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Fair Value of Financial Instruments (Tables) | 12 Months Ended
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Dec. 31, 2017
Fair Value of Financial Instruments |
Schedule of assets and liabilities measured at fair value on a recurring basis |
|  | December 31, 2017 |  | December 31, 2016 |
|  | Fair Value Hierarchy |  | Fair Value Hierarchy |
(in thousands) |  | Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3 |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents(1) |  | $ | 1,301 |  | $ | 701 |  | $ | 600 |  | $ | — |  | $ | 21,035 |  | $ | 21,035 |  | $ | — |  | $ | — |
Marketable securities, current(2) |  | 57,783 |  | — |  | 57,783 |  | — |  | 54,840 |  | — |  | 54,840 |  | — |
Deferred compensation trusts(3) |  | 23,256 |  | 23,256 |  | — |  | — |  | 37,510 |  | 37,510 |  | — |  | — |
Marketable securities, noncurrent(4) |  | 113,622 |  | — |  | 113,622 |  | — |  | 143,553 |  | — |  | 143,553 |  | — |
Derivative assets(5) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commodity contracts |  | — |  | — |  | — |  | — |  | 83 |  | — |  | 83 |  | — |
Foreign currency contracts |  | 29,766 |  | — |  | 29,766 |  | — |  | 34,776 |  | — |  | 34,776 |  | — |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative liabilities(5) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commodity contracts |  | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | 129 |  | $ | — |  | $ | 129 |  | $ | — |
Foreign currency contracts |  | 29,127 |  | — |  | 29,127 |  | — |  | 43,574 |  | — |  | 43,574 |  | — |
| (1) |  | Consists of registered money market funds and investments in U.S. agency securities with maturities of three months or less at the date of purchase. The fair value of the money market funds represents the net asset value of the shares of such funds as of the close of business at the end of the period. The fair value of the investments in U.S. agency securities is based on pricing models, which are determined from a compilation of primarily observable market information, broker quotes in non-active markets or similar assets.
| (2) |  | Consists of investments in U.S. agency securities, U.S. Treasury securities, corporate debt securities and commercial paper with maturities of less than one year that are valued based on pricing models, which are determined from a compilation of primarily observable market information, broker quotes in non-active markets or similar assets.
| (3) |  | Consists of registered money market funds and an equity index fund valued at fair value. These investments, which are trading securities, represent the net asset value of the shares of such funds as of the close of business at the end of the period based on the last trade or official close of an active market or exchange.
| (4) |  | Consists of investments in U.S. agency securities, U.S. Treasury securities and corporate debt securities with maturities ranging from one year to three years that are valued based on pricing models, which are determined from a compilation of primarily observable market information, broker quotes in non-active markets or similar assets.
| (5) |  | See Note 7 for the classification of commodity and foreign currency contracts in the Consolidated Balance Sheet. Commodity and foreign currency contracts are estimated using standard pricing models with market-based inputs, which take into account the present value of estimated future cash flows.
Schedule of carrying values and estimated fair values of financial instruments not required to be measured at fair value |
|  | Fair Value |  | December 31, 2017 |  | December 31, 2016 |
(in thousands) |  | Hierarchy |  | Carrying Value |  | Fair Value |  | Carrying Value |  | Fair Value |
Assets: |  |  |  |  |  |  |  |  |  |  |
Cash(1) |  | Level 1 |  | $ | 1,104,316 |  | $ | 1,104,316 |  | $ | 1,133,295 |  | $ | 1,133,295 |
Cash equivalents(2) |  | Level 2 |  | 698,458 |  | 698,458 |  | 696,106 |  | 696,106 |
Marketable securities, current(3) |  | Level 2 |  | 103,351 |  | 103,351 |  | 56,197 |  | 56,197 |
Notes receivable, including noncurrent portion(4) |  | Level 3 |  | 26,006 |  | 26,006 |  | 29,458 |  | 29,458 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |
1.750% Senior Notes(5) |  | Level 2 |  | $ | 597,674 |  | $ | 622,277 |  | $ | 523,629 |  | $ | 551,582 |
3.375% Senior Notes(5) |  | Level 2 |  | 496,859 |  | 512,475 |  | 496,011 |  | 512,510 |
3.5% Senior Notes(5) |  | Level 2 |  | 493,320 |  | 513,480 |  | 492,360 |  | 508,230 |
Revolving Credit Facility(6) |  | Level 2 |  | — |  | — |  | 52,735 |  | 52,735 |
Other borrowings, including noncurrent portion(7) |  | Level 2 |  | 31,106 |  | 31,106 |  | 35,457 |  | 35,457 |
| (1) |  | Cash consists of bank deposits. Carrying amounts approximate fair value.
| (2) |  | Cash equivalents consist of held-to-maturity time deposits with maturities of three months or less at the date of purchase. The carrying amounts of these time deposits approximate fair value because of the short-term maturity of these instruments.
| (3) |  | Marketable securities, current consist of held-to-maturity time deposits with original maturities greater than three months that will mature within one year. The carrying amounts of these time deposits approximate fair value because of the short-term maturity of these instruments. Amortized cost is not materially different from the fair value.
| (4) |  | Notes receivable are carried at net realizable value which approximates fair value. Factors considered by the company in determining the fair value include the credit worthiness of the borrower, current interest rates, the term of the note and any collateral pledged as security. Notes receivable are periodically assessed for impairment.
| (5) |  | The fair value of the 1.750% Senior Notes, 3.375% Senior Notes and 3.5% Senior Notes were estimated based on quoted market prices for similar issues.
| (6) |  | Amounts represent borrowings under the company’s €125 million Revolving Credit Facility which expired in April 2017, as discussed in Note 8. The carrying amount of the borrowings under this revolving credit facility approximates fair value because of the short-term maturity.
| (7) |  | Other borrowings primarily represent bank loans and other financing arrangements resulting from the acquisition of Stork. See Note 18 for a further discussion of the acquisition. The majority of these borrowings mature within one year. The carrying amount of borrowings under these arrangements approximates fair value because of the short-term maturity.

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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13476-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13467-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=75026489&loc=d3e13220-108610 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14172-108612 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258 + Details
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