Note 3 - Supplemental Balance Sheet Information Schedule of Accrued Expenses (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Schedule of Accrued Expenses [Abstract]
Vendor and other accrued expenses	$ 36,778	$ 32,394
Estimated casualty and healthcare liabilities	13,775	12,899
Job costs	13,843	14,077
Accured compensation	15,942	12,943
Income tax payable and deferred income taxes	10,628	7,267
Total	$ 90,966	$ 79,580