Long-Lived Assets (Details Textual) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Goodwill And Intangible Assets Disclosure [Abstract]
Total amortization expense	$ 6.4	$ 7.7	$ 13.3	$ 15.7
Estimated total amortization expense 2015	26.1		26.1
Estimated total amortization expense 2016	21.2		21.2
Estimated total amortization expense 2017	16.1		16.1
Estimated total amortization expense 2018	12.8		12.8
Estimated total amortization expense 2019	$ 8.8		$ 8.8