Preferred Stock and Units	3 Months Ended
Mar. 31, 2018
Preferred Stock And Units [Abstract]
Preferred Stock and Units	7. Preferred Stock and Units Preferred Stock - The Company is authorized to issue up to 11,000,000 shares of preferred stock. As of March 31, 2018 and December 31, 2017, there were 1,610,000 shares, respectively, of the Series B Cumulative Redeemable Perpetual Preferred Stock (the “Series B Preferred Stock”) issued and outstanding. As of March 31, 2018 and December 31, 2017, there were 1,300,000 shares, respectively, of the Series C Preferred Stock issued and outstanding. In October 2017, the Company issued 1,300,000 shares of Series C Preferred Stock, for net proceeds after all estimated expenses of approximately $30.5 million. The Company contributed the net proceeds from the offering to its Operating Partnership for an equivalent number of Series C Preferred Units. Holders of the Company’s Series C Preferred Stock are entitled to receive distributions when authorized by the Company’s board of directors out of assets legally available for the payment of distributions. The Company pays cumulative cash distributions on the Series C Preferred Stock at a rate of 7.875% per annum of the $25.00 liquidation preference per share. The Series C Preferred Stock is not redeemable by the holders, has no maturity date and is not convertible into any other security of the Company or its affiliates. On August 23, 2016, the Company issued 1,610,000 shares of its Series B Preferred Stock for net proceeds after all expenses of approximately $37.8 million, which it contributed to the Operating Partnership for an equivalent number of preferred partnership units. Holders of the Company’s Series B Preferred Stock are entitled to receive distributions when authorized by the Company’s board of directors out of assets legally available for the payment of distributions. The Company pays cumulative cash distributions on the Series B Preferred Stock at a rate of 8.00% per annum of the $25.00 liquidation preference per share. The Series B Preferred Stock is not redeemable by the holders, has no maturity date and is not convertible into any other security of the Company or its affiliates. Preferred Units - The Company is the holder of the Operating Partnership’s preferred partnership units, and is entitled to receive distributions when authorized by the general partner of the Operating Partnership out of assets legally available for the payment of distributions. In October 2017, the Operating Partnership issued 1,300,000 units of 7.875% Series C Preferred Units, for net proceeds after all estimated expenses of approximately $30.5 million. The Operating Partnership used the net proceeds to redeem in full the Operating Partnership’s 7% Notes and for working capital. On August 23, 2016, the Operating Partnership issued 1,610,000 units, $0.01 par value per unit, of its 8% Series B Cumulative Redeemable Perpetual Preferred Units (the “Series B Preferred Units”) for net proceeds after all expenses of approximately $37.8 million. The Operating Partnership used the net proceeds to redeem in full the Operating Partnership’s 8.0% senior unsecured notes and for working capital. The Operating Partnership pays cumulative cash dividends on the preferred partnership units at a rate of 8.00% per annum of the $25.00 liquidation preference per unit for the Series B Preferred Units and pays cumulative cash dividends on the preferred partnership units at a rate of 7.825% per annum of the $25.00 liquidation preference per unit for the Series C Preferred Units. For each of the quarters ended March 31, 2018 and 2017, the Operating Partnership has declared and has paid $0.50 per preferred unit for the Series B Preferred Units, respectively, and for the quarters ended March 31, 2018 and 2017, the Operating Partnership has declared and has paid $0.4922 and $0, respectively, per preferred unit for the Series C Preferred Units.

7. Preferred Stock and Units

Preferred Stock - The Company is authorized to issue up to 11,000,000 shares of preferred stock. As of March 31, 2018 and December 31, 2017, there were 1,610,000 shares, respectively, of the Series B Cumulative Redeemable Perpetual Preferred Stock (the “Series B Preferred Stock”) issued and outstanding. As of March 31, 2018 and December 31, 2017, there were 1,300,000 shares, respectively, of the Series C Preferred Stock issued and outstanding.

In October 2017, the Company issued 1,300,000 shares of Series C Preferred Stock, for net proceeds after all estimated expenses of approximately $30.5 million. The Company contributed the net proceeds from the offering to its Operating Partnership for an equivalent number of Series C Preferred Units. Holders of the Company’s Series C Preferred Stock are entitled to receive distributions when authorized by the Company’s board of directors out of assets legally available for the payment of distributions. The Company pays cumulative cash distributions on the Series C Preferred Stock at a rate of 7.875% per annum of the $25.00 liquidation preference per share. The Series C Preferred Stock is not redeemable by the holders, has no maturity date and is not convertible into any other security of the Company or its affiliates.

On August 23, 2016, the Company issued 1,610,000 shares of its Series B Preferred Stock for net proceeds after all expenses of approximately $37.8 million, which it contributed to the Operating Partnership for an equivalent number of preferred partnership units. Holders of the Company’s Series B Preferred Stock are entitled to receive distributions when authorized by the Company’s board of directors out of assets legally available for the payment of distributions. The Company pays cumulative cash distributions on the Series B Preferred Stock at a rate of 8.00% per annum of the $25.00 liquidation preference per share. The Series B Preferred Stock is not redeemable by the holders, has no maturity date and is not convertible into any other security of the Company or its affiliates.

Preferred Units - The Company is the holder of the Operating Partnership’s preferred partnership units, and is entitled to receive distributions when authorized by the general partner of the Operating Partnership out of assets legally available for the payment of distributions.

In October 2017, the Operating Partnership issued 1,300,000 units of 7.875% Series C Preferred Units, for net proceeds after all estimated expenses of approximately $30.5 million. The Operating Partnership used the net proceeds to redeem in full the Operating Partnership’s 7% Notes and for working capital.

On August 23, 2016, the Operating Partnership issued 1,610,000 units, $0.01 par value per unit, of its 8% Series B Cumulative Redeemable Perpetual Preferred Units (the “Series B Preferred Units”) for net proceeds after all expenses of approximately $37.8 million. The Operating Partnership used the net proceeds to redeem in full the Operating Partnership’s 8.0% senior unsecured notes and for working capital.

The Operating Partnership pays cumulative cash dividends on the preferred partnership units at a rate of 8.00% per annum of the $25.00 liquidation preference per unit for the Series B Preferred Units and pays cumulative cash dividends on the preferred partnership units at a rate of 7.825% per annum of the $25.00 liquidation preference per unit for the Series C Preferred Units.

For each of the quarters ended March 31, 2018 and 2017, the Operating Partnership has declared and has paid $0.50 per preferred unit for the Series B Preferred Units, respectively, and for the quarters ended March 31, 2018 and 2017, the Operating Partnership has declared and has paid $0.4922 and $0, respectively, per preferred unit for the Series C Preferred Units.