Note 5 - Segments (Details) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Financial performance of operating segments
Net transaction revenues	$ 2,356,818	$ 1,953,268	$ 4,584,282	$ 3,892,779
Marketing services and other revenues	403,456	262,111	721,601	518,657
Net revenues from external customers	2,760,274	2,215,379	5,305,883	4,411,436
Direct costs	1,880,615	1,489,299	3,575,708	2,919,948
Direct contribution	879,659	726,080	1,730,175	1,491,488
Operating costs and indirect costs associated with net revenues	360,760	241,515	646,622	518,314
Income from operations	518,899	484,565	1,083,553	973,174
Loss on divested business	(256,501)	0	(256,501)	0
Interest and other income (expense), net	28,576	14,821	32,268	20,867
Income before income taxes	290,974	499,386	859,320	994,041
Marketplaces [Member]
Financial performance of operating segments
Net transaction revenues	1,349,640	1,182,513	2,634,395	2,355,452
Marketing services and other revenues	313,799	215,821	582,306	429,677
Net revenues from external customers	1,663,439	1,398,334	3,216,701	2,785,129
Direct costs	1,018,675	834,780	1,942,466	1,638,744
Direct contribution	644,764	563,554	1,274,235	1,146,385
Payments [Member]
Financial performance of operating segments
Net transaction revenues	991,118	770,755	1,933,827	1,537,327
Marketing services and other revenues	81,878	46,290	131,516	88,980
Net revenues from external customers	1,072,996	817,045	2,065,343	1,626,307
Direct costs	837,898	654,519	1,609,200	1,281,204
Direct contribution	235,098	162,526	456,143	345,103
GSI Commerce [Member]
Financial performance of operating segments
Net transaction revenues	16,060		16,060
Marketing services and other revenues	7,779		7,779
Net revenues from external customers	23,839		23,839
Direct costs	24,042		24,042
Direct contribution	$ (203)		$ (203)