Segment Information (Schedule Of Segment Reporting Information) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2014		Mar. 31, 2013
Segment Reporting Information [Line Items]
Net sales	$ 203,754		$ 210,834
Operating income (loss)	14,505		17,882
Depreciation and amortization	7,354	[1]	7,496	[1]
Intersegment [Member]
Segment Reporting Information [Line Items]
Net sales	(4,258)	[2]	(4,590)	[2]
Operating income (loss)	(660)	[2]	(710)	[2]
Significant Reconciling Items [Member]
Segment Reporting Information [Line Items]
Operating income (loss)	(1,765)		(2,064)
Depreciation and amortization	49	[1]	19	[1]
Carbonless Papers [Member]
Segment Reporting Information [Line Items]
Net sales	88,008		89,740
Operating income (loss)	9,242		10,794
Depreciation and amortization	3,411	[1]	3,655	[1]
Thermal Papers [Member]
Segment Reporting Information [Line Items]
Net sales	105,464		112,566
Operating income (loss)	3,718		6,426
Depreciation and amortization	3,213	[1]	3,355	[1]
Net Paper Segments [Member]
Segment Reporting Information [Line Items]
Net sales	193,472		202,306
Operating income (loss)	12,960		17,220
Depreciation and amortization	6,624	[1]	7,010	[1]
Encapsys [Member]
Segment Reporting Information [Line Items]
Net sales	14,540		13,118
Operating income (loss)	3,970		3,436
Depreciation and amortization	$ 681	[1]	$ 467	[1]

[1] Depreciation and amortization are allocated to the reportable segments based on the amount of activity provided by departments to the respective product lines in each reportable segment.

[2] Intersegment represents the portion of the Encapsys segment financial results relating to microencapsulated products provided internally for the production of carbonless papers.