Derivative Financial Instruments - Balance Sheet (Details) - USD ($) $ in Thousands |
Dec. 31, 2015 |
Sep. 30, 2015 |
Dec. 31, 2014 |
|---|---|---|---|
| Derivative [Line Items] | |||
| Net fair value | $ 3,705 | $ 3,705 | $ 1,660 |
| Foreign Exchange Contract | |||
| Derivative [Line Items] | |||
| Net fair value | 3,705 | 1,660 | |
| Foreign Exchange Contract | Prepaid Expenses | |||
| Derivative [Line Items] | |||
| Net fair value | 3,705 | 1,660 | |
| Foreign Exchange Contract | Other Noncurrent Assets | |||
| Derivative [Line Items] | |||
| Net fair value | $ 0 | $ 0 |