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Equity, Capital and Other Interests - Issued and Outstanding Preferred Shares and Preference Units (Details) - USD ($) $ / shares in Units, $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2017 | Dec. 31, 2016
Class Of Stock [Line Items] |  |
8.29% Series K Cumulative Redeemable Preferred; liquidation value $50 per share; 745,600 shares issued and outstanding at June 30, 2017 and December 31, 2016 | $ 37,280 | $ 37,280
ERPOP [Member] |  |
Class Of Stock [Line Items] |  |
8.29% Series K Cumulative Redeemable Preferred; liquidation value $50 per share; 745,600 shares issued and outstanding at June 30, 2017 and December 31, 2016 | $ 37,280 | 37,280
Series K Preferred Stock [Member] |  |
Class Of Stock [Line Items] |  |
Preferred Stocks Preference Units Redemption Date | Dec. 10, 2026 |
Annual Dividend Per Preferred Share Preference Unit | $ 4.145 |
8.29% Series K Cumulative Redeemable Preferred; liquidation value $50 per share; 745,600 shares issued and outstanding at June 30, 2017 and December 31, 2016 | $ 37,280 | 37,280
Series K Preferred Stock [Member] | ERPOP [Member] |  |
Class Of Stock [Line Items] |  |
Preferred Stocks Preference Units Redemption Date | Dec. 10, 2026 |
Annual Dividend Per Preferred Share Preference Unit | $ 4.145 |
8.29% Series K Cumulative Redeemable Preferred; liquidation value $50 per share; 745,600 shares issued and outstanding at June 30, 2017 and December 31, 2016 | $ 37,280 | $ 37,280

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- Definition The date at which or after redeemable preferred stock/preference units may be redeemed for cash at the option of the company in whole or in part at a redemption price equal to the liquidation price per share/units plus accrued and unpaid distributions if any. + References No definition available. + Details
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- Definition Value of all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by shareholders, which is net of related treasury stock. May be all or a portion of the number of preferred shares authorized. These shares represent the ownership interest of the preferred shareholders. + 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(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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