Debt Instrument, Maturity Period, Extension Option

No definition available.

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- Definition

Debt Instrument, Percentage of Principal Amount Received

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt, Weighted Average Interest Rate with Interest Rate Swap Impact

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateEffectivePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

When presenting a range of interest rates, the highest effective rate for funds borrowed under the debt agreement as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMaximum
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

When presenting a range of interest rates, the lowest effective rate for funds borrowed under the debt agreement as of the balance sheet date.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMinimum
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentLineItems
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtWeightedAverageInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Debt - Textuals (Details) (USD $)	0 Months Ended	9 Months Ended		0 Months Ended		9 Months Ended		0 Months Ended				9 Months Ended		9 Months Ended
Debt - Textuals (Details) (USD $)	Jan. 07, 2014 Unsecured Term Loans $300.0 Million Unsecured Term Loan	Sep. 30, 2014 Unsecured Term Loans $300.0 Million Unsecured Term Loan	Jan. 07, 2014 Unsecured Term Loans $300.0 Million Unsecured Term Loan	Jan. 07, 2014 Unsecured Term Loans $300.0 Million Unsecured Term Loan Minimum	Jan. 07, 2014 Unsecured Term Loans $300.0 Million Unsecured Term Loan Maximum	Sep. 30, 2014 Unsecured Term Loans $155.0 Million Unsecured Term Loan	Jul. 20, 2012 Unsecured Term Loans $155.0 Million Unsecured Term Loan	Jul. 20, 2012 Unsecured Term Loans $155.0 Million Unsecured Term Loan Minimum	Jul. 20, 2012 Unsecured Term Loans $155.0 Million Unsecured Term Loan Maximum	Mar. 28, 2013 Unsecured Senior Notes Unsecured Senior Notes Due 2023	Jun. 26, 2014 Unsecured Senior Notes Unsecured Senior Notes Due 2021	Sep. 30, 2014 Mortgages	Sep. 30, 2014 Mortgages Variable Rate Mortgages	Sep. 30, 2014 Unsecured Revolving Credit Facility	Sep. 30, 2014 Unsecured Revolving Credit Facility Minimum	Sep. 30, 2014 Unsecured Revolving Credit Facility Maximum
Debt Instrument
Line of credit facility, borrowing capacity														$ 650,000,000
Unsecured credit agreement, extension option period	1 year													1 year
Description of variable rate basis	LIBOR													LIBOR
Basis spread on variable rate		1.20%		1.05%	1.95%	1.70%		1.55%	2.40%					1.30%	1.10%	1.75%
Line of credit facility, commitment fee percentage														0.25%	0.20%	0.50%
Debt instrument, face amount			$ 300,000,000				$ 155,000,000			$ 300,000,000	$ 300,000,000
Weighted average interest rate with interest rate swap impact		2.30%				2.99%							5.56%
Debt instrument, stated interest rate										3.70%	3.375%
Debt instrument, percentage of principal amount received										99.186%	99.205%
Debt instrument, effective interest rate										3.80%	3.50%
Effective percentage rate range, minimum												1.60%
Effective percentage rate range, maximum												12.75%
Weighted average interest rate												5.31%