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Fair Value Measurements - Asset and Liabilities Measured at Fair Value (Details) - Fair Value, Measurements, Recurring
$ in Millions
Mar. 31, 2019
USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Cash equivalents $ 3.8
Interest rate swap 1.4
Contingent consideration 7.1
Level 1  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Cash equivalents 3.8
Level 2  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Interest rate swap 1.4
Level 3  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Contingent consideration $ 7.1