Note 5 - Goodwill and Intangible Assets (Detail) - Intangible Assets (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Amortizable intangible assets:
Gross carrying amount	216,085	215,406
Accumulated amortization	(94,399)	(69,238)
Net carrying value	121,686	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	158,338	157,826
Accumulated amortization	(68,712)	(50,438)
Net carrying value	89,626	107,388
Trade Names [Member]
Amortizable intangible assets:
Gross carrying amount	48,185	48,046
Accumulated amortization	(18,473)	(13,277)
Net carrying value	29,712	34,769
Noncompete Agreements [Member]
Amortizable intangible assets:
Estimated useful lives	36 months	36 months
Gross carrying amount	2,789	2,784
Accumulated amortization	(1,975)	(1,587)
Net carrying value	814	1,197
Unpatented Technology [Member]
Amortizable intangible assets:
Gross carrying amount	6,773	6,750
Accumulated amortization	(5,239)	(3,936)
Net carrying value	1,534	2,814