Unaudited Quarterly Data Unaudited Quarterly Data (Tables)

12 Months Ended

Dec. 31, 2018

Unaudited Quarterly Data [Abstract]

Unaudited Quarterly Data [Table Text Block]

Summarized quarterly financial data for the years ended December 31, 2018, and 2017 is as follows:

(In thousands, except per share data)	1st Quarter			2nd Quarter		3rd Quarter		4th Quarter
Year Ended December 31, 2018
Revenues	$	698,043		$	655,730	$	644,942	$	661,750
Gross profit	436,978			423,886		407,740		419,564
Operating profit (loss)	(10,270		)	27,151		25,632		13,624
Net (loss) earnings	(19,843		)	13,753		12,918		1,664
Basic (loss) earnings per common share	$	(0.37	)	$	0.26	$	0.24	$	0.03
Diluted (loss) earnings per common share	$	(0.37	)	$	0.25	$	0.24	$	0.03

(In thousands, except per share data)	1st Quarter			2nd Quarter			3rd Quarter			4th Quarter
Year Ended December 31, 2017
Revenues	$	741,986		$	677,635		$	643,965		$	638,954
Gross profit	462,663			432,533			412,465			410,881
Operating profit (loss)	1,152			(873		)	(8,445		)	(54,893		)
Net earnings (loss)	(6,679		)	(8,893		)	(12,599		)	34,824
Basic earnings (loss) per common share	$	(0.13	)	$	(0.17	)	$	(0.24	)	$	0.65
Diluted earnings (loss) per common share	$	(0.13	)	$	(0.17	)	$	(0.24	)	$	0.65
Cash dividends declared per common share	$	0.08		$	0.08		$	—		$	—