Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the carrying amount of Goodwill

The changes in the carrying amount of Goodwill are as follows:



	Goodwill			Accumulated Impairment Losses			Total
Balance as of December 31, 2014	$	64,858		$	(46,503	)	$	18,355
Foreign currency fluctuations	(4,411		)	2,859			(1,552		)
Balance as of December 31, 2015	$	60,447		$	(43,644	)	$	16,803
Additions	3,787			—			3,787
Foreign currency fluctuations	(5,837		)	6,312			475
Balance as of December 31, 2016	$	58,397		$	(37,332	)	$	21,065

Acquired Intangible Assets excluding Goodwill



	Customer Lists			Trade Name			Technology			Total
Balance as of December 31, 2016
Original cost	$	8,016		$	2,000		$	5,136		$	15,152
Accumulated amortization	(5,948		)	—			(2,744		)	(8,692		)
Carrying amount	$	2,068		$	2,000		$	2,392		$	6,460
Weighted-average original life (in years)	15			15			13

Balance as of December 31, 2015
Original cost	$	19,781		$	3,859		$	6,596		$	30,236
Accumulated amortization	(19,232		)	(3,859		)	(3,950		)	(27,041		)
Carrying amount	$	549		$	—		$	2,646		$	3,195
Weighted-average original life (in years)	15			14			13

Estimated aggregate amortization expense of Intangible Assets

Estimated aggregate amortization expense based on the current carrying amount of amortizable Intangible Assets for each of the five succeeding years is as follows:



2017	$	558
2018	553
2019	553
2020	553
2021	553
Thereafter	3,690
Total	$	6,460