Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating activities
Net income (loss)	$ 58,807us-gaap_NetIncomeLoss	$ (10,594)us-gaap_NetIncomeLoss	$ (36,986)us-gaap_NetIncomeLoss
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	35,126us-gaap_DepreciationAndAmortization	32,638us-gaap_DepreciationAndAmortization	33,919us-gaap_DepreciationAndAmortization
Amortization and impairment of other intangible assets	15,521	22,954	22,586
Goodwill impairment charge		83,752us-gaap_GoodwillImpairmentLoss	110,387us-gaap_GoodwillImpairmentLoss
Acquisition-related contingent consideration	(1,676)	(10,869)	(3,064)
Provision for doubtful accounts	18,252us-gaap_ProvisionForDoubtfulAccounts	13,335us-gaap_ProvisionForDoubtfulAccounts	14,179us-gaap_ProvisionForDoubtfulAccounts
Non-cash share-based compensation	22,848us-gaap_ShareBasedCompensation	35,129us-gaap_ShareBasedCompensation	29,361us-gaap_ShareBasedCompensation
Non-cash interest expense and loss on extinguishment of debt	2,691us-gaap_PaidInKindInterest	2,699us-gaap_PaidInKindInterest	9,824us-gaap_PaidInKindInterest
Other	(522)us-gaap_OtherNoncashIncomeExpense	(1,582)us-gaap_OtherNoncashIncomeExpense	(488)us-gaap_OtherNoncashIncomeExpense
Changes in operating assets and liabilities, net of effects from acquisitions:
Accounts receivable, billed and unbilled	(43,072)	(56,290)	(3,691)
Notes receivable	(18,253)	(7,544)	(25,730)
Prepaid expenses and other assets	10,733	(6,784)	(1,895)
Accounts payable, accrued expenses and other	980	8,505	(12,458)
Income taxes	15,283	7,963	(6,816)
Accrued compensation	11,106	82,917	(21,074)
Billings in excess of services provided	7,577	(2,958)	12,134
Net cash provided by operating activities	135,401	193,271	120,188
Investing activities
Payments for acquisition of businesses, net of cash received	(23,467)	(55,498)	(62,893)
Purchases of property and equipment	(39,256)	(42,544)	(27,759)
Other	5,128	(5,049)	246
Net cash used in investing activities	(57,595)	(103,091)	(90,406)
Financing activities
Payments of long-term debt and capital lease obligations	(6,014)	(6,021)	(377,859)
Issuance of debt securities, net			292,608
Deposits	13,071
Purchase and retirement of common stock	(4,367)	(66,763)	(50,032)
Net issuance of common stock under equity compensation plans	4,772	29,392	1,598
Other	(1,132)	263	(4,561)
Net cash provided by (used in) financing activities	6,330	(43,129)	(138,246)
Effect of exchange rate changes on cash and cash equivalents	(6,289)	1,997	826
Net increase (decrease) in cash and cash equivalents	77,847	49,048	(107,638)
Cash and cash equivalents, beginning of period	205,833	156,785	264,423
Cash and cash equivalents, end of period	283,680	205,833	156,785
Supplemental cash flow disclosures
Cash paid for interest	48,169us-gaap_InterestPaid	48,156us-gaap_InterestPaid	57,082us-gaap_InterestPaid
Cash paid for income taxes, net of refunds	27,326us-gaap_IncomeTaxesPaidNet	35,074us-gaap_IncomeTaxesPaidNet	46,918us-gaap_IncomeTaxesPaidNet
Non-cash investing and financing activities:
Issuance of common stock to acquire businesses		2,883us-gaap_StockIssued1	5,193us-gaap_StockIssued1
Issuance of stock units under incentive compensation plans	1,674us-gaap_RestrictedStockExpense	3,005us-gaap_RestrictedStockExpense	3,079us-gaap_RestrictedStockExpense
Unsettled repurchase and retirement of common stock		$ (4,367)

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.