Fair Value of Financial Instruments (Details) - Fair Value, Measurements, Nonrecurring - Senior Secured Notes - Level 2 - USD ($) $ in Thousands |
Mar. 31, 2016 |
Mar. 31, 2015 |
|---|---|---|
| First Lien Notes | Carrying Amount | ||
| Fair Value Disclosure | ||
| Debt | $ 214,277 | $ 275,175 |
| First Lien Notes | Fair Value | ||
| Fair Value Disclosure | ||
| Debt | 221,241 | 282,742 |
| Second Lien Notes | Carrying Amount | ||
| Fair Value Disclosure | ||
| Debt | 0 | 2,198 |
| Second Lien Notes | Fair Value | ||
| Fair Value Disclosure | ||
| Debt | 0 | 2,337 |
| New Second Lien Notes | Carrying Amount | ||
| Fair Value Disclosure | ||
| Debt | 164,441 | 32,196 |
| New Second Lien Notes | Fair Value | ||
| Fair Value Disclosure | ||
| Debt | $ 152,930 | $ 33,655 |