As discussed in Note 2, “Acquisitions”, when the Company acquires a business the amount assigned to the tangible assets and liabilities and intangible assets acquired is based on their respective fair values determined as of the acquisition date. The excess of the purchase price over the tangible assets and liabilities and intangible assets is recorded as goodwill. The following details the changes in the Company’s intangible assets and goodwill related to the Company’s acquisitions for the years ended August 31, 2019 and August 25, 2018 as well as the respective periods over which the assets will be amortized (in thousands, except weighted average life in years). These amounts include additional payments associated with prior year acquisitions as well as changes to acquisition purchase allocations that had not been finalized as of the end of the prior fiscal year:

Year ended	August 31, 2019		Weighted Average Life in Years		August 25, 2018		Weighted Average Life in Years
Goodwill	$	3,885	N/A		$	21,500	N/A
Customer contracts		1,070		10.0		11,707		14.9
Other intangible assets		118		3.0		906		6.1
Total intangible assets and goodwill acquired	$	5,073			$	34,113

The Company does not amortize goodwill, but it is reviewed annually or more frequently if certain indicators arise, for impairment. There were no impairment losses related to goodwill or intangible assets during the years ended August 31, 2019, August 25, 2018 or August 26, 2017.

Balance as of August 26, 2017	$	376,110
Goodwill recorded during the period		21,500
Other		(188	)
Balance as of August 25, 2018	$	397,422
Goodwill recorded during the period		3,885
Other		(129	)
Balance as of August 31, 2019	$	401,178

As of August 31, 2019, the Company has allocated $385.8 million, $11.0 million and $4.4 million of goodwill to its U.S. and Canadian Rental and Cleaning, Specialty Garments and First Aid segments, respectively.

Intangible assets, net in the Company’s accompanying Consolidated Balance Sheets are as follows (in thousands):

	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
August 31, 2019
Customer contracts	$	221,306	$	164,718	$	56,588
Software		48,838		34,813		14,025
Other intangible assets		35,063		32,956		2,107
	$	305,207	$	232,487	$	72,720
August 25, 2018
Customer contracts	$	220,303	$	152,985	$	67,318
Software		41,885		30,305		11,580
Other intangible assets		35,030		31,444		3,586
	$	297,218	$	214,734	$	82,484

Estimated amortization expense for the five fiscal years subsequent to August 31, 2019 and thereafter, based on intangible assets, net as of August 31, 2019 is as follows (in thousands):

2020		15,723
2021		11,881
2022		8,231
2023		6,670
2024		5,613
Thereafter		24,602
Total estimated amortization expense	$	72,720