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Held to Maturity Securities in Continuous Unrealized Loss Position (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 Months, Fair Value	$ 15,209
Less than 12 Months, Unrealized Losses	(15)
12 Months or Longer, Fair Value	0
12 Months or Longer, Unrealized Losses	0
Fair Value	15,209
Unrealized Losses	(15)
U.S. Agency securities
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 Months, Fair Value	15,209
Less than 12 Months, Unrealized Losses	(15)
12 Months or Longer, Fair Value	0
12 Months or Longer, Unrealized Losses	0
Fair Value	15,209
Unrealized Losses	$ (15)

X

- Definition

Amount of accumulated unrealized loss on 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 (c)

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- Definition

Amount of accumulated unrealized loss on investments in debt securities classified as held-to-maturity that have been in a continuous loss position for twelve months or longer.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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-Section 50

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+ References

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

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-Name Accounting Standards Codification

-Topic 320

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-Section 50

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+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

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-Section 50

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-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563



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-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

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-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563



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