Note 15 - Fair Value Disclosure of Financial Instruments (Details) - Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Assets:
Marketable equity securities	$ 5,909	$ 87,659
Fair Value, Measurements, Recurring [Member]
Assets:
Marketable equity securities	5,909	87,659
Liabilities:
Interest rate swaps	1,426	1,404
Fair Value, Measurements, Nonrecurring [Member]
Liabilities:
Real estate	52,439	80,270
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Marketable equity securities	5,909	87,659
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Liabilities:
Interest rate swaps	1,426	1,404
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Liabilities:
Real estate	$ 52,439	$ 80,270