Consolidated and Condensed Statements of Cash Flows (Unaudited) (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities:
Net income	$ 27,362	$ 13,843
Adjustments to reconcile net income to net cash provided by operating activities:
Loss recognized on disposition of fixed assets	10	147
Unrealized loss on financial instruments	178	340
Unrealized gain on investments		(132)
Depreciation expense	8,588	7,977
Amortization of purchased intangible assets	2,561	2,826
Deferred income taxes	5,822	(1,624)
Stock-based compensation expense	9,219	9,635
Non-cash restructuring charges	4,564
Changes in operating assets and liabilities:
Accounts receivable	(2,854)	(7,912)
Unbilled revenues	(25,710)	(12,896)
Prepaid expenses and other current assets	(6,433)	(2,808)
Other assets	(608)	(612)
Accounts payable	6,043	(563)
Accrued expenses	8,726	7,298
Accrued compensation	(12,629)	(4,234)
Accrued restructuring costs	(1,900)	(1,344)
Deferred revenues	(5,344)	(4,416)
Long-term liabilities	1,828	1,675
Net cash provided by operating activities	19,423	7,200
Cash flows from investing activities:
Cash paid for acquisitions, net of cash acquired		(3,163)
Purchases of property and equipment and cost of internally developed software	(19,610)	(7,466)
Sales and maturities of marketable securities classified as trading		9,600
Sales and maturities of marketable securities not classified as trading	2,212	781
Purchases of marketable securities	(2,472)
Cash (paid) received on financial instruments, net	(192)	932
Change in restricted cash	842	46
Net cash (used in) provided by investing activities	(19,220)	730
Cash flows from financing activities:
Principal payments under capital lease obligations	(36)	(41)
Proceeds from credit facilities	4,420
Repayment of amounts borrowed under credit facilities	(6,188)
Proceeds from stock option and purchase plans	7,857	4,240
Dividends paid on common stock		(46,832)
Net cash provided by (used in) financing activities	6,053	(42,633)
Effect of exchange rate changes on cash and cash equivalents	2,654	294
Increase (decrease) in cash and cash equivalents	8,910	(34,409)
Cash and cash equivalents, at beginning of period	219,448	195,678
Cash and cash equivalents, at end of period	228,358	161,269
Non-cash investing transaction:
Common stock issued as contingent earnout consideration associated with acquisition	$ 4,872	$ 2,371