Pension and Postretirement Benefits (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan expense	$ 19,600	$ 20,400	$ 20,000
U.S Defined Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.75%	4.00%	4.50%
Rate of increase in compensation levels	4.00%	4.25%	4.25%
Long-term rate of return on assets	6.25%	6.00%	6.00%
MP Improvement Scale Rate (as a percent)	75.00%
Prior service cost to be amortized from accumulated other comprehensive loss next year	$ 500
Estimated net gain (loss) to be amortized from accumulated other comprehensive loss next year	(4,900)
Company contributions	21,031	$ 20,746
U.S Defined Benefit Plans | Minimum
Defined Benefit Plan Disclosure [Line Items]
Estimated contributions in the next year	$ 20,000
Non-U.S Defined Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.13%	3.40%	4.22%
Rate of increase in compensation levels	3.61%	3.95%	3.83%
Long-term rate of return on assets	5.03%	5.51%	5.49%
Prior service cost to be amortized from accumulated other comprehensive loss next year	$ 0
Estimated net gain (loss) to be amortized from accumulated other comprehensive loss next year	(4,900)
Company contributions	22,785	$ 22,740
Estimated contributions in the next year	$ 12,000
Postretirement Medical Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.25%	3.75%	4.00%
Prior service cost to be amortized from accumulated other comprehensive loss next year	$ 100
Estimated net gain (loss) to be amortized from accumulated other comprehensive loss next year	(600)
Company contributions	$ 5,100	$ 3,800	$ 3,700
Assumed rate of increase in medical costs	7.50%	7.50%	7.50%
Minimum medical cost rate to be acheived	5.00%
Equity Securities | U.S Defined Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation (as a percent)	50.00%	50.00%
Plan assets, actual allocation (as a percent)	50.00%	50.00%
Equity Securities | Non-U.S Defined Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation (as a percent)	29.00%	27.00%
Plan assets, actual allocation (as a percent)	27.00%	27.00%
Fixed Income | U.S Defined Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation (as a percent)	50.00%	50.00%
Plan assets, actual allocation (as a percent)	50.00%	50.00%
Fixed Income | Non-U.S Defined Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation (as a percent)	65.00%	71.00%
Plan assets, actual allocation (as a percent)	64.00%	71.00%
U.K. , the Netherlands and Canadian Plan Assets | Non-U.S Defined Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Plan assets, actual allocation (as a percent)	94.00%