Consolidated Statement of Changes in Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Stockholders' Equity [Abstract]
Common shares purchased and retired (in shares)	1,445,300	4,200	2,539,041	43,560
Common shares issued (in shares)			19,491	4,356,498
Non-vested common shares issued (in shares)	924	662	329,024	211,826
Non-vested common shares forfeited (in shares)	4,735	14,502	30,323	35,919
stock options exercised (in shares)	5,143	18,983	89,411	117,669
Shares tendered (in shares)	0	5,425	26,124	40,533
Common dividends (in dollars per share)	$ 0.34	$ 0.31	$ 1.62	$ 0.93