v2.4.0.8
GUARANTOR AND NONGUARANTOR FINANCIAL INFORMATION (Details 2) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Condensed Income Statements, Captions [Line Items]                      
Revenue $ 724,455 $ 756,872 $ 799,411 $ 742,249 $ 765,251 $ 714,470 $ 680,612 $ 640,600 $ 3,022,987 $ 2,800,933 $ 2,059,444
Cost of revenue 222,574 248,856 272,822 255,849 267,918 262,275 237,304 223,300 1,000,101 990,797 753,889
Selling and marketing expense                 964,131 894,545 617,198
General and administrative expense                 372,470 386,088 321,062
Product development expense                 141,330 117,683 90,757
Depreciation                 58,909 52,481 56,719
Amortization of intangibles                 59,843 35,771 22,057
Total costs and expenses                 2,596,784 2,477,365 1,861,682
Operating income 112,952 122,004 106,696 84,551 85,294 78,033 97,476 62,765 426,203 323,568 197,762
Equity in losses of unconsolidated affiliates                 (6,615) (25,345) (36,300)
Interest expense                 (33,596) (6,149) (5,430)
Other income (expense), net                 30,309 (3,012) 15,490
Earnings from continuing operations before income taxes                 416,301 289,062 171,522
Income tax (provision) benefit                 (134,502) (119,215) 4,047
Earnings from continuing operations 78,829 91,721 58,540 52,709 44,408 46,185 48,101 31,153 281,799 169,847 175,569
Earnings (loss) from discontinued operations, net of tax                 1,926 (9,051) (3,992)
Net earnings 78,853 95,635 57,472 51,765 41,938 40,561 43,460 34,837 283,725 160,796 171,577
Net loss (earnings) attributable to noncontrolling interests                 2,059 (1,530) 2,656
Net earnings attributable to IAC shareholders 76,917 96,940 58,290 53,637 40,739 40,717 43,332 34,478 285,784 159,266 174,233
Comprehensive income attributable to IAC shareholders                 304,907 139,540 144,244
IAC
                      
Condensed Income Statements, Captions [Line Items]                      
Revenue                 0 0 413
Cost of revenue                 2,456 5,194 4,763
Selling and marketing expense                 2,563 4,081 4,385
General and administrative expense                 97,025 121,919 120,908
Product development expense                 4,685 5,611 7,299
Depreciation                 1,386 832 799
Amortization of intangibles                 0 0 0
Total costs and expenses                 108,115 137,637 138,154
Operating income                 (108,115) (137,637) (137,741)
Equity in losses of unconsolidated affiliates                 439,925 309,639 696,250
Interest expense                 (29,417) (1,835) (1,111)
Other income (expense), net                 (35,331) (82,900) (732,588)
Earnings from continuing operations before income taxes                 267,062 87,267 (175,190)
Income tax (provision) benefit                 16,796 81,050 353,415
Earnings from continuing operations                 283,858 168,317 178,225
Earnings (loss) from discontinued operations, net of tax                 1,926 (9,051) (3,992)
Net earnings                 285,784 159,266 174,233
Net loss (earnings) attributable to noncontrolling interests                 0 0 0
Net earnings attributable to IAC shareholders                 285,784 159,266 174,233
Comprehensive income attributable to IAC shareholders                 304,907 139,540 144,244
Guarantor Subsidiaries
                      
Condensed Income Statements, Captions [Line Items]                      
Revenue                 2,183,969 1,986,527 1,552,508
Cost of revenue                 597,350 594,631 493,480
Selling and marketing expense                 768,270 669,448 500,118
General and administrative expense                 167,795 155,123 136,511
Product development expense                 100,734 83,008 70,219
Depreciation                 38,938 35,544 44,940
Amortization of intangibles                 40,277 10,958 3,593
Total costs and expenses                 1,713,364 1,548,712 1,248,861
Operating income                 470,605 437,815 303,647
Equity in losses of unconsolidated affiliates                 62,402 37,866 29,607
Interest expense                 (3,979) (4,174) (4,259)
Other income (expense), net                 (35,040) (3,733) 2,689
Earnings from continuing operations before income taxes                 493,988 467,774 331,684
Income tax (provision) benefit                 (156,170) (146,333) (126,196)
Earnings from continuing operations                 337,818 321,441 205,488
Earnings (loss) from discontinued operations, net of tax                 0 0 0
Net earnings                 337,818 321,441 205,488
Net loss (earnings) attributable to noncontrolling interests                 411 206 60
Net earnings attributable to IAC shareholders                 338,229 321,647 205,548
Comprehensive income attributable to IAC shareholders                 339,094 322,418 205,895
Non-Guarantor Subsidiaries
                      
