Note 5 - Acquisition (Details) - Assets Acquired and Liabilities Assumed (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Note 5 - Acquisition (Details) - Assets Acquired and Liabilities Assumed [Line Items]
Receivables, net		$ 22,822
Inventories		5,779
Property, plant and equipment, net		4,932
Goodwill	88,320	87,388
Deferred tax asset		203
Total assets acquired		68,526
Accounts payable		7,002
Accrued liabilities		4,149
Other noncurrent liabilities		4,300
Total liabilities assumed		15,451
Total cash conveyed at closing		53,075
Acquisition of Alliance [Member]
Note 5 - Acquisition (Details) - Assets Acquired and Liabilities Assumed [Line Items]
Goodwill		13,268
Customer Relationships [Member]
Note 5 - Acquisition (Details) - Assets Acquired and Liabilities Assumed [Line Items]
Finite-lived intangible assets		17,807
Trade Names [Member]
Note 5 - Acquisition (Details) - Assets Acquired and Liabilities Assumed [Line Items]
Finite-lived intangible assets		2,090
Employment Contracts [Member]
Note 5 - Acquisition (Details) - Assets Acquired and Liabilities Assumed [Line Items]
Finite-lived intangible assets		$ 1,625