Goodwill and Intangible Assets

6 Months Ended

Jun. 30, 2021

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

7. Goodwill and Intangible Assets

Goodwill and intangible assets with indefinite lives was $154.8 million and $147.4 million as of June 30, 2021 and December 31, 2020, respectively. Intangible assets that are subject to amortization, including the related accumulated amortization, are comprised of the following:

	June 30, 2021							December 31, 2020
	Cost		Accumulated amortization			Net carrying amount		Cost		Accumulated amortization			Net carrying amount
	(In thousands)
Customer relationships	$	128,564	$	(13,153	)	$	115,411	$	102,696	$	(7,369	)	$	95,327
Technology and other intangibles		11,430		(6,852	)		4,578		6,550		(6,523	)		27
Total	$	139,994	$	(20,005	)	$	119,989	$	109,246	$	(13,892	)	$	95,354

Amortization expense associated with identifiable intangible assets was $6.1 million and $1.3 million for the six months ended June 30, 2021 and 2020, respectively. Annual estimated total amortization expense is $13.0 million, $16.3 million, $17.2 million, $14.9 million and $12.0 million, respectively, for 2021 through 2025.