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Goodwill and Intangible Assets Goodwill and Intangible Assets - USD ($)
$ in Thousands
3 Months Ended
Jun. 30, 2016
Dec. 31, 2015
Apr. 17, 2015
Apr. 22, 2013
Finite-Lived Intangible Assets [Line Items]        
Goodwill (Note 3) $ 6,708 $ 6,708    
Goodwill, Acquired During Period $ 0      
April 17, 2015 Acquisition [Member]        
Finite-Lived Intangible Assets [Line Items]        
Acquired Finite-lived Intangible Asset, Residual Value     $ 13,500  
ITS [Member]        
Finite-Lived Intangible Assets [Line Items]        
Acquired Finite-lived Intangible Asset, Residual Value       $ 8,500