CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
CONSOLIDATED STATEMENTS OF OPERATIONS [Abstract]
Net sales	$ 971,975	$ 980,392	$ 983,704
Cost of sales	690,987	690,762	693,250
Gross profit	280,988	289,630	290,454
Selling, general and administrative expenses	206,287	193,525	201,256
Litigation charge	0	10,650	0
Restructuring and integration (income) expenses	(134)	1,197	3,357
Other income, net	1,025	1,080	1,022
Operating income	75,860	85,338	86,863
Other non-operating income (expense), net	(220)	(1,969)	1
Interest expense	1,537	1,616	1,902
Earnings from continuing operations before taxes	74,103	81,753	84,962
Provision for income taxes	25,983	28,854	31,919
Earnings from continuing operations	48,120	52,899	53,043
Loss from discontinued operations, net of income tax benefit of $1,401, $6,580 and $1,062	(2,102)	(9,870)	(1,593)
Net earnings	$ 46,018	$ 43,029	$ 51,450
Net earnings per common share - Basic:
Earnings from continuing operations (in dollars per share)	$ 2.11	$ 2.31	$ 2.31
Discontinued operations (in dollars per share)	(0.09)	(0.43)	(0.07)
Net earnings per common share - Basic (in dollars per share)	2.02	1.88	2.24
Net earnings per common share - Diluted:
Earnings from continuing operations (in dollars per share)	2.08	2.28	2.28
Discontinued operations (in dollars per share)	(0.09)	(0.43)	(0.07)
Net earnings per common share - Diluted (in dollars per share)	1.99	1.85	2.21
Dividends declared per share (in dollars per share)	$ 0.60	$ 0.52	$ 0.44
Average number of common shares (in shares)	22,811,862	22,899,516	22,974,690
Average number of common shares and dilutive common shares (in shares)	23,142,394	23,239,925	23,270,067