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Debt (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Sep. 30, 2014 | Jun. 30, 2014
Line of Credit Facility [Line Items] |  |  |  |
Borrowing Capacity, Future Periods | $ 850,000 |  |  |
Short-term debt | 14,384 |  | 37,575 |
Long-term debt | 433,486 | [1] | 410,484 | [1]
Debt, Carrying Value | 447,870 |  | 448,059 |
Description of variable rate basis | LIBOR |  |  |
Line of Credit [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Maximum borrowing capacity | 25,000 |  |  |
Short-term debt | 6,500 |  | 21,200 |
Basis spread on LIBOR | 1.20% |  |  |
Weighted average interest rate | 1.32% |  |  |
Short-term Debt [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Debt Instrument, Unamortized Discount | 116 |  |  |
Term Loan [Domain] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Long-term Debt, Gross | 160,000 |  |  |
Line of Credit [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Current borrowing capacity | 850,000 |  |  |
Current portion of long-term debt | 7,884 | [1] | 16,375 | [1]
Senior unsecured revolving credit facility [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Weighted average interest rate | 2.18% |  |  |
Senior unsecured revolving credit facility [Member] | Minimum [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Basis spread on LIBOR | 1.50% |  |  |
Commitment fee (percentage) | 0.225% |  |  |
Senior leverage ratio, current year | 1.00 |  |  |
Interest coverage ratio | 100.00% |  |  |
Senior unsecured revolving credit facility [Member] | Maximum [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Basis spread on LIBOR | 2.25% |  |  |
Commitment fee (percentage) | 0.40% |  |  |
Senior leverage ratio, current year | 4.50 |  |  |
Interest coverage ratio | 300.00% |  |  |
Secured Debt [Member] | Minimum [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Senior leverage ratio, current year | 1.00 |  |  |
Secured Debt [Member] | Maximum [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Senior leverage ratio, current year | 3.25 |  |  |
Long-term Debt [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Debt Instrument, Unamortized Discount | 464 |  |  |
Revolving Loan, Maturity September 23, 2019 [Member] | Line of Credit [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Maximum borrowing capacity | $ 690,000 |  |  |
[1] | (1) Balances as of September 30, 2014 are inclusive of short-term and long-term debt discounts of $116 and $464, respectively.

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