Shareholders' Equity and Share-based Compensation - Shares Repurchase (Details) - USD ($) $ / shares in Units, $ in Millions		9 Months Ended	65 Months Ended
	Jul. 07, 2015	Mar. 31, 2016	Mar. 31, 2016	Jul. 08, 2015	Jun. 30, 2015	Jun. 07, 2015	Apr. 30, 2015	Mar. 31, 2015
Class of Stock [Line Items]
Shares Repurchase Program Remaining Balance				$ 18.2			$ 50.0	$ 17.8
Treasury stock acquired, shares repurchased (in shares)		4,695,499	5,723,093
Treasury Stock, Value, Acquired, Cost Method		$ 41.8	$ 50.8
Treasury stock acquired, average price per share (in dollars per share)		$ 8.90	$ 8.87
Treasury stock, Acquired, Fees and related expenses		$ 0.3
Treasury Stock, Shares, Retired			0
Treasury Stock Reissued, Average Price Per Share			$ 2.38
Treasury Stock Reissued
Class of Stock [Line Items]
Treasury stock acquired, average price per share (in dollars per share)			$ 13.86
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures (in shares)			44,345
Dutch Auction Tender Offer [Member] | Common Stock [Member]
Class of Stock [Line Items]
Share repurchase program, authorized amount (USD in Millions)						$ 30.0
Treasury stock acquired, shares repurchased (in shares)	3,296,703
Treasury Stock, Value, Acquired, Cost Method	$ 30.0
Treasury Stock, Shares, Acquired, Represent Percentage Of The Company's Common Shares Issued And Outstanding					12.53%
Treasury stock acquired, average price per share (in dollars per share)	$ 9.10
Dutch Auction Tender Offer [Member] | Minimum [Member] | Common Stock [Member]
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Cost Per Share						$ 8.50
Dutch Auction Tender Offer [Member] | Maximum [Member] | Common Stock [Member]
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Cost Per Share						$ 9.20