Fair value measurement (Tables)

6 Months Ended

Jul. 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 July 2, 2017 and December 31, 2016:

	Total carrying value at July 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	$	8,252	$	8,252	$	—	$	—
Derivative assets	2,880		—		2,880		—
Derivative liabilities	489		—		489		—
Contingent consideration liabilities (1)	6,712		—		—		6,712

	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 July 2, 2017 and December 31, 2016, (a) $0.6 million of contingent consideration liabilities were recognized in the current portion of contingent consideration, and (b) $6.1 million and $6.5 million of contingent consideration liabilities, respectively, were 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 six months ended July 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	(153		)
Revaluations	(237		)
Balance - July 2, 2017	$	6,712