Earnings Per Share - Calculations of Net Income Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share Reconciliation [Abstract]
Net (loss) Income	$ (19,214)	$ 181,313
Basic weighted average common shares outstanding	54,863	54,863
Add: Incremental shares for:
Diluted effects of stock options		559
Diluted weighted average common shares outstanding	54,863	55,422
Net (loss) income per common share
Basic	$ (0.35)	$ 3.30
Diluted	$ (0.35)	$ 3.27