Segment Reporting - Summary of Long-Lived Assets (Exclusive of Intangible and Other Assets, Net and Goodwill) Classified by Geographic Location (Detail) - USD ($) $ in Thousands |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Revenues from External Customers and Long-Lived Assets [Line Items] | ||
| Long-lived assets | $ 251,101 | $ 250,909 |
| United States | ||
| Revenues from External Customers and Long-Lived Assets [Line Items] | ||
| Long-lived assets | 170,841 | 168,144 |
| Canada | ||
| Revenues from External Customers and Long-Lived Assets [Line Items] | ||
| Long-lived assets | $ 80,260 | $ 82,765 |