Note 5 - Goodwill and Intangible Assets (Details) - Intangible Assets (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Amortizable intangible assets:
Gross carrying value	$ 335,433	$ 273,429
Accumulated amortization	(216,328)	(178,565)
Net carrying value	119,105	94,864
Customer Relationships [Member] | Minimum [Member]
Amortizable intangible assets:
Estimated useful lives	40 months	40 months
Customer Relationships [Member] | Maximum [Member]
Amortizable intangible assets:
Estimated useful lives	60 months	60 months
Customer Relationships [Member]
Amortizable intangible assets:
Gross carrying value	247,699	201,395
Accumulated amortization	(160,395)	(132,153)
Net carrying value	87,304	69,242
Trade Names [Member] | Minimum [Member]
Amortizable intangible assets:
Estimated useful lives	45 months	45 months
Trade Names [Member] | Maximum [Member]
Amortizable intangible assets:
Estimated useful lives	84 months	84 months
Trade Names [Member]
Amortizable intangible assets:
Gross carrying value	71,924	59,813
Accumulated amortization	(44,300)	(36,164)
Net carrying value	27,624	23,649
Noncompete Agreements [Member]
Amortizable intangible assets:
Estimated useful lives	36 months	36 months
Gross carrying value	6,487	4,714
Accumulated amortization	(3,818)	(2,986)
Net carrying value	2,669	1,728
Unpatented Technology [Member] | Minimum [Member]
Amortizable intangible assets:
Estimated useful lives	24 months	24 months
Unpatented Technology [Member] | Maximum [Member]
Amortizable intangible assets:
Estimated useful lives	40 months	40 months
Unpatented Technology [Member]
Amortizable intangible assets:
Gross carrying value	9,323	7,507
Accumulated amortization	(7,815)	(7,262)
Net carrying value	$ 1,508	$ 245