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Stockholders’ Equity of the Company and Partners' Capital of the Operating Partnership | 12 Months Ended
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Dec. 31, 2017
Stockholders' Equity Note [Abstract] |
Stockholders' Equity of the Company and Partners' Capital of the Operating Partnership | Stockholders’ Equity of the Company and Partners' Capital of the Operating Partnership Operating Partnership Units The Operating Partnership has issued General Partner Units, Limited Partner Units and preferred general partnership Units. The General Partner Units resulted from capital contributions from the Company. The Limited Partner Units are issued in conjunction with the acquisition of certain properties. Subject to certain lock-up periods, holders of Limited Partner Units can redeem their Units by providing written notification to the General Partner. Unless the General Partner provides notice of a redemption restriction to the holder, redemption must be made within seven business days after receipt of the holder’s notice. The redemption can be effectuated, as determined by the General Partner, either by exchanging the Limited Partner Units for shares of common stock of the Company on a one-for-one basis, subject to adjustment, or by paying cash equal to the fair market value of such shares. Prior requests for redemption have generally been fulfilled with shares of common stock of the Company, and the Operating Partnership intends to continue this practice. If each Limited Partner Unit of the Operating Partnership were redeemed as of December 31, 2017, the Operating Partnership could satisfy its redemption obligations by making an aggregate cash payment of approximately $126,139 or by issuing 4,008,221 shares of the Company’s common stock. The preferred general partnership Units result from preferred capital contributions from the Company. The Operating Partnership is required to make all required distributions on the preferred general partnership Units prior to any distribution of cash or assets to the holders of the Units. The consent of the holder of the Limited Partner Units is required to alter such holder’s rights as to allocations and distributions, to alter or modify such holder’s rights with respect to redemption, to cause the early termination of the Operating Partnership or to amend the provisions of the partnership agreement which requires such consent. Preferred Stock or General Partner Preferred Units The Company has 10,000,000 shares of preferred stock authorized. As of December 31, 2017 and 2016, there were no preferred shares or general partner preferred Units outstanding. Shares of Common Stock or Unit Contributions For the years ended December 31, 2017, 2016 and 2015, 31,154, 266,332 and 68,930 Limited Partner Units, respectively, were converted into an equivalent number of shares of common stock of the Company, resulting in a reclassification of $364, $2,862 and $673, respectively, of noncontrolling interest to the Company’s stockholders’ equity. During the year ended December 31, 2017, the Company issued 2,560,000 shares of the Company’s common stock in an underwritten public offering. Proceeds to the Company, net of the underwriter's discount, were $74,880. During the year ended December 31, 2016, the Company issued 5,600,000 shares of the Company’s common stock in an underwritten public offering. Proceeds to the Company, net of the underwriter's discount, were $124,936. The proceeds were contributed to the Operating Partnership in exchange for General Partner Units and are reflected in the Operating Partnership's financial statements as a general partner contribution. On March 13, 2014, we entered into distribution agreements with sales agents to sell up to 13,300,000 shares of the Company's common stock, for up to $200,000 aggregate gross sales proceeds, from time to time in "at-the-market" offerings (the "2014 ATM Program"). The distribution agreements entered into with respect to the 2014 ATM Program expired by their terms on March 13, 2017 and, on March 16, 2017, we entered into distribution agreements with sales agents to sell up to 8,000,000 shares of the Company's common stock, for up to $200,000 aggregate gross sales proceeds, from time to time in "at-the-market" offerings (the "2017 ATM Program"). Under the terms of the 2014 ATM Program and the 2017 ATM Program, sales were or are to be made primarily in transactions that are deemed to be "at-the-market" offerings, including sales made directly on the New York Stock Exchange or sales made through a market maker other than on an exchange or by privately negotiated transactions. During the years ended December 31, 2017, 2016 and 2015, the Company did not issue any shares of common stock under the 2014 ATM Program or the 2017 ATM Program. The following table is a roll-forward of the Company's shares of common stock outstanding and the Operating Partnership's Units outstanding, including unvested restricted stock or restricted Unit awards (see Note 11), for the three years ended December 31, 2017:
| Shares of Common Stock Outstanding |  | General Partner and Limited Partner Units Outstanding
Balance at December 31, 2014 | 110,600,866 |  |  | 114,975,503 |
Vesting of LTIP Unit Awards (As Defined in Note 11) | 224,990 |  |  | 224,990 |
Issuance of Restricted Stock/Restricted Unit Awards | 234,360 |  |  | 234,360 |
Repurchase and Retirement of Restricted Stock/Restricted Unit Awards | (101,921 | ) |  | (101,921 | )
Conversion of Limited Partner Units | 68,930 |  |  | — |
Balance at December 31, 2015 | 111,027,225 |  |  | 115,332,932 |
Issuance of Common Stock/Contribution of General Partner Units | 5,600,000 |  |  | 5,600,000 |
Issuance of Restricted Stock/Restricted Unit Awards | 322,833 |  |  | 322,833 |
Repurchase and Retirement of Restricted Stock/Restricted Unit Awards | (108,644 | ) |  | (108,644 | )
Conversion of Limited Partner Units | 266,332 |  |  | — |
Balance at December 31, 2016 | 117,107,746 |  |  | 121,147,121 |
Issuance of Common Stock/Contribution of General Partner Units | 2,560,000 |  |  | 2,560,000 |
Issuance of Restricted Stock/Restricted Unit Awards | 275,793 |  |  | 275,793 |
Repurchase and Retirement of Restricted Stock/Restricted Unit Awards | (91,513 | ) |  | (91,513 | )
Conversion of Limited Partner Units | 31,154 |  |  | — |
Balance at December 31, 2017 | 119,883,180 |  |  | 123,891,401 |
Dividends/Distributions The following table summarizes dividends/distributions accrued during the past three years:
| 2017 Total Dividend/ Distribution |  | 2016 Total Dividend/ Distribution |  | 2015 Total Dividend/ Distribution
Common Stock/Operating Partnership Units | $ | 104,106 |  |  | $ | 91,318 |  |  | $ | 59,014 |

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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 + Details
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