Income Taxes (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Tax Disclosure [Abstract]
The company has not recognized deferred income taxes of undistributed earnings of its international subsidiaries	$ 665,924
The Company repatriated a dividend from a portion of current year foreign earnings to the U.S. in the amount of	8,000
Dividend increased tax expense by	$ 2,131
Dividend increased tax expense by	1.80%	5.90%	4.70%