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Equity Transactions - Vesting (Details) $ in Millions	3 Months Ended			6 Months Ended
	Dec. 31, 2017 USD ($) item	Jun. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2017 USD ($)
Employee and Non Employees Stock Option
Equity Transactions
Intrinsic value of options exercised					$ 0.1
Unrecognized compensation	$ 1.2			$ 1.2
Weighted average period for recognition of total unrecognized compensation expense related to unvested stock options granted				1 year 3 months 18 days
Stock based compensation expense	0.4		$ 0.5	$ 0.8	1.1
Restricted Stock
Equity Transactions
Unrecognized compensation	22.0			$ 22.0
Weighted average period for recognition of total unrecognized compensation expense related to unvested stock options granted				1 year 7 months 6 days
Stock based compensation expense	3.9		4.2	$ 7.8	8.2
Performance Share Units
Equity Transactions
Unrecognized compensation	1.4			1.4
Stock based compensation expense	3.0	$ 3.8	$ 0.0	3.5	$ 0.0
Performance Shares Tranche #2
Equity Transactions
Unrecognized compensation						$ 3.5
Stock based compensation expense	$ 2.5			$ 0.0
Number of performance measures | item	2
Quarterly Period Beginning November 15, 2017 | Performance Share Units
Equity Transactions
Earned award vesting percentage				30.00%
Period After August 15, 2018 | Performance Share Units
Equity Transactions
Earned award vesting percentage				70.00%
Maximum
Equity Transactions
Vesting period.				3 years
Minimum
Equity Transactions
Vesting period.				2 years

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Percentage of vesting of share-based compensation awards.

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