CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
CURRENT ASSETS:
Cash and cash equivalents	$ 9,400	$ 14,932	$ 8,643	$ 9,131	$ 10,598	$ 9,333	$ 2,368	$ 8,246	$ 8,218	$ 5,318
Accounts receivable, net of allowance for doubtful accounts of $542 and $419, respectively	35,501	30,923	38,409	35,973	37,785	30,394	39,959	31,948
Inventory, net	40,101	42,126	45,887	43,052	41,191	41,384	45,190	46,491
Prepaid expenses and other	6,123	6,783	7,120	6,044	4,277	3,888	5,415	5,867
Current deferred tax assets	3,971	5,599	2,548	2,440	3,456	2,515	1,946	1,589
Assets held for sale	0	6,011	6,155	6,276	6,299	6,610	6,206	5,402
Total current assets	95,096	106,374	108,762	102,916	103,606	94,124	101,084	99,543
PROPERTY, PLANT AND EQUIPMENT	109,733	100,305	102,564	100,208	98,573	95,717	90,651	85,896
Less - accumulated depreciation	(45,898)	(42,423)	(42,018)	(40,732)	(38,358)	(36,469)	(35,010)	(33,661)
Property, plant and equipment, net	63,835	57,882	60,546	59,476	60,215	59,248	55,641	52,235
GOODWILL, net	32,762	34,382	37,161	37,689	37,970	37,553	36,447	36,125	37,431
PURCHASED INTANGIBLE ASSETS, net	26,734	29,403	32,939	34,597	36,458	37,646	38,121	39,428
DEFERRED TAX ASSETS	587	430	516	596	403	158	319	922
OTHER ASSETS, net	315	1,236	1,868	1,711	1,893	499	505	529
TOTAL ASSETS	219,329	229,707	241,792	236,985	240,545	229,228	232,117	228,782
CURRENT LIABILITIES:
Accounts payable	14,076	9,104	9,689	13,438	14,567	9,020	14,111	10,362
Accrued expenses	5,638	3,245	3,671	4,315	3,927	4,222	4,657	4,453
Dividend payable	559	559	559	557	550	550	549	547
Accrued income taxes	3,770	2,972	2,317	1,932	2,657	1,237	911	300
Accrued employee compensation and benefits	4,582	4,667	4,119	3,140	4,552	5,346	4,338	3,778
Customer advances	3,510	2,364	2,617	2,996	1,019	1,387	4,758	1,378
Current debt obligations	0	4	20	516	2,907	65	63	64
Current deferred tax liabilities	373	435	417	404	435	274	155	155
Liabilities related to assets held for sale	0	721	742	758	826	765	820	543
Total current liabilities	32,508	24,076	24,156	28,066	31,440	22,899	30,407	21,630
LINES OF CREDIT	22,782	26,000	31,800	26,900	26,400	25,550	28,843	38,256
DEFERRED TAX LIABILITIES	7,003	9,507	7,740	7,724	7,795	7,842	7,404	7,323
OTHER LONG-TERM LIABILITIES	2,121	1,988	2,058	2,018	1,881	1,755	1,668	1,582
Total liabilities	64,414	61,575	65,760	64,715	67,516	58,051	68,342	68,834
COMMITMENTS AND CONTINGENT LIABILITIES (See Note 9)
STOCKHOLDERS’ EQUITY:
Preferred stock, $0.05 par value; 4,000,000 shares authorized; no issued and outstanding shares	0	0	0	0	0	0	0	0
Common stock, $0.05 par value; 25,000,000 shares authorized; 13,997,076 and 13,772,324 shares issued and outstanding, respectively	700	699	699	698	689	688	688	684
Additional paid-in capital	67,088	65,914	64,950	63,690	62,934	62,099	61,530	60,682
Retained earnings	113,723	117,857	116,077	114,320	113,390	113,837	111,204	108,688
Other cumulative comprehensive loss	(26,596)	(16,338)	(5,694)	(6,438)	(3,984)	(5,627)	(9,772)	(10,215)
Total stockholders’ equity	154,915	168,132	176,032	172,270	173,029	170,997	163,650	159,839
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 219,329	$ 229,707	$ 241,792	$ 236,985	$ 240,545	$ 229,228	$ 232,117	$ 228,782