Pension and Other Postretirement Benefits - Narrative (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Pension and Other Postretirement Benefits [Abstract]
Value of Employer Securities Included in Plan Assets	$ 771	$ 539
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation	150,374	145,836
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	2,027	1,703	1,624
Domestic [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation	66,369	69,951
Net Periodic Benefit Cost	1,701	1,921	1,589
Foreign [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation	84,005	75,885
Net Periodic Benefit Cost	5,285	3,649	2,843
Domestic Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net Periodic Benefit Cost	251	444	422
Supplemental Retirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Net Periodic Benefit Cost	$ 811	$ 700	$ 628
Company Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Domestic Pension Assets	1.00%	1.00%