Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2018

Equity [Abstract]

Schedule of Common Stock Outstanding Roll Forward

	Common Stock
	Treasury	Outstanding
Share Activity	(Number of Shares)
Balance at end of 2016	803,154	10,312,625
Issued for stock-based compensation plans	(27,951)	27,951
Balance at end of 2017	775,203	10,340,576
Issued for stock-based compensation plans	(25,431)	25,431
Balance at end of 2018	749,772	10,366,007