v3.6.0.2
GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION - CONDENSED STATEMENT OF OPERATIONS (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Condensed Statements of Operations                      
Revenue $ 811,162 $ 764,102 $ 745,439 $ 819,179 $ 848,728 $ 838,561 $ 771,132 $ 772,512 $ 3,139,882 $ 3,230,933 $ 3,109,547
Operating Costs and Expenses [Abstract]                      
Cost of revenue (exclusive of depreciation shown separately below) 212,468 179,131 170,397 193,734 214,084 199,377 177,963 186,737 755,730 778,161 860,204
Selling and marketing expense                 1,245,263 1,345,576 1,147,409
General and administrative expense                 547,160 525,629 443,610
Product development expense                 197,885 185,766 160,515
Depreciation                 71,676 62,205 61,156
Amortization of intangibles                 79,426 139,952 57,926
Goodwill impairment                 275,367 14,056 0
Total operating costs and expenses                 3,172,507 3,051,345 2,730,820
Operating (loss) income 112,820 85,584 (252,446) 21,417 (5,430) 87,130 62,769 35,119 (32,625) 179,588 378,727
Equity in earnings (losses) of unconsolidated affiliates                 0 0 0
Interest expense                 (109,110) (73,636) (56,314)
Other income (expense), net                 60,461 36,921 (52,484)
(Loss) earnings from continuing operations before income taxes                 (81,274) 142,873 269,929
Income tax benefit (provision)                 64,934 (29,516) (35,372)
(Loss) earnings from continuing operations 113,928 52,340 (190,542) 7,934 (31,417) 65,026 57,885 21,863 (16,340) 113,357 234,557
Less: earnings from discontinued operations, net of tax                 189 17 174,673
Net (loss) earnings 114,117 52,340 (190,542) 7,934 (31,389) 65,043 57,732 21,988 (16,151) 113,374 409,230
Net (earnings) loss attributable to noncontrolling interests                 (25,129) 6,098 5,643
Net (loss) earnings attributable to IAC shareholders $ 102,051 $ 43,162 $ (194,775) $ 8,282 $ (31,849) $ 65,611 $ 59,305 $ 26,405 (41,280) 119,472 414,873
Comprehensive income attributable to IAC shareholders                 (76,431) 55,069 340,219
Eliminations                      
Condensed Statements of Operations                      
Revenue                 (13,211) (10,009) (11,839)
Operating Costs and Expenses [Abstract]                      
Cost of revenue (exclusive of depreciation shown separately below)                 (412) (1,190) (2,753)
Selling and marketing expense                 (12,929) (8,860) (8,303)
General and administrative expense                 130 41 45
Product development expense                 0 0 (828)
Depreciation                 0 0 0
Amortization of intangibles                 0 0 0
Goodwill impairment                 0 0  
Total operating costs and expenses                 (13,211) (10,009) (11,839)
Operating (loss) income                 0 0 0
Equity in earnings (losses) of unconsolidated affiliates                 (25,963) (233,229) (261,083)
Interest expense                 0 0 0
Other income (expense), net                 0 0 0
(Loss) earnings from continuing operations before income taxes                 (25,963) (233,229) (261,083)
Income tax benefit (provision)                 0 0 0
(Loss) earnings from continuing operations                 (25,963) (233,229) (261,083)
Less: earnings from discontinued operations, net of tax                 (9) 12 (570)
Net (loss) earnings                 (25,972) (233,217) (261,653)
Net (earnings) loss attributable to noncontrolling interests                 0 0 0
Net (loss) earnings attributable to IAC shareholders                 (25,972) (233,217) (261,653)
Comprehensive income attributable to IAC shareholders                 1,523 (163,912) (181,947)
IAC                      
Condensed Statements of Operations                      
Revenue                 0 0 0
Operating Costs and Expenses [Abstract]                      
Cost of revenue (exclusive of depreciation shown separately below)                 859 720 998
Selling and marketing expense                 2,353 3,210 2,138
General and administrative expense                 89,583 93,090 105,221
Product development expense                 4,807 4,311 6,496
Depreciation                 1,610 1,918 1,426
Amortization of intangibles                 0 0 0
Goodwill impairment                 0 0  
Total operating costs and expenses                 99,212 103,249 116,279
