Subsequent Events (Details) - Common Stock - shares		12 Months Ended			224 Months Ended
	Jan. 27, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019	Apr. 26, 2001
2001 Purchase Plan
Subsequent Event [Line Items]
Common stock, authorized shares repurchase (in shares)						911,631
Common stock, shares repurchased (in shares)		0	0	0	502,447
Subsequent Event | 2020 Purchase Plan
Subsequent Event [Line Items]
Common stock, authorized shares repurchase (in shares)	1,000,000
Common stock, percentage of Company's outstanding shares authorized for repurchase	4.00%
Common stock, shares repurchased (in shares)	0
Subsequent Event | 2001 Purchase Plan
Subsequent Event [Line Items]
Common stock, authorized shares repurchase (in shares)	409,184