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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Key Components of Share-based Awards | The following table outlines key components of the 2017 and 2016 OPP Plans:
| 2017 OPP Plan |  | 2016 OPP Plan
Maximum bonus pool, in millions | $20.0 |  | $17.5
Performance period | 1/1/2017 to 12/31/2019 |  | 1/1/2016 to 12/31/2018
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions | The per unit fair value of one-time retention award granted was estimated on the date of grant using the following assumptions in the Monte Carlo valuation:
| Assumptions
Expected price volatility for the Company | 23.00%
Expected price volatility for the particular REIT index | 18.00%
Risk-free rate | 1.63%
Dividend yield | 3.20
The per unit fair value of OPP award granted was estimated on the date of grant using the following assumptions in the Monte Carlo valuation:
| 2017 |  | 2016 |  | 2015
Expected price volatility for the Company | 24.00% |  | 24.00% |  | 22.00%
Expected price volatility for the particular REIT index | 17.00% |  | 17.00% |  | 22.00%
Risk-free rate | 1.47% |  | 1.09% |  | 1.13%
Dividend yield | 2.30 |  | 2.40 |  | 1.50
Nonvested Restricted Stock Shares Activity | The following table summarizes the activity and status of all unvested awards:
|  | 2017 |  | 2016 |  | 2015
|  | Shares |  | Weighted-Average Grant-Date Fair Value |  | Shares |  | Weighted-Average Grant-Date Fair Value |  | Shares |  | Weighted-Average Grant-Date Fair Value
Unvested at January 1 |  | 887,179 |  |  | $ | 31.09 |  |  | 827,950 |  |  | $ | 28.92 |  |  | 543,707 |  |  | $ | 26.43 |
Granted |  | 918,884 |  |  | 34.37 |  |  | 489,826 |  |  | 30.95 |  |  | 629,504 |  |  | 29.01 |
Vested |  | (705,508 | ) |  | 31.42 |  |  | (430,597 | ) |  | 26.75 |  |  | (335,544 | ) |  | 24.80 |
Canceled |  | (13,369 | ) |  | 32.14 |  |  | — |  |  | — |  |  | (9,717 | ) |  | 38.17 |
Unvested at December 31 |  | 1,087,186 |  |  | $ | 33.64 |  |  | 887,179 |  |  | $ | 31.09 |  |  | 827,950 |  |  | $ | 28.92 |
Year Ended December 31, |  | Non-Vested Shares Issued |  | Weighted Average Grant-Date Fair Value |  | Vested Shares |  | Total Vest-Date Fair Value (in thousands)
2017 |  | 918,884 |  |  | $ | 34.37 |  |  | (705,508 | ) |  | $ | 24,155 |
2016 |  | 489,826 |  |  | 30.95 |  |  | (430,597 | ) |  | 14,736 |
2015 |  | 629,504 |  |  | 29.01 |  |  | (335,544 | ) |  | 9,606 |
Stock Compensation Related to OPP Plans and Restricted Stock Awards | The following table presents the classification and amount recognized for stock-based compensation related to the Company’s awards:
| For the Year Ended December 31,
| 2017 |  | 2016 |  | 2015
Expensed stock compensation(1) | $ | 15,079 |  |  | $ | 14,144 |  |  | $ | 8,421 |
Capitalized stock compensation(2) | 836 |  |  | 510 |  |  | 411 |
Total stock compensation(3) | $ | 15,915 |  |  | $ | 14,654 |  |  | $ | 8,832 |
_________________
(1) | Amounts are recorded in general and administrative expenses in the Consolidated Statements of Operations.
(2) | Amounts are recorded in deferred leasing costs and lease intangible assets, net and investment in real estate, at cost in the Consolidated Balance Sheets.
(3) | Amounts are recorded in additional paid-in capital and non-controlling interest—units in the operating partnership in the Consolidated Balance Sheets.

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- Definition Tabular disclosure of components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5047-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of employee stock purchase plans, including, but not limited to: (a) expected term, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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