Shareholders’ Equity	9 Months Ended
Sep. 30, 2018
Shareholders’ Equity [Abstract]
Shareholders’ Equity	(12) Stockholders’ Equity Common Stock At-the-Market (ATM) Offering Program In October 2017, the Company commenced an ATM offering program with respect to its common stock, which allows the Company to issue and sell up to 2.0 million shares of its common stock. During the nine months ended September 30, 2018, the Company issued 100,000 shares of common stock under the ATM offering program for net proceeds of $2.8 million. The Company paid commissions to the sales agent of $0.1 million in connection with the sales of common stock under this ATM offering program during the nine months ended September 30, 2018. The net proceeds were used for general corporate purposes. The Company has remaining capacity to issue up to approximately 1.0 million of additional shares of common stock under this ATM offering program. The Company did not issue any shares under this ATM offering program during the three months ended September 30, 2018. Series A Preferred Stock Underwritten Offering In March 2018, the Company completed an underwritten public offering of 1,600,000 shares of its 8.5% Series A Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Stock, par value $0.0001 per share and liquidation preference $25.00 per share (Series A Preferred Stock), resulting in net proceeds to the Company of approximately $38.3 million, after deducting the underwriting discount and other offering expenses. Dividends on the Series A Preferred Stock accrue daily and are cumulative from and including the date of original issuance and are payable quarterly in arrears on the 15th day of each April, July, October and January. Dividends accrue at the Fixed Dividend Rate (as defined in the certificate of designations for the Series A Preferred Stock (Series A Certificate of Designations)) at an annual rate of 8.5% of the $25.00 liquidation preference per annum from, and including, the date of original issuance to, but not including, April 15, 2023. On and after April 15, 2023, dividends on the Series A Preferred Stock shall accrue at an annual rate equal to the sum of (a) Three-Month LIBOR (as defined in the Series A Certificate of Designations) as calculated on each applicable date and (b) 5.82% of the $25.00 liquidation preference per share of Series A Preferred Stock. The Series A Preferred Stock ranks senior to the Company’s common stock with respect to dividend rights and rights upon the Company’s liquidation, dissolution or winding up. The Series A Preferred Stock becomes redeemable by the Company beginning April 25, 2023 for cash at a redemption price of $25.00 per share of Series A Preferred Stock, plus accrued but unpaid dividends thereon to, but not including, the date fixed for redemption. In addition, upon the occurrence of a Change of Control (as defined in the Series A Certificate of Designations), subject to certain restrictions, the Company may, at its option, upon not less than thirty (30) days’ nor more than sixty (60) days’ written notice, redeem the Series A Preferred Stock, in whole or in part, within one hundred twenty (120) days after the first date on which such Change of Control occurred, for cash at a redemption price of $25.00 per share, plus any accumulated and unpaid dividends thereon to, but not including, the date fixed for redemption. There is no mandatory redemption of the Series A Preferred Stock or redemption at the option of the holders. Holders of the Series A Preferred Stock generally have no voting rights except for limited voting rights if the Company fails to pay dividends on the Series A Preferred Stock for six or more quarterly periods (whether or not consecutive) or the Company fails to maintain the listing of the Series A Preferred Stock on a National Exchange (as defined in the Series A Certificate of Designations) for a period of 180 consecutive days. In April 2018, the Company sold an additional 170,900 shares of Series A Preferred Stock upon the partial exercise by the underwriters of their option to purchase additional Series A Preferred Stock, resulting in net proceeds to the Company of approximately $4.1 million, after deducting the underwriting discount of $0.1 million. Series A Preferred Stock ATM Offering Program In May 2018, the Company commenced an ATM offering program with respect to its Series A Preferred Stock, which allows the Company to issue and sell up to 2.2 million shares of its Series A Preferred Stock. During the nine months ended September 30, 2018, the Company issued 428,710 shares of Series A Preferred Stock under the ATM offering program for net proceeds of $10.5 million. The Company paid commissions to the sales agent of $0.2 million in connection with the sales of Series A Preferred Stock under this ATM offering program during the nine months ended September 30, 2018. The net proceeds were used for repayment of debt and general corporate purposes. The Company has remaining capacity to issue up to approximately 1.8 million of additional shares of Series A Preferred Stock under this ATM offering program. The Company did not issue any shares under this ATM offering program during the three months ended September 30, 2018. Series B Preferred Stock Underwritten Offering In August 2018, the Company completed an underwritten public offering of 1,700,000 shares of its 8.5% Series B Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Stock, par value $0.0001 per share and liquidation preference $25.00 per share (Series B Preferred Stock), resulting in net proceeds to the Company of approximately $41.2 million, after deducting the underwriting discount. The Company sold an additional 255,000 shares of Series B Preferred Stock upon the exercise by the underwriters of their option to purchase additional Series B Preferred Stock, resulting in net proceeds to the Company of approximately $6.2 million, after deducting the underwriting discount of $0.2 million. Dividends on the Series B Preferred Stock accrue daily and are cumulative from and including the date of original issuance and are payable quarterly in arrears on the 15th day of each January, April, July and October. Dividends accrue at the Fixed Dividend Rate (as defined in the Series B certificate of designations for the Series B Preferred Stock (Series B Certificate of Designations)) at an annual rate of 8.5% of the $25.00 liquidation preference per annum from, and including, the date of original issuance to, but not including, August 15, 2023. On and after August 15, 2023, dividends on the Series B Preferred Stock shall accrue at an annual rate equal to the sum of (a) Three-Month LIBOR (as defined in the Certificate of Designations) as calculated on each applicable date and (b) 5.69% of the $25.00 liquidation preference per share of Series B Preferred Stock. The Series B Preferred Stock ranks senior to the Company’s common stock with respect to dividend rights and rights upon the Company’s liquidation, dissolution or winding up. The Series B Preferred Stock becomes redeemable by the Company beginning August 15, 2023 for cash at a redemption price of $25.00 per share of Series B Preferred Stock, plus accrued but unpaid dividends thereon to, but not including, the date fixed for redemption. In addition, upon the occurrence of a Change of Control (as defined in the Series B Certificate of Designations), subject to certain restrictions, the Company may, at its option, upon not less than thirty (30) days’ nor more than sixty (60) days’ written notice, redeem the Series B Preferred Stock, in whole or in part, within one hundred twenty (120) days after the first date on which such Change of Control occurred, for cash at a redemption price of $25.00 per share, plus any accumulated and unpaid dividends thereon to, but not including, the date fixed for redemption. There is no mandatory redemption of the Series B Preferred Stock or redemption at the option of the holders. Holders of the Series B Preferred Stock generally have no voting rights except for limited voting rights if the Company fails to pay dividends on the Series B Preferred Stock for six or more quarterly periods (whether or not consecutive) or the Company fails to maintain the listing of the Series B Preferred Stock on a National Exchange (as defined in the Series B Certificate of Designations) for a period of 180 consecutive days.

