Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2014	Mar. 31, 2013
Operating activities
Net income	$ 18,117	$ 23,680
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization	8,585	8,006
Amortization of other intangible assets	4,616	5,564
Acquisition-related contingent consideration	(1,843)	731
Provision for doubtful accounts	4,442	4,094
Non-cash share-based compensation	9,503	10,055
Non-cash interest expense	675	670
Other	(443)	(135)
Changes in operating assets and liabilities, net of effects from acquisitions:
Accounts receivable, billed and unbilled	(71,474)	(47,711)
Notes receivable	(26,088)	(227)
Prepaid expenses and other assets	11,927	531
Accounts payable, accrued expenses and other	18,815	16,603
Income taxes	(684)	2,937
Accrued compensation	(93,573)	(28,862)
Billings in excess of services provided	6,630	1,760
Net cash used in operating activities	(110,795)	(2,304)
Investing activities
Payments for acquisition of businesses, net of cash received	(15,611)	(14,676)
Purchases of property and equipment	(15,179)	(7,323)
Other	(10)	12
Net cash used in investing activities	(30,800)	(21,987)
Financing activities
Borrowings under revolving line of credit, net	20,000
Purchase and retirement of common stock	(4,367)	(28,758)
Net issuance of common stock under equity compensation plans	(2,490)	(1,335)
Other	(101)	(100)
Net cash provided by (used in) financing activities	13,042	(30,193)
Effect of exchange rate changes on cash and cash equivalents	(275)	(1,598)
Net decrease in cash and cash equivalents	(128,828)	(56,082)
Cash and cash equivalents, beginning of period	205,833	156,785
Cash and cash equivalents, end of period	77,005	100,703
Supplemental cash flow disclosures
Cash paid for interest	391	321
Cash paid for income taxes, net of refunds	11,034	6,970
Non-cash investing and financing activities:
Issuance of stock units under incentive compensation plans	$ 1,632	$ 2,825

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets, combined with the amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of indefinite-lived intangible assets, other than goodwill, to fair value. As a noncash expense, this element is added back to net income when calculating cash provided by (used in) operations using the indirect method.

No definition available.