CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified	Total	Total IAC Shareholders' Equity	Common Stock	Common Stock Class B Convertible Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss	Treasury Stock	Noncontrolling Interests	Redeemable Noncontrolling Interests
Redeemable noncontrolling interests, balance at Dec. 31, 2011	$ 50,349									$ 50,349
Balance at Dec. 31, 2011	1,960,140	1,905,049	234	16	11,280,173	(477,785)	(12,443)	(8,885,146)	55,091
Balance (in shares) at Dec. 31, 2011			234,101	16,157
Increase (Decrease) in Shareholders' Equity
Net (loss) earnings for the six months ended June 30, 2012	79,124	77,810				77,810			1,314
Redeemable noncontrolling interests, net (loss) earnings for the six months ended June 30, 2012										(827)
Other comprehensive loss, net of tax	(4,665)	(3,117)					(3,117)		(1,548)
Redeemable noncontrolling interests, other comprehensive loss, net of tax										(1,441)
Non-cash compensation expense	41,907	40,444			40,444				1,463
Issuance of common stock upon exercise of stock options, vesting of restricted stock units and other, net of withholding taxes	17,506	17,506	2		17,504
Issuance of common stock upon exercise of stock options, vesting of restricted stock units and other, net of withholding taxes (in shares)			1,987
Income tax benefit related to the exercise of stock options, vesting of restricted stock units and other	9,764	9,764			9,764
Issuance of common stock upon the exercise of warrants	284,111	284,111	12		284,099
Issuance of common stock upon the exercise of warrants (in shares)			11,728
Dividends	(22,798)	(22,798)			(22,798)
Purchase of treasury stock	(362,153)	(362,153)						(362,153)
Redeemable noncontrolling interests, purchase of redeemable noncontrolling interests										(2,955)
Fair value of redeemable noncontrolling interests adjustment	(3,700)	(3,700)			(3,700)
Redeemable noncontrolling interests, fair value of redeemable noncontrolling interests adjustment										3,700
Transfer from noncontrolling interests to redeemable noncontrolling interests	(6,796)								(6,796)
Redeemable noncontrolling interests, transfer from noncontrolling interests to redeemable noncontrolling interests										6,796
Redeemable noncontrolling interests, other										715
Redeemable noncontrolling interests, balance at Jun. 30, 2012	56,337									56,337
Balance at Jun. 30, 2012	$ 1,992,440	$ 1,942,916	$ 248	$ 16	$ 11,605,486	$ (399,975)	$ (15,560)	$ (9,247,299)	$ 49,524
Balance (in shares) at Jun. 30, 2012			247,816	16,157