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Fair Values by Asset Category of Defined Benefit Pension Plan (Detail) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2010
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Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Fair value of defined benefit pension plan by asset category | $ 1,682 |  | $ 1,716 | $ 1,649
Cash and Cash Equivalents |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Fair value of defined benefit pension plan by asset category | 104 |  |  |
Equity Securities |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Fair value of defined benefit pension plan by asset category | 911 | [1] |  |
Debt Securities |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Fair value of defined benefit pension plan by asset category | 667 | [2] |  |
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Fair value of defined benefit pension plan by asset category | 1,682 |  |  |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Cash and Cash Equivalents |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Fair value of defined benefit pension plan by asset category | 104 |  |  |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity Securities |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Fair value of defined benefit pension plan by asset category | 911 | [1] |  |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Debt Securities |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Fair value of defined benefit pension plan by asset category | $ 667 | [2] |  |
[1] | This category is comprised of publicly traded funds, of which 77% are large-cap funds, 14% are emerging markets equity funds, and 9% are international equity funds.
[2] | This category is comprised of publicly traded funds, of which 31% are short-term fixed income funds, 32% are high-yield fixed income funds, 11% are intermediate fixed income funds, 9% are international/emerging markets funds and 17% are REITs and MLPs funds.

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- Definition Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 35 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=6867990&loc=d3e12355-114930 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d(iv)(b)(i) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 49 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920 + Details
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