Intangibles (Notes)

6 Months Ended

Jun. 27, 2020

Intangible Assets, Net (Excluding Goodwill) [Abstract]

Intangible Assets Disclosure [Text Block]

Intangibles

Intangible assets consist of the following (in thousands):

	June 27, 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	8.8	$	727,586	$	(315,960)	9.2	$	717,397	$	(283,846)
Backlog	0.6	31,336		(29,541)		1.3	29,426		(28,283)
Developed technology	4.3	34,324		(23,146)		5.2	32,999		(21,378)
		$	793,246	$	(368,647)		$	779,822	$	(333,507)
Indefinite-lived assets:
Trademarks and tradenames		$	1,005,203				$	997,066

The aggregate intangible amortization expense was $17.6 million and $14.7 million for the three months period ended June 27, 2020 and June 29, 2019, respectively. The aggregate intangible amortization expense was $34.5 million and $30.8 million for the six months period ended June 27, 2020 and June 29, 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 Second Quarter	Amortization Expense
2021	$	66,606
2022	61,875
2023	56,171
2024	48,743
2025	37,113
Thereafter	154,091
	$	424,599