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Fair Value Measurements (Narrative) (Details)
$ in Millions
Jun. 30, 2021
USD ($)
Senior Notes [Member]  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Long-term debt measured at fair value $ 399.5
Line of Credit [Member] | Revolving Credit Facility [Member] | Revolving Credit Facility, Secured, Floating Rate [Member]  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Long-term Debt 60.5
Notes Payable, Other Payables [Member] | Acquisition Debt  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Long-term Debt $ 5.2