Note 5 - Accumulated Other Comprehensive Income (Details) - Changes in Accumulated Other Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended								6 Months Ended
	Jun. 30, 2013		Mar. 31, 2013		Jun. 30, 2012		Mar. 31, 2012		Jun. 30, 2013		Jun. 30, 2012		Dec. 30, 2012
Changes in Accumulated Other Comprehensive Income [Abstract]
Balance	$ 4,265	[1]	$ 5,391		$ 4,501	[1]	$ 4,541	[1]	$ 5,391		$ 4,541	[1]	$ 5,391	[1]
Period change	(4,455)	[1]	(1,126)	[1]	1,048	[1]	(40)	[1]	(5,581)		1,008
Other comprehensive loss before reclassification	(4,462)	[1]	(1,004)	[1]	1,244	[1]	(40)	[1]
Amount reclassified from accumulated other comprehensive income	7	[1]	(122)	[1]	(196)	[1]	0	[1]
Balance	$ (190)	[1]	$ 4,265	[1]	$ 5,549	[1]	$ 4,501	[1]	$ (190)	[1]	$ 5,549	[1]	$ 5,391	[1]

[1] All amounts are net of tax. Amounts in parentheses indicate debits.