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Consolidated Statements of Total Equity (Unaudited) Statement - USD ($)
$ in Millions
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Noncontrolling Interest [Member]
Beginning balances (shares) at Sep. 30, 2018   41,939,403      
Stock issued under employee incentive plans (shares)   20,463      
Ending balances (shares) at Dec. 31, 2018   41,959,866      
Beginning balances at Sep. 30, 2018 $ 674.5 $ 41.9 $ 506.3 $ 125.1 $ 1.2
Net income 3.9 0.0 0.0 3.3 0.6
Stock issued under employee incentive plans (0.1) 0.1 0.0 0.0 0.0
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation (0.1) 0.0 0.1 0.0 0.0
Stock-based compensation expense 0.1 0.0 0.1 0.0 0.0
Distributions to noncontrolling interests (0.5) 0.0 0.0 0.0 (0.5)
Ending balances at Dec. 31, 2018 678.0 $ 42.0 506.3 128.4 1.3
Beginning balances (shares) at Sep. 30, 2019   47,997,366      
Stock issued under employee incentive plans (shares)   27,993      
Ending balances (shares) at Dec. 31, 2019   48,025,359      
Beginning balances at Sep. 30, 2019 808.9 $ 48.0 602.2 158.1 0.6
Net income 16.8 0.0 0.0 16.9 (0.1)
Stock issued under employee incentive plans 0.0 0.0 0.0 0.0 0.0
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation (0.2) 0.0 0.2 0.0 0.0
Stock-based compensation expense 0.5 0.0 0.5 0.0 0.0
Distributions to noncontrolling interests (0.4) 0.0 0.0 0.0 (0.4)
Ending balances at Dec. 31, 2019 $ 825.6 $ 48.0 $ 602.5 $ 175.0 $ 0.1