Note 5 - Goodwill and Intangible Assets (Detail) - Intangible Assets (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2012	Dec. 31, 2011
Amortizable intangible assets:
Gross carrying amount	268,917	215,406
Accumulated amortization	(108,412)	(69,238)
Net carrying value	160,505	146,168
Minimum [Member] | Customer Relationships [Member]
Amortizable intangible assets:
Estimated useful lives	40 months	40 months
Minimum [Member] | Trade Names [Member]
Amortizable intangible assets:
Estimated useful lives	45 months	45 months
Minimum [Member] | Unpatented Technology [Member]
Amortizable intangible assets:
Estimated useful lives	24 months	24 months
Maximum [Member] | Customer Relationships [Member]
Amortizable intangible assets:
Estimated useful lives	60 months	60 months
Maximum [Member] | Trade Names [Member]
Amortizable intangible assets:
Estimated useful lives	84 months	84 months
Maximum [Member] | Unpatented Technology [Member]
Amortizable intangible assets:
Estimated useful lives	40 months	40 months
Customer Relationships [Member]
Amortizable intangible assets:
Gross carrying amount	198,780	157,826
Accumulated amortization	(79,103)	(50,438)
Net carrying value	119,677	107,388
Trade Names [Member]
Amortizable intangible assets:
Gross carrying amount	59,583	48,046
Accumulated amortization	(21,354)	(13,277)
Net carrying value	38,229	34,769
Noncompete Agreements [Member]
Amortizable intangible assets:
Estimated useful lives	36 months	36 months
Gross carrying amount	3,292	2,784
Accumulated amortization	(2,148)	(1,587)
Net carrying value	1,144	1,197
Unpatented Technology [Member]
Amortizable intangible assets:
Gross carrying amount	7,262	6,750
Accumulated amortization	(5,807)	(3,936)
Net carrying value	1,455	2,814