Quarterly report pursuant to Section 13 or 15(d)

Accounting for Uncertainty in Income Taxes (Details Textual)

v2.4.0.6
Accounting for Uncertainty in Income Taxes (Details Textual) (USD $)
In Millions, unless otherwise specified
6 Months Ended 12 Months Ended
Jun. 30, 2012
Dec. 31, 2011
Jun. 30, 2011
Accounting for Uncertainty in Income Taxes (Textual) [Abstract]      
Liability for unrecognized tax $ 14.8   $ 16.2
Unrecognized tax favorable impact on effective tax rate 6.9   5.8
Accrued interest and penalties applied to uncertain tax positions $ 8.1 $ 8.4