Note 5 - Goodwill and Intangible Assets (Details) - Intangible Assets (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
Mar. 31, 2015	Dec. 31, 2014
Amortizable intangible assets:
Gross carrying value	325,418	328,424
Accumulated amortization	(233,790)	(225,841)
Net carrying value	91,628us-gaap_FiniteLivedIntangibleAssetsNet	102,583us-gaap_FiniteLivedIntangibleAssetsNet
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 value	239,707	244,211
Accumulated amortization	(174,154)	(167,943)
Net carrying value	65,553	76,268
Trade Names [Member]
Amortizable intangible assets:
Gross carrying value	67,176	68,264
Accumulated amortization	(47,146)	(45,901)
Net carrying value	20,030	22,363
Noncompete Agreements [Member]
Amortizable intangible assets:
Estimated useful lives	36 months	36 months
Gross carrying value	9,487	6,761
Accumulated amortization	(4,578)	(4,116)
Net carrying value	4,909	2,645
Unpatented Technology [Member]
Amortizable intangible assets:
Gross carrying value	9,048	9,188
Accumulated amortization	(7,912)	(7,881)
Net carrying value	1,136	1,307

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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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