Income Taxes Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items] | |||
| Current income tax benefit | $ 6 | $ (1,484) | |
| Unrecognized tax benefits - beginning of year | 0 | 0 | $ 3,201 |
| Gross additions - current year tax positions | 0 | 0 | |
| Gross additions - prior year tax positions | 0 | 0 | |
| Gross reductions - prior year tax positions | 0 | (1,256) | |
| Gross reductions - settlements with taxing authorities | 0 | (1,945) | |
| Impact due to expiration of statute of limitations | 0 | 0 | |
| Deferred income tax expense | 87 | 263 | |
| Income tax benefit | $ 93 | $ (1,221) | |