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Shareholders' Equity and Share-based Compensation - Shares Repurchase (Details) - USD ($) | 3 Months Ended | 9 Months Ended | 89 Months Ended
--- | --- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Mar. 31, 2018 | Mar. 31, 2017 | Mar. 31, 2018
Class of Stock [Line Items] |  |  |  |  |
Share repurchase program, authorized amount (USD in Millions) | $ 30,000,000 |  | $ 30,000,000 |  | $ 30,000,000
Shares Repurchase Program Remaining Balance | 18,000,000 |  | $ 18,000,000 |  | $ 18,000,000
Repurchase of common shares under shares repurchase program |  |  | 748,936 |  | 6,472,029
Repurchase of common shares under shares repurchase program |  |  | $ (12,016,000) |  | $ (62,800,000)
Treasury stock acquired, average price per share (in dollars per share) |  |  | $ 16.01 |  | $ 9.70
Treasury Stock, Shares, Retired |  |  | 0 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross |  |  | 0 |  |
Allocated share-based compensation expense | 2,460,000 | $ 1,715,000 | $ 8,477,000 | $ 4,585,000 |
Treasury Stock Reissued |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Treasury stock acquired, average price per share (in dollars per share) |  |  |  |  | $ 10.50
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures (in shares) |  |  |  |  | 132,353
Treasury Stock Reissued, Average Price Per Share |  |  |  |  | $ 5.83
Performance Based Restricted Stock Units (PRSUs) Member [Member] |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Allocated share-based compensation expense | $ 400,000 | $ 68,000 | $ 1,100,000 | $ 68,000 |

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- Definition Gross number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP). Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans. + References No definition available. + Details
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