The Company has three reportable segments; however, no goodwill has existed within the Military segment. Changes in the carrying amount of goodwill were as follows:

	Food
(In thousands)	Distribution		Retail				Total
Balance at December 31, 2016:	$	132,367	$	190,319		(a)	$	322,686		(a)
Acquisitions (Note 2)		46,281		—				46,281
Disposals		—		(1,292	)			(1,292	)
Impairment		—		(189,027	)			(189,027	)
Balance at December 30, 2017 and December 29, 2018:	$	178,648	$	—		(b)	$	178,648		(b)

(a)	Net of accumulated impairment charges of $86.6 million.

(b)	Net of accumulated impairment charges of $275.6 million.

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.

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. The Company completed its current year impairment analysis in the fourth quarter, which did not result in the identification of any goodwill impairment.

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

	December 29, 2018					December 30, 2017
	Gross					Gross
	Carrying			Accumulated		Carrying		Accumulated
(In thousands)	Amount			Amortization		Amount		Amortization
Non-compete agreements		$	3,358	$	886	$	3,408	$	397
Favorable leases			7,738		4,282		8,251		4,332
Pharmacy customer prescription lists			6,354		4,377		6,810		4,210
Customer relationships			57,937		7,835		57,937		4,173
Trade names			1,068		536		1,068		386
Franchise fees and other			1,064		422		1,047		381
Total		$	77,519	$	18,338	$	78,521	$	13,879

The weighted average amortization periods for amortizable intangible assets as of December 29, 2018 are as follows:

Non-compete agreements

6.3 years

Favorable leases

15.2 years

Pharmacy customer prescription lists

8.1 year

Customer relationships

16.1 years

Trade names

7.0 years

Franchise fees and other

9.6 years

Amortization expense for intangible assets was $5.8 million, $5.5 million and $3.0 million for 2018, 2017 and 2016, 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 $69.7 million and $69.8 million as of December 29, 2018 and December 30, 2017, respectively.