Fair value measurement (Tables)

3 Months Ended

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