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Derivative Financial Instruments (Details) - Interest Rate Swap - Not Designated as Hedging Instrument - USD ($)
$ in Millions
4 Months Ended 6 Months Ended
Dec. 14, 2016
Dec. 19, 2018
Mar. 13, 2019
Mar. 14, 2018
Derivative [Line Items]        
Derivative, constant notional amount $ 17.5      
Derivative, fixed interest rate 1.965%      
Derivative, term of contract 5 years      
Derivative, gain (loss) on derivative, net     $ (0.1) $ 0.2
Proceeds from termination of derivative instrument   $ 0.3