Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	90,000,000	90,000,000
Common stock, shares issued (in shares)	43,034,000	42,686,000
Common stock, shares outstanding (in shares)	43,034,000	42,686,000
Series D Preferred Stock
Preferred stock, par value (in dollars per share)	$ 0.01
Preferred stock, shares authorized (in shares)	65,000
Preferred stock, shares issued (in shares)	65,000
Preferred stock, shares outstanding (in shares)	65,000
Perpetual and convertible preferred stock	$ 51,383	$ 0
Series B Preferred Stock
Preferred stock, par value (in dollars per share)		$ 0.01
Preferred stock, shares authorized (in shares)		100,000
Preferred stock, shares issued (in shares)		100,000
Preferred stock, shares outstanding (in shares)		100,000
Perpetual and convertible preferred stock	$ 0	$ 105,086