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Recently Issued And Adopted Accounting Pronouncements (Details Textual) - ASU 2020-06 [Member]
shares in Millions, $ in Millions
1 Months Ended
Aug. 31, 2020
USD ($)
shares
Recently Issued And Adopted Accounting Pronouncements [Line Items]  
Accounting for convertible instruments, Debt Modification, Increase (Decrease) in Debt Discounts, before Tax Amount $ 56.8
Accounting for convertible instruments, Debt Modification, Increase (Decrease) in Equity, Tax Amount 15.0
Additional Paid-in Capital  
Recently Issued And Adopted Accounting Pronouncements [Line Items]  
Accounting for convertible instruments, Debt Modification, Increase (Decrease) in Equity, before Tax Amount 99.7
Accounting for convertible instruments, Debt Modification, Increase (Decrease) in Equity, Tax Amount 25.6
Retained Earnings  
Recently Issued And Adopted Accounting Pronouncements [Line Items]  
Accounting for convertible instruments, Debt Modification, Increase (Decrease) in Equity, before Tax Amount 42.9
Accounting for convertible instruments, Debt Modification, Increase (Decrease) in Equity, Tax Amount $ 10.6
Treasury Stock  
Recently Issued And Adopted Accounting Pronouncements [Line Items]  
Incremental shares from assumed conversion of convertible debt | shares 2.8