Note 14 - Condensed Consolidating Financial Information of Guarantor Subsidiaries (Detail) - Condensed Consolidating Statement of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Net cash provided by (used in) operating activities	$ 15,087	$ 26,806
Investing activities:
Cash paid for acquisitions, net	(95,801)	(300,233)
Purchases of equipment and leasehold improvements, net	(4,857)	(4,121)
Working capital and other settlements for acquisitions	547	(1,884)
Net cash provided by (used in) investing activities	(100,111)	(306,238)
Financing activities:
Borrowings under credit facilities	160,640	268,000
Borrowings under senior unsecured notes payable		250,000
Proceeds from the exercise of options and warrants	1,254	2,215
Excess tax benefit related to share-based compensation		3,112
Payment of deferred financing costs	(1,034)	(9,746)
Repayment of subordinated unsecured notes payable	(975)	(2,101)
Net borrowings (repayments) under working capital facilities	(5,517)	36,098
Purchases of stock for treasury	(387)	(3,548)
Repayment under senior secured revolving credit facility	(71,000)	(268,000)
Intercompany investments and other	(95)	(358)
Net cash provided by (used in) financing activities	82,886	275,672
Exchange rate impact on cash and cash equivalents	128	5
Net increase (decrease) in cash and cash equivalents	(2,010)	(3,755)
Cash and cash equivalents, beginning of period	8,416	33,624
Cash and cash equivalents, end of period	6,406	29,869
Guarantor Subsidiaries [Member]
Net cash provided by (used in) operating activities	10,938	57,414
Investing activities:
Cash paid for acquisitions, net	(96,942)	(297,930)
Purchases of equipment and leasehold improvements, net	(4,379)	(3,301)
Working capital and other settlements for acquisitions	(857)	(168)
Net cash provided by (used in) investing activities	(102,178)	(301,399)
Financing activities:
Excess tax benefit related to share-based compensation		3,112
Repayment of subordinated unsecured notes payable	(975)	(2,101)
Intercompany investments and other	89,378	238,563
Net cash provided by (used in) financing activities	88,403	239,574
Net increase (decrease) in cash and cash equivalents	(2,837)	(4,411)
Cash and cash equivalents, beginning of period	6,044	31,192
Cash and cash equivalents, end of period	3,207	26,781
Non-Guarantor Subsidiaries [Member]
Net cash provided by (used in) operating activities	4,149	(30,608)
Investing activities:
Cash paid for acquisitions, net	1,141	(2,303)
Purchases of equipment and leasehold improvements, net	(478)	(820)
Working capital and other settlements for acquisitions	1,404	(1,716)
Net cash provided by (used in) investing activities	2,067	(4,839)
Financing activities:
Net borrowings (repayments) under working capital facilities	(5,517)	36,098
Net cash provided by (used in) financing activities	(5,517)	36,098
Exchange rate impact on cash and cash equivalents	128	5
Net increase (decrease) in cash and cash equivalents	827	656
Cash and cash equivalents, beginning of period	2,372	2,432
Cash and cash equivalents, end of period	3,199	3,088
Parent Company [Member]
Financing activities:
Borrowings under credit facilities	160,640	268,000
Borrowings under senior unsecured notes payable		250,000
Proceeds from the exercise of options and warrants	1,254	2,215
Payment of deferred financing costs	(1,034)	(9,746)
Purchases of stock for treasury	(387)	(3,548)
Repayment under senior secured revolving credit facility	(71,000)	(268,000)
Intercompany investments and other	$ (89,473)	$ (238,921)