Income Taxes (Details) - USD ($)
|
12 Months Ended |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Income Taxes [Line Items] |
|
|
|
| Operating loss carryforwards, federal |
$ 147,770,000
|
|
|
| Operating loss carryforwards, state |
32,821,000
|
|
|
| Deferred tax assets, valuation allowance |
102,627,000
|
$ 75,179,000
|
|
| 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 |
83,323,000
|
71,494,000
|
|
| Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation |
1,319,000
|
1,917,000
|
$ 2,713,000
|
| Foreign tax credits, additional paid in capital benefit |
52,224,000
|
|
|
| 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 |
50.00%
|
3.00%
|
6.00%
|
| Effective tax rate excluding valuation allowance |
(28.00%)
|
(33.00%)
|
|
| Unrecognized tax benefits |
$ 1,355,000
|
$ 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
|
|
|