Common Stock	6 Months Ended
Jun. 30, 2014
Equity [Abstract]
Common Stock	Common Stock On January 10, 2014, the Company completed an underwritten public offering of 10,500,000 shares of its common stock at the public offering price of $18.15. On February 11, 2014, the Company sold an additional 1,325,000 shares of its common stock at the public offering price of $18.15 pursuant to the exercise of the underwriters’ option to purchase additional shares. The net proceeds from the offering, including shares sold pursuant to the underwriters’ option to purchase additional shares, after deducting the underwriting discount and offering expenses payable by the Company, were approximately $205.2 million, which the Company used to fund acquisitions, to repay amounts outstanding from time to time under its senior unsecured revolving credit facility and for general corporate purposes. On May 28, 2014, the Company entered into an ATM Equity Offering^SMSales Agreement (the "Sales Agreement") with various agents whereby it may sell, from time to time, shares of its common stock, par value $.001 per share, having aggregate gross sales proceeds of up to $150.0 million through an "at-the-market" equity offering program. Sales may be made to the agents in their capacity as sales agents or as principals. The Company intends to use the net proceeds for general corporate purposes, which may include repaying temporarily amounts outstanding from time to time under its unsecured revolving credit facility, for working capital and capital expenditures, and to fund potential acquisitions or development of office and parking properties. The Company is required to pay each agent a commission that will not exceed, but may be lower than, 2.0% of the gross sales price of the shares sold through such agent. During the three months ended June 30, 2014, the Company sold 171,800 shares of common stock under the program for net offering proceeds of approximately $3.5 million after deducting commissions of $53,000. The Company used the net proceeds for general corporate purposes, including repaying amounts outstanding under its unsecured revolving credit facility, and to fund acquisitions and development of office and parking properties.

Common Stock

6 Months Ended

Jun. 30, 2014

On January 10, 2014, the Company completed an underwritten public offering of 10,500,000 shares of its common stock at the public offering price of $18.15. On February 11, 2014, the Company sold an additional 1,325,000 shares of its common stock at the public offering price of $18.15 pursuant to the exercise of the underwriters’ option to purchase additional shares. The net proceeds from the offering, including shares sold pursuant to the underwriters’ option to purchase additional shares, after deducting the underwriting discount and offering expenses payable by the Company, were approximately $205.2 million, which the Company used to fund acquisitions, to repay amounts outstanding from time to time under its senior unsecured revolving credit facility and for general corporate purposes.

On May 28, 2014, the Company entered into an ATM Equity Offering^SMSales Agreement (the "Sales Agreement") with various agents whereby it may sell, from time to time, shares of its common stock, par value $.001 per share, having aggregate gross sales proceeds of up to $150.0 million through an "at-the-market" equity offering program. Sales may be made to the agents in their capacity as sales agents or as principals. The Company intends to use the net proceeds for general corporate purposes, which may include repaying temporarily amounts outstanding from time to time under its unsecured revolving credit facility, for working capital and capital expenditures, and to fund potential acquisitions or development of office and parking properties. The Company is required to pay each agent a commission that will not exceed, but may be lower than, 2.0% of the gross sales price of the shares sold through such agent.

During the three months ended June 30, 2014, the Company sold 171,800 shares of common stock under the program for net offering proceeds of approximately $3.5 million after deducting commissions of $53,000. The Company used the net proceeds for general corporate purposes, including repaying amounts outstanding under its unsecured revolving credit facility, and to fund acquisitions and development of office and parking properties.