Operating (loss) income                 (99,212) (103,249) (116,279)
Equity in earnings (losses) of unconsolidated affiliates                 49,536 215,092 257,714
Interest expense                 (26,876) (49,405) (51,988)
Other income (expense), net                 (2,059) (3,201) (1,444)
(Loss) earnings from continuing operations before income taxes                 (78,611) 59,237 88,003
Income tax benefit (provision)                 37,142 60,218 152,197
(Loss) earnings from continuing operations                 (41,469) 119,455 240,200
Less: earnings from discontinued operations, net of tax                 189 17 174,673
Net (loss) earnings                 (41,280) 119,472 414,873
Net (earnings) loss attributable to noncontrolling interests                 0 0 0
Net (loss) earnings attributable to IAC shareholders                 (41,280) 119,472 414,873
Comprehensive income attributable to IAC shareholders                 (76,431) 55,069 340,219
Guarantor Subsidiaries                      
Condensed Statements of Operations                      
Revenue                 1,381,525 1,635,345 1,637,345
Operating Costs and Expenses [Abstract]                      
Cost of revenue (exclusive of depreciation shown separately below)                 302,293 334,931 414,255
Selling and marketing expense                 689,933 819,354 696,173
General and administrative expense                 163,315 157,013 127,122
Product development expense                 82,071 85,582 76,482
Depreciation                 31,366 27,276 25,670
Amortization of intangibles                 41,157 102,622 31,863
Goodwill impairment                 253,245 14,056  
Total operating costs and expenses                 1,563,380 1,540,834 1,371,565
Operating (loss) income                 (181,855) 94,511 265,780
Equity in earnings (losses) of unconsolidated affiliates                 (23,573) 18,137 3,369
Interest expense                 0 (6,130) (4,187)
Other income (expense), net                 10,040 27,903 6,381
(Loss) earnings from continuing operations before income taxes                 (195,388) 134,421 271,343
Income tax benefit (provision)                 60,504 (47,280) (104,606)
(Loss) earnings from continuing operations                 (134,884) 87,141 166,737
Less: earnings from discontinued operations, net of tax                 0 0 0
Net (loss) earnings                 (134,884) 87,141 166,737
Net (earnings) loss attributable to noncontrolling interests                 0 0 0
Net (loss) earnings attributable to IAC shareholders                 (134,884) 87,141 166,737
Comprehensive income attributable to IAC shareholders                 (115,899) 83,664 158,538
Non-Guarantor Subsidiaries                      
Condensed Statements of Operations                      
Revenue                 1,771,568 1,605,597 1,484,041
Operating Costs and Expenses [Abstract]                      
Cost of revenue (exclusive of depreciation shown separately below)                 452,990 443,700 447,704
Selling and marketing expense                 565,906 531,872 457,401
General and administrative expense                 294,132 275,485 211,222
Product development expense                 111,007 95,873 78,365
Depreciation                 38,700 33,011 34,060
Amortization of intangibles                 38,269 37,330 26,063
Goodwill impairment                 22,122 0  
Total operating costs and expenses                 1,523,126 1,417,271 1,254,815
Operating (loss) income                 248,442 188,326 229,226
Equity in earnings (losses) of unconsolidated affiliates                 0 0 0
Interest expense                 (82,234) (18,101) (139)
Other income (expense), net                 52,480 12,219 (57,421)
(Loss) earnings from continuing operations before income taxes                 218,688 182,444 171,666
Income tax benefit (provision)                 (32,712) (42,454) (82,963)
(Loss) earnings from continuing operations                 185,976 139,990 88,703
Less: earnings from discontinued operations, net of tax                 9 (12) 570
Net (loss) earnings                 185,985 139,978 89,273
Net (earnings) loss attributable to noncontrolling interests                 (25,129) 6,098 5,643
Net (loss) earnings attributable to IAC shareholders                 160,856 146,076 94,916
Comprehensive income attributable to IAC shareholders                 $ 114,376 $ 80,248 $ 23,409