Pension and Other Postretirement Benefits - Narrative (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Pension and Other Postretirement Benefits [Abstract]
Value of Employer Securities Included in Plan Assets	$ 539	$ 389
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation	145,836	123,889
Description of Defined Contribution Plan	The Company has a 401(k) plan with an employer match covering substantially all domestic employees. The plan allows for and the Company has paid a nonelective contribution on behalf of participants who have completed one year of service equal to 3% of the eligible participants’ compensation in the form of Company common stock.
Non-elective Match Percentage	3.00%
Total Contribution Amount	1,703	1,624	2,197
Domestic [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation	69,951	65,820
Net Periodic Benefit Cost	1,921	1,589	3,298
Settlement Charge	0	0	(1,317)
Foreign [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation	75,885	58,069
Net Periodic Benefit Cost	3,649	2,843	2,094
Settlement Charge	0	0	0
Domestic Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net Periodic Benefit Cost	444	347	478
Supplemental Retirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Net Periodic Benefit Cost	700	628	2,042
Settlement Charge			$ 1,317
Company Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Domestic Pension Assets	1.00%	1.00%