Quarterly Results (Tables)

12 Months Ended

Dec. 31, 2016

Quarterly Financial Information Disclosure [Abstract]

Schedule of Net Income (Loss) and Earnings (Loss) Per Share

														Earnings (loss)
In thousands,	Net sales				Gross profit				Net income (loss)					per share
except per share	2016		2015		2016		2015		2016			2015		2016			2015
First	$	402,218	$	417,469	$	57,843	$	52,108	$	16,168		$	13,925	$	0.37		$	0.32
Second		406,413		410,803		42,723		32,833		1,965			2,848		0.04			0.06
Third		405,301		419,960		61,170		59,908		19,601			13,504		0.44			0.31
Fourth		390,865		412,852		56,867		58,116		(16,180	)		34,298		(0.37	)		0.78