Consolidated and Condensed Statements of Cash Flows (Unaudited) (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Net income	$ 46,464	$ 28,118
Adjustments to reconcile net income to net cash provided by operating activities:
Loss recognized on disposition of fixed assets	42	240
Unrealized loss on financial instruments	150	167
Unrealized gain on investments		(132)
Depreciation expense	13,943	11,910
Amortization of purchased intangible assets	4,286	4,127
Deferred income taxes	9,161	2,761
Stock-based compensation expense	14,237	13,924
Non-cash restructuring charges	4,564
Changes in operating assets and liabilities, net of impact of acquisitions:
Accounts receivable	(4,439)	(9,454)
Unbilled revenues	(24,280)	(18,835)
Prepaid expenses and other current assets	(5,954)	(6,612)
Other assets	(670)	(1,381)
Accounts payable	8,318	1,104
Accrued expenses	(2,462)	3,435
Accrued compensation	(3,621)	1,334
Accrued restructuring costs	(1,539)	(2,457)
Deferred revenues	(844)	(4,166)
Other long-term liabilities	5,583	2,775
Net cash provided by operating activities	62,939	26,858
Cash flows from investing activities:
Cash paid for acquisitions, net of cash acquired	(44,602)	(3,163)
Purchases of property and equipment and cost of internally developed software	(28,711)	(15,019)
Sales and maturities of marketable securities classified as trading		16,425
Sales and maturities of marketable securities not classified as trading	4,470	881
Purchases of marketable securities	(4,783)
Cash (paid) received on financial instruments, net	(193)	535
Change in restricted cash	654	(27)
Net cash used in investing activities	(73,165)	(368)
Cash flows from financing activities:
Principal payments under capital lease obligations	(54)	(62)
Proceeds from credit facilities	10,387	3,050
Repayment of amounts borrowed under credit facilities	(14,807)
Proceeds from stock option and purchase plans	8,388	5,943
Repayment of acquired debt	(3,766)
Dividends paid on common stock	(48,873)	(46,832)
Net cash used in financing activities	(48,725)	(37,901)
Effect of exchange rate changes on cash and cash equivalents	(5,203)	5,661
Decrease in cash and cash equivalents	(64,154)	(5,750)
Cash and cash equivalents, at beginning of period	219,448	195,678
Cash and cash equivalents, at end of period	155,294	189,928
Non-cash investing transaction:
Common stock issued as contingent earnout consideration associated with acquisition	$ 4,872	$ 2,371