Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2018

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Intangible Assets

Other intangible assets consist of the following:

	As of December 31, 2018
	Gross Carrying Amount		Accumulated Amortization			Net Amount		Weighted Average Remaining Amortization Period (in years)
Other intangible assets:
Customer lists / relationships	$	64,323	$	(37,088	)	$	27,235	9.6
Technology and other intangibles	44,460		(13,715		)	30,745		10.1
In process research and development	2,200		—			2,200		—
Other intangible assets, net	$	110,983	$	(50,803	)	$	60,180	9.8
Amortization expense for the year ended December 31, 2018			$	6,817

	As of December 31, 2017
	Gross Carrying Amount		Accumulated Amortization			Net Amount
Other intangible assets:
Customer lists / relationships	$	64,323	$	(33,685	)	$	30,638
Patents	10,319		(10,319		)	—
Technology and other intangibles	44,460		(10,355		)	34,105
In process research and development	2,200		—			2,200
Other intangible assets, net	$	121,302	$	(54,359	)	$	66,943
Amortization expense for the year ended December 31, 2017			$	6,603
Amortization expense for the year ended December 31, 2016			$	5,815

Summary of Amortization Expense

Amortization expense remaining for other intangible assets is as follows:

	Amortization expense
2019	$	6,754
2020	6,624
2021	6,467
2022	6,230
2023	4,225
Thereafter	29,880
Total future amortization expense	$	60,180

Summary of Reconciliation of Goodwill

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

	Total
Goodwill as of December 31, 2016	$	61,744
Increase from acquisitions	9,313
Goodwill as of December 31, 2017	71,057
Increase from acquisition	—
Goodwill as of December 31, 2018	$	71,057