(12) Stockholders’ Equity

Common Stock At-the-Market (ATM) Offering Program

In October 2017, the Company commenced an ATM offering program with respect to its common stock, which allows the Company to issue and sell up to 2.0 million shares of its common stock. During the nine months ended September 30, 2018, the Company issued 100,000 shares of common stock under the ATM offering program for net proceeds of $2.8 million. The Company paid commissions to the sales agent of $0.1 million in connection with the sales of common stock under this ATM offering program during the nine months ended September 30, 2018. The net proceeds were used for general corporate purposes. The Company has remaining capacity to issue up to approximately 1.0 million of additional shares of common stock under this ATM offering program. The Company did not issue any shares under this ATM offering program during the three months ended September 30, 2018.

Series A Preferred Stock Underwritten Offering

In March 2018, the Company completed an underwritten public offering of 1,600,000 shares of its 8.5% Series A Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Stock, par value $0.0001 per share and liquidation preference $25.00 per share (Series A Preferred Stock), resulting in net proceeds to the Company of approximately $38.3 million, after deducting the underwriting discount and other offering expenses. Dividends on the Series A Preferred Stock accrue daily and are cumulative from and including the date of original issuance and are payable quarterly in arrears on the 15th day of each April, July, October and January. Dividends accrue at the Fixed Dividend Rate (as defined in the certificate of designations for the Series A Preferred Stock (Series A Certificate of Designations)) at an annual rate of 8.5% of the $25.00 liquidation preference per annum from, and including, the date of original issuance to, but not including, April 15, 2023. On and after April 15, 2023, dividends on the Series A Preferred Stock shall accrue at an annual rate equal to the sum of (a) Three-Month LIBOR (as defined in the Series A Certificate of Designations) as calculated on each applicable date and (b) 5.82% of the $25.00 liquidation preference per share of Series A Preferred Stock. The Series A Preferred Stock ranks senior to the Company’s common stock with respect to dividend rights and rights upon the Company’s liquidation, dissolution or winding up.

