Employee Benefit Plans (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]
Minimum Years Of Age	18 years
Minimum Service Requirement	90 days
Defined Contribution Plan, Cost Recognized	$ 1,500,000	$ 1,200,000	$ 1,200,000
Defined Contribuition Plan Percentage Minimum Foreign Employees	3.00%
Defined Contribuition Plan Percentage Maximum Foreign Employees	31.00%
Defined Contribuition Plan Percentage Minimum Foreign Management	10.00%
Defined Contribution Plan Foreign, Cost Recognized	$ 724,000	$ 469,000	$ 565,000