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Note 5 - Costs and Estimated Earnings and Billings on Uncompleted Contracts (Detail) - Excess billings ofer costs and estimated earnings on uncompleted contracts: (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Costs incurred and estimated earnings on uncompleted contracts	$ 1,361,973	$ 997,527
Billings on uncompleted contracts	(1,360,299)	(999,601)
Excess of costs incurred and estimated earnings over billings (excess of billings over costs incurred and estimated earnings) on uncompleted contracts	$ 1,674	$ (2,074)