 1,592
Non-cash deferred financing amortization costs included in interest expense |  |  | $ 39 |  | $ 216

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