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Fair value measurement (Tables) | 3 Months Ended
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Apr. 02, 2017
Fair Value Disclosures [Abstract] |
Financial Assets and Liabilities Carried at Fair Value Measured on Recurring Basis | The following tables provide information regarding the Company's financial assets and liabilities that are measured at fair value on a recurring basis as of April 2, 2017 and December 31, 2016:
| Total carrying value at April 2, 2017 |  | Quoted prices in active markets (Level 1) |  | Significant other observable Inputs (Level 2) |  | Significant unobservable Inputs (Level 3)
| (Dollars in thousands)
Investments in marketable securities | $ | 8,048 |  |  | $ | 8,048 |  |  | $ | — |  |  | $ | — |
Derivative assets | 2,206 |  |  | — |  |  | 2,206 |  |  | — |
Derivative liabilities | 1,892 |  |  | — |  |  | 1,892 |  |  | — |
Contingent consideration liabilities (1) | 7,202 |  |  | — |  |  | — |  |  | 7,202 |
| Total carrying value at December 31, 2016 |  | Quoted prices in active markets (Level 1) |  | Significant other observable Inputs (Level 2) |  | Significant unobservable Inputs (Level 3)
| (Dollars in thousands)
Investments in marketable securities | $ | 7,660 |  |  | $ | 7,660 |  |  | $ | — |  |  | $ | — |
Derivative assets | 1,157 |  |  | — |  |  | 1,157 |  |  | — |
Derivative liabilities | 2,257 |  |  | — |  |  | 2,257 |  |  | — |
Contingent consideration liabilities (1) | 7,102 |  |  | — |  |  | — |  |  | 7,102 |
(1) | As of April 2, 2017 and December 31, 2016, $0.7 million and $0.6 million was recorded as the current portion of contingent consideration, respectively, and $6.5 million was recognized in other liabilities in the condensed consolidated balance sheet.
Reconciliation of Changes in Level 3 Financial Liabilities Measured at Fair Value on Recurring Basis | The following table provides information regarding changes, during the three months ended April 2, 2017, in Level 3 financial liabilities related to contingent consideration, which are described below in this Note 9 under "Valuation Techniques":
| Contingent consideration
| 2017
| (Dollars in thousands)
Balance - December 31, 2016 | $ | 7,102 |
Payment | (79 | )
Revaluations | 179 |
Balance - April 2, 2017 | $ | 7,202 |

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- Definition Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19279-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + 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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