Financial Instruments Measured at Fair Value (Tables)

12 Months Ended

Dec. 31, 2017

Dec. 31, 2016

Fair Value Disclosures [Abstract]

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 December 31, 2017:

	Balance Sheet Location	Level 1		Level 2			Level 3			Total
Cash equivalents (a)	Cash and cash equivalents / other assets	$	3,267	$	286,671		$	—		$	289,938
Available-for-sale securities	Other assets	52,683		—			—			52,683
Interest rate swaps	Other liabilities	—		(149		)	—			(149		)
Foreign exchange contracts	Other current assets	—		5,499			—			5,499
Foreign exchange contracts	Accrued expenses	—		(8,581		)	—			(8,581		)
Contingent consideration	Accrued expenses	—		—			(3,176		)	(3,176		)
		$	55,950	$	283,440		$	(3,176	)	$	336,214

(a) Cash equivalents include $286,671 invested in certificates of deposit, with an original maturity of less than three months, held in anticipation of our acquisition of eInfochips, which closed in January 2018 (see Note 19).

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	—		—			(4,027		)	(4,027		)
		$	40,575	$	1,393		$	(4,027	)	$	37,941

Description of Types of Interest Rate Fair Value Hedging Instruments Used

The terms of outstanding interest rate swap contracts at December 31, 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

Available-for-sale Securities [Text Block]

The fair value of the company's available-for-sale securities is as follows at December 31:

	2017				2016
	Marubun		Mutual Funds		Marubun		Mutual Funds
Cost basis	$	10,016	$	18,454	$	10,016	$	18,097
Unrealized holdinggain	14,157		10,056		3,806		5,996
Fair value	$	24,173	$	28,510	$	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 for the years ended December 31:

	2017			2016			2015
Gain (Loss) Recognized in Income
Foreign exchange contracts	$	(20,877	)	$	1,535		$	4,755
Interest rate swaps	(831		)	(608		)	(523		)
Total	$	(21,708	)	$	927		$	4,232
Gain (Loss) Recognized in Other Comprehensive Income before reclassifications
Foreign exchange contracts	$	(2,022	)	$	(153	)	$	(1,001	)
Interest rate swaps	$	(4,672	)	$	—		$	827