Note 5 - Goodwill and Intangible Assets (Details) - Intangible Assets (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Amortizable intangible assets:
Gross carrying value	328,424	273,429
Accumulated amortization	(225,841)	(178,565)
Net carrying value	102,583us-gaap_FiniteLivedIntangibleAssetsNet	94,864us-gaap_FiniteLivedIntangibleAssetsNet
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	244,211	201,395
Accumulated amortization	(167,943)	(132,153)
Net carrying value	76,268	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	68,264	59,813
Accumulated amortization	(45,901)	(36,164)
Net carrying value	22,363	23,649
Noncompete Agreements [Member]
Amortizable intangible assets:
Estimated useful lives	36 months	36 months
Gross carrying value	6,761	4,714
Accumulated amortization	(4,116)	(2,986)
Net carrying value	2,645	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	9,188	7,507
Accumulated amortization	(7,881)	(7,262)
Net carrying value	1,307	245

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

+ Details

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- Definition

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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