Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Other Intangible Assets [Abstract]

Goodwill rollforward

The changes in the carrying amount of goodwill by segment for the years ended December 31, 2017 and 2016 were as follows:

	Optoelectronic Components		Resistors & Inductors			Total
Balance at January 1, 2016	$	96,849	$	41,395		$	138,244
Sonntag acquisition		-		3,485			3,485
Exchange rate effects		-		(322	)		(322	)
Balance at December 31, 2016	$	96,849	$	44,558		$	141,407
Exchange rate effects		-		1,335			1,335
Balance at December 31, 2017	$	96,849		45,893			142,742

Other Intangible Assets

Other intangible assets are as follows:

	December 31,
	2017			2016
Intangible assets subject to amortization:
Patents and acquired technology	$	71,596		$	93,395
Capitalized software		54,325			53,807
Customer relationships		63,655			84,905
Tradenames		55,272			53,680
Non-competition agreements		606			1,266
		245,454			287,053
Accumulated amortization:
Patents and acquired technology		(63,868	)		(81,807	)
Capitalized software		(50,246	)		(49,388	)
Customer relationships		(26,622	)		(42,787	)
Tradenames		(34,378	)		(27,460	)
Non-competition agreements		(586	)		(1,148	)
		(175,700	)		(202,590	)
Net Intangible Assets Subject to Amortization	$	69,754		$	84,463

Estimated annual amortization expense for each of the next five years

Estimated annual amortization expense of intangible assets on the balance sheet at December 31, 2017 for each of the next five years is as follows:

2018	$	11,620
2019		7,741
2020		6,750
2021		5,863
2022		5,192