Stockholders' Equity - Rollforward of Common Stock (Details) - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Increase (Decrease) in Stockholders' Equity
Beginning (shares)	10,366,007
Ending (shares)	10,422,091	10,366,007
Treasury
Increase (Decrease) in Stockholders' Equity
Beginning (shares)	749,772	775,203
Issued for stock-based compensation plans (shares)	(56,084)	(25,431)
Ending (shares)	693,688	749,772
Common Stock
Increase (Decrease) in Stockholders' Equity
Beginning (shares)	10,366,007	10,340,576
Issued for stock-based compensation plans (shares)	56,084	25,431
Ending (shares)	10,422,091	10,366,007