Operating Segments and Geographic Information - Reconciliations of Other Segment Measures to Consolidated Totals (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total segment assets	$ 3,139,734	$ 3,406,759	$ 3,779,321
Cash and cash equivalents	501,994	407,480	407,454
Goodwill	1,251,938	1,243,669	1,206,877
Intangible assets, less accumulated amortization	287,071	339,505	359,931
Deferred income taxes	29,536	25,216	26,459
Payments to acquire property, plant, and equipment from continuing operations	90,215	110,002	97,847
Discontinued operations acquisition of property, plant and equipment	16,712	29,414	22,681
Reportable Segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total segment assets	985,252	991,607	938,971
Payments to acquire property, plant, and equipment from continuing operations	69,898	77,478	72,153
Corporate assets
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total segment assets	83,943	24,147	16,786
Assets of discontinued operations	0	375,135	822,843
Payments to acquire property, plant, and equipment from continuing operations	$ 3,605	$ 3,110	$ 3,013