|
Accounts Receivable (Detail) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2013
|
Dec. 31, 2012
|
|---|---|---|
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Trade receivables | $ 92,959 | $ 76,395 |
| Derivative receivables | 866 | 162 |
| Other receivables | 533 | 1,799 |
| Total accounts receivable | $ 94,358 | $ 78,356 |