Note 2 - Significant Accounting Policies - Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Property, plant and equipment, gross	$ 453,521	$ 403,819
Accumulated depreciation and amortization	(453,521)	(403,819)
Total	1,135,805	1,172,824
Land [Member]
Property, plant and equipment, gross	126,123	134,246
Accumulated depreciation and amortization	(126,123)	(134,246)
Building and Building Improvements [Member]
Property, plant and equipment, gross	377,070	313,706
Accumulated depreciation and amortization	$ (377,070)	$ (313,706)
Building and Building Improvements [Member] | Minimum [Member]
Buildings and improvements (Year)	10 years
Building and Building Improvements [Member] | Maximum [Member]
Buildings and improvements (Year)		39 years
Leasehold Improvements [Member]
Property, plant and equipment, gross	$ 26,925	$ 28,149
Accumulated depreciation and amortization	$ (26,925)	$ (28,149)
Leasehold Improvements [Member] | Minimum [Member]
Buildings and improvements (Year)	2 years
Leasehold Improvements [Member] | Maximum [Member]
Buildings and improvements (Year)		39 years
Machinery and Equipment [Member]
Property, plant and equipment, gross	$ 67,558	$ 59,455
Accumulated depreciation and amortization	$ (67,558)	$ (59,455)
Machinery and Equipment [Member] | Minimum [Member]
Buildings and improvements (Year)	5 years
Machinery and Equipment [Member] | Maximum [Member]
Buildings and improvements (Year)		20 years
Furniture and Fixtures [Member]
Property, plant and equipment, gross	$ 73,912	$ 74,201
Accumulated depreciation and amortization	$ (73,912)	$ (74,201)
Furniture and Fixtures [Member] | Minimum [Member]
Buildings and improvements (Year)	3 years
Furniture and Fixtures [Member] | Maximum [Member]
Buildings and improvements (Year)		15 years
Transportation Equipment [Member]
Property, plant and equipment, gross	$ 73,156	$ 74,761
Accumulated depreciation and amortization	$ (73,156)	$ (74,761)
Transportation Equipment [Member] | Minimum [Member]
Buildings and improvements (Year)	2 years
Transportation Equipment [Member] | Maximum [Member]
Buildings and improvements (Year)		15 years
Vehicles [Member]
Property, plant and equipment, gross	$ 832,661	$ 825,787
Accumulated depreciation and amortization	$ (832,661)	$ (825,787)
Vehicles [Member] | Minimum [Member]
Buildings and improvements (Year)	2 years
Vehicles [Member] | Maximum [Member]
Buildings and improvements (Year)		8 years
Construction in Progress [Member]
Property, plant and equipment, gross	$ 11,921	$ 66,338
Accumulated depreciation and amortization	$ (11,921)	$ (66,338)