CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended					6 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2020	Jun. 30, 2019
Statement of Stockholders' Equity [Abstract]
Common stock dividends declared (in dollars per share)	$ 0.78	$ 0.78	$ 0.70	$ 0.70	$ 0.70	$ 0.78	$ 1.40