Retirement Plans and Employee Stock Purchase Plans (Tables)

12 Months Ended

Dec. 31, 2019

Retirement Plans and Employee Stock Purchase Plans

Schedule of purchases made under the 2009 Employee Stock Purchase Plans

	Year ended December 31,
	2019		2018		2017
Number of shares purchased		65,148		60,950		88,362
Average price of shares purchased	$	48.58	$	49.85	$	33.96