Financial Instruments Measured at Fair Value (Tables)

9 Months Ended

Sep. 30, 2017

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 September 30, 2017 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%

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 September 30, 2017:

	Balance Sheet Location	Level 1		Level 2			Level 3			Total
Cash equivalents	Other assets	$	854	$	—		$	—		$	854
Available-for-sale securities	Other assets	45,112		—			—			45,112
Interest rate swaps	Other assets	—		180			—			180
Foreign exchange contracts	Other current assets	—		6,809			—			6,809
Foreign exchange contracts	Accrued expenses	—		(6,733		)	—			(6,733		)
Contingent consideration	Accrued expenses	—		—			(3,100		)	(3,100		)
		$	45,966	$	256		$	(3,100	)	$	43,122

The following table presents assets (liabilities) measured at fair value on a recurring basis at December 31, 2016:

	Balance Sheet Location	Level 1		Level 2			Level 3			Total
Cash equivalents	Other assets	$	2,660	$	—		$	—		$	2,660
Available-for-sale securities	Other assets	37,915		—			—			37,915
Interest rate swaps	Other assets	—		152			—			152
Foreign exchange contracts	Other current assets	—		4,685			—			4,685
Foreign exchange contracts	Accrued expenses	—		(3,444		)	—			(3,444		)
Contingent consideration	Accrued expenses / Other liabilities	—		—			(4,027		)	(4,027		)
		$	40,575	$	1,393		$	(4,027	)	$	37,941

Available-for-sale Securities [Text Block]

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

	September 30, 2017				December 31, 2016
	Marubun		Mutual Funds		Marubun		Mutual Funds
Cost basis	$	10,016	$	17,743	$	10,016	$	18,097
Unrealized holding gain	7,763		9,590		3,806		5,996
Fair value	$	17,779	$	27,333	$	13,822	$	24,093

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
	September 30, 2017			October 1, 2016			September 30, 2017			October 1, 2016
Loss Recognized in Consolidated Net Income
Foreign exchange contracts	$	(4,283	)	$	(2,394	)	$	(15,445	)	$	(1,873	)
Interest rate swaps	(210		)	(153		)	(532		)	(452		)
Total	$	(4,493	)	$	(2,547	)	$	(15,977	)	$	(2,325	)
Loss Recognized in Other Comprehensive Income before reclassifications
Foreign exchange contracts	$	(374	)	$	(55	)	$	(1,241	)	$	(588	)
Interest rate swaps	$	(3,619	)	$	—		$	(4,672	)	$	—