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Marketable Investment Securities (Tables) | 9 Months Ended
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Mar. 31, 2014
Schedule of Fair Value for Available-for-Sale Securities by Major Security Type and Class of Security | The amortized cost, gross unrealized holding gains, gross unrealized holding losses, and fair value for available-for-sale securities by major security type and class of security at March 31, 2014 and June 30, 2013 were as follows:
|  |  |  |  | Gross |  |  | Gross |  |  |  |
|  |  |  |  | unrealized |  |  | unrealized |  |  |  |
|  | Amortized |  |  | holding |  |  | holding |  |  | Estimated |
(In thousands) |  | cost |  |  | gains |  |  | losses |  |  | fair value |
At March 31, 2014: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash |  | $ | 82,536 |  |  | $ | — |  |  | $ | — |  |  | $ | 82,536 |
Cash equivalents |  |  | 3,262 |  |  |  | — |  |  |  | — |  |  |  | 3,262 |
Total cash and cash equivalents |  |  | 85,798 |  |  |  | — |  |  |  | — |  |  |  | 85,798 |
Available-for-sale securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate bonds and notes |  |  | 49,396 |  |  |  | 43 |  |  |  | (3 | ) |  |  | 49,436 |
Municipal bonds |  |  | 123,997 |  |  |  | 286 |  |  |  | (8 | ) |  |  | 124,275 |
Federal agency issues |  |  | 18,187 |  |  |  | 17 |  |  |  |  |  |  |  | 18,204 |
Total available-for-sale securities |  |  | 191,580 |  |  |  | 346 |  |  |  | (11 | ) |  |  | 191,915 |
Total cash, cash equivalents and available-for-sale securities |  | $ | 277,378 |  |  | $ | 346 |  |  | $ | (11 | ) |  | $ | 277,713 |
|  |  |  |  | Gross |  |  | Gross |  |  |  |
|  |  |  |  | unrealized |  |  | unrealized |  |  |  |
|  | Amortized |  |  | holding |  |  | holding |  |  | Estimated |
(In thousands) |  | cost |  |  | gains |  |  | losses |  |  | fair value |
At June 30, 2013: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash |  | $ | 40,412 |  |  | $ | — |  |  | $ | — |  |  | $ | 40,412 |
Cash equivalents |  |  | 63,653 |  |  |  | 8 |  |  |  | — |  |  |  | 63,661 |
Total cash and cash equivalents |  |  | 104,065 |  |  |  | 8 |  |  |  | — |  |  |  | 104,073 |
Available-for-sale securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate bonds and notes |  |  | 71,626 |  |  |  | 13 |  |  |  | (15 | ) |  |  | 71,624 |
Municipal bonds |  |  | 251,513 |  |  |  | 109 |  |  |  | (537 | ) |  |  | 251,085 |
Federal agency issues |  |  | 104,293 |  |  |  | 24 |  |  |  | (35 | ) |  |  | 104,282 |
Total available-for-sale securities |  |  | 427,432 |  |  |  | 146 |  |  |  | (587 | ) |  |  | 426,991 |
Total cash, cash equivalents and available-for-sale securities |  | $ | 531,497 |  |  | $ | 154 |  |  | $ | (587 | ) |  | $ | 531,064 |
Schedule of Maturities of Debt Securities Classified as Cash Equivalents and Available-For-Sale | Cash, cash equivalents, and maturities of debt securities classified as available-for-sale securities are as follows at March 31, 2014:
|  | Amortized |  |  | Estimated |
(In thousands) |  | cost |  |  | fair value |
Cash |  | $ | 82,536 |  |  | $ | 82,536 |
Cash equivalents |  |  | 3,262 |  |  |  | 3,262 |
Available-for-sale: |  |  |  |  |  |  |  |
Due within one year |  |  | 126,235 |  |  |  | 126,360 |
Due after one year through five years |  |  | 65,345 |  |  |  | 65,555 |
Due after five years |  |  | — |  |  |  | — |
|  | $ | 277,378 |  |  | $ | 277,713 |

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