Note 3 - Restricted Cash and Cash Equivalents and Restricted Investments Available for Sale (Detail) - Change In Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Decrease in comprehensive income	$ 0	$ (12)	$ (3)	$ (25)