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Fair Value Measurement - Summary of Contractual Maturities of Available for Sale Securities (Detail) $ in Thousands | Sep. 30, 2019 USD ($)
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Schedule Of Available For Sale Securities [Line Items] |
Available for sale securities, contractual maturities less than 1 year | $ 97,025
Available for sale securities, contractual maturities between 1 to 5 years | 134,969
Available for sale securities, contractual maturities between 5 to 10 years | 49,466
Available for sale securities, contractual maturities, Total | 281,460
Corporate Bonds [Member] |
Schedule Of Available For Sale Securities [Line Items] |
Available for sale securities, contractual maturities less than 1 year | 30,040
Available for sale securities, contractual maturities between 1 to 5 years | 122,786
Available for sale securities, contractual maturities between 5 to 10 years | 21,458
Available for sale securities, contractual maturities, Total | 174,284
U.S. Treasuries [Member] |
Schedule Of Available For Sale Securities [Line Items] |
Available for sale securities, contractual maturities less than 1 year | 36,232
Available for sale securities, contractual maturities between 1 to 5 years | 804
Available for sale securities, contractual maturities, Total | 37,036
U.S. Government Agency Securities [Member] |
Schedule Of Available For Sale Securities [Line Items] |
Available for sale securities, contractual maturities less than 1 year | 5,499
Available for sale securities, contractual maturities between 1 to 5 years | 6,443
Available for sale securities, contractual maturities between 5 to 10 years | 28,008
Available for sale securities, contractual maturities, Total | 39,950
Money Market Funds [Member] |
Schedule Of Available For Sale Securities [Line Items] |
Available for sale securities, contractual maturities less than 1 year | 25,204
Available for sale securities, contractual maturities, Total | 25,204
Supranational Bonds [Member] |
Schedule Of Available For Sale Securities [Line Items] |
Available for sale securities, contractual maturities between 1 to 5 years | 4,802
Available for sale securities, contractual maturities, Total | 4,802
Asset Backed Securities [Member] |
Schedule Of Available For Sale Securities [Line Items] |
Available for sale securities, contractual maturities between 1 to 5 years | 134
Available for sale securities, contractual maturities, Total | 134
Municipal Bonds [Member] |
Schedule Of Available For Sale Securities [Line Items] |
Available for sale securities, contractual maturities less than 1 year | 50
Available for sale securities, contractual maturities, Total | $ 50

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- Definition Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in sixth through tenth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27198-111563 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=75019621&loc=d3e62586-112803 + Details
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- Definition Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27198-111563 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=75019621&loc=d3e62586-112803 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563 + Details
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