Intangibles (Notes)

9 Months Ended

Sep. 26, 2020

Intangible Assets, Net (Excluding Goodwill) [Abstract]

Intangible Assets Disclosure [Text Block]

Intangibles

Intangible assets consist of the following (in thousands):

	September 26, 2020					December 28, 2019
	Estimated Weighted Avg Remaining Life	Gross Carrying Amount		Accumulated Amortization		Estimated Weighted Avg Remaining Life	Gross Carrying Amount		Accumulated Amortization
Amortized intangible assets:
Customer lists	8.7	$	726,631	$	(331,670)	9.2	$	717,397	$	(283,846)
Backlog	0.5	31,336		(30,389)		1.3	29,426		(28,283)
Developed technology	7.3	36,351		(23,678)		5.2	32,999		(21,378)
		$	794,318	$	(385,737)		$	779,822	$	(333,507)
Indefinite-lived assets:
Trademarks and tradenames		$	1,012,019				$	997,066

The aggregate intangible amortization expense was $16.9 million and $17.3 million for the three months period ended September 26, 2020 and September 28, 2019, respectively. The aggregate intangible amortization expense was $51.4 million and $48.1 million for the nine months period ended September 26, 2020 and September 28, 2019, respectively. The estimated future amortization expense of intangible assets is as follows (in thousands):

Twelve Month Period coinciding with the end of the company's Fiscal Third Quarter	Amortization Expense
2021	$	64,119
2022	60,564
2023	54,096
2024	45,053
2025	35,892
Thereafter	148,857
	$	408,581