The Series A Preferred Stock becomes redeemable by the Company beginning April 25, 2023 for cash at a redemption price of $25.00 per share of Series A Preferred Stock, plus accrued but unpaid dividends thereon to, but not including, the date fixed for redemption. In addition, upon the occurrence of a Change of Control (as defined in the Series A Certificate of Designations), subject to certain restrictions, the Company may, at its option, upon not less than thirty (30) days’ nor more than sixty (60) days’ written notice, redeem the Series A Preferred Stock, in whole or in part, within one hundred twenty (120) days after the first date on which such Change of Control occurred, for cash at a redemption price of $25.00 per share, plus any accumulated and unpaid dividends thereon to, but not including, the date fixed for redemption. There is no mandatory redemption of the Series A Preferred Stock or redemption at the option of the holders. Holders of the Series A Preferred Stock generally have no voting rights except for limited voting rights if the Company fails to pay dividends on the Series A Preferred Stock for six or more quarterly periods (whether or not consecutive) or the Company fails to maintain the listing of the Series A Preferred Stock on a National Exchange (as defined in the Series A Certificate of Designations) for a period of 180 consecutive days.

In April 2018, the Company sold an additional 170,900 shares of Series A Preferred Stock upon the partial exercise by the underwriters of their option to purchase additional Series A Preferred Stock, resulting in net proceeds to the Company of approximately $4.1 million, after deducting the underwriting discount of $0.1 million.

Series A Preferred Stock ATM Offering Program

In May 2018, the Company commenced an ATM offering program with respect to its Series A Preferred Stock, which allows the Company to issue and sell up to 2.2 million shares of its Series A Preferred Stock. During the nine months ended September 30, 2018, the Company issued 428,710 shares of Series A Preferred Stock under the ATM offering program for net proceeds of $10.5 million. The Company paid commissions to the sales agent of $0.2 million in connection with the sales of Series A Preferred Stock under this ATM offering program during the nine months ended September 30, 2018. The net proceeds were used for repayment of debt and general corporate purposes. The Company has remaining capacity to issue up to approximately 1.8 million of additional shares of Series A Preferred Stock under this ATM offering program. The Company did not issue any shares under this ATM offering program during the three months ended September 30, 2018.

Series B Preferred Stock Underwritten Offering

In August 2018, the Company completed an underwritten public offering of 1,700,000 shares of its 8.5% Series B Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Stock, par value $0.0001 per share and liquidation preference $25.00 per share (Series B Preferred Stock), resulting in net proceeds to the Company of approximately $41.2 million, after deducting the underwriting discount. The Company sold an additional 255,000 shares of Series B Preferred Stock upon the exercise by the underwriters of their option to purchase additional Series B Preferred Stock, resulting in net proceeds to the Company of approximately $6.2 million, after deducting the underwriting discount of $0.2 million.

Dividends on the Series B Preferred Stock accrue daily and are cumulative from and including the date of original issuance and are payable quarterly in arrears on the 15th day of each January, April, July and October. Dividends accrue at the Fixed Dividend Rate (as defined in the Series B certificate of designations for the Series B Preferred Stock (Series B Certificate of Designations)) at an annual rate of 8.5% of the $25.00 liquidation preference per annum from, and including, the date of original issuance to, but not including, August 15, 2023. On and after August 15, 2023, dividends on the Series B Preferred Stock shall accrue at an annual rate equal to the sum of (a) Three-Month LIBOR (as defined in the Certificate of Designations) as calculated on each applicable date and (b) 5.69% of the $25.00 liquidation preference per share of Series B Preferred Stock. The Series B Preferred Stock ranks senior to the Company’s common stock with respect to dividend rights and rights upon the Company’s liquidation, dissolution or winding up.

The Series B Preferred Stock becomes redeemable by the Company beginning August 15, 2023 for cash at a redemption price of $25.00 per share of Series B Preferred Stock, plus accrued but unpaid dividends thereon to, but not including, the date fixed for redemption. In addition, upon the occurrence of a Change of Control (as defined in the Series B Certificate of Designations), subject to certain restrictions, the Company may, at its option, upon not less than thirty (30) days’ nor more than sixty (60) days’ written notice, redeem the Series B Preferred Stock, in whole or in part, within one hundred twenty (120) days after the first date on which such Change of Control occurred, for cash at a redemption price of $25.00 per share, plus any accumulated and unpaid dividends thereon to, but not including, the date fixed for redemption. There is no mandatory redemption of the Series B Preferred Stock or redemption at the option of the holders. Holders of the Series B Preferred Stock generally have no voting rights except for limited voting rights if the Company fails to pay dividends on the Series B Preferred Stock for six or more quarterly periods (whether or not consecutive) or the Company fails to maintain the listing of the Series B Preferred Stock on a National Exchange (as defined in the Series B Certificate of Designations) for a period of 180 consecutive days.