Note 5 - Goodwill and Intangible Assets (Detail) - Intangible Assets (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2012	Dec. 31, 2011
Amortizable intangible assets:
Gross carrying amount	$ 217,754	$ 215,406
Accumulated amortization	(82,538)	(69,238)
Net carrying value	135,216	146,168
Customer Relationships [Member]
Amortizable intangible assets:
Estimated useful lives	40 to 60 months	40 to 60 months
Gross carrying amount	159,601	157,826
Accumulated amortization	(60,037)	(50,438)
Net carrying value	99,564	107,388
Trade Names [Member]
Amortizable intangible assets:
Estimated useful lives	45 to 84 months	45 to 84 months
Gross carrying amount	48,521	48,046
Accumulated amortization	(16,072)	(13,277)
Net carrying value	32,449	34,769
Noncompete Agreements [Member]
Amortizable intangible assets:
Estimated useful lives	36 months	36 months
Gross carrying amount	2,799	2,784
Accumulated amortization	(1,795)	(1,587)
Net carrying value	1,004	1,197
Unpatented Technology [Member]
Amortizable intangible assets:
Estimated useful lives	24 to 40 months	24 to 40 months
Gross carrying amount	6,833	6,750
Accumulated amortization	(4,634)	(3,936)
Net carrying value	$ 2,199	$ 2,814