Unaudited Quarterly Data (Tables)

12 Months Ended

Dec. 31, 2015

Quarterly Financial Data [Abstract]

Unaudited Quarterly Data

Summarized quarterly financial data for the years ended December 31, 2015, and 2014 is as follows:

	1st Quarter		2nd Quarter		3rd Quarter			4th Quarter
	(In thousands, except per share data)
Year Ended December 31, 2015
Revenues	$	877,639	$	815,343	$	791,605		$	793,833
Gross profit	564,593		538,529		488,612			526,375
Operating profit	56,598		49,701		6,565			(1,120,752		)
Net earnings (loss)	27,298		23,147		(4,092		)	(912,981		)
Basic earnings (loss) per common share	$	0.51	$	0.44	$	(0.08	)	$	(17.20	)
Diluted earnings (loss) per common share	$	0.51	$	0.43	$	(0.08	)	$	(17.20	)
Cash dividends declared per common share	$	0.24	$	0.24	$	0.24		$	0.24

	1st Quarter		2nd Quarter		3rd Quarter		4th Quarter
	(In thousands, except per share data)
Year Ended December 31, 2014
Revenues	$	828,473	$	768,426	$	764,363	$	796,534
Gross profit	562,550		537,024		539,758		545,031
Operating profit	59,458		40,390		45,920		47,694
Net earnings	27,266		17,681		25,925		25,550
Basic earnings per common share	$	0.52	$	0.33	$	0.49	$	0.48
Diluted earnings per common share	$	0.51	$	0.33	$	0.49	$	0.48
Cash dividends declared per common share	$	0.23	$	0.23	$	0.23	$	0.24