Derivatives Instruments Fair Value (Details) - Foreign Currency Hedge - Accounts payable and accrued liabilities - Foreign Exchange Forward - USD ($) $ in Thousands |
Jun. 30, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Summary of aggregate notional amount and estimated fair value of derivative instruments | ||
| Notional | $ 136,029 | $ 160,802 |
| Fair Value | 1,208 | 3,402 |
| Providência Contracts | Undesignated hedges: | ||
| Summary of aggregate notional amount and estimated fair value of derivative instruments | ||
| Notional | 120,444 | 140,623 |
| Fair Value | 1,848 | 3,962 |
| Providência Instruments | Undesignated hedges: | ||
| Summary of aggregate notional amount and estimated fair value of derivative instruments | ||
| Notional | 15,585 | 20,179 |
| Fair Value | (640) | (560) |
| Hygiene Line | Undesignated hedges: | ||
| Summary of aggregate notional amount and estimated fair value of derivative instruments | ||
| Notional | 0 | 0 |
| Fair Value | $ 0 | $ 0 |