BENEFIT PLANS	12 Months Ended
Dec. 31, 2012
Compensation and Retirement Disclosure [Abstract]
BENEFIT PLANS	BENEFIT PLANS IAC has a retirement savings plan in the United States that qualifies under Section 401(k) of the Internal Revenue Code. Participating employees may contribute up to 50% of their pre-tax earnings, but not more than statutory limits. IAC contributes fifty cents for each dollar a participant contributes in this plan, with a maximum contribution of 3% of a participant's eligible earnings. Matching contributions for the plan for the years ended December 31, 2012, 2011 and 2010 are $6.5 million, $5.0 million and $4.9 million, respectively. The increase in matching contributions in 2012 is primarily related to increased participation in the plan. Matching contributions are invested in the same manner as each participant's voluntary contributions in the investment options provided under the plan. Investment options in the plan include IAC common stock, but neither participant nor matching contributions are required to be invested in IAC common stock. IAC also has or participates in various benefit plans, principally defined contribution plans, for its international employees. IAC's contributions for these plans for the years ended December 31, 2012, 2011 and 2010 are $2.3 million, $1.4 million and $0.4 million, respectively. The increase in contributions for both 2012 and 2011 relates primarily to Meetic, consolidated beginning September 1, 2011.

BENEFIT PLANS

IAC has a retirement savings plan in the United States that qualifies under Section 401(k) of the Internal Revenue Code. Participating employees may contribute up to 50% of their pre-tax earnings, but not more than statutory limits. IAC contributes fifty cents for each dollar a participant contributes in this plan, with a maximum contribution of 3% of a participant's eligible earnings. Matching contributions for the plan for the years ended December 31, 2012, 2011 and 2010 are $6.5 million, $5.0 million and $4.9 million, respectively. The increase in matching contributions in 2012 is primarily related to increased participation in the plan. Matching contributions are invested in the same manner as each participant's voluntary contributions in the investment options provided under the plan. Investment options in the plan include IAC common stock, but neither participant nor matching contributions are required to be invested in IAC common stock.

IAC also has or participates in various benefit plans, principally defined contribution plans, for its international employees. IAC's contributions for these plans for the years ended December 31, 2012, 2011 and 2010 are $2.3 million, $1.4 million and $0.4 million, respectively. The increase in contributions for both 2012 and 2011 relates primarily to Meetic, consolidated beginning September 1, 2011.