Goodwill and Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2017

Goodwill And Intangible Assets Disclosure [Abstract]

Components of Goodwill

Goodwill consisted of the following:

	Amount
Balance at January 1, 2017	$	114,033
Additions through acquisitions		23,364
Balance at June 30, 2017	$	137,397

Components of Intangible Assets

The Company’s intangible assets consisted of the following:

		June 30, 2017							December 31, 2016
	Useful life			Accumulated							Accumulated
	(years)	Cost		amortization			Net		Cost		amortization			Net
Customer lists	5-20	$	110,257	$	(24,403	)	$	85,854	$	91,757	$	(20,026	)	$	71,731
Patents and    technology	5-10		22,781		(6,875	)		15,906		16,556		(5,990	)		10,566
Trade names and    trademarks	1-2		2,884		(2,756	)		128		2,885		(2,637	)		248
		$	135,922	$	(34,034	)	$	101,888	$	111,198	$	(28,653	)	$	82,545

Estimated Annual Amortization Expense for Intangible Assets

Estimated annual amortization expense for intangible assets subsequent to June 30, 2017 is as follows:

	Amount
2017 (remaining)	$	6,133
2018		12,013
2019		11,977
2020		11,694
2021		11,232
2022		10,777
Thereafter		38,062
	$	101,888