Earnings (Loss) Per Common Share (Tables)

6 Months Ended

Jun. 30, 2017

Earnings Per Share [Abstract]

Schedule of Earnings (Loss) Per Share Basic and Diluted

	Three Months Ended June 30,					Six Months Ended June 30,
	2017			2016		2017		2016
Numerator — basic and diluted
Net income (loss)	$	(5,156	)	$	26,547	$	8,860	$	56,728
Denominator
Weighted average number of common shares    outstanding — basic		39,555			40,820		40,039		40,663
Effect of dilutive stock options		—			316		129		223
Effect of dilutive restricted shares		—			463		334		487
Weighted average number of common shares    outstanding — diluted		39,555			41,599		40,502		41,373
Earnings (loss) per common share — basic	$	(0.13	)	$	0.65	$	0.22	$	1.40
Earnings (loss) per common share — diluted	$	(0.13	)	$	0.64	$	0.22	$	1.37
Antidilutive stock options and restricted shares		1,947			1,374		1,469		2,016