Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2019

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Restricted Performance Stock Unit and Equity Incentive Activity

	Equity Incentive Awards
	Restricted Stock Units			Weighted Average Grant Date Fair Value		Performance Shares			Weighted Average Grant Date Fair Value		Options		Weighted Average Exercise Price
Balance at December 31, 2018		183,726		$	17.26		296,523		$	19.1		59,000	$	18.33
Granted		905,089			5.29		1,475,277			6.09		—		—
Settled		(83,937	)		16.52		(31,081	)		22.81		—		—
Forfeited or expired		(18,975	)		15.79		(53,396	)		18.02		—		—
Balance at June 30, 2019		985,903		$	6.36		1,687,323		$	7.68		59,000	$	18.33
Vested or expected to vest at June 30, 2019		843,451		$	6.45		1,349,429		$	6.77		59,000	$	18.33