Goodwill and Other Intangibles (Tables)

6 Months Ended

Jun. 30, 2020

Goodwill and Other Intangibles

Changes in the carrying amount of goodwill by segment

Changes in the carrying amount of goodwill for the six months ended June 30, 2020 by segment, were as follows, in thousands:

	Gross Goodwill				Gross Goodwill		Accumulated		Net Goodwill
	at				at		Impairment		at
	December 31, 2019		Additions		June 30, 2020		Losses		June 30, 2020
Goodwill, by segment:
Installation	$	1,683,589	$	11,903	$	1,695,492	$	(762,021)	$	933,471
Distribution		446,350		—		446,350		—		446,350
Total goodwill	$	2,129,939	$	11,903	$	2,141,842	$	(762,021)	$	1,379,821

Schedule of other intangible assets

Other intangible assets, net includes customer relationships, non-compete agreements, and trademarks / trade names.  The following table sets forth our other intangible assets, in thousands:

	As of
	June 30,		December 31,
	2020		2019
Gross definite-lived intangible assets	$	227,761	$	221,382
Accumulated amortization		(50,890)		(40,260)
Net definite-lived intangible assets		176,871		181,122
Indefinite-lived intangible assets not subject to amortization		—		—
Other intangible assets, net	$	176,871	$	181,122

Schedule of amortization expense

The following table sets forth our amortization expense, in thousands:  

	Three Months Ended June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
Amortization expense	$	5,358	$	5,173	$	10,630	$	10,346