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Fair Value Measurements (Tables)
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6 Months Ended |
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Sep. 30, 2014
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| Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract] |
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| Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis |
Assets measured at fair value on a recurring basis at September 30, 2014 are as follows (amounts in thousands): | | | | | | | | | | | | | | | | | | Quoted Prices in Active Markets for Identical Instruments (Level 1) | | Significant Other Observable Inputs (Level 2) | | Significant Unobservable Inputs (Level 3) | | Total Balance | Assets | | | | | | | | Money market mutual funds | $ | 95,464 |
| | $ | — |
| | $ | — |
| | $ | 95,464 |
| Corporate bonds and debt | — |
| | 899,403 |
| | 6,190 |
| | 905,593 |
| Time deposits (1) | — |
| | 20,160 |
| | — |
| | 20,160 |
| Government agency bonds | — |
| | 666,208 |
| | — |
| | 666,208 |
| Deposit accounts | — |
| | 385,975 |
| | — |
| | 385,975 |
| Municipal bonds | — |
| | 41,161 |
| | — |
| | 41,161 |
| Auction rate securities | — |
| | — |
| | 9,825 |
| | 9,825 |
| Total assets measured at fair value | $ | 95,464 |
| | $ | 2,012,907 |
| | $ | 16,015 |
| | $ | 2,124,386 |
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(1) Time deposits in various financial institutions with maturities greater than three months that will mature within one year.
Assets measured at fair value on a recurring basis at March 31, 2014 are as follows (amounts in thousands): | | | | | | | | | | | | | | | | | | Quoted Prices in Active Markets for Identical Instruments (Level 1) | | Significant Other Observable Inputs (Level 2) | | Significant Unobservable Inputs (Level 3) | | Total Balance | Assets | | | | | | | | Money market mutual funds | $ | 192,159 |
| | $ | — |
| | $ | — |
| | $ | 192,159 |
| Corporate bonds and debt | — |
| | 937,776 |
| | 6,190 |
| | 943,966 |
| Government agency bonds | — |
| | 681,394 |
| | — |
| | 681,394 |
| Deposit accounts | — |
| | 274,444 |
| | — |
| | 274,444 |
| Municipal bonds | — |
| | 41,709 |
| | — |
| | 41,709 |
| Auction rate securities | — |
| | — |
| | 9,825 |
| | 9,825 |
| Total assets measured at fair value | $ | 192,159 |
| | $ | 1,935,323 |
| | $ | 16,015 |
| | $ | 2,143,497 |
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| Reconciliation of assets and liabilities measured at fair value on a recurring basis |
The following tables present a reconciliation for all assets and liabilities measured at fair value on a recurring basis, excluding accrued interest components, using significant unobservable inputs (Level 3) for the year ended March 31, 2014 (amounts in thousands): | | | | | | | | | | | | | | | | | | Year ended March 31, 2014 | | Auction Rate Securities | | Corporate Debt | | Contingent Consideration | | Total Gains (Losses) | Balance at March 31, 2013 | | $ | 33,791 |
| | $ | 6,190 |
| | $ | (19,100 | ) | | $ | — |
| Total gains (losses) (realized and unrealized): | | | | | | | | | Included in earnings | | 1,101 |
| | — |
| | (1,370 | ) | | (269 | ) | Included in other comprehensive income | | (332 | ) | | — |
| | — |
| | (332 | ) | Purchases, sales, issuances, and settlements, net | | (24,735 | ) | | — |
| | 20,470 |
| | — |
| Balance at March 31, 2014 | | $ | 9,825 |
| | $ | 6,190 |
| | $ | — |
| | $ | (601 | ) |
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| Fair Value, by Balance Sheet Grouping |
Assets measured at fair value on a recurring basis are presented/classified on the condensed consolidated balance sheets at September 30, 2014 as follows (amounts in thousands): | | | | | | | | | | | | | | | | | | Quoted Prices in Active Markets for Identical Instruments (Level 1) | | Significant Other Observable Inputs (Level 2) | | Significant Unobservable Inputs (Level 3) | | Total Balance | Assets | | | | | | | | Cash and cash equivalents | $ | 95,464 |
| | $ | 385,975 |
| | $ | — |
| | $ | 481,439 |
| Short-term investments | — |
| | 801,670 |
| | — |
| | 801,670 |
| Long-term investments | — |
| | 825,262 |
| | 16,015 |
| | 841,277 |
| Total assets measured at fair value | $ | 95,464 |
| | $ | 2,012,907 |
| | $ | 16,015 |
| | $ | 2,124,386 |
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Assets measured at fair value on a recurring basis are presented/classified in the condensed consolidated balance sheets at March 31, 2014 as follows (amounts in thousands): | | | | | | | | | | | | | | | | | | Quoted Prices in Active Markets for Identical Instruments (Level 1) | | Significant Other Observable Inputs (Level 2) | | Significant Unobservable Inputs (Level 3) | | Total Balance | Assets | | | | | | | | Cash and cash equivalents | $ | 192,159 |
| | $ | 274,444 |
| | $ | — |
| | $ | 466,603 |
| Short-term investments | — |
| | 878,182 |
| | — |
| | 878,182 |
| Long-term investments | — |
| | 782,697 |
| | 16,015 |
| | 798,712 |
| Total assets measured at fair value | $ | 192,159 |
| | $ | 1,935,323 |
| | $ | 16,015 |
| | $ | 2,143,497 |
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