Note 10 - Accumulated Other Comprehensive Income (Detail) - Changes, net of tax, in Accumulated other comprehensive income are as follows: (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Balance at December 31, 2012	$ 927
Balance at December 31, 2012	19
Balance at December 31, 2012	946
Balance at March 31, 2013	3,798
Balance at March 31, 2013	(40)
Balance at March 31, 2013	3,758
Other comprehensive income (loss) before reclassifications	5,854
Other comprehensive income (loss) before reclassifications	(59)	5
Other comprehensive income (loss) before reclassifications	5,795
Amounts reclassified to realized gain	(1,216)
Amounts reclassified to realized gain	(1,216)
Amounts reclassified to benefit from income taxes	(1,767)
Net current period other comprehensive income (loss)	2,871	307
Net current period other comprehensive income (loss)	(59)
Net current period other comprehensive income (loss)	$ 2,812