Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Operating activities:
Net loss	$ (7,630)	$ (631)
Adjustments to reconcile net loss to net cash provided by operating activities:
Gain on interest rate swap	(115)	(197)
Depreciation and amortization	27,787	20,084
Amortization of deferred rent	(114)	(106)
Share-based compensation	9,545	3,022
Excess tax benefit related to share-based compensation		(1,886)
Provision for doubtful accounts	1,434	610
Amortization of deferred financing costs	1,048	918
Deferred income taxes	(12,481)	(2,563)
Other	(896)	223
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable	(13,802)	(2,623)
Prepaid expenses and other current assets	769	(689)
Accounts payable and accrued expenses	9,410	747
Accrued interest expense	168	1,191
Deferred revenue and customer deposits	1,314	(764)
Other liabilities	(215)	(943)
Net cash provided by operating activities	16,222	16,393
Investing activities:
Cash paid for acquisitions, net		(280,542)
Purchases of equipment and leasehold improvements, net	(2,955)	(2,634)
Working capital and other settlements for acquisitions	1,506	(1,636)
Net cash used in investing activities	(1,449)	(284,812)
Financing activities:
Borrowings under senior secured revolving credit facility	11,000	264,000
Proceeds from the exercise of options and warrants	328	1,313
Excess tax benefit related to share-based compensation		1,886
Purchases of stock for treasury	(387)
Payment of deferred financing costs	(624)	(1,838)
Repayments of subordinated unsecured notes payable	(759)	(1,027)
Net borrowings (repayments) under working capital facilities	(4,341)	37,794
Repayments under senior secured revolving credit facility	(16,000)	(60,000)
Other	(95)	(275)
Net cash provided by (used in) financing activities	(10,878)	241,853
Exchange rate impact on cash and cash equivalents	51	148
Net increase (decrease) in cash and cash equivalents	3,946	(26,418)
Cash and cash equivalents, beginning of period	8,416	33,624
Cash and cash equivalents, end of period	12,362	7,206
Supplemental disclosure of noncash investing and financing activities:
Issuance of common stock for acquisitions		45,386
Supplemental disclosures of cash flow information:
Cash paid for interest	12,083	3,702
Cash paid for income taxes	$ 3,307	$ 1,773