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Note 1 - Summary of Significant Accounting Policies (Details)	12 Months Ended
	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]
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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]
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Number of Years	1 year
Construction Completion [Member]
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Number of Years	1 year
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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