Revolving Term Credit Facilities and Debt - Additional Information - ASV Covenants (Detail) - ASV Loan Facilities [Member] |
12 Months Ended |
|---|---|
|
Dec. 31, 2016
USD ($)
| |
| Line of Credit Facility [Line Items] | |
| Fixed charge coverage ratio covenant | 1.20 |
| Credit agreement, leverage ratio | 5.00 |
| Credit agreement, maximum capital expenditure | $ 1,300,000 |
| March Thirty First Two Thousand Twenty One [Member] | |
| Line of Credit Facility [Line Items] | |
| Credit agreement, leverage ratio | 2.85 |