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 |