Derivative Instruments and Hedging Activities-By Balance Sheet Location (Details) - Interest Rate Swap - USD ($) $ in Thousands |
Sep. 30, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Derivative [Line Items] | ||
| Total fair value | $ 18,691 | $ 13,483 |
| Other current liabilities | ||
| Derivative [Line Items] | ||
| Total fair value | 4,546 | 3,914 |
| Other noncurrent liabilities | ||
| Derivative [Line Items] | ||
| Total fair value | $ 14,145 | $ 9,569 |