CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net sales	$ 547,939	$ 562,255	$ 541,472
Cost of products sold (excluding depreciation)	366,962	392,382	364,384
Depreciation and amortization	28,938	26,320	24,337
Selling, general and administrative expenses	76,958	85,345	87,926
Research and development expenses	6,037	8,025	7,930
Restructuring (Note 2)	(129)	10,211
Litigation and other contingencies (Note 17)	284	111	(337)
Total costs and expenses	479,050	522,394	484,240
Income from operations	68,889	39,861	57,232
Interest income	136	35	467
Interest expense	(462)	(80)
Other expense - net	(1,364)	(2,480)	(1,309)
Income before income tax provision	67,199	37,336	56,390
Income tax provision (Note 13)	21,486	14,064	17,166
Net income	45,713	23,272	39,224
Other comprehensive income (loss), net of tax (Note 14)
Foreign currency translation	(305)	1,197	(1,123)
Derivatives	424	854	756
Employee benefit plans	15,268	(5,061)	(9,076)
Total other comprehensive income (loss)	15,387	(3,010)	(9,443)
Total comprehensive income	$ 61,100	$ 20,262	$ 29,781
Basic net income per common share (in dollars per share)	$ 0.85	$ 0.41	$ 0.70
Diluted net income per common share (in dollars per share)	$ 0.84	$ 0.41	$ 0.69
Weighted average shares outstanding
Basic (in shares)	53,897,834	56,304,636	56,243,015
Diluted (in shares)	54,671,029	56,835,560	56,993,948