XML 48 R34.htm IDEA: XBRL DOCUMENT v2.4.0.6
Income Taxes Income Taxes (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Income Tax Disclosure [Abstract]        
Effective Tax Rate 3.40% 5.70% 3.60% 4.70%