Note 11 - Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2013

Investments, Debt and Equity Securities [Abstract]

Marketable Securities [Table Text Block]

	December 31, 2013
	Amortized Cost		Gross Unrealized Gains		Estimated Fair Value
Available-for-sale:
Equity securities	$	33,728	$	25,995	$	59,723
Held-to-maturity:
Debt securities		3,043		59		3,102
Total marketable securities	$	36,771	$	26,054	$	62,825

	December 31, 2012
	Amortized Cost		Gross Unrealized Gains		Estimated Fair Value
Available-for-sale:
Equity securities	$	14,205	$	19,223	$	33,428
Held-to-maturity:
Debt securities		3,113		284		3,397
Total marketable securities	$	17,318	$	19,507	$	36,825