Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

Dec. 31, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Intangible Assets

Other intangible assets consist of the following:

	As of December 31, 2017
	Gross Carrying Amount		Accumulated Amortization			Net Amount		Weighted Average Remaining Amortization Period (in years)
Other intangible assets:
Customer lists / relationships	$	64,323	$	(33,685	)	$	30,638	10.5
Patents	10,319		(10,319		)	—		—
Technology and other intangibles	44,460		(10,355		)	34,105		8.3
In process research and development	2,200		—			2,200		—
Other intangible assets, net	$	121,302	$	(54,359	)	$	66,943	10.5
Amortization expense for the year ended December 31, 2017			$	6,603

	As of December 31, 2016
	Gross Carrying Amount		Accumulated Amortization			Net Amount
Other intangible assets:
Customer lists / relationships	$	63,386	$	(30,318	)	$	33,068
Patents	10,319		(10,319		)	—
Technology and other intangibles	36,715		(7,613		)	29,102
In process research and development	2,200		—			2,200
Other intangible assets, net	$	112,620	$	(48,250	)	$	64,370
Amortization expense for the year ended December 31, 2016			$	5,815
Amortization expense for the year ended December 31, 2015			$	4,035

Summary of Amortization Expense

Amortization expense remaining for other intangible assets is as follows:

	Amortization expense
2018	$	6,763
2019	6,754
2020	6,624
2021	6,467
2022	6,230
Thereafter	34,105
Total future amortization expense	$	66,943

Summary of Reconciliation of Goodwill

Changes in the net carrying value amount of goodwill were as follows:

	Total
Goodwill as of December 31, 2015	$	33,865
Increase from acquisitions	27,879
Goodwill as of December 31, 2016	61,744
Increase from acquisition	9,313
Goodwill as of December 31, 2017	$	71,057