Goodwill and Intangibles (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Carrying Amount of Goodwill by Reportable Operating Segment

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

	North America		Europe			Asia Pacific			Total
Balance as of December 31, 2015	$	114,109	$	11,056		$	24,054		$	149,219
Acquisitions	7,175		—			2,972			10,147
Consolidation of joint venture	—		—			9,741			9,741
Foreign exchange translation	712		(303		)	(2,075		)	(1,666		)
Balance as of December 31, 2016	$	121,996	$	10,753		$	34,692		$	167,441
Acquisitions	178		236			—			414
Foreign exchange translation	221		1,465			2,311			3,997
Balance as of December 31, 2017	$	122,395	$	12,454		$	37,003		$	171,852

Intangible Assets and Accumulated Amortization Balances

Intangible assets and accumulated amortization balances as of December 31, 2017 and 2016 were as follows:

	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Customer relationships	$	135,927	$	(86,342	)	$	49,585
Developed technology	2,893		(2,893		)	—
Other	22,298		(2,792		)	19,506
Balance as of December 31, 2017	$	161,118	$	(92,027	)	$	69,091
Customer relationships	$	134,918	$	(73,088	)	$	61,830
Developed technology	8,762		(8,386		)	376
Other	20,965		(1,808		)	19,157
Balance as of December 31, 2016	$	164,645	$	(83,282	)	$	81,363

Estimated Amortization Expense

Estimated amortization expense for the next five years is shown in the table below:

Year	Expense
2018	$	13,598
2019	13,572
2020	7,580
2021	3,316
2022	3,316