Income Taxes - Narrative (Details) - USD ($) $ in Thousands |
6 Months Ended | |
|---|---|---|
Jun. 30, 2015 |
Jun. 30, 2014 |
|
| Operating Loss Carryforwards [Line Items] | ||
| U.S. federal statutory tax rate (percent) | 35.00% | 35.00% |
| Unrecognized tax benefits, income tax penalties and interest accrued | $ 300 | |
| The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate | 7,044 | $ 4,400 |
| Federal [Member] | ||
| Operating Loss Carryforwards [Line Items] | ||
| Operating loss carryforwards | 46,800 | |
| State Tax [Member] | ||
| Operating Loss Carryforwards [Line Items] | ||
| Operating loss carryforwards | 40,300 | |
| State Tax [Member] | Between Tax Year 2028 and 2034 [Member] | ||
| Operating Loss Carryforwards [Line Items] | ||
| Operating loss carryforwards | 4,100 | |
| State Tax [Member] | Tax Year 2024 [Member] | ||
| Operating Loss Carryforwards [Line Items] | ||
| Operating loss carryforwards | $ 1,400 | |