Commitments and Contingencies Representation and Warranty Obligations (Details) - USD ($) $ in Thousands |
Dec. 31, 2017 |
Dec. 31, 2016 |
|---|---|---|
| Commitments and Contingencies [Abstract] | ||
| Reserve for representation and warranty obligations | $ 389 | $ 3,976 |
| X | ||||||||||
- Definition Commitments and Contingencies [Abstract] No definition available.
|
| X | ||||||||||
- Definition Reflects the estimated amount of loss from the specified contingency as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|