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Nature of Business and Significant Accounting Policies (Long-lived assets) (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2014
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2010
USD ($)
Dec. 31, 2009
USD ($)
Mar. 31, 2012
ft²
Sep. 30, 2011
ft²
Impaired Long-Lived Assets Held and Used [Line Items]              
Goodwill impairment   $ 15,666 $ 0        
Gain (Loss) on Disposition of Business     1,200        
Other Asset Impairment Charges     700        
Asset Impairment Charges $ 600 $ 635 2,086        
Net Rentable Area | ft²           6,700 47,000
Discontinued Operations [Member]              
Impaired Long-Lived Assets Held and Used [Line Items]              
Asset Impairment Charges       $ 600 $ 700    
Marketing Services [Member]              
Impaired Long-Lived Assets Held and Used [Line Items]              
Asset Impairment Charges     $ 600