Note 7 - Commitments and Contingencies (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Operating Leases, Rent Expense, Minimum Rentals	$ 15,200,000	$ 13,300,000	$ 12,600,000
Payments to Acquire Property, Plant, and Equipment	64,584,000	31,673,000	7,589,000
Charge-Backs Liabilities	13,504,000
Cost of Revenue	2,777,187,000	2,187,462,000	1,673,676,000
Self Insurance Reserve	12,400,000	10,400,000
Assumed Lifetime Oil Contracts [Member]
Deferred Revenue	3,990,000
Assumed Lifetime Oil Contract Loss Reserve [Member]
Cost of Revenue		1,000,000	1,000,000
Self-insured Lifetime Oil Contracts [Member]
Deferred Revenue	$ 33,923,000