CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Net income	$ 89,160	$ 23,015
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation and amortization	62,881	57,183
Non-cash impairment charges	0	44,610
Non-cash compensation expense associated with employee benefit and stock compensation plans	19,311	19,422
Deferred income tax benefit	(5,712)	(15,507)
Gain on sale of investments	(16,400)	0
Loss on sale of business	0	169
Loss on disposal of property and equipment	375	432
Equity investee earnings	0	(17)
Changes in operating assets and liabilities, net of business sold:
Accounts receivable	(57,095)	(2,143)
Unbilled services	(17,467)	(20,704)
Inventory	1,323	8,948
Accounts payable	18,312	6,401
Accrued liabilities	(45,470)	(26,023)
Unearned revenue	(14,095)	36,442
Income taxes	6,736	(5,028)
Other assets and liabilities, net	(44,441)	(45,124)
Net cash (used in) provided by operating activities	(2,582)	82,076
Cash flows from investing activities:
Capital expenditures	(68,433)	(69,343)
Proceeds from sale of investments	17,781	0
Other, net	394	990
Net cash used in investing activities	(50,258)	(68,353)
Cash flows from financing activities:
Net borrowings under revolving credit facility	5,000	300,000
Stock issued under option plans	40,226	3,522
Purchase of treasury stock	(27,118)	(302,099)
Net cash provided by financing activities	18,108	1,423
Effect of exchange rate changes on cash	(12,492)	(6,421)
Net change in cash and cash equivalents	(47,224)	8,725
Cash and cash equivalents, beginning of period	492,824	389,103
Cash and cash equivalents, end of period	$ 445,600	$ 397,828