Employee Benefits (Details 3) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Summary of the changes in pension and postretirement benefits recognized in other comprehensive (income) loss
Total recognized in other comprehensive (income) loss	$ (23,689,000)	$ 8,326,000	$ 21,750,000
Pension Benefits
Summary of the changes in pension and postretirement benefits recognized in other comprehensive (income) loss
Net (gain) loss arising during period	(20,977,000)	12,533,000	23,082,000
Amortization of transition asset	272,000	269,000	284,000
Amortization of prior service credit	393,000	54,000	58,000
Other (gain) loss		(3,216,000)	184,000
Amortization of (loss)	(3,452,000)	(2,417,000)	(1,794,000)
Foreign currency exchange impact	268,000	713,000	(321,000)
Total recognized in other comprehensive (income) loss	(23,496,000)	7,936,000	21,493,000
Net recognized in net periodic benefit cost and other comprehensive (income) loss	(21,392,000)	9,940,000	22,888,000
Net periodic benefit cost	2,104,000	2,004,000	1,395,000
Amounts expected to be recognized in the next fiscal year
Net gain (loss) expected to be recognized	(1,700,000)
Net transition assets expected to be recognized	300,000
Net prior service credit cost expected to be recognized	400,000
Actuarial assumptions used to determine pension obligations and other postretirement benefit obligations
Amount contributed by the employer	2,732,000	7,816,000
Estimated Future Benefit Payments
2014	9,130,000
2015	9,797,000
2016	9,738,000
2017	10,413,000
2018	11,077,000
Years 2019-2023	61,125,000
Domestic defined benefit plans
Actuarial assumptions used to determine pension costs and other postretirement benefit costs
Weighted average discount rate (as a percent)	4.31%	5.11%	5.93%
Weighted average expected return on plan assets (as a percent)	7.75%	7.75%	8.00%
Actuarial assumptions used to determine pension obligations and other postretirement benefit obligations
Weighted average discount rate (as a percent)	5.24%	4.31%
Amount contributed by the employer	0	5,300,000
Domestic defined benefit plans | Equity securities
Actuarial assumptions used to determine pension obligations and other postretirement benefit obligations
Plan assets target allocation (as a percent)	55.00%
Domestic defined benefit plans | Debt securities
Actuarial assumptions used to determine pension obligations and other postretirement benefit obligations
Plan assets target allocation (as a percent)	36.00%
Domestic defined benefit plans | Other assets
Actuarial assumptions used to determine pension obligations and other postretirement benefit obligations
Plan assets target allocation (as a percent)	9.00%
Foreign pension plans
Summary of the changes in pension and postretirement benefits recognized in other comprehensive (income) loss
Net periodic benefit cost	1,400,000	1,900,000	1,800,000
Actuarial assumptions used to determine pension costs and other postretirement benefit costs
Weighted average discount rate (as a percent)	2.34%	3.01%	3.09%
Weighted average expected return on plan assets (as a percent)	3.91%	4.07%	4.24%
Weighted average rate of compensation increase (as a percent)	2.51%	2.51%	2.51%
Actuarial assumptions used to determine pension obligations and other postretirement benefit obligations
Weighted average discount rate (as a percent)	2.75%	2.34%
Weighted average rate of compensation increase (as a percent)	1.76%	2.51%
Expected contribution to be paid in the next fiscal year	2,600,000
Foreign pension plans | Equity securities
Actuarial assumptions used to determine pension obligations and other postretirement benefit obligations
Plan assets target allocation (as a percent)	37.00%
Foreign pension plans | Debt securities
Actuarial assumptions used to determine pension obligations and other postretirement benefit obligations
Plan assets target allocation (as a percent)	45.00%
Foreign pension plans | Other assets
Actuarial assumptions used to determine pension obligations and other postretirement benefit obligations
Plan assets target allocation (as a percent)	18.00%
Post Retirement Benefits
Summary of the changes in pension and postretirement benefits recognized in other comprehensive (income) loss
Net (gain) loss arising during period	(452,000)	30,000	(94,000)
Amortization of prior service credit	254,000	353,000	353,000
Amortization of (loss)	5,000	7,000
Total recognized in other comprehensive (income) loss	(193,000)	390,000	259,000
Net recognized in net periodic benefit cost and other comprehensive (income) loss	(342,000)	159,000	62,000
Net periodic benefit cost	(149,000)	(231,000)	(197,000)
Amounts expected to be recognized in the next fiscal year
Net gain (loss) expected to be recognized	100,000
Actuarial assumptions used to determine pension obligations and other postretirement benefit obligations
Weighted average discount rate (as a percent)	5.13%	4.21%
Amount contributed by the employer	229,000	276,000
Estimated Future Benefit Payments
2014	131,000
2015	125,000
2016	127,000
2017	130,000
2018	131,000
Years 2019-2023	$ 646,000
Domestic post retirement plan
Actuarial assumptions used to determine pension costs and other postretirement benefit costs
Weighted average discount rate (as a percent)	4.21%	4.92%	5.50%
Actuarial assumptions used to determine pension obligations and other postretirement benefit obligations
Weighted average discount rate (as a percent)	5.13%	4.21%