Equity and Earnings per Common Share, Common Stock and Preferred Stock ATM Program and Share Repurchase Program (Details) - USD ($)			1 Months Ended		3 Months Ended				6 Months Ended	12 Months Ended
	Apr. 28, 2020	Jun. 04, 2018	Aug. 31, 2018	Apr. 30, 2018	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Dec. 31, 2020
Class of Stock Disclosures [Abstract]
Issuance of common stock (in shares)	527,010	2,750,000
Series A Preferred Stock [Member] | Preferred Stock ATM Program [Member]
Class of Stock Disclosures [Abstract]
Issuance of common stock (in shares)					0				0	0
Preferred stock value authorized				$ 35,000,000.0
Common Stock [Member]
Class of Stock Disclosures [Abstract]
Issuance of common stock (in shares)					20,214	16,378	549,234	9,500
Share Repurchase Program [Abstract]
Share repurchase program, authorized amount					$ 10,000,000.0				$ 10,000,000.0
Number of shares repurchased (in shares)					0			142,531	0	142,531
Weighted average price paid per share (in dollars per share)										$ 12.96
Brokers commission paid										$ 4,300
Common Stock [Member] | Common Stock ATM Program [Member]
Class of Stock Disclosures [Abstract]
Common stock value authorized			$ 50,000,000.0
Issuance of common stock (in shares)					0				0	0