Summary of Significant Accounting Policies - New Accounting Pronouncements (Details) - USD ($) $ in Thousands |
Dec. 31, 2015 |
Dec. 31, 2014 |
|---|---|---|
| New accounting pronouncement disclosures | ||
| Long-term Debt and Capital Lease Obligations | $ 2,187,943 | $ 2,325,775 |
| Proforma Adjustment - if ASU had been early adopted | ||
| New accounting pronouncement disclosures | ||
| Long-term Debt and Capital Lease Obligations | (31,300) | (39,100) |
| Other noncurrent assets, net | Proforma Adjustment - if ASU had been early adopted | ||
| New accounting pronouncement disclosures | ||
| Unamortized deferred cost | $ (31,300) | $ (39,100) |