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Fair Value (Tables)
3 Months Ended
Jun. 30, 2012
Fair Value Disclosures [Abstract]  
Assets and liabilities measured at fair value
 
Fair Value Measurement at June 30, 2012 Using
Quoted Prices
Significant
in Active
Other
Significant
Markets for
Observable
Unobservable
June 30,
Identical Assets
Inputs
Inputs
(In thousands)
2012
(Level 1)
(Level 2)
(Level 3)
Assets:
Cash and cash equivalents - money market funds
$ 57,351 $ 57,351 $ - $ -
Short term investments - bond mutual funds
10,382 10,382 - -
$ 67,733 $ 67,733 $ - $ -