Sales of Accounts Receivable and Receivable Discount Program - Additional Information (Detail) - Trade Accounts Receivable [Member] - USD ($) $ in Thousands |
9 Months Ended | |
|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Proceeds from sale of accounts receivable | $ 17,984 | $ 49,138 |
| Selling, General and Administrative Expenses [Member] | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Pre-tax losses on accounts receivable | $ 56 | $ 88 |