Goodwill amounts by reporting unit are summarized as follows:



	Goodwill at		Acquisitions ⁽¹⁾		Dispositions		Other⁽²⁾			Goodwill at
	December 30, 2017		Acquisitions ⁽¹⁾		Dispositions		Other⁽²⁾			September 29, 2018
United States	$	586,437	$	58,667	$	—	$	—		$	645,104
Canada	30,372		—		—		(940		)	29,432
Mexico	3,694		—		—		186			3,880
Total	$	620,503	$	58,667	$	—	$	(754	)	$	678,416


(1)	These amounts relate to the acquisition of MinuteKey in the third quarter of 2018 and adjustments to the opening balance sheet for the acquisition of ST Fastening Systems ("STFS"). STFS was acquired in the fourth quarter of 2017.


(2)	These amounts relate to adjustments resulting from fluctuations in foreign currency exchange rates.

Other intangibles, net, as of September 29, 2018 and December 30, 2017 consist of the following:



	Estimated Useful Life (Years)	September 29, 2018		December 30, 2017
Customer relationships	13-20	$	751,634	$	703,399
Trademarks - All Others	Indefinite	85,586		85,759
Technology	8	19,000		—
Trade Names	15	5,400		—
Trademarks - TagWorks	5	300		300
KeyWorks license	7	4,447		4,455
Patents	7-15	32,424		31,941
Intangible assets, gross		898,791		825,854
Less: Accumulated amortization		162,528		132,659
Other intangibles, net		$	736,263	$	693,195

The amortization expense for amortizable assets including the adjustments resulting from fluctuations in foreign currency exchange rates was $10,437 and $29,872 for the thirteen and thirty-nine weeks ended September 29, 2018 and $9,500 and $28,442 for the thirteen and thirty-nine weeks ended September 30, 2017.

The Company tests goodwill and indefinite-lived intangible assets for impairment annually. Impairment is also tested when events or changes in circumstances indicate that the carrying values of the assets may be greater than their fair values. During the thirteen and thirty-nine weeks ended September 29, 2018 and the thirteen and thirty-nine weeks ended September 30, 2017, the Company did not adjust goodwill or intangible assets to their fair values as a result of any impairment analyses.

In 2017, the fair value of each reporting unit, except the United States, was in excess of its carrying value by more than 10%. In 2017, the fair value of United States reporting unit exceeded its carrying value by approximately 4%. A 100 basis point decrease in the projected long-term growth rate or a 100 basis point increase in the discount rate for this reporting unit could decrease the fair value by enough to result in some impairment based on the current forecast model. Future declines in the market and deterioration in earnings could lead to a potential impairment.