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Stockholders' Equity - Additional Information (Details) - USD ($)		12 Months Ended
	Dec. 12, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Nov. 01, 2019
Class Of Stock [Line Items]
Dividends declared and paid		$ 783,000	$ 783,000	$ 11,277,000
Aggregate number of shares authorized to repurchase						1,250,000
Approximate percentage of shares authorized to be repurchased		3.30%
Cash dividend declared	$ 0.03
Dividend payable date	Jan. 07, 2020
Dividends record date	Dec. 24, 2019
Series B Preferred Stock
Class Of Stock [Line Items]
Preferred stock, dividend rate, percentage					7.50%
Preferred stock, liquidation preference per share					$ 1,000
Preferred stock fixed dividend close date					Dec. 30, 2021
Preferred stock redemption price per share					$ 1,000
Dividends declared and paid		$ 783,000	$ 783,000
Series B Preferred Stock | Three-month LIBOR
Class Of Stock [Line Items]
Preferred stock, dividend rate, percentage					5.41%

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