Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Stock-based Compensation, Stock Options and Stock Appreciation Rights Award Activity

The following table summarizes the grants awarded during the six months ended June 30, 2018:

Grant date	Restricted stock	Grant date fair value of restricted stock		Stock options	Grant date fair value of stock options		Performance shares	Grant date fair value of performance shares
March 5, 2018	31,887	$	7.84	—	$	—	—	$	—
May 9, 2018	868,134	$	7.90	14,310	$	4.09	408,179	$	7.39

The following options and stock appreciation rights were exercisable during the six months ended June 30, 2018:

Award Type	Number of  Exercised Units	Weighted Average Exercised Price		Number of Exercisable Units	Weighted Average Exercisable Price
Stock options	159,069	$	3.35	334,838	$	14.72
Stock appreciation rights	—	$	—	42,152	$	14.14