Registration of securities issued in business combination transactions

Income Taxes (Differences in the total income tax expense) (Details)

v2.4.0.8
Income Taxes (Differences in the total income tax expense) (Details)
3 Months Ended 12 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Differences in the total income tax expense from the amounts computed by applying the U.S. federal income tax rate          
Provision at statutory rate 35.00%   35.00% 35.00% 35.00%
State income taxes, net of federal benefit     1.00% 0.90% (1.00%)
Foreign taxes     1.30% 1.30% 1.20%
Change in valuation allowance         (0.20%)
Foreign earnings repatriation     (1.10%) (1.10%) (1.00%)
Permanent differences     0.10%   (0.50%)
Other, net     0.10% (0.30%) 0.40%
Total income tax expense 36.90% 37.10% 36.40% 35.80% 33.90%