Retirement Plans and Employee Stock Purchase Plans (Tables)

12 Months Ended

Dec. 31, 2020

Retirement Plans and Employee Stock Purchase Plans

Schedule of purchases made under the 2009 Employee Stock Purchase Plans

	Year ended December 31,
	2020		2019		2018
Number of shares purchased		65,512		65,148		60,950
Average price of shares purchased	$	42.45	$	48.58	$	49.85