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Note 10 - Notes, Mortgages and Construction Loan Payable (Tables) | 9 Months Ended
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Sep. 30, 2018
Notes Tables |
Schedule of Debt [Table Text Block] |
Type |  | Date Paid |  | Amount Repaid |  |  | Interest Rate |  |  | Maturity Date
Senior Unsecured Notes (1) |  | Aug-18 |  | $ | 300.0 |  |  |  | 6.875 | % |  | Oct-19
Senior Unsecured Notes (2) |  | Jun-18 & Jul-18 |  | $ | 15.1 |  |  |  | 3.200 | % |  | May-21

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
Name: | us-gaap_ScheduleOfDebtTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_TableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration