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Fair Value Measurements (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Interest Rate Swaps	$ 1,409	$ 98
Interest Rate Derivative Liabilities, At Fair Value	1,994	3,301
Interest rate swaps [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Swaps	1,409	98
Interest Rate Derivative Liabilities, At Fair Value	1,994	3,301
Interest rate swaps [Member] | Fair Value, Inputs, Level 1 [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Swaps	0	0
Interest Rate Derivative Liabilities, At Fair Value	0	0
Interest rate swaps [Member] | Fair Value, Inputs, Level 2 [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Swaps	1,409	98
Interest Rate Derivative Liabilities, At Fair Value	1,994	3,301
Interest rate swaps [Member] | Fair Value, Inputs, Level 3 [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Swaps	0	0
Interest Rate Derivative Liabilities, At Fair Value	0	0
Mortgage notes payable [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, At Fair Value	68,758	100,391
Mortgage notes payable [Member] | Fair Value, Inputs, Level 1 [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, At Fair Value	0	0
Mortgage notes payable [Member] | Fair Value, Inputs, Level 2 [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, At Fair Value	0	0
Mortgage notes payable [Member] | Fair Value, Inputs, Level 3 [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, At Fair Value	75,756	105,033
Unsecured term loan [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, At Fair Value	158,988	99,390
Unsecured term loan [Member] | Fair Value, Inputs, Level 1 [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, At Fair Value	0	0
Unsecured term loan [Member] | Fair Value, Inputs, Level 2 [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, At Fair Value	0	0
Unsecured term loan [Member] | Fair Value, Inputs, Level 3 [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, At Fair Value	165,971	97,742
Senior unsecured notes [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, At Fair Value	159,176	99,161
Senior unsecured notes [Member] | Fair Value, Inputs, Level 1 [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, At Fair Value	0	0
Senior unsecured notes [Member] | Fair Value, Inputs, Level 2 [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, At Fair Value	0	0
Senior unsecured notes [Member] | Fair Value, Inputs, Level 3 [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, At Fair Value	159,674	99,645
Revolving Credit Facility [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, At Fair Value	14,000	18,000
Revolving Credit Facility [Member] | Fair Value, Inputs, Level 1 [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, At Fair Value	0	0
Revolving Credit Facility [Member] | Fair Value, Inputs, Level 2 [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, At Fair Value	14,000	18,000
Revolving Credit Facility [Member] | Fair Value, Inputs, Level 3 [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Liabilities, At Fair Value	$ 0	$ 0

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- Definition

Fair value as of the balance sheet date of interest rate derivative assets, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13433-108611

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- Definition

Fair value as of the balance sheet date of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as liabilities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13433-108611

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