XML 38 R23.htm IDEA: XBRL DOCUMENT
v3.7.0.1

INVESTMENTS (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2017
Investments Schedule [Abstract] |
Investments | Investments consist of the following (in thousands):
|  | June 30, 2017 |  |  | December 31, 2016 |
Certificates of deposit |  | $ | 240 |  |  | $ | 960 |
Commercial paper |  |  | 55,676 |  |  |  | 49,245 |
Corporate debt securities |  |  | 352,897 |  |  |  | 204,436 |
Securities of government sponsored entities |  |  | 12,477 |  |  |  | 12,932 |
Total investments |  | $ | 421,290 |  |  | $ | 267,573 |
Summary of Investments Classified as Available-For-Sale Securities | The following is a summary of investments classified as available-for-sale securities (in thousands):
|  | Contractual Maturity (in years) |  |  | Amortized Cost |  |  | Gross Unrealized Gains(1) |  |  | Gross Unrealized Losses(1) |  |  | Aggregate Estimated Fair Value |
June 30, 2017: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Classified as current assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Certificates of deposit |  |  | Less than 1 |  |  | $ | 240 |  |  | $ | — |  |  | $ | — |  |  | $ | 240 |
Commercial paper |  |  | Less than 1 |  |  |  | 55,718 |  |  |  | — |  |  |  | (42 | ) |  |  | 55,676 |
Corporate debt securities |  |  | Less than 1 |  |  |  | 147,309 |  |  |  | 1 |  |  |  | (181 | ) |  |  | 147,129 |
Securities of government-sponsored entities |  |  | Less than 1 |  |  |  | 12,500 |  |  |  | — |  |  |  | (23 | ) |  |  | 12,477 |
Total short-term available-for-sale securities |  |  |  |  |  | $ | 215,767 |  |  | $ | 1 |  |  | $ | (246 | ) |  | $ | 215,522 |
Classified as non-current assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate debt securities |  |  | 1 to 2 |  |  | $ | 206,236 |  |  | $ | — |  |  | $ | (468 | ) |  | $ | 205,768 |
Total long-term available-for-sale securities |  |  |  |  |  | $ | 206,236 |  |  | $ | — |  |  | $ | (468 | ) |  | $ | 205,768 |
December 31, 2016: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Classified as current assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Certificates of deposit |  |  | Less than 1 |  |  | $ | 960 |  |  | $ | — |  |  | $ | — |  |  | $ | 960 |
Commercial paper |  |  | Less than 1 |  |  |  | 49,280 |  |  |  | 3 |  |  |  | (38 | ) |  |  | 49,245 |
Corporate debt securities |  |  | Less than 1 |  |  |  | 168,548 |  |  |  | 3 |  |  |  | (117 | ) |  |  | 168,434 |
Securities of government-sponsored entities |  |  | Less than 1 |  |  |  | 5,448 |  |  |  | — |  |  |  | (4 | ) |  |  | 5,444 |
Total short-term available-for-sale securities |  |  |  |  |  | $ | 224,236 |  |  | $ | 6 |  |  | $ | (159 | ) |  | $ | 224,083 |
Classified as non-current assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate debt securities |  |  | 1 to 2 |  |  | $ | 36,149 |  |  | $ | — |  |  | $ | (147 | ) |  | $ | 36,002 |
Securities of government-sponsored entities |  |  | 1 to 2 |  |  |  | 7,506 |  |  |  | — |  |  |  | (18 | ) |  |  | 7,488 |
Total long-term available-for-sale securities |  |  |  |  |  | $ | 43,655 |  |  | $ | — |  |  | $ | (165 | ) |  | $ | 43,490 |
(1) | Unrealized gains and losses are included in other comprehensive loss.
Gross Unrealized Losses and Fair Value Available-For-Sale Investments in Unrealized Loss Position | The following table presents gross unrealized losses and fair value for those available-for-sale investments that were in an unrealized loss position as of June 30, 2017 and December 31, 2016, aggregated by investment category and length of time that individual securities have been in a continuous loss position (in thousands):
|  | Less Than 12 Months |  |  | 12 Months or Greater |  |  | Total |
|  | Estimated Fair Value |  |  | Unrealized Losses |  |  | Estimated Fair Value |  |  | Unrealized Losses |  |  | Estimated Fair Value |  |  | Unrealized Losses |
June 30, 2017: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial paper |  | $ | 49,185 |  |  | $ | (42 | ) |  | $ | — |  |  | $ | — |  |  | $ | 49,185 |  |  | $ | (42 | )
Corporate debt securities |  |  | 327,596 |  |  |  | (616 | ) |  |  | 12,748 |  |  |  | (33 | ) |  |  | 340,344 |  |  |  | (649 | )
Securities of government-sponsored entities |  |  | 12,477 |  |  |  | (23 | ) |  |  | — |  |  |  | — |  |  |  | 12,477 |  |  |  | (23 | )
Total |  | $ | 389,258 |  |  | $ | (681 | ) |  | $ | 12,748 |  |  | $ | (33 | ) |  | $ | 402,006 |  |  | $ | (714 | )
December 31, 2016: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial paper |  | $ | 43,781 |  |  | $ | (38 | ) |  | $ | — |  |  | $ | — |  |  | $ | 43,781 |  |  | $ | (38 | )
Corporate debt securities |  |  | 185,243 |  |  |  | (261 | ) |  |  | 9,144 |  |  |  | (3 | ) |  |  | 194,387 |  |  |  | (264 | )
Securities of government-sponsored entities |  |  | 12,932 |  |  |  | (22 | ) |  |  | — |  |  |  | — |  |  |  | 12,932 |  |  |  | (22 | )
Total |  | $ | 241,956 |  |  | $ | (321 | ) |  | $ | 9,144 |  |  | $ | (3 | ) |  | $ | 251,100 |  |  | $ | (324 | )

X
- References No definition available. + Details
Name: | invest_InvestmentsScheduleAbstract
Namespace Prefix: | invest_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of fair value of investments in debt and equity securities in an unrealized loss position categorized neither as held-to-maturity nor trading securities. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=75019621&loc=d3e62557-112803 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27198-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=75019621&loc=d3e62586-112803 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27357-111563 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
Name: | us-gaap_ScheduleOfAvailableForSaleSecuritiesReconciliationTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration