Stockholders' Equity - Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Equity [Abstract]
Net (Loss) Income	$ 4,178	$ 7,180	$ (32,913)	$ 23,312
Weighted average number of common shares outstanding (in shares)	30,986	30,581	30,894	30,547
Dilutive effect of restricted stock grants after application of the treasury stock method (in shares)	631	271	0	282
Dilutive shares outstanding (in shares)	31,617	30,852	30,894	30,829
Basic (loss) earnings per share (in dollars per share)	$ 0.13	$ 0.23	$ (1.07)	$ 0.76
Diluted (loss) earnings per share (in dollars per share)	$ 0.13	$ 0.23	$ (1.07)	$ 0.76