v2.4.0.8

Amortized Cost and Fair Value of Held to Maturity Investments (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Sep. 30, 2012
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 63,529	$ 55,988
HeldToMaturitySecuritiesGrossUnrecognizedHoldingGains	18	13
HeldToMaturitySecuritiesGrossUnrecognizedHoldingLosses	(28)	(11)
Estimated Fair Market Value	63,519	55,990
Municipal bonds, due in less than 1 year
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	27,085	23,402
HeldToMaturitySecuritiesGrossUnrecognizedHoldingGains	11	2
HeldToMaturitySecuritiesGrossUnrecognizedHoldingLosses	0	(8)
Estimated Fair Market Value	27,096	23,396
Corporate bonds, due in less than 1 year
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	16,239	18,210
HeldToMaturitySecuritiesGrossUnrecognizedHoldingGains	1	8
HeldToMaturitySecuritiesGrossUnrecognizedHoldingLosses	(23)	(3)
Estimated Fair Market Value	16,217	18,215
Certificates of deposit, due in less than 1 year
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	6,093	9,843
HeldToMaturitySecuritiesGrossUnrecognizedHoldingGains	0	3
HeldToMaturitySecuritiesGrossUnrecognizedHoldingLosses	0	0
Estimated Fair Market Value	6,093	9,846
Municipal bonds, due in 1 - 2 years
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	12,008	170
HeldToMaturitySecuritiesGrossUnrecognizedHoldingGains	6	0
HeldToMaturitySecuritiesGrossUnrecognizedHoldingLosses	(4)	0
Estimated Fair Market Value	12,010	170
Corporate bonds, due in 1-2 years
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	628	0
HeldToMaturitySecuritiesGrossUnrecognizedHoldingGains	0	0
HeldToMaturitySecuritiesGrossUnrecognizedHoldingLosses	(1)	0
Estimated Fair Market Value	627	0
Certificates of deposit, due in 1- 2 years
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	1,476	4,363
HeldToMaturitySecuritiesGrossUnrecognizedHoldingGains	0	0
HeldToMaturitySecuritiesGrossUnrecognizedHoldingLosses	0	0
Estimated Fair Market Value	$ 1,476	$ 4,363

X

- Definition

Amount before other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity.

+ References

No definition available.

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X

- Definition

Fair value of investments in debt securities classified as held-to-maturity.

+ References

Reference 1: 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 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 5

-Subparagraph (f)

-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 50

-Paragraph 5

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563

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- Definition

Amount of unrecognized gain before loss on investments in held-to-maturity securities.

+ References

No definition available.

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- Definition

Amount of unrecognized loss before gain on investments in held-to-maturity securities. Excludes write-down for other than temporary impairment (OTTI).

+ References

No definition available.

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