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Consolidated Statements of Comprehensive Income (Footnote) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Statement of Comprehensive Income [Abstract]        
Depreciation and other excluded from direct operating expenses $ 28,700,000 $ 31,200,000 $ 86,700,000 $ 94,300,000
Foreign currency translation adjustment, tax effect $ 0 $ 0 $ 0 $ 0