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Subsequent Event (Tables) | 9 Months Ended
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Mar. 31, 2014
Subsequent Events [Abstract] |
Schedule of loss on extinguishment of debt |
​ | Redemption premium | ​ | ​ | ​ | $ | 17,184 |  | ​ | ​
​ | Write-off of original issue discount related to retired Senior Notes and BFI | ​ | ​ | ​ | ​ | 2,123 |  | ​ | ​
​ | Write-off of capitalized debt issuance costs related to retired Senior Notes, Mayflower term loan, BFI term loan and cancelled domestic senior credit facility and other items | ​ | ​ | ​ | ​ | 4,391 |  | ​ | ​
​ | Loss on extinguishment of debt | ​ | ​ | ​ | $ | 23,698 |  | ​ | ​
​ |  | ​ | ​ |  |  | ​ |  | ​
Schedule of net income per share and weighted average shares |
​ | ​ | ​ | ​ | Three Months | ​ | ​ | Nine Months | ​
​ | For the Periods Ended March 31 | ​ | ​ | 2014 | ​ | ​ | 2013 | ​ | ​ | 2014 | ​ | ​ | 2013 | ​
​ | Net income | ​ | ​ | ​ | $ | 6,370 |  | ​ | ​ | ​ | ​ | $ | 4,180 |  | ​ | ​ | ​ | ​ | $ | 14,515 |  | ​ | ​ | ​ | ​ | $ | 18,912 |  | ​ | ​
​ | Weighted average number of shares – basic | ​ | ​ | ​ | ​ | 30,458 |  | ​ | ​ | ​ | ​ | ​ | 30,458 |  | ​ | ​ | ​ | ​ | ​ | 30,458 |  | ​ | ​ | ​ | ​ | ​ | 30,458 |  | ​ | ​
​ | Dilutive effect of stock options | ​ | ​ | ​ | ​ | 158 |  | ​ | ​ | ​ | ​ | ​ | — |  | ​ | ​ | ​ | ​ | ​ | 53 |  | ​ | ​ | ​ | ​ | ​ | — |  | ​ | ​
​ | Dilutive effect of BFI warrant | ​ | ​ | ​ | ​ | 41 |  | ​ | ​ | ​ | ​ | ​ | — |  | ​ | ​ | ​ | ​ | ​ | 14 |  | ​ | ​ | ​ | ​ | ​ | — |  | ​ | ​
​ | Weighted average number of shares – diluted | ​ | ​ | ​ | ​ | 30,657 |  | ​ | ​ | ​ | ​ | ​ | 30,458 |  | ​ | ​ | ​ | ​ | ​ | 30,525 |  | ​ | ​ | ​ | ​ | ​ | 30,458 |  | ​ | ​
​ | Net income per share: | ​ | ​ | ​ | ​ | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ |  | ​ | ​
​ | basic | ​ | ​ | ​ | $ | 0.21 |  | ​ | ​ | ​ | ​ | $ | 0.14 |  | ​ | ​ | ​ | ​ | $ | 0.48 |  | ​ | ​ | ​ | ​ | $ | 0.62 |  | ​ | ​
​ | diluted | ​ | ​ | ​ | $ | 0.21 |  | ​ | ​ | ​ | ​ | $ | 0.14 |  | ​ | ​ | ​ | ​ | $ | 0.48 |  | ​ | ​ | ​ | ​ | $ | 0.62 |  | ​ | ​
​ | ​ | ​ | ​ |  |  | ​ |  | ​ | ​ |  |  | ​ |  | ​ | ​ |  |  | ​ |  | ​ | ​ |  |  | ​ |  | ​

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition Tabular disclosure of debt extinguished which may include, amount of gain (loss), the income tax effect and the per share amount of the aggregate gain (loss), net of the related income tax. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=7516071&loc=d3e13374-112631 + Details
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