Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Finite-Lived Intangible Assets [Line Items] | ||
| Carrying amount: | $ 126,066 | |
| Accumulated amortization: | 1,485 | |
| Intangible assets | 124,581 | $ 0 |
| Amortization of intangible assets | 1,500 | |
| Amortization expense 2016 | 12,600 | |
| Amortization expense 2017 | 12,600 | |
| Amortization expense 2018 | 12,600 | |
| Amortization expense 2019 | 12,600 | |
| Amortization expense 2020 | 12,600 | |
| Customer service agreements | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Carrying amount: | 125,960 | |
| Accumulated amortization: | $ 1,484 | |
| Estimated useful life | 10 years | |
| Years until the next renewal | 2 years 9 months 11 days | |
| Other | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Carrying amount: | $ 106 | |
| Accumulated amortization: | $ 1 |