Absolute Total Shareholder Return Reduced on a Linear Basis, Percent

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Amount of Underperformance of SNL Equity REIT Index, Percent

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Amount Total Shareholder Return Exceeds Simple Annual Total Shareholder Return, Percent

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Amount Total Shareholder Return Exceeds SNL Equity REIT Index, Percent

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Award Performance Period

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Maximum Share Value Authorized Under Plan

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Simple Annual Total Shareholder Return, Percent

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Underperformance of SNL Equity REIT Index per Year, Percent

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Forfeiture Adjustment as Percent of Total Cost

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- Definition

Simple Total Shareholder Return Reduced on a Linear Basis, Percent

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No definition available.

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- Definition

This element represents the amount of recognized equity-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). Alternate captions include the words "stock-based compensation".

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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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- Definition

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

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- Definition

Unrecognized cost of unvested share-based compensation awards.

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Period 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, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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 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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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Equity - Outperformance Program (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period	3 years
Amortization of stock-based compensation	$ 8,832	$ 7,979	$ 6,682
Share-based compensation, cost not yet recognized	$ 27,300
Share-based compensation, cost not yet recognized, period for recognition	2 years 11 months 21 days
Additional Paid in Capital
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amortization of stock-based compensation		7,979	6,682
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	2 years
Outperformance Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage Amount TSR Exceeds Simple Annual TSR	4.00%
Simple Annual TSR	9.00%
Percent TSR Exceeds SNL Equity REIT Index	4.00%
Percent of Underperformance of SNL Equity REIT Index	4.00%
Underperformance of SNL Equity REIT Index per Year	3.00%
Forfeiture adjustment as percent of total cost	6.00%
Outperformance Program \| Additional Paid in Capital
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amortization of stock-based compensation	$ 8,832	7,979	6,682
Outperformance Program \| General and Administrative Expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	8,421	7,559	6
Outperformance Program \| Deferred Leasing Costs and Lease Intangibles, Net
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 411	420	228
Outperformance Program \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Absolute TSR Reduced on a Linear Basis	100.00%
Simple TSR Reduced on a Linear Basis	7.00%
Outperformance Program \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Absolute TSR Reduced on a Linear Basis	0.00%
Simple TSR Reduced on a Linear Basis	0.00%
2012 Outperformance Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum share value authorized under plan				$ 10,000
Stock settled awards				$ 3,500
Risk free interest rate				0.40%
Total dividend payments over the measurement period per share				1.62%
2012 Outperformance Program \| The Company
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility rate				36.00%
2012 Outperformance Program \| SNL Equity REIT Index
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility rate				35.00%
2013 Outperformance Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum share value authorized under plan			11,000
Stock settled awards			$ 4,100
Risk free interest rate			0.38%
Total dividend payments over the measurement period per share			1.50%
2013 Outperformance Program \| The Company
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility rate			33.00%
2013 Outperformance Program \| SNL Equity REIT Index
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility rate			25.00%
2014 Outperformance Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum share value authorized under plan		12,000
Stock settled awards		$ 3,200
Risk free interest rate		0.77%
Total dividend payments over the measurement period per share		1.50%
2014 Outperformance Program \| The Company
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility rate		28.00%
2014 Outperformance Program \| SNL Equity REIT Index
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility rate		26.00%
2015 Outperformance Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum share value authorized under plan	$ 15,000
Stock settled awards	$ 4,300
Risk free interest rate	1.13%
Total dividend payments over the measurement period per share	1.50%
2015 Outperformance Program \| The Company
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility rate	22.00%
2015 Outperformance Program \| SNL Equity REIT Index
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility rate	22.00%