Income Taxes Operating loss carryforward (Details) - USD ($) $ in Thousands |
Dec. 31, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Operating Loss Carryforwards [Line Items] | ||
| Deferred Tax Assets, Valuation Allowance | $ 283,636 | $ 287,151 |
| Operating Loss Carryforwards | 18,200 | |
| Foreign Tax Authority [Member] | ||
| Operating Loss Carryforwards [Line Items] | ||
| Deferred Tax Assets, Valuation Allowance | 6,500 | 7,100 |
| Operating Loss Carryforwards | 85,300 | |
| Domestic Tax Authority [Member] | ||
| Operating Loss Carryforwards [Line Items] | ||
| Deferred Tax Assets, Valuation Allowance | 277,100 | $ 280,100 |
| Operating Loss Carryforwards | $ 843,400 |