Long-Lived Assets (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Long-Lived Assets (Textual) [Abstract]
Total amortization expense	$ 8.4	$ 10.1	$ 17.5	$ 19.7
Estimated total amortization expense 2013	34.3		34.3
Estimated total amortization expense 2014	25.8		25.8
Estimated total amortization expense 2015	17.2		17.2
Estimated total amortization expense 2016	12.9		12.9
Estimated total amortization expense 2017	$ 10.3		$ 10.3