Percentage of dividend per share

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- Definition

Percentage of increase in dividend per share

+ References

No definition available.

+ Details

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- Definition

Percentage of shareholder return annually

+ References

No definition available.

+ Details

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- Definition

Percentage of shareholder return annually achieving period

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No definition available.

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- Definition

Percentage of shareholder return on a prorated basis

+ References

No definition available.

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- Definition

Percentage of superior performance awards were deemed forfeited

+ References

No definition available.

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- Definition

Percentage of superior performance awards will earned if we perform at or above fiftieth percentile

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No definition available.

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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The per share amount of a dividend declared, but not paid, as of the financial reporting date.

+ References

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As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

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The weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, using a decimal to express in number of years.

+ References

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- Definition

The date when the equity-based award expires as specified in the award agreement, which may be presented in a variety of ways (for example, year, month and year, day, month and year, quarter of a year).

+ References

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Description of the period of time over which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, which may be expressed in a variety of ways (for example, in years, month and year).

+ References

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The maximum vesting term over which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition.

+ References

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The minimum vesting term over which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition.

+ References

No definition available.

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- Definition

The total fair value of equity-based awards for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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- Definition

The period of time an equity-based award is expected to be outstanding. An equity-based award's expected term is generally determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior.

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-SubTopic 10

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-Subparagraph (SAB TOPIC 14.D.2)

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section D

-Subsection 2

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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- Definition

The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices of vested portions of options outstanding and currently exercisable under the option plan as of the balance sheet date.

+ References

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The weighted average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on stock options awarded under the plan during the reporting period.

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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- Definition

The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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The number of shares newly issued during the reporting period under the plan.

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Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

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The weighted average remaining life of the exercisable stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

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The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

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Balance Type:	na
Period Type:	instant

Stock Awards (Narrative) (Details) (USD $)	12 Months Ended
Stock Awards (Narrative) (Details) (USD $)	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008	Dec. 31, 2007
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reserved shares of common stock for awards under the Equity Incentive Plan	7,441,180
Common stock remaining for future stock awards	3,716,379
Maximum number of shares of common stock that may be awarded	1,000,000
Stock award vesting period (in years)	ten			four
Number of stock options awarded				50,000
Stock award payment award, exercise price, per share				$ 12.09
Stock award payment award, estimated grant date fair value, per share				$ 1.36
Share based payment award, expiration period				2012
Share based payment award, expected volatility rate				28.34%
Share based payment award, weighted average risk-free rate of return				4.62%
Common stock options awarded, dividend yield				8.93%
Common stock options awarded, intrinsic value of options exercisable and outstanding	$ 0
Common stock options awarded, options outstanding and exercisable	130,000
Common stock options awarded, weighted-average exercise price, per option	$ 10.80
Common stock options awarded, weighted average remaining contractual term (in years)	3.0
Stock award vesting period in years, maximum	seven
Stock award vesting period in years, minimum	three
Percentage of shareholder return annually	9.50%
Percentage of shareholder return annually achieving period (in years)	3
Percentage of SPRE awards earned when the Company performed at or above the 50th percentile of real estate trusts included in the Morgan Stanley REIT Index in terms of return to shareholders	33.334%
Percentage of superior performance awards deemed forfeited	66.666%
Percentage of dividend per share	20.00%
Common share distribution		$ 1.13	$ 1.10	$ 1.08
Percentage of increase in dividend per share		3.00%
Stock-based compensation expense	6,600,000	5,500,000	6,400,000
Stock-based compensation expense, unrecognized cost	9,600,000
Stock-based compensation expense, unrecognized cost, weighted average period (in years)	2.4
Restricted equity awards, fair value	$ 6,100,000
Time-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock award vesting period (in years)				three
Stock award vesting period in years, maximum	seven
Stock award vesting period in years, minimum	three
Service-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock award vesting period (in years)				seven
Superior Performance Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock award vesting period (in years)	three
Share based payment award, expected volatility rate	27.00%
Share based payment award, weighted average risk-free rate of return	4.55%
Share-based compensation arrangement by share based payment award, expected term (in years)	3.4
Core Performance Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock award vesting period (in years)				seven
Number of stock options awarded	79,287	79,287
Share based payment award, expected volatility rate	26.00%
Share based payment award, weighted average risk-free rate of return	4.65%
Percentage of shareholder return annually				9.00%
Percentage of shareholder return on a prorated basis				7.50%
Share-based compensation arrangement by share based payment award, expected term (in years)	6.4