Stock Based Compensation (Tables)

6 Months Ended

Jun. 30, 2019

Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]

Summary of Stock Option Activity

A summary of stock options expired under our stock incentive plans and stock options outstanding as of, and changes made during, the six months ended June 30, 2019, is presented below:

	Outstanding				Exercisable
	Number of Shares Underlying Options		Weighted Average Exercise Price		Number of Shares Underlying Options	Weighted Average Exercise Price
Options outstanding, December 31, 2018	118,003		$	19.90	118,003	$	19.90
Expired	(252	)	16.28
Options outstanding, June 30, 2019	117,751		$	19.91	117,751	$	19.91