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Business Combinations (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Mar. 31, 2019
Dec. 31, 2018
Business Acquisition [Line Items]        
Goodwill $ 713,527 $ 681,358 $ 679,395 $ 664,922
2020 Acquisition        
Business Acquisition [Line Items]        
Gross Aggregate Consideration 77,500      
Cash Assumed 1,700      
Business Combination, Consideration Transferred 67,600      
Business combination, provisional information, initial accounting incomplete, working capital adjustment accrual 3,200      
Business Combination indemnity holdback liability 5,000      
Current Assets 46,100      
Property, Plant, and Equipment 4,900      
Goodwill 32,200      
Other Intangibles 20,600      
Current Liabilities 21,200      
Deferred Credits and Other Liabilities $ 5,100