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Mortgages and Notes Payable (Details) | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2016 USD ($) extensions | Mar. 31, 2015 USD ($) | Apr. 19, 2016 USD ($) | Dec. 31, 2015 USD ($)
Debt Instrument [Line Items] |  |  |  |
Mortgages and notes payable, net | $ 2,100,937,000 |  |  | $ 2,491,813,000
Unamortized debt issuance costs | (7,074,000) |  |  | (7,801,000)
Repayment of bridge credit facility | 107,400,000 | $ 91,900,000 |  |
Revolving Credit Facility due 2018 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum borrowing capacity on revolving credit facility | $ 475,000,000 |  |  |
Maturity date on revolving credit facility | Jan. 01, 2018 |  |  |
Additional borrowing capacity on revolving credit facility | $ 75,000,000 |  |  |
Number of additional maturity extensions | extensions | 2 |  |  |
Term of optional extension | 6 months |  |  |
Facility interest rate basis | LIBOR plus 110 basis points |  |  |
Interest rate spread (in hundredths) | 1.10% |  |  |
Annual facility fee (in hundredths) | 0.20% |  |  |
Amount outstanding on revolving credit facility | $ 258,000,000 |  |  |
Outstanding letters of credit on revolving credit facility | 200,000 |  |  |
Unused borrowing capacity on revolving credit facility | $ 216,800,000 |  |  |
Bridge Term Loan Facility due 2016 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maturity date on revolving credit facility | Mar. 28, 2016 |  |  |
Repayment of bridge credit facility | $ 350,000,000 |  |  |
Secured indebtedness [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and notes payable, net | 174,475,000 |  |  | 175,281,000
Aggregate undepreciated book value of secured real estate assets | 315,800,000 |  |  |
Unsecured indebtedness [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Mortgages and notes payable, net | $ 1,933,536,000 |  |  | $ 2,324,333,000
Subsequent Event [Member] | Revolving Credit Facility due 2018 [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Amount outstanding on revolving credit facility |  |  | $ 257,000,000 |
Outstanding letters of credit on revolving credit facility |  |  | 200,000 |
Unused borrowing capacity on revolving credit facility |  |  | $ 217,800,000 |

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- Definition Amount of additional borrowing capacity that may be granted under an accordion feature of the credit facility, subject to additional lender commitments. + References No definition available. + Details
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- Definition Amount after accumulated amortization of debt issuance costs. Includes, but not limited to, legal, accounting, underwriting, printing, and registration costs. + References No definition available. + Details
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- Definition The number of optional extensions available to extend the loan maturity date. + References No definition available. + Details
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- Definition The period for which there is an option to extend the maturity date of the facility, debt instrument or loan receivable, in years. + References No definition available. + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 + Details
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- Definition Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions). + 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 + Details
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- 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 + Details
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