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Note 10 - Leasing Activities (Details) - Future Minimum Rental Receivable (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Future Minimum Rental Receivable [Abstract]  
2015 $ 103,992us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableCurrent
2016 91,383us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInTwoYears
2017 73,073us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInThreeYears
2018 51,156us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInFourYears
2019 31,109us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInFiveYears
Thereafter 18,550us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableThereafter
Total $ 369,263us-gaap_OperatingLeasesFutureMinimumPaymentsReceivable