Equity - Narrative (Details)	1 Months Ended		2 Months Ended	3 Months Ended						9 Months Ended		12 Months Ended
	Jun. 30, 2020 USD ($) $ / shares shares	Dec. 31, 2018 $ / shares shares	Sep. 30, 2020 USD ($) $ / shares shares	Sep. 30, 2020 USD ($) $ / shares shares	Jun. 30, 2020 USD ($) $ / shares	Mar. 31, 2020 USD ($) $ / shares shares	Sep. 30, 2019 shares	Jun. 30, 2019 shares	Mar. 31, 2019 shares	Sep. 30, 2020 USD ($) vote $ / shares shares	Sep. 30, 2019 USD ($)	Dec. 31, 2019 $ / shares shares	Nov. 06, 2020 USD ($)	Nov. 05, 2020 USD ($)
Class of Stock [Line Items]
Common stock, shares authorized (up to) (in shares) | shares			400,000,000	400,000,000						400,000,000		400,000,000
Common stock, par value (in dollars per share) | $ / shares			$ 0.01	$ 0.01						$ 0.01		$ 0.01
Votes per common share | vote										1
Shares sold (in shares) | shares				4,760,000
Net proceeds from shares sold				$ 114,500,000
Placement fees and expenses				4,529,000	$ 10,000
Value amount of shares authorized to be repurchased (up to)			$ 250,000,000	$ 250,000,000						$ 250,000,000
Shares repurchased (in shares) | shares						1,119,438
Repurchased shares, average price per share (in dollars per share) | $ / shares						$ 8.91
Common stock repurchased						$ 10,000,000.0				$ 10,000,000	$ 42,828,000
Preferred stock, shares authorized (up to) (in shares) | shares			10,000,000	10,000,000						10,000,000		10,000,000
Preferred stock, par value (in dollars per share) | $ / shares			$ 0.01	$ 0.01						$ 0.01		$ 0.01
Preferred stock, dividend rate			8.25%	8.25%						8.25%		8.25%
Liquidation preference per share (in dollars per share) | $ / shares			$ 25.00	$ 25.00						$ 25.00
Redemption price per share (in dollars per share) | $ / shares			$ 25.00	$ 25.00						$ 25.00
Limited partnership, price per unit (in dollars per unit) | $ / shares		$ 11.76
Option to redeem for common stock ratio		1
Common Stock
Class of Stock [Line Items]
Shares sold (in shares) | shares	135,481			0
Shares sold, price per share (in dollars per share) | $ / shares	$ 7.56				$ 7.56
Net proceeds from shares sold	$ 1,000,000.0
Placement fees and expenses	$ 10,000
Series A Preferred Stock
Class of Stock [Line Items]
Shares sold (in shares) | shares			4,760,000
Placement fees and expenses			$ 4,500,000
Gross proceeds from sale of stock			$ 119,000,000.0
Unaffiliated Third Parties
Class of Stock [Line Items]
Common units issued (in shares) | shares		796,684
Operating partnerships units held (in shares) | shares			855,191	855,191						855,191		792,131
Common Stock
Class of Stock [Line Items]
Aggregate offering price (up to)										$ 200,000,000
Shares repurchased (in shares) | shares						1,119,438	280,436	1,004,589	3,143,922
Subsequent Event
Class of Stock [Line Items]
Amount remaining under offering program													$ 199,000,000.0
Remaining repurchase amount														$ 165,200,000
Long-Term Incentive Plan Unit
Class of Stock [Line Items]
Units outstanding (in shares) | shares			243,809	243,809						243,809		244,366