Condensed Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Stockholders' Equity [Abstract]
Cash dividends declared per common share	$ 0.25	$ 0.23	$ 0.73	$ 0.69
Common stock issued per share for stock bonus (in USD per share)	$ 0	$ 99.63	$ 93.45	$ 81.30