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Cash, Cash Equivalents, and Investments - Summary of Available-for-Sale Investments (Detail) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2013
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Schedule of Available-for-sale Securities [Line Items] |
Amortized Cost | $ 375,053
Gross Unrealized Gains | 611
Gross Unrealized Losses | (1,391)
Fair Value | 374,273
Corporate Bonds [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Fair Value | 190,166
Corporate Bonds [Member] | Short-Term Investments [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Amortized Cost | 80,547
Gross Unrealized Gains | 119
Gross Unrealized Losses | (280)
Fair Value | 80,386
Corporate Bonds [Member] | Long-Term Investments [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Amortized Cost | 109,785
Gross Unrealized Gains | 373
Gross Unrealized Losses | (378)
Fair Value | 109,780
Asset-Backed Securities [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Fair Value | 68,176
Asset-Backed Securities [Member] | Short-Term Investments [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Amortized Cost | 27,076
Gross Unrealized Gains | 6
Gross Unrealized Losses | (172)
Fair Value | 26,910
Asset-Backed Securities [Member] | Long-Term Investments [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Amortized Cost | 41,539
Gross Unrealized Gains | 6
Gross Unrealized Losses | (279)
Fair Value | 41,266
Municipal Bonds [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Fair Value | 28,583
Municipal Bonds [Member] | Short-Term Investments [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Amortized Cost | 14,416
Gross Unrealized Gains | 28
Gross Unrealized Losses | (1)
Fair Value | 14,443
Municipal Bonds [Member] | Long-Term Investments [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Amortized Cost | 14,110
Gross Unrealized Gains | 62
Gross Unrealized Losses | (32)
Fair Value | 14,140
Sovereign Bonds [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Fair Value | 30,435
Sovereign Bonds [Member] | Short-Term Investments [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Amortized Cost | 7,396
Gross Unrealized Losses | (13)
Fair Value | 7,383
Sovereign Bonds [Member] | Long-Term Investments [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Amortized Cost | 23,199
Gross Unrealized Gains | 17
Gross Unrealized Losses | (164)
Fair Value | 23,052
Commercial Paper [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Fair Value | 3,000
Commercial Paper [Member] | Short-Term Investments [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Amortized Cost | 3,000
Fair Value | 3,000
Agency Bonds [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Fair Value | 1,498
Agency Bonds [Member] | Short-Term Investments [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Amortized Cost | 1,498
Fair Value | 1,498
Treasury Bills [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Fair Value | 52,415
Treasury Bills [Member] | Long-Term Investments [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Amortized Cost | 52,487
Gross Unrealized Losses | (72)
Fair Value | $ 52,415

X
- Definition Amount of accumulated pre-tax unrealized gain before deducting pre-tax unrealized losses on investments in available-for-sale securities impacting investments. + References No definition available. + Details
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- Definition Amount of accumulated pre-tax unrealized loss before deducting pre-tax unrealized gain on investments in available-for-sale securities impacting investments. + References No definition available. + Details
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- Definition This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References No definition available. + Details
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- Definition Amount of debt securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 2 -Subparagraph (b)-(g) -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803 + Details
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