v2.4.0.8
Income Taxes Schedule of Effective Income Tax Rate Reconciliation (Details)
9 Months Ended 12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Tax Disclosure [Abstract]          
U.S. federal statutory rate     35.00% 35.00% 35.00%
State income taxes, net of state credits and federal tax impact     3.10% 3.10% 3.40%
Impact of international operations     (2.30%) (0.80%) (0.30%)
Non-deductible expenses     0.80% 0.70% 0.30%
Federal production incentives and credits     (0.30%) (0.40%) (0.20%)
Revaluation of deferred taxes     (0.30%) 0.00% (0.50%)
Other, net     0.20% (0.20%) 0.40%
Effective tax rate 34.60% 36.30% 36.20% 37.40% 38.10%