Components of Accumulated Other Comprehensive Loss Reclassifications (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Selling, general and administrative expenses	$ 50,249	$ 64,526	$ 150,553	$ 186,891
Income (loss) from continuing operations before income taxes and equity income (loss)	(29,295)	(5,201)	(57,337)	41,985
Income tax expense	5,079	6,985	14,913	26,945
Net loss	(31,544)	(9,483)	(65,437)	14,108
Amount Reclassified from Accumulated Other Comprehensive Loss
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Income tax expense	(15,046)		(16,822)
Amount Reclassified from Accumulated Other Comprehensive Loss | Cumulative Unrecognized Actuarial Losses on Pension Obligations
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Income (loss) from continuing operations before income taxes and equity income (loss)	4,579	5,540	13,803	16,593
Income tax expense	(601)	(466)	(1,635)	(1,405)
Net loss	3,978	5,074	12,168	15,188
Amount Reclassified from Accumulated Other Comprehensive Loss | Actuarial losses
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Selling, general and administrative expenses	2,042	4,000	6,703	11,942
Cost of services and products sold	2,253	1,473	6,696	4,447
Amount Reclassified from Accumulated Other Comprehensive Loss | Prior service costs
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Selling, general and administrative expenses	(5)	31	(9)	93
Cost of services and products sold	66	36	190	111
Amount Reclassified from Accumulated Other Comprehensive Loss | Settlement/Curtailment Losses [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Selling, general and administrative expenses	223	0	223	0
Amount Reclassified from Accumulated Other Comprehensive Loss | Effective Portion of Deriviatives Designated as Hedging Instruments
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Net loss	0	(50)	(258)	(52)
Foreign currency forward exchange contracts | Amount Reclassified from Accumulated Other Comprehensive Loss | Effective Portion of Deriviatives Designated as Hedging Instruments
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Revenues	0	0	(408)	0
Cost of services and products sold	0	(78)	(1)	(80)
Income (loss) from continuing operations before income taxes and equity income (loss)	0	(78)	(409)	(80)
Income tax expense	$ 0	$ 28	$ 151	$ 28