Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Operating activities:
Net income (loss)	$ 3,243	$ (6,375)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Gain on interest rate swap		(94)
Depreciation and amortization	29,200	32,148
Amortization of deferred rent	(122)	(172)
Share-based compensation	9,980	8,414
Excess tax benefit related to share-based compensation	(7,314)	(1,752)
Provision for doubtful accounts	3,266	2,113
Amortization of deferred financing costs	1,152	1,081
Deferred income taxes	(4,683)	(11,029)
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable	(25,236)	(19,544)
Prepaid expenses and other current assets	(2,937)	402
Accounts payable and accrued expenses	12,017	12,314
Accrued interest expense	240	(520)
Deferred revenue and customer deposits	134	1,165
Other liabilities	(185)	(537)
Net cash provided by operating activities	18,755	17,614
Investing activities:
Cash paid for acquisitions, net	(185,128)
Proceeds from (cash paid for) foreign currency net investment hedges	(5,044)	3,810
Working capital and other settlements for acquisitions	(2,299)
Purchases of building, equipment and leasehold improvements, net	(3,610)	(3,313)
Other	(839)
Net cash provided by (used in) investing activities	(196,920)	497
Financing activities:
Borrowings under senior secured revolving credit facility	219,995	77,000
Proceeds from the exercise of options and warrants	23,090	6,032
Excess tax benefit related to share-based compensation	7,314	1,752
Net borrowings (repayments) under working capital facilities	1,160	(3,216)
Payment of deferred financing costs	(241)	(52)
Repayment of subordinated unsecured notes payable	(333)
Repayments under senior secured revolving credit facility	(78,000)	(98,300)
Other	(53)
Net cash provided by (used in) financing activities	172,932	(16,784)
Exchange rate impact on cash and cash equivalents	295	(787)
Net increase (decrease) in cash and cash equivalents	(4,938)	540
Cash and cash equivalents, beginning of period	12,829	8,627
Cash and cash equivalents, end of period	7,891	9,167
Supplemental disclosures of cash flow information:
Cash paid for interest	13,744	14,272
Cash paid for (refund from) income taxes	$ (336)	$ 5,010