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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	Jun. 30, 2014	Jun. 30, 2013
Net Investment Income [Line Items]
Amortized cost	$ 270,224	$ 531,497
Gross unrealized holding gains	383	154
Gross unrealized holding losses	(21)	(587)
Estimated fair value	270,586	531,064
Cash
Net Investment Income [Line Items]
Amortized cost	45,181	40,412
Estimated fair value	45,181	40,412
Cash Equivalents
Net Investment Income [Line Items]
Amortized cost	19,639	63,653
Gross unrealized holding gains	1	8
Estimated fair value	19,640	63,661
Total Cash And Cash Equivalents
Net Investment Income [Line Items]
Amortized cost	64,820	104,065
Gross unrealized holding gains	1	8
Estimated fair value	64,821	104,073
Corporate Bonds And Notes
Net Investment Income [Line Items]
Amortized cost	44,449	71,626
Gross unrealized holding gains	36	13
Gross unrealized holding losses	(11)	(15)
Estimated fair value	44,474	71,624
Municipal Bonds
Net Investment Income [Line Items]
Amortized cost	137,821	251,513
Gross unrealized holding gains	334	109
Gross unrealized holding losses	(3)	(537)
Estimated fair value	138,152	251,085
Federal Agency Issues
Net Investment Income [Line Items]
Amortized cost	23,134	104,293
Gross unrealized holding gains	12	24
Gross unrealized holding losses	(7)	(35)
Estimated fair value	$ 23,139	$ 104,282

X

- 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

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Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in equity securities classified as available-for-sale.

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-Publisher FASB

-Name Accounting Standards Codification

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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-Name Accounting Standards Codification

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