CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Stockholders' Equity [Abstract]
Dividends paid per share to common shareholders (in dollars per share)	$ 0.36	$ 0.48	$ 0.48
Repurchase of common stock, number of shares (in shares)	1,565,060	678,165	1,642,635
Shares of common stock issued (in shares)	304,845	278,060	142,817
Shares of incentive common stock issued (in shares)	371,081	56,767	40,475
Shares of incentive common stock canceled or forfeited (in shares)		10,026	154,905
Shares of incentive common stock withheld for employee taxes (in shares)	50,758	119,590	161,967