Note 14 - Condensed Consolidating Financial Information of Guarantor Subsidiaries (Detail) - Condensed Consolidating Statement of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net cash provided by operating activities	$ 24,777	$ 39,543	$ 18,303
Investing activities:
Cash paid for acquisitions, net	(108,970)	(322,248)	(115,225)
Purchases of equipment and leasehold improvements, net	(5,841)	(6,856)	(1,730)
Working capital and other settlements for acquisitions	427	(6,710)	418
Net cash provided by (used in) investing activities	(114,384)	(335,814)	(116,537)
Financing activities:
Borrowings under credit facilities			67,315
Excess tax benefit related to share-based compensation	2,853		974
Borrowings under senior secured revolving credit facility	170,640	278,000
Proceeds from the exercise of options and warrants	2,258	2,292	703
Borrowings under senior unsecured notes payable		250,000
Purchases of stock for treasury	(387)	(9,421)
Issuance of preferred stock, net			32,421
Issuance of common stock, net			136,660
Repayment of related party notes			(3,500)
Payment of deferred financing costs	(1,074)	(9,746)	(6,534)
Repayment of subordinated unsecured notes payable	(2,193)	(2,421)	(2,167)
Net borrowings (repayments) under working capital facilities	(6,279)	35,621	4,997
Repayment under senior secured revolving credit facility	(76,000)	(273,000)	(100,550)
Repayment under credit facilities			(100,550)
Intercompany investments and other	(94)	(440)
Net cash provided by (used in) financing activities	89,724	270,885	130,319
Exchange rate impact on cash and cash equivalents	94	178	40
Net increase (decrease) in cash and cash equivalents	211	(25,208)	32,125
Cash and cash equivalents, beginning of year	8,416	33,624	1,499
Cash and cash equivalents, end of year	8,627	8,416	33,624
Guarantor Subsidiaries [Member]
Net cash provided by operating activities	18,131	33,994	14,565
Investing activities:
Cash paid for acquisitions, net	(110,111)	(320,496)	(115,331)
Purchases of equipment and leasehold improvements, net	(5,071)	(6,048)	(1,728)
Working capital and other settlements for acquisitions	(857)	(5,007)	418
Net cash provided by (used in) investing activities	(116,039)	(331,551)	(116,641)
Financing activities:
Repayment of related party notes			(3,500)
Repayment of subordinated unsecured notes payable	(2,193)	(2,421)	(2,167)
Net borrowings (repayments) under working capital facilities		37,145	6,447
Intercompany investments and other	98,182	237,685	130,989
Net cash provided by (used in) financing activities	95,989	272,409	131,769
Net increase (decrease) in cash and cash equivalents	(1,919)	(25,148)	29,693
Cash and cash equivalents, beginning of year	6,044	31,192	1,499
Cash and cash equivalents, end of year	4,125	6,044	31,192
Non-Guarantor Subsidiaries [Member]
Net cash provided by operating activities	6,646	5,549	3,738
Investing activities:
Cash paid for acquisitions, net	1,141	(1,752)	106
Purchases of equipment and leasehold improvements, net	(770)	(808)	(2)
Working capital and other settlements for acquisitions	1,284	(1,703)
Net cash provided by (used in) investing activities	1,655	(4,263)	104
Financing activities:
Net borrowings (repayments) under working capital facilities	(6,279)	(1,524)	(1,450)
Intercompany investments and other	14
Net cash provided by (used in) financing activities	(6,265)	(1,524)	(1,450)
Exchange rate impact on cash and cash equivalents	94	178	40
Net increase (decrease) in cash and cash equivalents	2,130	(60)	2,432
Cash and cash equivalents, beginning of year	2,372	2,432
Cash and cash equivalents, end of year	4,502	2,372	2,432
Parent Company [Member]
Financing activities:
Borrowings under credit facilities			67,315
Excess tax benefit related to share-based compensation	2,853		974
Borrowings under senior secured revolving credit facility	170,640	278,000
Proceeds from the exercise of options and warrants	2,258	2,292	703
Borrowings under senior unsecured notes payable		250,000
Purchases of stock for treasury	(387)	(9,421)
Issuance of preferred stock, net			32,421
Issuance of common stock, net			136,660
Payment of deferred financing costs	(1,074)	(9,746)	(6,534)
Repayment under senior secured revolving credit facility	(76,000)	(273,000)
Repayment under credit facilities			(100,550)
Intercompany investments and other	$ (98,290)	$ (238,125)	$ (130,989)