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Note 12 - Business Segment Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Increase (Decrease) in Accounts Receivable (in Dollars)	$ (3,591)	$ 4,710
Cash and Cash Equivalents, Period Increase (Decrease) (in Dollars)	564	1,759
Waste Management Services [Member]
Increase (Decrease) in Accounts Receivable (in Dollars)	(6,500)
Cash and Cash Equivalents, Period Increase (Decrease) (in Dollars)	$ 2,700
Waste Management Services Segments Net Operating Revenues [Member]
Concentration Risk, Percentage	14.00%	22.00%
Consolidated Net Operating Revenues [Member]
Concentration Risk, Percentage	10.00%	18.00%

Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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