Components of Accumulated Other Comprehensive Loss Reclassifications (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Selling, general and administrative expenses		$ 64,526	$ 67,774	$ 186,891	$ 212,537
Income (loss) from continuing operations before income taxes and equity loss		(5,201)	34,652	41,985	47,882
Income tax expense		(6,985)	(13,925)	(26,945)	(24,079)
Net income		(9,483)	26,129	14,108	25,144
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 loss		5,540	4,503	16,593	13,452
Income tax expense		(466)	(357)	(1,405)	(1,075)
Net income		5,074	4,146	15,188	12,377
Amount Reclassified from Accumulated Other Comprehensive Loss | Actuarial losses
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Selling, general and administrative expenses	[1]	4,000	2,900	11,942	8,576
Cost of services and products sold	[1]	1,473	1,534	4,447	4,670
Amount Reclassified from Accumulated Other Comprehensive Loss | Prior service costs
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Selling, general and administrative expenses	[1]	31	24	93	70
Cost of services and products sold	[1]	36	45	111	136
Amount Reclassified from Accumulated Other Comprehensive Loss | Effective Portion of Deriviatives Designated as Hedging Instruments
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Income tax expense	[1]	(28)	0	(28)	(1)
Net income	[1]	50	2	52	3
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]
Cost of services and products sold	[1]	$ 78	$ 2	$ 80	$ 4

[1] These accumulated other comprehensive loss components are included in the computation of net periodic pension costs. See Note 10, Employee Benefit Plans, for additional details.