Other Comprehensive Income (Loss) - (Components of Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Equity [Abstract]
Cumulative translation adjustment, Pre-tax	$ (76,822)	$ (63,441)	$ (77,024)
Cumulative translation adjustment, Tax	0	0	0
Cumulative translation adjustment, Net of Tax	(76,822)	(63,441)	(77,024)
Reclassification of foreign currency translation to earnings upon sale of business, Pre-tax	14,257	(4,725)
Reclassification of foreign currency translation to earnings upon sale of business, Tax	0	0
Reclassification of foreign currency translation to earnings upon sale of business	14,257	(4,725)	0
Foreign currency translation adjustments, Pre-tax	(62,565)	(68,166)
Foreign currency translation adjustments, Tax	0	0
Foreign currency translation adjustments, Net of Tax	(62,565)	(68,166)	(77,024)
Pension and other postretirement adjustments
Net gain (loss) arising during the year, Pre-tax	(1,927)	8,318	(26,424)
Net gain (loss) arising during the year, Tax	789	(2,411)	7,767
Net gain (loss) arising during the year, Net of Tax	(1,138)	5,907	(18,657)
Amortization/recognition of settlement loss, Pre-tax	7,083	4,939	3,113
Amortization/recognition of settlement loss, Tax	(2,896)	(1,431)	(915)
Amortization/recognition of settlement loss, Net of Tax	4,187	3,508	2,198
Pension and other postretirement adjustments, Pre-tax	5,156	13,257	(23,311)
Pension and other postretirement adjustments, Tax	(2,107)	(3,842)	6,852
Pension and other postretirement adjustments, Net of Tax	3,049	9,415	(16,459)
Reclassification adjustments for derivatives, Pre-tax	6,851	7,030	7,223
Reclassification adjustments for derivatives, Tax	(2,490)	(2,499)	(2,713)
Reclassification adjustments for derivatives, Net of tax	4,361	4,531	4,510
Total other comprehensive income (loss), Pre-tax	(50,558)	(47,879)	(93,112)
Total other comprehensive income (loss), Tax	(4,597)	(6,341)	4,139
Other comprehensive income (loss)	$ (55,155)	$ (54,220)	$ (88,973)