Other Assets Depreciation Expense (Details) - USD ($) $ in Thousands  | 
3 Months Ended | 6 Months Ended | |
|---|---|---|---|
Jun. 30, 2015  | 
Jun. 30, 2015  | 
Jun. 30, 2014  | 
|
| Property, Plant and Equipment [Line Items] | |||
| Depreciation of fixed assets | $ 333 | $ 652 | $ 463 | 
| X | ||||||||||
- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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