Financial instruments (Tables)

9 Months Ended

Sep. 29, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Fair Values of Derivative Instruments Designated as Hedging Instruments

The following table presents the locations in the condensed consolidated balance sheet and fair value of derivative financial instruments as of September 29, 2019 and December 31, 2018:

	September 29, 2019		December 31, 2018
	Fair Value
	(Dollars in thousands)
Asset derivatives:
Designated foreign currency forward contracts	$	998	$	1,216
Non-designated foreign currency forward contracts	289		106
Cross-currency interest rate swap	26,754		14,728
Prepaid expenses and other current assets	28,041		16,050
Cross-currency interest rate swap	23,857		—
Other assets	23,857		—
Total asset derivatives	$	51,898	$	16,050
Liability derivatives:
Designated foreign currency forward contracts	$	795	$	524
Non-designated foreign currency forward contracts	137		264
Other current liabilities	932		788
Cross-currency interest rate swap	—		7,793
Other liabilities	—		7,793
Total liability derivatives	$	932	$	8,581