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Quarterly Financial Information (Tables)

12 Months Ended

Dec. 31, 2020

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, 2020
Revenues		$	219,104			$	201,031			$	227,513			$	233,176
Cost of revenues			193,053				154,388				168,279				182,197
Gross margin			26,051				46,643				59,234				50,979
Net (loss) income			(3,407	)			11,510				18,511				7,151
Basic (loss) income per common share			(0.45	)			1.52				2.42				0.94
Diluted (loss) income per common share			(0.45	)			1.51				2.40				0.93

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