CONSOLIDATED STATEMENT OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Revenue	$ 742,249	$ 640,600
Costs and expenses:
Cost of revenue (exclusive of depreciation shown separately below)	255,082	223,571
Selling and marketing expense	242,914	219,838
General and administrative expense	98,026	91,788
Product development expense	33,582	23,482
Depreciation	14,016	12,115
Amortization of intangibles	14,078	7,041
Total costs and expenses	657,698	577,835
Operating income	84,551	62,765
Equity in losses of unconsolidated affiliates	(91)	(5,901)
Interest expense	(7,663)	(1,347)
Other income, net	1,658	2,756
Earnings from continuing operations before income taxes	78,455	58,273
Income tax provision	(25,746)	(27,120)
Earnings from continuing operations	52,709	31,153
(Loss) earnings from discontinued operations, net of tax	(944)	3,684
Net earnings	51,765	34,837
Net loss (earnings) attributable to noncontrolling interests	1,872	(359)
Net earnings attributable to IAC shareholders	53,637	34,478
Per share information attributable to IAC shareholders:
Basic earnings per share from continuing operations (in dollars per share)	$ 0.65	$ 0.37
Diluted earnings per share from continuing operations (in dollars per share)	$ 0.62	$ 0.34
Basic earnings per share (in dollars per share)	$ 0.64	$ 0.42
Diluted earnings per share (in dollars per share)	$ 0.61	$ 0.38
Dividends declared per share (in dollars per share)	$ 0.24	$ 0.12
Non-cash compensation expense by function:
Total non-cash compensation expense	12,663	21,466
Cost of revenue
Non-cash compensation expense by function:
Total non-cash compensation expense	620	1,724
Selling and marketing expense
Non-cash compensation expense by function:
Total non-cash compensation expense	386	1,122
General and administrative expense
Non-cash compensation expense by function:
Total non-cash compensation expense	10,780	17,117
Product development expense
Non-cash compensation expense by function:
Total non-cash compensation expense	$ 877	$ 1,503