Consolidated Statement of Changes in Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended			9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Jun. 30, 2019	Sep. 30, 2021	Sep. 30, 2020
Statement of Stockholders' Equity [Abstract]
Stock repurchased and retired (in shares)	574	1,445,300		128,038	2,539,041
Common shares issued (in shares)				19,081	19,491
Non-vested common shares issued (in shares)		924	1,782	241,307	329,024
Non-vested common shares forfeited (in shares)	12,620	4,735		39,993	30,323
stock options exercised (in shares)		5,143	2,324	42,987	89,411
Shares tendered (in shares)		0	0	6,177	26,124
Common dividends (in dollars per share)	$ 0.41	$ 0.34		$ 1.23	$ 1.62