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Income Taxes (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Income Taxes [Line Items] |  |  |
Operating loss carryforwards, federal | $ 160,840,000 |  |
Operating loss carryforwards, state | 55,215,000 |  |
Deferred tax assets, valuation allowance | 75,179,000 | $ 35,927,000 |
Federal NOL annual utilization limit | 14,100,000 |  |
Net operating losses, unrecognized excess tax benefits, federal | 1,928,000 |  |
Net operating losses, unrecognized excess tax benefits, state | 37,771,000 |  |
Capital loss carryovers | 3,423,000 |  |
Deferred Tax Asset, Operating and Capital Loss Carryforwards and Credits | 71,494,000 | 59,427,000 |
Foreign withholding taxes |  |  | $ 4,605,000
Excess tax benefits from stock-based compensation | 0 | 0 | (1,398,000)
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation | 1,917,000 | 2,713,000 | $ 1,398,000
Foreign tax credits, additional paid in capital benefit | 34,298,000 |  |
Foreign tax credits utilized for financial statement purposes | $ 20,313,000 |  |
Tax Benefit From Reversal of the Net Deferred Tax Liability |  | $ 1,735,000 |
Effective Income Tax Rate Reconciliation, Percent | 3.00% | 6.00% | (27.00%)
Effective tax rate excluding valuation allowance | (28.00%) | (33.00%) | 31.00%
Unrecognized tax benefits | $ 2,127,000 |  |
unrecognized tax benefits primarily associated with state taxes | 85,000 |  |
Domestic Tax Authority [Member] |  |  |
Income Taxes [Line Items] |  |  |
Net operating losses included in deferred tax assets | 0 |  |
State and Local Jurisdiction [Member] |  |  |
Income Taxes [Line Items] |  |  |
Net operating losses included in deferred tax assets | 441,000 |  |
Capital Loss Carryforward Related to Business Acquisition [Member] | Internal Revenue Service (IRS) [Member] |  |  |
Income Taxes [Line Items] |  |  |
Operating Loss Carryforwards | $ 29,318,000 |  |

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