Schedule II - Valuation and Qualifying Accounts (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Allowance for Doubtful Receivables [Member] | |||
| Valuation And Qualifying Accounts Disclosure [Line Items] | |||
| Valuation and qualifying accounts, beginning balance | $ 706 | $ 279 | $ 300 |
| Charged to costs and expenses | 226 | 403 | 157 |
| Charged to other accounts | 301 | 24 | (51) |
| Deductions | (127) | ||
| Valuation and qualifying accounts, ending balance | 1,233 | 706 | 279 |
| Deferred Tax Asset Valuation Allowance [Member] | |||
| Valuation And Qualifying Accounts Disclosure [Line Items] | |||
| Valuation and qualifying accounts, beginning balance | 12,913 | 11,235 | 12,204 |
| Charged to costs and expenses | 7,287 | 1,718 | (1,048) |
| Charged to other accounts | (40) | 21 | |
| Deductions | 58 | ||
| Valuation and qualifying accounts, ending balance | $ 20,200 | $ 12,913 | $ 11,235 |