Quarterly Financial Information (Tables)

12 Months Ended

Dec. 31, 2019

Quarterly Financial Information Disclosure [Abstract]

Summary of Quarterly Financial Information

(in thousands, except per share amounts)

	Quarter Ended
	March 31			June 30		September 30		December 31
Year ended December 31, 2019
Revenues	$	218,215		$	230,982	$	247,962	$	245,152
Cost of revenues		189,868			175,863		177,198		191,129
Gross margin		28,347			55,119		70,764		54,023
Net (loss) income		(2,300	)		13,907		24,971		11,714
Basic (loss) income per common share		(0.31	)		1.88		3.34		1.57
Diluted (loss) income per common share		(0.31	)		1.81		3.24		1.51
Year ended December 31, 2018
Revenues	$	223,975		$	231,603	$	247,287	$	237,832
Cost of revenues		207,713			183,123		187,602		175,588
Gross margin		16,262			48,480		59,685		62,244
Net (loss) income		(9,123	)		11,240		19,087		16,856
Basic (loss) income per common share		(1.25	)		1.54		2.59		2.28
Diluted (loss) income per common share		(1.25	)		1.46		2.50		2.21