Note 2 - Acquisition of Chicago Tube and Iron Company (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Number of Operating Facilities	9
Business Acquisition, Cost of Acquired Entity, Cash Paid		$ 159,856
Business Acquisition, Cost of Acquired Entity, Purchase Price		150,000
Business Acquisition, Cost of Acquired Entity, Liabilities Incurred	5,880	5,880
Business Acquisition, Purchase Price Allocation, Current Assets, Cash and Cash Equivalents		11,097
Business Combination, Acquisition Related Costs		3,620	1,338
Dr. McNeely [Member]
Business Acquisition, Cost of Acquired Entity, Cash Paid		5,000
Administrative and General [Member]
Business Combination, Acquisition Related Costs		919
Ancillary Acquisition Costs [Member]
Business Acquisition, Cost of Acquired Entity, Cash Paid		$ 9,856