Shareholders' Equity (Narrative) (Details)			6 Months Ended
	Jul. 15, 2021 $ / shares	Nov. 25, 2020	Jun. 30, 2021 shares	Dec. 31, 2020 shares
Class Of Stock [Line Items]
Preferred stock, shares authorized | shares			12,500,000
Subsequent Event [Member]
Class Of Stock [Line Items]
Dividends payable, date declared	Jul. 15, 2021
Common stock, dividends declared | $ / shares	$ 0.066
Dividends payable, date to be paid	Aug. 20, 2021
Dividends payable, date of record	Aug. 10, 2021
Series B [Member]
Class Of Stock [Line Items]
Preferred stock, shares authorized | shares			1,450,000	1,450,000
Series B [Member] | Subsequent Event [Member]
Class Of Stock [Line Items]
Preferred stock dividends declared | $ / shares	$ 0.453125
Series C [Member]
Class Of Stock [Line Items]
Preferred stock, shares authorized | shares			6,450,000	6,450,000
Series C [Member] | Subsequent Event [Member]
Class Of Stock [Line Items]
Preferred stock dividends declared | $ / shares	$ 0.406250
Common Stock [Member]
Class Of Stock [Line Items]
Stockholders' equity, reverse stock split, conversion ratio		0.15
Stockholders' equity, reverse stock split			Each 6.6 shares of the Company’s issued and outstanding common stock were combined into one share of the Company’s common stock.