Note 16 - Fair Value Disclosure of Financial Instruments - Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Marketable equity securities	$ 6,502	$ 5,909
Fair Value, Measurements, Nonrecurring [Member]
Real estate	117,930	52,439
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member]
Real estate
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member]
Real estate
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Real estate	117,930	52,439
Fair Value, Measurements, Recurring [Member]
Marketable equity securities	6,502	5,909
Interest rate swaps	975	1,426
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Marketable equity securities	6,502	5,909
Interest rate swaps
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Marketable equity securities
Interest rate swaps	975	1,426
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Marketable equity securities
Interest rate swaps