Long Term Debt (Detail) - USD ($) $ in Thousands |
Dec. 31, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Debt Instrument [Line Items] | ||
| Long-term debt including current portion | $ 100,000 | $ 116,400 |
| Current portion of long-term obligations | (5,000) | (12,000) |
| Total | 95,000 | 104,400 |
| Term Loan [Member] | ||
| Debt Instrument [Line Items] | ||
| Long-term debt including current portion | 0 | 33,000 |
| Revolving Credit Facilities [Member] | ||
| Debt Instrument [Line Items] | ||
| Long-term debt including current portion | 0 | 15,000 |
| Second Lien Credit Agreement Term Loan [Member] | ||
| Debt Instrument [Line Items] | ||
| Long-term debt including current portion | 0 | 70,000 |
| Discount on long-term debt | 0 | (1,600) |
| One Hundred Million Term Loan [Member] | ||
| Debt Instrument [Line Items] | ||
| Long-term debt including current portion | $ 100,000 | $ 0 |