Intangible Assets, Goodwill and Other Assets (Tables)

12 Months Ended

Dec. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

Estimated useful lives are as follows:

Intangible Assets	Useful Life (in years)
Customer relationships	7	to	15
Restrictive covenants	1	to	3
Trade names	1.5	to	7
Intellectual property	4	to	6

Intangible assets consisted of the following (amounts in thousands):

	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Weighted Average Amortization Period in Years
December 31, 2019
Customer relationships	$	135,290	$	(21,637)	$	113,653	12.1
Trade names	1,536		(147)		1,389		3.0
Intellectual property	27,700		(10,893)		16,807		3.7
Total	$	164,526	$	(32,677)	$	131,849

	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Weighted Average Amortization Period in Years
December 31, 2018
Customer relationships	$	156,790	$	(104,740)	$	52,050	12.8
Trade names	16,246		(16,215)		31		0.7
Intellectual property	21,700		(6,670)		15,030		4.1
Restrictive covenants	263		(234)		29		0.7
Total	$	194,999	$	(127,859)	$	67,140

Amortization Expense of Intangible Assets

Amortization expense of intangible assets is expected to approximate the following (in thousands):

Year ending December 31,	Amortization
2020	$	14,914
2021	14,447
2022	14,439
2023	11,605
2024	10,180
Thereafter	66,264
Total	$	131,849

Goodwill

As a result of the Accent and VitreosHealth acquisitions, the changes in the carrying amount of goodwill were as follows (in thousands):

Balance at December 31, 2018	$	487,617
Vitreos acquisition	30,189
Accent acquisition	81,545
Balance at December 31, 2019	$	599,351