DERIVATIVES AND FAIR VALUE MEASUREMENTS (Schedule of Financial Assets and Financial Liabilities Measured at Fair Value on a Recurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012
Assets
Money market funds	$ 194,574
Foreign currency hedge contracts	6,186
Assets, Fair Value Disclosure, Total	200,760
Liabilities
Foreign currency hedge contracts	1,185
Other liabilities - contingent consideration	0
Liabilities, Fair Value Disclosure, Total	1,185
Quoted Market Prices for Identical Assets (Level 1) [Member]
Assets
Money market funds	194,574
Foreign currency hedge contracts	0
Assets, Fair Value Disclosure, Total	194,574
Liabilities
Foreign currency hedge contracts	0
Other liabilities - contingent consideration	0
Liabilities, Fair Value Disclosure, Total	0
Significant Other Observable Inputs (Level 2) [Member]
Assets
Money market funds	0
Foreign currency hedge contracts	6,186
Assets, Fair Value Disclosure, Total	6,186
Liabilities
Foreign currency hedge contracts	1,185
Other liabilities - contingent consideration	0
Liabilities, Fair Value Disclosure, Total	1,185
Significant Unobervable Inputs (Level 3) [Member]
Assets
Money market funds	0
Foreign currency hedge contracts	0
Assets, Fair Value Disclosure, Total	0
Liabilities
Foreign currency hedge contracts	0
Other liabilities - contingent consideration	0
Liabilities, Fair Value Disclosure, Total	$ 0