Condensed Consolidated Statements of Cash Flows - Entity [Domain] - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2015	Jun. 30, 2014
Operating activities
Net income	$ 45,395	$ 35,364
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization	15,111	18,138
Amortization of other intangible assets	6,019	8,068
Acquisition-related contingent consideration	(1,304)	(1,848)
Provision for doubtful accounts	6,571	8,671
Non-cash share-based compensation	10,581	15,194
Non-cash interest expense	1,343	1,348
Other	(223)	(368)
Changes in operating assets and liabilities, net of effects from acquisitions:
Accounts receivable, billed and unbilled	(70,710)	(115,787)
Notes receivable	(6,626)	(22,559)
Prepaid expenses and other assets	(5,120)	8,860
Accounts payable, accrued expenses and other	(2,435)	2,645
Income taxes	16,458	4,832
Accrued compensation	(40,587)	(47,418)
Billings in excess of services provided	(5,204)	7,756
Net cash used in operating activities	(30,731)	(77,104)
Investing activities
Payments for acquisition of businesses, net of cash received	(576)	(15,611)
Purchases of property and equipment	(17,533)	(21,778)
Other	64	(6)
Net cash used in investing activities	(18,045)	(37,395)
Financing activities
Payment of debt financing fees	(3,090)
Purchase and retirement of common stock		(4,367)
Net issuance of common stock under equity compensation plans	8,662	(2,692)
Deposits	2,423	11,580
Other	(326)	(891)
Net cash (used in) provided by financing activities	7,669	3,630
Effect of exchange rate changes on cash and cash equivalents	(2,585)	(552)
Net decrease in cash and cash equivalents	(43,692)	(111,421)
Cash and cash equivalents, beginning of period	283,680	205,833
Cash and cash equivalents, end of period	239,988	94,412
Supplemental cash flow disclosures
Cash paid for interest	23,047	23,541
Cash paid for income taxes, net of refunds	9,121	15,743
Non-cash investing and financing activities:
Issuance of stock units under incentive compensation plans	$ 2,124	$ 1,674

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.