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Components Included in Defined Benefit Pension Plan's Net Periodic Benefit Expense (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Defined Benefit Plan Disclosure [Line Items]    
Interest cost $ 22 $ 22
Expected return on plan assets (10) (20)
Net periodic expense $ 12 $ 2