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Note 1 - Summary of Significant Accounting Policies (Details) | 12 Months Ended
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Dec. 31, 2015 USD ($) shares | Dec. 31, 2014 USD ($) shares | Dec. 31, 2013 USD ($) shares
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Financing Receivable, Past Due, Term | 90 days |  |
Number of Portfolio Segments | 1 |  |
Capitalized Computer Software, Net | $ 16,100,000 | $ 24,000,000 |
Capitalized Computer Software, Amortization | 10,700,000 | 9,200,000 | $ 7,600,000
Allowance for Doubtful Accounts Receivable | 13,900,000 | 10,400,000 |
Unrecoverable Straight-line Rent Receivable | 17,900,000 | 22,900,000 |
Amount of Ineffectiveness on Net Investment Hedges | $ 2,014 | $ 0 | $ 0
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares) | shares | 5,300,680 | 7,137,120 | 10,950,388
Number of Equity Participation Plans | 2 |  |
Prior Plan [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares) | shares | 47,000,000 |  |
The 2010 Plan [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares) | shares | 10,000,000 |  |
Employee Stock Option [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Expiration Period | 10 years |  |
Notes Payable [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Unamortized Debt Issuance Expense | $ 31,400,000 |  |
Mortgage Payable [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Unamortized Debt Issuance Expense | $ 3,200,000 |  |
Reclassification of Debt Issuance Costs to Mortgages Payable [Member] | Notes Payable [Member] | Year Ended December 31 2014 [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Prior Period Reclassification Adjustment |  | $ 20,500,000 |
Reclassification of Debt Issuance Costs to Mortgages Payable [Member] | Mortgage Payable [Member] | Year Ended December 31 2014 [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Prior Period Reclassification Adjustment |  | $ 3,900,000 |
i [Member] | Restricted Stock [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Percent Vested | 100.00% |  |
iii [Member] | Restricted Stock [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 3 years |  |
iv [Member] | Restricted Stock [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 10 years |  |
Share-based Compensation Arrangement by Share-based Payment Award, Percent Vested | 20.00% |  |
Potential Adjustment [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Number of Years | 1 year |  |
Construction Completion [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Number of Years | 1 year |  |
After Issuance [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Number of Years | 1 year |  |
First Half [Member] | iii [Member] | Restricted Stock [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Percent Vested | 50.00% |  |
Second Half [Member] | iii [Member] | Restricted Stock [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 2 years |  |
Share-based Compensation Arrangement by Share-based Payment Award, Percent Vested | 50.00% |  |
Minimum [Member] | Employee Stock Option [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 3 years |  |
Minimum [Member] | Building and Building Improvements [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Property, Plant and Equipment, Useful Life | 15 years |  |
Minimum [Member] | ii [Member] | Restricted Stock [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 3 years |  |
Minimum [Member] | Computer Software, Intangible Asset [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Finite-Lived Intangible Asset, Useful Life | 3 years |  |
Maximum [Member] | Employee Stock Option [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 5 years |  |
Maximum [Member] | Building and Building Improvements [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Property, Plant and Equipment, Useful Life | 50 years |  |
Maximum [Member] | ii [Member] | Restricted Stock [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 4 years |  |
Maximum [Member] | Computer Software, Intangible Asset [Member] |  |  |
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items] |  |  |
Finite-Lived Intangible Asset, Useful Life | 5 years |  |

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