Nature of Operations and Summary of Significant Accounting Policies - Narrative (Details)	12 Months Ended
	Jun. 30, 2017 USD ($) Store State	Jun. 30, 2016 USD ($) Store Building	Jun. 30, 2015 USD ($) Store
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Number of discount retail stores operated | Store	731	751	769
Number of states in which the entity operates | State	40
Credit card receivables from third party consumer credit card providers	$ 4,900,000	$ 4,800,000
Capitalized inventory costs expensed in cost of sales	108,200,000	83,700,000	$ 73,400,000
Capitalized cost in inventory	33,900,000	32,600,000
Disposal of assets	$ (79,000)	(700,000)	(1,109,000)
Revenue recognition gift cards estimated performance period	36 months
Gift card breakage amount	$ 900,000	600,000	200,000
Advertising expenses	29,000,000	28,900,000	$ 25,600,000
Prepaid advertising	149,000	153,000
Short-term cease use liabilities	991,000	1,116,000
Long-term cease use liabilities	500,000	900,000
Sale-leaseback transaction, gain recognized in other income	741,000	2,515,000
Asset retirement obligations	2,500,000
Short-term asset retirement obligations	200,000
Asset retirement obligations liability	$ 2,307,000	2,561,000
Equipment and Software
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Term of capital lease	5 years
Capital lease maturity date	Jan. 31, 2022
Current capital lease liability	$ 100,000
Long-term capital lease liability	600,000
Capital lease asset	800,000
Equipment and Software | Maximum
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Capital lease amortization expense	100,000
Intellectual Property
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Carrying value of intellectual property	1,000,000
Impairment of intellectual property	0
Worker's compensation
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Stop loss limits per claim	500,000
Self insurance reserve	8,600,000	8,200,000
Insurance expenses recognized	4,800,000	3,400,000
General liability
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Stop loss limits per claim	250,000
Self insurance reserve	2,500,000	3,300,000
Insurance expenses recognized	3,400,000	4,000,000
Medical liabilities
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Stop loss limits per claim	150,000
Self insurance reserve	1,100,000	1,000,000
Insurance expenses recognized	$ 7,700,000	$ 7,300,000
Dallas
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Transaction to sell, number of buildings | Building		2
Dallas | Buildings and Land
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Transaction to sell, number of buildings | Building		2
Sale-leaseback transaction, net book value		$ 5,200,000
Sale-leaseback transaction, asset description	Transaction to sell two buildings and land
Sale-leaseback transaction, extended period	2018-03
Consideration received reduced by closing and transaction costs		8,800,000
Gain on sale-leaseback transaction		3,600,000
Sale-leaseback transaction, gain recognized in other income	$ 700,000	$ 2,500,000
Sale-leaseback transaction, deferred gain to be recognized	$ 400,000
Sale-leaseback transaction, lease terms	The leaseback is an operating lease, and we will pay approximately $0.6 million in rent, excluding executory costs, from July 2017 through March 2018.
Sale-leaseback transaction, future rent payment	$ 600,000