Schedule II - Consolidated Valuation and Qualifying Accounts (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Allowance for doubtful accounts | |||
| Valuation And Qualifying Accounts Disclosure [Line Items] | |||
| Balance at Beginning of Period | $ 3,040 | $ 3,100 | $ 3,199 |
| Charged/(Credited) to Expense | 815 | 492 | 450 |
| Other Adjustments | 79 | 56 | 331 |
| Deductions | (1,384) | (608) | (880) |
| Balance at End of Period | 2,550 | 3,040 | 3,100 |
| Deferred tax valuation allowance | |||
| Valuation And Qualifying Accounts Disclosure [Line Items] | |||
| Balance at Beginning of Period | 1,206 | 1,361 | 1,432 |
| Charged/(Credited) to Expense | $ (1,206) | (155) | (71) |
| Balance at End of Period | $ 1,206 | $ 1,361 | |