Income Taxes (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Operating Loss Carryforwards [Line Items]
Cumulative amount of undistributed earning of foreign subsidiaries	$ 551.4
Alternative minimum tax credit	5.2	8.9
Foreign tax credit	7.3	13.9
Foreign tax credits valuation allowance	7.3	13.9
State net operating loss	26.6	31.1
State net operating loss carryforwards valuation allowance	12.8	15.8
Foreign net operating loss	9.5	7.3
Unrecognized Tax Benefits	4.7	20.8	42.7
Decrease in income tax expenses unrecognized tax benefits if recognized	3.2	18.8
Unrecognized foreign tax benefits	0.4
Reductions due to expiration of the applicable statute of limitations	16.1	0
Expiration of the applicable statute of limitations	15.5		0
Reductions due to settlement of audit issues	0	(21.9)
Settlement of audit issues	0	4.8	(9.5)
Domestic Country [Member]
Operating Loss Carryforwards [Line Items]
Amount of U.S. federal tax net operating loss	$ 108.8