Income Taxes - (Details Textual) - USD ($) |
3 Months Ended | 12 Months Ended | |||||
|---|---|---|---|---|---|---|---|
Dec. 31, 2015 |
Sep. 30, 2015 |
Jun. 30, 2015 |
Mar. 31, 2015 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Income Tax Disclosure [Abstract] | |||||||
| Impairment of goodwill | $ 175,028,000 | $ 0 | $ 0 | $ 0 | $ 0 | $ 175,028,000 | $ 0 |
| Impairment of goodwill, not tax deductible | 91,961,000 | ||||||
| Tax impact related to the non-deductible portion of the goodwill impairment change | 32,186,000 | ||||||
| Goodwill impairment tax impact | (2,876,000) | 35,062,000 | 0 | ||||
| Deferred tax asset reflecting federal and state net operating losses | 243,865,000 | 346,768,000 | 243,865,000 | ||||
| Federal net operating losses | $ 887,228,000 | ||||||
| Expiration date for federal net operating losses | 2028 | ||||||
| Unrecognized tax benefits that would affect the effective tax rate | $ 0 | $ 0 | $ 0 | $ 0 | |||
| Period for unrecognized tax benefits to increase or decrease | 12 months | ||||||
| Interest and penalties related to unrecognized tax benefits | $ 0 | ||||||
| Deferred tax liability related to investments in foreign subsidiaries | $ 0 | ||||||