Note 5 - Goodwill and Intangible Assets (Details) - Intangible Assets (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Amortizable intangible assets:
Gross carrying value	$ 341,362	$ 273,429
Accumulated amortization	(206,838)	(178,565)
Net carrying value	134,524	94,864
Customer Relationships [Member]
Amortizable intangible assets:
Gross carrying value	252,349	201,395
Accumulated amortization	(153,112)	(132,153)
Net carrying value	99,237	69,242
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
Trade Names [Member]
Amortizable intangible assets:
Gross carrying value	73,338	59,813
Accumulated amortization	(42,422)	(36,164)
Net carrying value	30,916	23,649
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
Noncompete Agreements [Member]
Amortizable intangible assets:
Estimated useful lives	36 months	36 months
Gross carrying value	6,193	4,714
Accumulated amortization	(3,567)	(2,986)
Net carrying value	2,626	1,728
Unpatented Technology [Member]
Amortizable intangible assets:
Gross carrying value	9,482	7,507
Accumulated amortization	(7,737)	(7,262)
Net carrying value	$ 1,745	$ 245
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