CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified	Total	IAC	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, 2012	$ 58,126									$ 58,126
Balance at Dec. 31, 2012	1,707,635	1,655,728	251	16	11,607,367	(318,519)	(32,169)	(9,601,218)	51,907
Balance (in shares) at Dec. 31, 2012			250,982	16,157
Increase (Decrease) in Shareholders' Equity
Net (loss) earnings for the three months ended March 31, 2013	53,050	53,637				53,637			(587)
Redeemable noncontrolling interests, net (loss) earnings for the nine months ended September 30, 2012										(1,285)
Other comprehensive loss, net of tax	(12,815)	(11,927)					(11,927)		(888)
Non-cash compensation expense	12,663	12,820			12,820				(157)
Redeemable noncontrolling interests, other comprehensive loss, net of tax										(584)
Issuance of common stock upon exercise of stock options, vesting of restricted stock units and other, net of withholding taxes	(4,230)	(4,230)	0		(4,231)			(1)
Issuance of common stock upon exercise of stock options, vesting of restricted stock units and other, net of withholding taxes (in shares)			0
Income tax benefit related to the exercise of stock options, vesting of restricted stock units and other	12,332	12,332			12,332
Dividends	(21,597)	(21,597)			(21,597)
Purchase of treasury stock	(60,138)	(60,138)						(60,138)
Fair value of redeemable noncontrolling interests adjustment	(2,659)	(2,659)			(2,659)					2,659
Transfer from noncontrolling interests to redeemable noncontrolling interests	(304)								(304)	304
Redeemable noncontrolling interests, other										34
Stockholders' Equity, Other	2,553	2,553			2,553				0
Redeemable noncontrolling interests, balance at Mar. 31, 2013	59,254									59,254
Balance at Mar. 31, 2013	$ 1,686,490	$ 1,636,519	$ 251	$ 16	$ 11,606,585	$ (264,882)	$ (44,096)	$ (9,661,355)	$ 49,971
Balance (in shares) at Mar. 31, 2013			250,982	16,157