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Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands | Jun. 30, 2015 | Jun. 30, 2014
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Mutual funds | $ 17,227 |
Mutual funds, fair value | 17,227 |
Held-to-maturity securities, remaining maturities from 1-3 years | 2,073 |
Held-to-maturity securities, remaining maturities from 1-3 years, fair value | 2,057 |
Held-to-maturity securities, remaining maturities from 3-5 years | 1,453 |
Held-to-maturity securities, remaining maturities from 3-5 years, fair value | 1,438 |
Held-to-maturity securities, 1-90 days | 1,496 |
Held-to-maturity securities, 1-90 days, fair value | 1,496 |
Held-to-maturity securities, 91-360 days | 4,438 |
Held-to-maturity securities, 91-360 days, fair value | 4,440 |
Held-to-maturity securities, over 360 days | 4,990 |
Held-to-maturity securities, over 360 days, fair value | 4,993 |
Notes payable |  | $ 5,655
Notes payable, fair value |  | 5,655
Investments | 31,677 | 5,655
Investments, fair value | 31,651 | 5,655
Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Mutual funds, fair value | 17,227 |
Investments, fair value | 17,227 |
Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Held-to-maturity securities, remaining maturities from 1-3 years, fair value | 2,057 |
Held-to-maturity securities, remaining maturities from 3-5 years, fair value | 1,438 |
Held-to-maturity securities, 1-90 days, fair value | 1,496 |
Held-to-maturity securities, 91-360 days, fair value | 4,440 |
Held-to-maturity securities, over 360 days, fair value | 4,993 |
Notes payable, fair value |  | 5,655
Investments, fair value | $ 14,424 | $ 5,655

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