Note 14 - Condensed Consolidating Financial Information of Guarantor Subsidiaries (Details) - Condensed Consolidating Statement of Cash Flows (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	$ 36,355,000	$ 24,777,000	$ 39,543,000
Investing activities:
Proceeds from foreign currency net investment hedge	1,421,000
Investing activities:
Cash paid for acquisitions, net	(3,318,000)	(108,970,000)	(322,248,000)
Purchases of equipment and leasehold improvements, net	(6,544,000)	(5,841,000)	(6,856,000)
Working capital and other settlements for acquisitions	(569,000)	427,000	(6,710,000)
Net cash provided by (used in) investing activities	(10,154,000)	(114,384,000)	(335,814,000)
Financing activities:
Borrowings under senior secured revolving credit facility	142,473,000	170,640,000	278,000,000
Borrowings under senior unsecured notes payable			250,000,000
Proceeds from the exercise of options and warrants	24,261,000	2,258,000	2,292,000
Excess tax benefit related to share-based compensation	6,610,000	2,853,000
Net borrowings (repayments) under working capital facilities	2,772,000	(6,279,000)	35,621,000
Purchases of stock for treasury		(387,000)	(9,421,000)
Payment of deferred financing costs	(172,000)	(1,074,000)	(9,746,000)
Repayment of subordinated unsecured notes payable	(270,000)	(2,193,000)	(2,421,000)
Repayment under senior secured revolving credit facility	(196,746,000)	(76,000,000)	(273,000,000)
Other	(1,144,000)	(94,000)	(440,000)
Net cash provided by (used in) financing activities	(21,072,000)	89,724,000	270,885,000
Exchange rate impact on cash and cash equivalents	(927,000)	94,000	178,000
Net increase (decrease) in cash and cash equivalents	4,202,000	211,000	(25,208,000)
Cash and cash equivalents, beginning of year	8,627,000	8,416,000	33,624,000
Cash and cash equivalents, end of year	12,829,000	8,627,000	8,416,000
Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	23,963,000	18,131,000	33,994,000
Investing activities:
Proceeds from foreign currency net investment hedge	1,421,000
Investing activities:
Cash paid for acquisitions, net	(592,000)	(12,378,000)	(212,139,000)
Purchases of equipment and leasehold improvements, net	(3,197,000)	(5,071,000)	(6,048,000)
Working capital and other settlements for acquisitions	(444,000)	(857,000)	(5,007,000)
Intercompany investments and other	(23,102,000)
Net cash provided by (used in) investing activities	(3,956,000)	(18,306,000)	(223,194,000)
Financing activities:
Repayment of subordinated unsecured notes payable	(270,000)	(2,193,000)	(2,421,000)
Other	(1,144,000)	449,000	166,473,000
Net cash provided by (used in) financing activities	(23,372,000)	(1,744,000)	164,052,000
Net increase (decrease) in cash and cash equivalents	(3,365,000)	(1,919,000)	(25,148,000)
Cash and cash equivalents, beginning of year	4,125,000	6,044,000	31,192,000
Cash and cash equivalents, end of year	760,000	4,125,000	6,044,000
Non-Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	12,392,000	6,646,000	5,549,000
Investing activities:
Cash paid for acquisitions, net	(2,726,000)	(96,592,000)	(110,109,000)
Purchases of equipment and leasehold improvements, net	(3,347,000)	(770,000)	(808,000)
Working capital and other settlements for acquisitions	(125,000)	1,284,000	(1,703,000)
Intercompany investments and other	(356,000)
Net cash provided by (used in) investing activities	(6,198,000)	(96,078,000)	(112,620,000)
Financing activities:
Net borrowings (repayments) under working capital facilities	2,772,000	(6,279,000)	35,621,000
Payment of deferred financing costs	(116,000)
Other		97,747,000	71,212,000
Net cash provided by (used in) financing activities	2,300,000	91,468,000	106,833,000
Exchange rate impact on cash and cash equivalents	(927,000)	94,000	178,000
Net increase (decrease) in cash and cash equivalents	7,567,000	2,130,000	(60,000)
Cash and cash equivalents, beginning of year	4,502,000	2,372,000	2,432,000
Cash and cash equivalents, end of year	12,069,000	4,502,000	2,372,000
Parent Company [Member]
Investing activities:
Intercompany investments and other	23,458,000
Financing activities:
Borrowings under senior secured revolving credit facility	142,473,000	170,640,000	278,000,000
Borrowings under senior unsecured notes payable			250,000,000
Proceeds from the exercise of options and warrants	24,261,000	2,258,000	2,292,000
Excess tax benefit related to share-based compensation	6,610,000	2,853,000
Purchases of stock for treasury		(387,000)	(9,421,000)
Payment of deferred financing costs	(56,000)	(1,074,000)	(9,746,000)
Repayment under senior secured revolving credit facility	(196,746,000)	(76,000,000)	(273,000,000)
Other		$ (98,290,000)	$ (238,125,000)