Financial Instruments Measured at Fair Value (Tables)

9 Months Ended

Oct. 01, 2016

Fair Value Disclosures [Abstract]

Description of Types of Interest Rate Fair Value Hedging Instruments Used

The terms of our outstanding interest rate swap contracts at October 1, 2016 are as follows:

Maturity Date	Notional Amount	Interest rate due from counterparty	Interest rate due to counterparty
April 2020	50,000	6.000%	6 mo. USD LIBOR + 3.896
June 2018	50,000	6.875%	6 mo. USD LIBOR + 5.301

Schedule of Fair Value Assets and Liabilities Measured on Recurring Basis Table [Text Block]

The following table presents assets (liabilities) measured at fair value on a recurring basis at October 1, 2016:

	Balance Sheet Location	Level 1		Level 2			Level 3			Total
Cash equivalents	Other assets	$	3,525	$	—		$	—		$	3,525
Available-for-sale securities	Other assets	37,403		—			—			37,403
Interest rate swaps	Other assets	—		1,373			—			1,373
Foreign exchange contracts	Other current assets	—		1,179			—			1,179
Foreign exchange contracts	Accrued expenses	—		(2,047		)	—			(2,047		)
Contingent consideration	Accrued expenses	—		—			(4,197		)	(4,197		)
		$	40,928	$	505		$	(4,197	)	$	37,236

The following table presents assets (liabilities) measured at fair value on a recurring basis at December 31, 2015:

	Balance Sheet Location	Level 1		Level 2			Level 3			Total
Cash equivalents	Other assets	$	1,559	$	—		$	—		$	1,559
Available-for-sale securities	Other assets	41,178		—			—			41,178
Interest rate swaps	Other assets	—		711			—			711
Foreign exchange contracts	Other current assets	—		2,625			—			2,625
Foreign exchange contracts	Accrued expenses	—		(3,363		)	—			(3,363		)
Contingent consideration	Accrued expenses	—		—			(3,889		)	(3,889		)
		$	42,737	$	(27	)	$	(3,889	)	$	38,821

Available-for-sale Securities [Text Block]

The fair value of the company's available-for-sale securities is as follows:

	October 1, 2016				December 31, 2015
	Marubun		Mutual Funds		Marubun		Mutual Funds
Cost basis	$	10,016	$	17,535	$	10,016	$	17,389
Unrealized holding gain	3,515		6,337		8,708		5,065
Fair value	$	13,531	$	23,872	$	18,724	$	22,454

Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance [Text Block]

The effects of derivative instruments on the company's consolidated statements of operations and other comprehensive income are as follows:

	Quarter Ended						Nine Months Ended
	October 1, 2016			September 26, 2015			October 1, 2016			September 26, 2015
Gain (Loss) Recognized in Income
Foreign exchange contracts	$	(2,394	)	$	4,440		$	(1,873	)	$	3,383
Interest rate swaps	(153		)	(144		)	(452		)	(377		)
Total	$	(2,547	)	$	4,296		$	(2,325	)	$	3,006
Gain (Loss) Recognized in Other Comprehensive Income before reclassifications
Foreign exchange contracts	$	(55	)	$	170		$	(588	)	$	607
Interest rate swaps	$	—		$	—		$	—		$	827