Note 12 - Marketable Securities (Detail) - Marketable Securities (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Equity securities	$ 19,223	$ 16,210
Equity securities		(1)
Equity securities	33,428	30,462
Other debt securities	284	378
Other debt securities		(10)
Other debt securities	3,397	3,446
Total marketable securities	36,541	33,540
Total marketable securities	19,507	16,588
Total marketable securities		(11)
Total marketable securities	36,825	33,908
Amortized Cost [Member]
Equity securities	14,205	14,253
Other debt securities	3,113	3,078
Total marketable securities	$ 17,318	$ 17,331