Revolving Term Credit Facilities and Debt - Additional Information - ASV Loan Facilities (Detail) - Facility |
12 Months Ended | |
|---|---|---|
Dec. 19, 2014 |
Dec. 31, 2015 |
|
| Line of Credit Facility [Line Items] | ||
| Pledge of equity interest | 100.00% | |
| ASV Loan Facilities [Member] | ||
| Line of Credit Facility [Line Items] | ||
| Number of loan facilities | 2 |