EARNINGS PER SHARE (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Amounts attributable to Bally Technologies, Inc.:
Income from continuing operations, net of tax									$ 141,444	$ 101,148	$ 98,666
Loss on sale of discontinued operations, net of tax											(403)
Diluted earnings attributable to Bally Technologies, Inc.									$ 141,444	$ 101,148	$ 98,263
Weighted average common shares outstanding									40,120	42,985	51,960
Dilutive effect of:
Stock options, Restricted Stock Units ("RSU") and restricted stock (in shares)									872	1,435	2,459
Warrants (in shares)											1
Weighted average diluted shares outstanding (in shares)									40,992	44,420	54,420
Basic earnings per share attributable to Bally Technologies, Inc.:
Income from continuing operations (in dollars per share)									$ 3.53	$ 2.35	$ 1.90
Loss on sale of discontinued operations (in dollars per share)											$ (0.01)
Basic earnings per share (in dollars per share)	$ 0.96	$ 0.95	$ 0.82	$ 0.80	$ 0.63	$ 0.70	$ 0.57	$ 0.47	$ 3.53	$ 2.35	$ 1.89
Diluted earnings per share attributable to Bally Technologies, Inc.:
Income from continuing operations (in dollars per share)									$ 3.45	$ 2.28	$ 1.82
Loss on sale of discontinued operations (in dollars per share)											$ (0.01)
Diluted earnings per share (in dollars per share)	$ 0.95	$ 0.93	$ 0.80	$ 0.77	$ 0.61	$ 0.67	$ 0.54	$ 0.45	$ 3.45	$ 2.28	$ 1.81
Stock options, RSU and restricted stock having anti-dilutive effect in calculation of diluted earnings per share (in shares)									70	574	688