Common Stock and Dividends - Dividend Declared and Paid (Details) - $ / shares	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Stockholders' Equity Note [Abstract]
Dividends declared (in dollars per share)	$ 0.14			$ 0.13			$ 0.42	$ 0.39
Dividends paid (in dollars per share)	$ 0.14	$ 0.14	$ 0.14	$ 0.13	$ 0.13	$ 0.13	$ 0.42	$ 0.39