Note 3 - Acquisitions (Details) - Preliminary Allocation of Purchase Price 2014 (USD $) In Thousands, unless otherwise specified							3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 2014 Acquisitions [Member] Customer Relationships [Member]	Mar. 31, 2014 2014 Acquisitions [Member] Trade Names [Member]	Mar. 31, 2014 2014 Acquisitions [Member] Noncompete Agreements [Member]	Mar. 31, 2014 2014 Acquisitions [Member] Unpatented Technology [Member]	Mar. 31, 2014 2014 Acquisitions [Member]	Mar. 31, 2014 2014 Acquisitions [Member]
Note 3 - Acquisitions (Details) - Preliminary Allocation of Purchase Price 2014 [Line Items]
Equipment and leasehold improvements							$ 480	$ 480
Intangible assets			33,869	5,535	343	1,490
Goodwill	438,998	369,312					68,201	68,201
Net deferred tax liability associated with step-up in book basis							(12,375)	(12,375)
Assets acquired and liabilities assumed, net							6,543	6,543
Total							$ 104,100	$ 104,086