Consolidated Statements of Cash Flows (unaudited) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Operating activities:
Net loss	$ (8,626,000)	$ (12,256,000)
Adjustments to reconcile net loss to net cash provided by operating activities:
Gain on interest rate swap	(101,000)	(169,000)
Depreciation and amortization	48,058,000	42,245,000
Amortization of deferred rent	(280,000)	(99,000)
Share-based compensation	12,234,000	12,562,000
Excess tax benefit related to share-based compensation	(5,974,000)
Provision for doubtful accounts	3,506,000	2,555,000
Amortization of deferred financing costs	1,636,000	1,612,000
Deferred income taxes	(12,963,000)	(15,346,000)
Other		(31,000)
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable	(22,327,000)	(20,850,000)
Prepaid expenses and other current assets	(361,000)	103,000
Accounts payable and accrued expenses	12,588,000	8,339,000
Accrued interest expense	(6,082,000)	(5,114,000)
Deferred revenue and customer deposits	1,824,000	1,938,000
Other liabilities	(414,000)	(402,000)
Net cash provided by operating activities	22,718,000	15,087,000
Investing activities:
Cash paid for acquisitions, net		(95,801,000)
Purchases of equipment and leasehold improvements, net	(4,758,000)	(4,857,000)
Working capital and other settlements for acquisitions	(569,000)	547,000
Proceeds from foreign currency net investment hedge	500,000
Other	(332,000)
Net cash used in investing activities	(5,159,000)	(100,111,000)
Financing activities:
Borrowings under senior secured revolving credit facility	103,597,000	160,640,000
Proceeds from the exercise of options and warrants	13,089,000	1,254,000
Excess tax benefit related to share-based compensation	5,974,000
Net borrowings (repayments) under working capital facilities	215,000	(5,517,000)
Purchases of stock for treasury		(387,000)
Payment of deferred financing costs	(168,000)	(1,034,000)
Repayment of subordinated unsecured notes payable	(270,000)	(975,000)
Repayments under senior secured revolving credit facility	(136,301,000)	(71,000,000)
Other		(95,000)
Net cash provided by (used in) financing activities	(13,864,000)	82,886,000
Exchange rate impact on cash and cash equivalents	(277,000)	128,000
Net increase (decrease) in cash and cash equivalents	3,418,000	(2,010,000)
Cash and cash equivalents, beginning of period	8,627,000	8,416,000
Cash and cash equivalents, end of period	12,045,000	6,406,000
Supplemental disclosures of cash flow information:
Cash paid for interest	26,570,000	23,860,000
Cash paid for income taxes	$ 7,604,000	$ 5,513,000