Income Taxes (Details 4)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Tax Disclosure [Abstract]
U.S. federal statutory income tax rate	35.00%	35.00%	35.00%
State taxes (net of federal benefit)	0.90%	0.90%	0.40%
Foreign losses without tax benefit	0.60%	0.30%	3.00%
Foreign operations taxed at lower rates	(18.30%)	(20.60%)	(28.00%)
ESOP dividend	(0.40%)	(0.30%)	(0.70%)
Repatriation from current year foreign earnings	1.80%	5.90%	4.70%
Other	(0.40%)	0.50%	1.00%
Consolidated effective income tax rate	19.20%	21.70%	15.40%