Nature of Operations and Summary of Significant Accounting Policies - Narrative (Details)							3 Months Ended								12 Months Ended
	Jul. 15, 2020 Store	Jun. 09, 2020 Store	Jun. 08, 2020 Store	May 29, 2020	Dec. 22, 2017	Dec. 21, 2017	Jun. 30, 2020 USD ($) Store State	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($) Store	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2020 USD ($) Store State	Jun. 30, 2019 USD ($) Store	Jun. 30, 2018 USD ($) Store	Jul. 10, 2020 USD ($)	May 28, 2020 USD ($)	Jul. 01, 2019 USD ($)	Jun. 30, 2017 USD ($)
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Number of discount retail stores operated | Store							685				714				685	714	726
Number of states in which the entity operates | State							39								39
Number of stores not re-opened | Store							2								2
Petition date															May 27, 2020
Maximum ownership transfer allowable				4.50%
Operating losses							$ 130,996,000	$ 30,647,000	$ (11,099,000)	$ 8,651,000	$ 11,434,000	$ 7,811,000	$ (16,308,000)	$ 7,588,000	$ 159,194,000	$ 10,525,000	$ 20,950,000
Restructuring, impairment and abandonment charges															113,492,000	0	0
Professional fees															3,600,000
Accrued professional fees							3,500,000								3,500,000
Cumulative effect adjustment to retained earnings							6,935,000				171,309,000				6,935,000	171,309,000	180,254,000				$ 198,839,000
Operating lease assets							258,433,000								258,433,000
Credit card receivables from third party consumer credit card providers							3,700,000				9,700,000				3,700,000	9,700,000
Capitalized inventory costs expensed in cost of sales															97,800,000	106,600,000	$ 109,100,000
Capitalized cost in inventory							22,300,000				32,900,000				$ 22,300,000	$ 32,900,000
Corporate federal income tax rate					21.00%	35.00%									21.00%	21.00%	27.20%
Impairment charges															$ 80,076,000
Advertising expenses															18,600,000	$ 26,500,000	$ 27,200,000
Prepaid advertising							146,000				177,000				146,000	177,000
Short-term cease use liabilities											2,000					2,000
Asset retirement obligations							2,800,000				3,100,000				2,800,000	3,100,000
Short-term asset retirement obligations							1,598,000				55,000				1,598,000	55,000
Long-term asset retirement obligations liability							1,213,000				3,002,000				$ 1,213,000	3,002,000
Existence of option to renew															true
Intellectual Property
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Carrying value of intellectual property							$ 1,600,000								$ 1,600,000
Impairment of intellectual property															0
Accounting Standards Update 2014-09
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Impairment charges															0
Accounting Standards Update 2014-09 | Breakage
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Breakage income recognized															$ 800,000	400,000	600,000
ASU 2016-02
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
ASU adoption status							true								true
ASU adoption date							Jul. 01, 2019								Jul. 01, 2019
ASU adoption extensible list															us-gaap:AccountingStandardsUpdate201602Member
Worker's compensation
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Stop loss limits per claim							$ 500,000								$ 500,000
Self insurance reserve							8,400,000				8,200,000				8,400,000	8,200,000
Insurance expenses recognized															2,700,000	2,100,000	5,300,000
General liability
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Stop loss limits per claim							250,000								250,000
Self insurance reserve							1,300,000				1,100,000				1,300,000	1,100,000
Insurance expenses recognized															3,300,000	2,300,000	2,900,000
Medical liabilities
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Stop loss limits per claim							150,000								150,000
Self insurance reserve							900,000				900,000				900,000	900,000
Insurance expenses recognized															8,700,000	7,900,000	6,400,000
Cumulative Effect Period of Adoption Adjustment
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Cumulative effect adjustment to retained earnings											(601,000)					(601,000)
Retained Earnings
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Cumulative effect adjustment to retained earnings							$ (230,729,000)				(63,800,000)				$ (230,729,000)	(63,800,000)	$ (51,360,000)				$ (29,422,000)
Retained Earnings | Cumulative Effect Period of Adoption Adjustment
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Cumulative effect adjustment to retained earnings											$ (601,000)					$ (601,000)
Retained Earnings | Cumulative Effect Period of Adoption Adjustment | ASU 2016-02
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Cumulative effect adjustment to retained earnings																				$ 600,000
Minimum | Warehouse Facility and Retail Store Location
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Operating lease term of contract							1 year								1 year
Maximum
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
cash paid for reorganization items															$ 100,000
Maximum | Warehouse Facility and Retail Store Location
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Operating lease term of contract							11 years								11 years
Maximum | Equipment
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Finance lease term of contract							60 months								60 months
DIP ABL Facility
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Revolving credit facility, aggregate principal amount																			$ 100,000,000
Maximum number of store locations approving procedures for closing | Store		230
Number of store locations in process to close | Store			132
Impairment and abandonment charges															$ 105,200,000
DIP ABL Facility | Subsequent Event
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Number of stores expect to close | Store	65
DIP Term Facility | Secured Debt
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Operating lease assets																				350,000,000
Operating lease liabilities																				375,000,000
DIP Term Facility | Secured Debt | Retained Earnings | Cumulative Effect Period of Adoption Adjustment
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Cumulative effect adjustment to retained earnings																				$ 600,000
DIP Term Facility | Subsequent Event | Secured Debt
Nature Of Operations And Summary Of Significant Accounting Policies [Line Items]
Revolving credit facility, aggregate principal amount																		$ 25,000,000