All goodwill relates to the Food Distribution segment. Changes in the carrying amount of goodwill were as follows:

(In thousands)	Total
Balance at December 30, 2017 and December 29, 2018:	$	178,648
Acquisitions (Note 15)		2,387
Balance at December 28, 2019:	$	181,035

The Company reviews goodwill and other intangible assets for impairment annually, during the fourth quarter of each year, and more frequently if circumstances indicate the possibility of impairment. Testing goodwill and other intangible assets for impairment requires management to make significant estimates about the Company’s future performance, cash flows, and other assumptions that can be affected by potential changes in economic, industry or market conditions, business operations, competition, or the Company’s stock price and market capitalization.

During the Company’s 2019 annual impairment review, projected cash flows were discounted based on a weighted average cost of capital (“WACC”) of 9.9%. This WACC was developed from current interest rates, equity risk premiums, and other market-based expectations regarding expected investment returns. The development of the WACC requires estimates of an equity rate of return and a debt rate of return, which are specific to the industry in which the Food Distribution reporting unit operates. In 2019, the Company also performed an interim impairment review during the second quarter due to a decline in the Company’s market capitalization. The Company concluded that the fair value of the Food Distribution reporting unit was substantially in excess of its carrying value in both the second and fourth quarter reviews.

In 2017, the Company experienced significantly lower than expected Retail operating results and it was determined that the carrying value of the Retail segment exceeded its fair value. Consequently, the Company recorded a goodwill impairment charge of $189.0 million in the third quarter of 2017 to fully impair Retail segment goodwill.

The following table reflects the components of amortized intangible assets, included in “Intangible assets, net” on the consolidated balance sheets:

	December 28, 2019					December 29, 2018
	Gross					Gross
	Carrying			Accumulated		Carrying		Accumulated
(In thousands)	Amount			Amortization		Amount		Amortization
Non-compete agreements		$	4,438	$	1,493	$	3,358	$	886
Favorable leases (a)			—		—		7,738		4,282
Pharmacy customer prescription lists			8,200		4,481		6,354		4,377
Customer relationships			57,937		11,497		57,937		7,835
Trade names			1,068		687		1,068		536
Franchise fees and other			1,114		422		1,064		422
Total		$	72,757	$	18,580	$	77,519	$	18,338

(a) Upon the adoption of ASU 2016-02 at the beginning of 2019, favorable leases were reclassified as a component of Operating lease assets within the consolidated balance sheets.

The weighted average amortization periods for amortizable intangible assets as of December 28, 2019 are as follows:

Non-compete agreements

6.1 years

Pharmacy customer prescription lists

7.7 years

Customer relationships

16.0 years

Trade names

7.1 years

Franchise fees and other

10.1 years

Amortization expense for intangible assets was $5.8 million, $5.8 million and $5.5 million for 2019, 2018 and 2017, respectively.

Estimated amortization expense for each of the five succeeding fiscal years is as follows:

Indefinite-lived intangible assets that are not amortized, consisting primarily of trade names and licenses for the sale of alcoholic beverages, totaled $76.3 million and $69.7 million as of December 28, 2019 and December 29, 2018, respectively.