Goodwill and Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2018

Goodwill And Intangible Assets Disclosure [Abstract]

Components of Goodwill

	Amount
Balance at January 1, 2018	$	166,678
Measurement period adjustment		(242	)
Balance at March 31, 2018	$	166,436

Components of Intangible Assets

The Company’s intangible assets consisted of the following:

		March 31, 2018							December 31, 2017
	Useful life			Accumulated							Accumulated
	(years)	Cost		amortization			Net		Cost		amortization			Net
Customer lists	5 - 15	$	113,357	$	(32,092	)	$	81,265	$	113,357	$	(29,451	)	$	83,906
Patents and    technology	5 - 10		23,424		(8,690	)		14,734		23,424		(8,080	)		15,344
Trade names and    trademarks	1 - 2		3,003		(2,944	)		59		3,003		(2,914	)		89
		$	139,784	$	(43,726	)	$	96,058	$	139,784	$	(40,445	)	$	99,339

Estimated Amortization Expense for Intangible Assets

Estimated amortization expense for intangible assets is as follows:

	Amount
2018 (remaining)	$	9,899
2019		12,860
2020		12,554
2021		12,143
2022		11,688
2023		11,438
Thereafter		25,476
	$	96,058