Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities:
Net income	$ 20,509	$ 12,530
Adjustments to reconcile net income to net cash provided by (used in) operating activities-
Depreciation	12,520	11,713
Amortization	21,215	8,285
Amortization of original issue discount	2,869	3,985
Gain on short-term investments and other	(34)	(79)
Loss on repurchase of convertible debt securities		10,952
Deferred income taxes	(1,344)	(44)
Excess tax benefit of stock-based compensation awards	(824)	(1,098)
Stock-based employee compensation	6,529	6,184
Changes in operating assets and liabilities:
Trade accounts and other receivables, net	(17,769)	7,360
Other current and non-current assets	(2,175)	(3,911)
Income taxes payable/receivable	8,398	(6,423)
Trade accounts payable and accrued liabilities	(28,987)	3,637
Deferred revenue	(22,083)	2,644
Net cash provided by (used in) operating activities	(1,176)	55,735
Cash flows from investing activities:
Purchases of property and equipment	(11,061)	(7,519)
Purchases of short-term investments	(19,968)	(46,922)
Proceeds from sale/maturity of short-term investments	17,700	34,900
Acquisition of businesses, net of cash acquired		(2,764)
Acquisition of and investments in client contracts	(4,479)	(2,623)
Net cash used in investing activities	(17,808)	(24,928)
Cash flows from financing activities:
Proceeds from issuance of common stock	753	772
Repurchase of common stock	(4,049)	(33,643)
Payments on acquired equipment financing	(834)	(571)
Proceeds from long-term debt		150,000
Payments of deferred financing costs	(205)	(4,268)
Payments on long-term debt	(64,149)	(124,992)
Excess tax benefit of stock-based compensation awards	824	1,098
Net cash used in financing activities	(67,660)	(11,604)
Effect of exchange rate fluctuations on cash	3,141
Net increase (decrease) in cash and cash equivalents	(83,503)	19,203
Cash and cash equivalents, beginning of period	197,858	163,489
Cash and cash equivalents, end of period	114,355	182,692
Supplemental disclosures of cash flow information:
Interest	7,233	1,499
Income taxes	$ 6,213	$ 7,365

The cash outflow associated with the investments in client contracts.

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Period Type:	duration

- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

+ Details

Name:	us-gaap_ShareBasedCompensation
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_SupplementalCashFlowInformationAbstract
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration