CONSOLIDATED STATEMENT OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenue	$ 799,411	$ 680,612	$ 1,541,660	$ 1,321,212
Costs and expenses:
Cost of revenue (exclusive of depreciation shown separately below)	272,822	237,304	528,671	460,604
Selling and marketing expense	247,153	211,252	490,067	430,038
General and administrative expense	103,515	89,639	199,239	178,111
Product development expense	34,052	26,911	69,169	55,032
Depreciation	17,036	12,225	31,052	24,340
Amortization of intangibles	18,137	5,805	32,215	12,846
Total costs and expenses	692,715	583,136	1,350,413	1,160,971
Operating income	106,696	97,476	191,247	160,241
Equity in losses of unconsolidated affiliates	(1,078)	(19,009)	(1,169)	(24,910)
Interest expense	(7,658)	(1,364)	(15,321)	(2,711)
Other (expense) income, net	(4)	(368)	1,654	2,388
Earnings from continuing operations before income taxes	97,956	76,735	176,411	135,008
Income tax provision	(39,416)	(28,634)	(65,162)	(55,754)
Earnings from continuing operations	58,540	48,101	111,249	79,254
Loss from discontinued operations, net of tax	(1,068)	(4,641)	(2,012)	(957)
Net earnings	57,472	43,460	109,237	78,297
Net loss (earnings) attributable to noncontrolling interests	818	(128)	2,690	(487)
Net earnings attributable to IAC shareholders	58,290	43,332	111,927	77,810
Per share information attributable to IAC shareholders:
Basic earnings per share from continuing operations (in dollars per share)	$ 0.71	$ 0.56	$ 1.36	$ 0.93
Diluted earnings per share from continuing operations (in dollars per share)	$ 0.69	$ 0.52	$ 1.31	$ 0.86
Basic earnings per share (in dollars per share)	$ 0.70	$ 0.50	$ 1.33	$ 0.92
Diluted earnings per share (in dollars per share)	$ 0.67	$ 0.47	$ 1.29	$ 0.85
Dividends declared per share (in dollars per share)	$ 0.24	$ 0.12	$ 0.48	$ 0.24
Non-cash compensation expense by function:
Total non-cash compensation expense	11,820	20,441	24,483	41,907
Cost of revenue
Non-cash compensation expense by function:
Total non-cash compensation expense	681	1,501	1,301	3,225
Selling and marketing expense
Non-cash compensation expense by function:
Total non-cash compensation expense	794	1,004	1,180	2,126
General and administrative expense
Non-cash compensation expense by function:
Total non-cash compensation expense	9,427	16,411	20,207	33,528
Product development expense
Non-cash compensation expense by function:
Total non-cash compensation expense	$ 918	$ 1,525	$ 1,795	$ 3,028