EARNINGS PER SHARE (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012	Mar. 31, 2011
Amounts attributable to Bally Technologies, Inc.:
Income from continuing operations, net of tax	$ 29,967	$ 23,766	$ 74,627	$ 73,210
Loss on sale of discontinued operations, net of tax				(403)
Net income attributable to Bally Technologies, Inc.	$ 29,967	$ 23,766	$ 74,627	$ 72,807
Weighted average common shares outstanding	43,087	52,923	43,229	53,311
Dilutive effect of:
Stock options, Restricted Stock Units ("RSU") and restricted stock (in shares)	1,965	2,602	1,909	2,536
Warrants (in shares)		2		2
Weighted average diluted shares outstanding (in shares)	45,052	55,527	45,138	55,849
Basic earnings per share attributable to Bally Technologies, Inc.:
Income from continuing operations (in dollars per share)	$ 0.70	$ 0.45	$ 1.73	$ 1.38
Loss on sale of discontinued operations (in dollars per share)				$ (0.01)
Basic earnings per share (in dollars per share)	$ 0.70	$ 0.45	$ 1.73	$ 1.37
Diluted earnings per share attributable to Bally Technologies, Inc.:
Income from continuing operations (in dollars per share)	$ 0.67	$ 0.43	$ 1.65	$ 1.31
Loss on sale of discontinued operations (in dollars per share)				$ (0.01)
Diluted earnings per share (in dollars per share)	$ 0.67	$ 0.43	$ 1.65	$ 1.30
Stock options, RSU and restricted stock having anti-dilutive effect in calculation of diluted earnings per share (in shares)	524	624	713	644