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Summary of Significant Accounting Policies (Schedule of Acquired Finite-Lived Intangible Assets by Major Class) (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Acquired Finite-Lived Intangible Assets [Line Items]    
Acquisition cost $ 47,232 $ 69,287
Accumulated amortization (11,514) (12,650)
Intangible Assets, Net (Excluding Goodwill), Total 35,718 56,637
Customer Lists [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Acquisition cost 23,003 33,686
Accumulated amortization (6,101) (6,687)
Intangible Assets, Net (Excluding Goodwill), Total 16,902 26,999
Trademarks [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Acquisition cost 15,129 22,224
Accumulated amortization (3,043) (3,338)
Intangible Assets, Net (Excluding Goodwill), Total 12,086 18,886
Technology [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Acquisition cost 9,066 13,327
Accumulated amortization (2,336) (2,575)
Intangible Assets, Net (Excluding Goodwill), Total 6,730 10,752
Other Intangible Assets [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Acquisition cost 34 50
Accumulated amortization $ (34) $ (50)
Intangible Assets, Net (Excluding Goodwill), Total