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Note 2 - Summary of Significant Accounting Policies (Detail) - Roll-forward of the allowance for doubtful accounts (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Balance at beginning of year	$ 8,525	$ 8,636	$ 8,948
Provision	3,198	2,178	921
Write-offs	(810)	(2,289)	(1,233)
Balance at end of year	$ 10,913	$ 8,525	$ 8,636

Amount of the current period expense charged against operations, the offset which is generally to the allowance for doubtful accounts for the purpose of reducing receivables, including notes receivable, to an amount that approximates their net realizable value (the amount expected to be collected).

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