Employee Benefit Plans (Details 4) - USD ($)		1 Months Ended	12 Months Ended
	Aug. 18, 2015	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Employee Benefit Plans
Base contribution as a percentage of employee gross pay (as a percent)			2.00%
Employer maximum match of an employee's contributions of first 4% of eligible compensation (as a percent)			100.00%
Percentage of eligible compensation, matched 100% by employer			4.00%
Company's matching contributions under certain 401(k) savings plans			$ 4,300,000	$ 4,400,000	$ 4,200,000
Employee Benefit Plans
Charges for pension plans			62,700,000	1,500,000	100,000
EMEA pension plans
Employee Benefit Plans
Charges for pension plans			4,900,000	$ 5,500,000	$ 5,800,000
Timothy P. Horne
Components of net periodic benefit cost
Consulting service payment (as a percent)	50.00%
Period of annual base salary	3 years
Annual payment for consulting services	$ 400,000
Payments for consulting service as per compensation agreement	598,562
Lump sum buyout of consulting services lifetime payment obligation	$ 6,000,000
Payment for lump-sum buyout of lifetime consulting service payment obligation		$ 6,000,000
Pre-tax charge for lump-sum buyout of lifetime payment obligation			$ 5,000,000