Note 3 - Supplemental Balance Sheet Information (Detail) - Accounts Payable and Accrued Expenses (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Vendor and other accrued expenses	$ 34,903	$ 29,818
Estimated casualty and healthcare liabilities	12,899	13,684
Job costs	14,077	14,654
Accrued compensation	12,943	10,454
Income tax payable and deferred income taxes	6,418	807
Total	$ 81,240	$ 69,417