XML 123 R102.htm IDEA: XBRL DOCUMENT
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Subsequent Events subsequent Events (Details) | Feb. 03, 2017 USD ($) shares | Jan. 25, 2017 USD ($) yr indices tiers | Dec. 31, 2016 shares | May 17, 2016 shares | Dec. 31, 2015 shares | May 20, 2014 shares
--- | --- | --- | --- | --- | --- | ---
Subsequent Event [Line Items] |  |  |  |  |  |
Common stock, shares issued | shares |  |  | 153,869,075 | 1,507 | 153,658,866 | 7,542
MYLTIPS 2017 | NAREIT Office Index adjusted [Member] |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Weighted Percentage of Index Used to Compare to TSR |  | 50.00% |  |  |  |
MYLTIP vesting 2021 | MYLTIPS 2017 |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Vesting Percentage |  | 50.00% |  |  |  |
Subsequent Event [Member] |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
LTIP units issued (in shares) | shares | 100,639 |  |  |  |  |
Subsequent Event [Member] | MYLTIPS 2017 |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Threshold Tier |  | $ 10,700,000 |  |  |  |
Target Tier |  | 21,300,000 |  |  |  |
High Tier |  | 32,000,000 |  |  |  |
Exceptional Tier |  | $ 42,700,000 |  |  |  |
Indices Used to Compare TSR | indices |  | 2 |  |  |  |
Number of Tiers | tiers |  | 4 |  |  |  |
Percentage of annualized TSR for Reduction of Earned Awards |  | 0.00% |  |  |  |
Percentage to Cause Some Awards to be Earned Even if on a Relative Basis it Would Not Result in any Earned Awards |  | 12.00% |  |  |  |
Distributions percent before measurement date |  | 10.00% |  |  |  |
Value of MYLTIP Awards |  | $ 17,700,000 |  |  |  |
MYLTIP Value Amortized Into Earnings, Years | yr |  | 4 |  |  |  |
TSR measurement (in years) | yr |  | 3 |  |  |  |
Subsequent Event [Member] | MYLTIPS 2017 | Cohen & Steers Realty Majors Portfolio Index [Member] |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Weighted Percentage of Index Used to Compare to TSR |  | 50.00% |  |  |  |
Subsequent Event [Member] | MYLTIP 2014 |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Final awards percentage of target | 27.70% |  |  |  |  |
Value of MYLTIP Awards | $ 3,500,000 |  |  |  |  |
MYLTIP Units forfeited | shares | 447,386 |  |  |  |  |
Subsequent Event [Member] | Minimum [Member] | MYLTIPS 2017 |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Potential Awards Earned |  | $ 0 |  |  |  |
Subsequent Event [Member] | Maximum [Member] | MYLTIPS 2017 |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Potential Awards Earned |  | $ 42,700,000 |  |  |  |
Subsequent Event [Member] | MYLTIP vesting 2020 | MYLTIPS 2017 |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Vesting Percentage |  | 50.00% |  |  |  |
Subsequent Event [Member] | Restricted Stock [Member] |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |
Common stock, shares issued | shares | 35,839 |  |  |  |  |

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