Significant Accounting Policies (Details)			12 Months Ended
	Dec. 29, 2018 USD ($) store state	Dec. 30, 2017 USD ($)	Dec. 29, 2018 USD ($) store state	Dec. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)
Nature of business
Number of states in which rural lifestyle retail stores are operated by the company | state	49		49
Reclassification of stranded tax effects (ASU 2018-02)			$ 0	$ 595,000	$ 0
Excess Tax Benefit from Share-based Compensation, Operating Activities				11,700,000
Self insurance reserves [Abstract]
Self-insured employee medical stop loss limit			300,000
Workers compensation and general liability deductible			500,000
Self-insurance reserves	$ 65,000,000	$ 57,900,000	65,000,000	57,900,000
Impairment of long-lived assets
Impairment charges			0	0
Goodwill and other intangible assets
Goodwill and Intangible Asset Impairment			0	0
Revenue recognition and sales returns
Reserve for sales returns	11,300,000	3,800,000
Revenue Recognition Gift Card			2,600,000	2,400,000	1,900,000
Advertising costs
Advertising expenses			83,400,000	81,300,000	84,200,000
Prepaid advertising costs	1,300,000	1,100,000	1,300,000	1,100,000
Warehousing and distribution costs
Distribution center costs			209,700,000	182,100,000	166,800,000
Preopening costs
Preopening costs			$ 8,500,000	10,800,000	$ 9,900,000
Cash and cash equivalents
Minimum processing time for payments due from banks for customer credit card transactions			24
Maximum processing time for payments due from banks for customer credit card transactions			48
Fair value disclosures
Senior Credit Facility amount outstanding	408,750,000	427,500,000	$ 408,750,000	427,500,000
Derivative, Fair Value, Net	5,823,000	$ 5,152,000	5,823,000	$ 5,152,000
Property and equipment
Cost of option to purchase the real property	1		$ 1
Franklin, KY DC
Property and equipment
Industrial Revenue Bond, Maturity Date			30 years
Maximum Principal Amount of Bond Authorized	54,000,000		$ 54,000,000
Net Bond Proceeds Issued	51,800,000		$ 51,800,000
Macon, GA DC
Property and equipment
Industrial Revenue Bond, Maturity Date			15 years
Maximum Principal Amount of Bond Authorized	58,000,000		$ 58,000,000
Net Bond Proceeds Issued	49,900,000		$ 49,900,000
Brentwood, TN SSC
Property and equipment
Industrial Revenue Bond, Maturity Date			10 years
Maximum Principal Amount of Bond Authorized	78,000,000		$ 78,000,000
Net Bond Proceeds Issued	$ 75,300,000		$ 75,300,000
Building | Minimum
Property and Equipment
Property, plant and equipment, useful life			30 years
Building | Maximum
Property and Equipment
Property, plant and equipment, useful life			35 years
Leaseholds and Building Improvements | Minimum
Property and Equipment
Property, plant and equipment, useful life			1 year
Leaseholds and Building Improvements | Maximum
Property and Equipment
Property, plant and equipment, useful life			35 years
Furniture, fixtures and equipment | Minimum
Property and Equipment
Property, plant and equipment, useful life			5 years
Furniture, fixtures and equipment | Maximum
Property and Equipment
Property, plant and equipment, useful life			10 years
Computer software and hardware | Minimum
Property and Equipment
Property, plant and equipment, useful life			2 years
Computer software and hardware | Maximum
Property and Equipment
Property, plant and equipment, useful life			7 years
TEXAS
Self insurance reserves [Abstract]
Workers compensation and general liability deductible			$ 500,000
TSCO and Petsense [Domain]
Nature of business
Number of rural lifestyle retail stores operated by the company | store	1,940		1,940
TSCO stores [Domain]
Nature of business
Number of rural lifestyle retail stores operated by the company | store	1,765		1,765
Petsense stores [Domain]
Nature of business
Number of rural lifestyle retail stores operated by the company | store	175		175