Condensed Income Statements, Captions [Line Items]                      
Revenue                 843,133 820,759 509,270
Cost of revenue                 403,155 395,877 256,800
Selling and marketing expense                 194,431 222,481 114,310
General and administrative expense                 107,772 109,029 63,621
Product development expense                 35,911 29,064 13,239
Depreciation                 18,585 16,105 10,980
Amortization of intangibles                 19,566 24,813 18,464
Total costs and expenses                 779,420 797,369 477,414
Operating income                 63,713 23,390 31,856
Equity in losses of unconsolidated affiliates                 (303) (22,548) (32,866)
Interest expense                 (200) (140) (60)
Other income (expense), net                 100,680 83,621 745,389
Earnings from continuing operations before income taxes                 163,890 84,323 744,319
Income tax (provision) benefit                 4,872 (53,932) (223,172)
Earnings from continuing operations                 168,762 30,391 521,147
Earnings (loss) from discontinued operations, net of tax                 (39) 842 4,877
Net earnings                 168,723 31,233 526,024
Net loss (earnings) attributable to noncontrolling interests                 1,648 (1,736) 2,596
Net earnings attributable to IAC shareholders                 170,371 29,497 528,620
Comprehensive income attributable to IAC shareholders                 181,070 29,622 484,333
Total Eliminations
                      
Condensed Income Statements, Captions [Line Items]                      
Revenue                 (4,115) (6,353) (2,747)
Cost of revenue                 (2,860) (4,905) (1,154)
Selling and marketing expense                 (1,133) (1,465) (1,615)
General and administrative expense                 (122) 17 22
Product development expense                 0 0 0
Depreciation                 0 0 0
Amortization of intangibles                 0 0 0
Total costs and expenses                 (4,115) (6,353) (2,747)
Operating income                 0 0 0
Equity in losses of unconsolidated affiliates                 (508,639) (350,302) (729,291)
Interest expense                 0 0 0
Other income (expense), net                 0 0 0
Earnings from continuing operations before income taxes                 (508,639) (350,302) (729,291)
Income tax (provision) benefit                 0 0 0
Earnings from continuing operations                 (508,639) (350,302) (729,291)
Earnings (loss) from discontinued operations, net of tax                 39 (842) (4,877)
Net earnings                 (508,600) (351,144) (734,168)
Net loss (earnings) attributable to noncontrolling interests                 0 0 0
Net earnings attributable to IAC shareholders                 (508,600) (351,144) (734,168)
Comprehensive income attributable to IAC shareholders                 (520,164) (352,040) (690,228)
IAC Consolidated
                      
Condensed Income Statements, Captions [Line Items]                      
Revenue                 3,022,987 2,800,933 2,059,444
Cost of revenue                 1,000,101 990,797 753,889
Selling and marketing expense                 964,131 894,545 617,198
General and administrative expense                 372,470 386,088 321,062
Product development expense                 141,330 117,683 90,757
Depreciation                 58,909 52,481 56,719
Amortization of intangibles                 59,843 35,771 22,057
Total costs and expenses                 2,596,784 2,477,365 1,861,682
Operating income                 426,203 323,568 197,762
Equity in losses of unconsolidated affiliates                 (6,615) (25,345) (36,300)
Interest expense                 (33,596) (6,149) (5,430)
Other income (expense), net                 30,309 (3,012) 15,490
Earnings from continuing operations before income taxes                 416,301 289,062 171,522
Income tax (provision) benefit                 (134,502) (119,215) 4,047
Earnings from continuing operations                 281,799 169,847 175,569
Earnings (loss) from discontinued operations, net of tax                 1,926 (9,051) (3,992)
Net earnings                 283,725 160,796 171,577
Net loss (earnings) attributable to noncontrolling interests                 2,059 (1,530) 2,656
Net earnings attributable to IAC shareholders                 285,784 159,266 174,233
Comprehensive income attributable to IAC shareholders                 $ 304,907 $ 139,540 $ 144,244