CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2011		Dec. 31, 2010
Revenues:
Gaming equipment and systems	$ 124,217		$ 105,639		$ 234,230		$ 197,227
Gaming operations	86,240		77,087		171,194		156,307
Total revenues	210,457		182,726		405,424		353,534
Costs and expenses:
Cost of gaming equipment and systems	54,073	[1]	43,030	[1]	101,174	[1]	79,987	[1]
Cost of gaming operations	23,858		22,692		48,090		44,914
Selling, general and administrative	61,304		55,185		118,526		106,799
Research and development costs	22,377		21,360		45,763		42,744
Depreciation and amortization	5,806		4,744		11,441		9,371
Total costs and expenses	167,418		147,011		324,994		283,815
Operating income	43,039		35,715		80,430		69,719
Other income (expense):
Interest income	1,146		1,221		2,470		2,340
Interest expense	(4,485)		(2,997)		(9,082)		(6,030)
Other, net	(728)		(323)		(2,584)		1,524
Income from continuing operations before income taxes	38,972		33,616		71,234		67,553
Income tax expense	(14,688)		(6,347)		(26,541)		(18,632)
Income from continuing operations	24,284		27,269		44,693		48,921
Loss on sale of discontinued operations, net of tax							(403)
Net income	24,284		27,269		44,693		48,518
Less net income (loss) attributable to noncontrolling interests	16		17		33		(523)
Net income attributable to Bally Technologies, Inc.	24,268		27,252		44,660		49,041
Basic earnings per share attributable to Bally Technologies, Inc.:
Income from continuing operations (in dollars per share)	$ 0.57		$ 0.51		$ 1.03		$ 0.93
Loss on sale of discontinued operations (in dollars per share)							$ (0.01)
Basic earnings per share (in dollars per share)	$ 0.57		$ 0.51		$ 1.03		$ 0.92
Diluted earnings per share attributable to Bally Technologies, Inc.:
Income from continuing operations (in dollars per share)	$ 0.54		$ 0.49		$ 0.99		$ 0.89
Loss on sale of discontinued operations (in dollars per share)							$ (0.01)
Diluted earnings per share (in dollars per share)	$ 0.54		$ 0.49		$ 0.99		$ 0.88
Weighted average shares outstanding:
Basic (in shares)	42,870		53,291		43,296		53,485
Diluted (in shares)	44,771		55,943		45,176		55,990
Amounts attributable to Bally Technologies, Inc.:
Income from continuing operations, net of tax	24,268		27,252		44,660		49,444
Loss on sale of discontinued operations, net of tax							(403)
Net income	$ 24,268		$ 27,252		$ 44,660		$ 49,041

[1] Cost of gaming equipment and systems exclude amortization related to certain intangibles, including core technology and license rights, which are included in depreciation and amortization.