Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - PPE And Revenue Recognition (Details)

v3.3.1.900
Summary of Significant Accounting Policies - PPE And Revenue Recognition (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Insurance receivables      
Insurance receivables $ 1.8    
Insurance Liabilities      
Insurance liability   $ 1.4  
Advertising      
Advertising expense $ 1.5 2.5 $ 3.1
Minimum      
Goodwill and Other Intangible Assets      
Annual growth rate of cash flows (in percent) 1.00%    
Maximum      
Goodwill and Other Intangible Assets      
Annual growth rate of cash flows (in percent) 3.00%    
Buildings and land improvements | Minimum      
Property and Equipment      
Estimated Useful Life (in years) 20 years    
Buildings and land improvements | Maximum      
Property and Equipment      
Estimated Useful Life (in years) 40 years    
Software and company vehicles | Minimum      
Property and Equipment      
Estimated Useful Life (in years) 3 years    
Software and company vehicles | Maximum      
Property and Equipment      
Estimated Useful Life (in years) 6 years    
Equipment | Minimum      
Property and Equipment      
Estimated Useful Life (in years) 3 years    
Equipment | Maximum      
Property and Equipment      
Estimated Useful Life (in years) 15 years    
Installation | Unbilled Revenues      
Revenue Recognition      
Revenues $ 23.7 $ 23.6