DISCONTINUED OPERATIONS (Details) (USD $)	3 Months Ended					12 Months Ended
	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2009	Sep. 30, 2009	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2009
Summary of gain on disposal of discontinued operations
Gain on sale of discontinued operations	$ (403,000)	$ 22,079,000				$ (403,000)	$ 22,079,000
Costs and expenses:
Depreciation and amortization							2,900,000	3,300,000
Other income (expense):
Income from discontinued operations, net of tax		1,639,000	2,363,000	1,430,000	1,749,000		7,181,000	8,057,000
Income from discontinued operations attributable to Bally Technologies, Inc.							6,175,000	6,870,000
Rainbow Casino discontinued operations
Summary of gain on disposal of discontinued operations
Sale proceeds							80,000,000
Distributions to noncontrolling interest							(688,000)
Assets held for sale		(45,733,000)					(45,733,000)
Liabilities related to assets held for sale		1,161,000					1,161,000
Adjustments to proceeds for fees and expenses							(471,000)
Gain on sale of discontinued operations before income taxes							34,269,000
Income tax expense							(12,190,000)
Gain on sale of discontinued operations							22,079,000
Post-closing adjustments to reduce gain on sale of discontinued operations						400,000
Revenues:
Casino operations							34,336,000	39,669,000
Costs and expenses:
Direct cost of casino operations							14,081,000	16,750,000
Selling, general and administrative							6,821,000	7,864,000
Depreciation and amortization							2,873,000	3,337,000
Costs and expenses, total							23,775,000	27,951,000
Operating income							10,561,000	11,718,000
Other income (expense):
Interest income							7,000	26,000
Other, net							(25,000)	13,000
Income from discontinued operations before income taxes							10,543,000	11,757,000
Income tax expense							(3,362,000)	(3,700,000)
Income from discontinued operations, net of tax							7,181,000	8,057,000
Less income attributable to noncontrolling interests							1,006,000	1,187,000
Income from discontinued operations attributable to Bally Technologies, Inc.							$ 6,175,000	$ 6,870,000