Fixed Income Securities (Tables)

12 Months Ended

Jun. 30, 2012

Fixed Income Securities [Abstract]

Schedule of fixed income securities by maturity

		June 30, 2012						June 30, 2011
		Amortized		Unrealized		Estimated		Amortized		Unrealized		Estimated
		Cost		Gains		Fair Value		Cost		Gains		Fair Value
Short-term investments: due in
	one year or less	$	40,213	$	208	$	40,421	$	43,227	$	430	$	43,657
Non-current assets: due in
	one through five years		11,924		5		11,929		49,625		769		50,394