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Income Taxes - Components of the Temporary Differences (Details) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2010
--- | --- | --- | ---
Deferred Tax Assets: [Abstract] |  |  |
Postretirement benefits | $ 32,481 | $ 20,226 | $ 27,589
Accrued liabilities | 3,958 | 4,138 | 4,376
Capital loss carryforward | 2,865 | 2,945 | 1,971
Net operating loss carryforward | 47,114 | 37,170 | 17,261
Intangible assets | 919 | 0 | 0
Other | 1,295 | 4,328 | 2,464
Total deferred tax assets | 88,632 | 68,807 | 53,661
Deferred tax liabilities: [Abstract] |  |  |
Fixed assets | (4,117) | (7,881) | (5,551)
Intangible Assets | 0 | (1,032) | (4,498)
Other | (794) | (814) | (726)
Total deferred tax liabilities | (4,911) | (9,727) | (10,775)
Valuation allowance | (84,954) | (60,390) | (43,860)
Net deferred tax (liability) asset | $ (1,233) | $ (1,310) | $ (974)

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