FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Summary Of Financial Assets At Fair Value) (Details) (USD $)	3 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Jun. 30, 2013
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Gain on Sale of Investments	$ 0	$ 0
Total Investments	155,626,000		148,046,000
Level 1 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Investments	35,175,000		60,352,000
Level 2 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Investments	120,451,000		87,694,000
Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Investments	155,626,000		148,046,000
U.S. Government Debt Securities [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Investments	35,175,000		65,352,000
U.S. Government Debt Securities [Member] | Level 1 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Investments	35,175,000		60,352,000
U.S. Government Debt Securities [Member] | Level 2 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Investments	0		5,000,000
U.S. Government Debt Securities [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Investments	35,175,000		65,352,000
International [Member] | Time Deposits [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Investments	43,688,000		28,832,000
International [Member] | Time Deposits [Member] | Level 1 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Investments	0		0
International [Member] | Time Deposits [Member] | Level 2 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Investments	43,688,000		28,832,000
International [Member] | Time Deposits [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Investments	43,688,000		28,832,000
Domestic [Member] | Time Deposits [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Investments	76,763,000		53,862,000
Domestic [Member] | Time Deposits [Member] | Level 1 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Investments	0		0
Domestic [Member] | Time Deposits [Member] | Level 2 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Investments	76,763,000		53,862,000
Domestic [Member] | Time Deposits [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Total Investments	$ 76,763,000		$ 53,862,000