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Goodwill and Other Intangible Assets - Summary of Other Intangible Assets (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Other Intangible Assets, gross:    
Other Intangible Assets, gross $ 632,692 $ 632,844
Total Accumulated Amortization (291,848) (280,807)
Other Intangible Assets, net 340,844 352,037 [1],[2]
Patents    
Other Intangible Assets, gross:    
Other Intangible Assets, gross 22,496 22,509
Total Accumulated Amortization (10,021) (9,539)
Customer lists    
Other Intangible Assets, gross:    
Other Intangible Assets, gross 548,443 548,038
Total Accumulated Amortization (256,696) (246,946)
Trade names    
Other Intangible Assets, gross:    
Other Intangible Assets, gross 31,010 31,174
Total Accumulated Amortization (7,773) (7,413)
Proprietary technology    
Other Intangible Assets, gross:    
Other Intangible Assets, gross 28,333 28,748
Total Accumulated Amortization (15,818) (15,400)
Land use rights    
Other Intangible Assets, gross:    
Other Intangible Assets, gross 286 282
Total Accumulated Amortization (49) (48)
Other    
Other Intangible Assets, gross:    
Other Intangible Assets, gross 2,124 2,093
Total Accumulated Amortization $ (1,491) $ (1,461)
[1] The year-end condensed consolidated balance sheet data was derived from audited financial statements, but does not include all disclosures required by accounting principles generally accepted in the United States of America.
[2] The year-end condensed consolidated balance sheet data was derived from audited financial statements, but does not include all disclosures required by accounting principles generally accepted in the United States of America.