Pension and Other Postretirement Benefit Plans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Deferred Compensation Arrangement with Individual, Employer Contribution	$ 300
Deferred Compensation Arrangement with Individual, Compensation Expense	1,700	$ 1,900	$ 3,500
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	(85)	$ 7	159
Defined Benefit Plan, Future Amortization of Transition Obligation (Asset)	$ 100
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	2.60%	3.70%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.60%	2.20%
Defined Benefit Plan, Benefit Obligation	$ 50,759	$ 59,338	49,456
Defined Benefit Plan, Service Cost	1,787	1,445	1,582
Defined Benefit Plan, Interest Cost	1,192	1,756	1,676
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost (Credit), Tax	0	(1,024)	(583)
Defined Benefit Plan, Benefits Paid	(982)	(1,136)
defined benefit plan, Administrative Expenses	(169)	(220)
Defined Benefit Plan, Actuarial Net (Gains) Losses	(4,416)	16,667
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Benefit Obligation	$ (5,991)	$ (7,606)
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	2.60%	3.30%
Defined Benefit Plan, Future Amortization of Gain (Loss)	$ (600)
Defined Benefit Plan, Amortization of Transition Obligations (Assets)	$ (96)	$ (87)	(87)
Weighted average rate of compensation increase	0% - 3%	0% - 3%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	3.00%	3.00%
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets	$ (4,811)	$ (6,089)
Defined Benefit Plan, Fair Value of Plan Assets	41,116	47,528	$ 39,504
Defined Benefit Plan, Actual Return on Plan Assets	(2,279)	13,572
Defined Benefit Plan, Contributions by Employer	1,829	1,897
Defined Benefit Plan, Funded Status of Plan	(9,643)	(11,810)
Defined Benefit Plan, Accumulated Benefit Obligation	43,969	50,837
Interest Rate Swap [Domain]
Defined Benefit Plan Disclosure [Line Items]
Interest Rate Derivatives, at Fair Value, Net	$ (998)	$ (1,082)