Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Income Taxes (Textual) [Abstract]
Provision for income taxes as a percentage of earnings before income taxes	35.90%	14.80%	35.40%	29.20%
Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions		$ 1.5
Effective Income Tax Rate Reconciliation, Other Adjustments		33.10%		35.00%