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Borrowings (Details) (USD $)
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9 Months Ended | 3 Months Ended | 9 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
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Mar. 31, 2013
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Jun. 30, 2012
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Mar. 31, 2013
Revolving credit facility
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Mar. 31, 2013
Revolving credit facility
LIBOR
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Mar. 31, 2013
Revolving credit facility
LIBOR
Minimum
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Mar. 31, 2013
Revolving credit facility
LIBOR
Maximum
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Mar. 31, 2013
Bank lines-of-credit
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Sep. 30, 2012
Seven-year term loan due in fiscal 2020
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Mar. 31, 2013
Seven-year term loan due in fiscal 2020
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Mar. 31, 2013
Seven-year term loan due in fiscal 2020
LIBOR
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| Borrowings | ||||||||||
| Maximum borrowing capacity | $ 425,000,000 | |||||||||
| Sub-limit available for letters of credit | 375,000,000 | |||||||||
| Increase in the credit agreement's borrowing capacity available under certain circumstances | 100,000,000 | |||||||||
| Variable basis rate | LIBOR | LIBOR | ||||||||
| Interest rate margin (as a percent) | 1.50% | 1.50% | 2.00% | 1.25% | ||||||
| Unused commitment fee (as a percent) | 0.25% | |||||||||
| Amount outstanding | 55,000,000 | 55,000,000 | ||||||||
| Amount outstanding under letters-of-credit | 185,600,000 | 6,300,000 | ||||||||
| Effective interest rate (as a percent) | 2.20% | |||||||||
| Available credit facility | 35,600,000 | |||||||||
| Total cash borrowing sub-limit | 4,100,000 | |||||||||
| Principal amount | 11,100,000 | |||||||||
| Term of loan | 7 years | |||||||||
| Long-term debt | 12,894,000 | 2,682,000 | 10,400,000 | |||||||
| Less current portion of long-term debt | 1,795,000 | 215,000 | ||||||||
| Long-term portion of debt | $ 11,099,000 | $ 2,467,000 | ||||||||