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Schedule of Fair Value for Available-for-Sale Securities by Major Security Type and Class of Security (Detail) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2014 | Jun. 30, 2014
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Schedule of Available-for-sale Securities [Line Items] |  |
Amortized cost | $ 236,127 | $ 270,224
Gross unrealized holding gains | 254 | 383
Gross unrealized holding losses | (24) | (21)
Estimated fair value | 236,357 | 270,586
Cash |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized cost | 63,238 | 45,181
Estimated fair value | 63,238 | 45,181
Cash Equivalents |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized cost | 6,565 | 19,639
Gross unrealized holding gains |  | 1
Estimated fair value | 6,565 | 19,640
Restricted Cash |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized cost | 22,674 |
Estimated fair value | 22,674 |
Total Cash, Cash Equivalents and Restricted Cash |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized cost | 92,477 |
Estimated fair value | 92,477 |
Total Cash And Cash Equivalents |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized cost |  | 64,820
Gross unrealized holding gains |  | 1
Estimated fair value |  | 64,821
Corporate Bonds And Notes |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized cost | 43,157 | 44,449
Gross unrealized holding gains | 21 | 36
Gross unrealized holding losses | (18) | (11)
Estimated fair value | 43,160 | 44,474
Municipal Bonds |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized cost | 85,412 | 137,821
Gross unrealized holding gains | 225 | 334
Gross unrealized holding losses | (3) | (3)
Estimated fair value | 85,634 | 138,152
Federal Agency Issues |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized cost | 15,081 | 23,134
Gross unrealized holding gains | 8 | 12
Gross unrealized holding losses | (3) | (7)
Estimated fair value | 15,086 | 23,139
Total Available For Sale |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized cost | 143,650 | 205,404
Gross unrealized holding gains | 254 | 382
Gross unrealized holding losses | (24) | (21)
Estimated fair value | $ 143,880 | $ 205,765

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- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in equity securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
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- Definition Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in equity securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
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- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 + Details
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- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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