DISCONTINUED OPERATIONS (Details) (USD $)	3 Months Ended	12 Months Ended
	Sep. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Summary of gain on disposal of discontinued operations
Gain on sale of discontinued operations	$ (403,000)	$ (403,000)	$ 22,079,000
Costs and expenses:
Depreciation and amortization			2,900,000
Other income (expense):
Income from discontinued operations, net of tax			7,181,000
Income from discontinued operations attributable to Bally Technologies, Inc.			6,175,000
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)
Liabilities related to assets held for sale			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, net of income taxes		400,000
Revenues:
Casino operations			34,336,000
Costs and expenses:
Direct cost of casino operations			14,081,000
Selling, general and administrative			6,821,000
Depreciation and amortization			2,873,000
Costs and expenses, total			23,775,000
Operating income			10,561,000
Other income (expense):
Interest income			7,000
Other, net			(25,000)
Income from discontinued operations before income taxes			10,543,000
Income tax expense			(3,362,000)
Income from discontinued operations, net of tax			7,181,000
Less income attributable to noncontrolling interests			1,006,000
Income from discontinued operations attributable to Bally Technologies, Inc.			$ 6,175,000