Consolidated Statements of Cash Flows (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Operating Activities:
Net income (loss)	$ 26,894	$ (2,568)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	24,739	18,304
Deferred tax benefit	(23,707)	(3,942)
Stock-based compensation expense	5,968	5,829
Provision for doubtful accounts and sales credits	3,331	2,807
Amortization of deferred interest		68
Deferred compensation	100
Stock-based compensation windfall tax benefit	(1,890)	(894)
Realized gain on securities	(409)	(582)
Amortization of debt issuance costs	91
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable	(11,583)	(8,316)
Customer funds and customer funds receivable	(6,060)
Prepaid expenses and other current assets	(4,777)	(3,783)
Accounts payable and accrued expenses	(8,237)	(8,232)
Customer funds payable	6,060
Deferred revenue	1,427	(9)
Other liabilities - long-term	147	290
Deferred rent	67	(24)
Other assets - long-term	144	(12,307)
Net cash provided by (used in) operating activities	12,305	(13,359)
Investing Activities:
Capital expenditures	(5,571)	(9,852)
Sale of investments	2,485	1,419
Capitalized software and website development costs	(9,657)	(6,435)
Payment for acquisition of businesses, net of acquired cash	(128,311)	(3,028)
Net cash used in investing activities	(141,054)	(17,896)
Financing Activities:
Principal payments on capital lease obligations	(299)	(260)
Proceeds from the exercise of employee stock options	4,386	396
Proceeds from employee stock purchase plan	340	413
Purchase of treasury stock	(441)	(595)
Stock-based compensation windfall tax benefit	1,890	894
Net cash provided by financing activities	5,876	848
Net decrease in cash and cash equivalents	(122,873)	(30,407)
Effect of exchange rate changes on cash and cash equivalents	371	(141)
Cash and cash equivalents, beginning of period	192,563	197,509
Cash and cash equivalents, end of period	70,061	166,961
Supplemental Disclosure:
Income taxes	4,465	3,954
Interest	32	33
Non-cash investing and financing activities:
Accrued capitalized hardware, software and fixed assets	1,004	2,977
Assets acquired under capital leases	34	289
Capitalized stock-based compensation	67	34
Deferred compensation reversal to equity	$ 100