Note 14 - Condensed Consolidating Financial Information of Guarantor Subsidiaries (Details) - Condensed Consolidating Statement of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	$ 22,718	$ 15,087
Investing activities:
Cash proceeds from (paid for) acquisitions, net		(95,801)
Purchases of equipment and leasehold improvements, net	(4,758)	(4,857)
Working capital and other settlements for acquisitions	(569)	547
Net cash provided by (used in) investing activities	(5,159)	(100,111)
Proceeds from foreign currency net investment hedge	500
Other	(332)
Financing activities:
Borrowings under senior secured revolving credit facility	103,597	160,640
Proceeds from the exercise of options and warrants	13,089	1,254
Excess tax benefit related to share-based compensation	5,974
Net repayments of working capital facilities	215	(5,517)
Purchases of stock for treasury		(387)
Payment of deferred financing costs	(168)	(1,034)
Repayment of subordinated unsecured notes payable	(270)	(975)
Repayment under senior secured revolving credit facility	(136,301)	(71,000)
Intercompany investments and other		(95)
Net cash used in financing activities	(13,864)	82,886
Exchange rate impact on cash and cash equivalents	(277)	128
Net increase (decrease) in cash and cash equivalents	3,418	(2,010)
Cash and cash equivalents, beginning of period	8,627	8,416
Cash and cash equivalents, end of period	12,045	6,406
Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	13,477	10,938
Investing activities:
Cash proceeds from (paid for) acquisitions, net		(96,942)
Purchases of equipment and leasehold improvements, net	(2,170)	(4,379)
Working capital and other settlements for acquisitions	(444)	(857)
Net cash provided by (used in) investing activities	(2,446)	(102,178)
Proceeds from foreign currency net investment hedge	500
Other	(332)
Financing activities:
Repayment of subordinated unsecured notes payable	(270)	(975)
Intercompany investments and other	(13,693)	89,378
Net cash used in financing activities	(13,963)	88,403
Net increase (decrease) in cash and cash equivalents	(2,932)	(2,837)
Cash and cash equivalents, beginning of period	4,125	6,044
Cash and cash equivalents, end of period	1,193	3,207
Non-Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	9,241	4,149
Investing activities:
Cash proceeds from (paid for) acquisitions, net		1,141
Purchases of equipment and leasehold improvements, net	(2,588)	(478)
Working capital and other settlements for acquisitions	(125)	1,404
Net cash provided by (used in) investing activities	(2,713)	2,067
Financing activities:
Net repayments of working capital facilities	215	(5,517)
Payment of deferred financing costs	(116)
Net cash used in financing activities	99	(5,517)
Exchange rate impact on cash and cash equivalents	(277)	128
Net increase (decrease) in cash and cash equivalents	6,350	827
Cash and cash equivalents, beginning of period	4,502	2,372
Cash and cash equivalents, end of period	10,852	3,199
Parent Company [Member]
Financing activities:
Borrowings under senior secured revolving credit facility	103,597	160,640
Proceeds from the exercise of options and warrants	13,089	1,254
Excess tax benefit related to share-based compensation	5,974
Purchases of stock for treasury		(387)
Payment of deferred financing costs	(52)	(1,034)
Repayment under senior secured revolving credit facility	(136,301)	(71,000)
Intercompany investments and other	$ 13,693	$ (89,473)