Long-term Debt - Fair Value of Debt Instruments (Detail) - USD ($) $ in Thousands |
Dec. 31, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Debt Instrument [Line Items] | ||
| Total fair value of debt instruments | $ 98,513 | $ 271,384 |
| 2014 Term Loan | ||
| Debt Instrument [Line Items] | ||
| Total fair value of debt instruments | 98,044 | 270,000 |
| Revolver borrowings | ||
| Debt Instrument [Line Items] | ||
| Total fair value of debt instruments | 0 | 0 |
| Capital lease obligations | ||
| Debt Instrument [Line Items] | ||
| Total fair value of debt instruments | $ 469 | $ 1,384 |