Fair Value of Financial Instruments (Details) - Fair Value, Measurements, Nonrecurring - Senior Secured Notes - Level 2 - USD ($) $ in Thousands |
Sep. 30, 2015 |
Mar. 31, 2015 |
|---|---|---|
| First Lien Notes | Carrying Amount | ||
| Fair Value Disclosure | ||
| Debt | $ 273,175 | $ 275,175 |
| First Lien Notes | Fair Value | ||
| Fair Value Disclosure | ||
| Debt | 281,370 | 282,742 |
| Second Lien Notes | Carrying Amount | ||
| Fair Value Disclosure | ||
| Debt | 2,198 | 2,198 |
| Second Lien Notes | Fair Value | ||
| Fair Value Disclosure | ||
| Debt | 2,288 | 2,337 |
| New Second Lien Notes | Carrying Amount | ||
| Fair Value Disclosure | ||
| Debt | 32,680 | 32,196 |
| New Second Lien Notes | Fair Value | ||
| Fair Value Disclosure | ||
| Debt | $ 23,489 | $ 33,655 |