CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating activities:
Net loss	$ (107,368)	$ (2,302)
Less: Discontinued operations, net of tax		(23,889)
Net income (loss) from continuing operations	(107,368)	21,587
Adjustments to reconcile net income (loss) from continuing operations to net cash provided by operating activities:
Depreciation of property and equipment, including internal-use software and website development	48,866	34,314
Amortization of stock-based compensation	75,078	16,951
Amortization of intangible assets	12,570	3,422
Deferred income taxes	4,741	10,323
Foreign exchange (gain) loss on cash, cash equivalents and short-term investments, net	41,845	(12,021)
Realized gain on foreign currency forwards	(5,808)	(6,637)
Other	2,669	3,921
Changes in operating assets and liabilities, net of effects from acquisitions:
Accounts receivable	(150,834)	(71,836)
Prepaid expenses and other current assets	(28,227)	(18,389)
Accounts payable, merchant	173,020	64,299
Accounts payable, other, accrued expenses and other current liabilities	27,043	(2,248)
Deferred merchant bookings	778,409	802,457
Deferred revenue	9,085	1,673
Net cash provided by operating activities from continuing operations	881,089	847,816
Investing activities:
Capital expenditures, including internal-use software and website development	(87,156)	(50,814)
Purchases of investments	(598,127)	(293,190)
Sales and maturities of investments	245,244	240,641
Acquisitions, net of cash acquired	(540,489)
Net settlement of foreign currency forwards	5,808	6,637
Other, net		(1,031)
Net cash used in investing activities from continuing operations	(974,720)	(97,757)
Financing activities:
Purchases of treasury stock	(117,672)	(198,164)
Proceeds from issuance of treasury stock	25,273
Payment of dividends to stockholders	(17,983)	(12,204)
Proceeds from exercise of equity awards	20,410	31,801
Excess tax benefit on equity awards	19,379	7,492
Other, net	(7,758)	(4,176)
Net cash provided by (used in) financing activities from continuing operations	(78,351)	(175,251)
Net cash provided by (used in) continuing operations	(171,982)	574,808
Net cash used in discontinued operations		(7,607)
Effect of exchange rate changes on cash and cash equivalents	(38,381)	16,173
Net increase (decrease) in cash and cash equivalents	(210,363)	583,374
Cash and cash equivalents at beginning of period	1,293,161	689,134
Cash and cash equivalents at end of period	1,082,798	1,272,508
Supplemental cash flow information
Cash paid for interest from continuing operations	41,468	42,667
Income tax payments (refunds), net from continuing operations	$ 2,552	$ (17,231)