CONSOLIDATED CONDENSED BALANCE SHEETS (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 29, 2012	Dec. 31, 2011	Sep. 24, 2011
CURRENT ASSETS:
Cash and cash equivalents	$ 4,908	$ 11,305	$ 18,649
Accounts receivable, net	191,178	127,316	170,030
Inventories:
Raw materials	119,346	111,526	106,769
Finished goods	89,792	83,171	74,113
Inventory, net	209,138	194,697	180,882
Assets held for sale	0	0	5,082
Refundable income taxes	1,266	3,482	1,779
Other current assets	25,898	21,394	23,649
TOTAL CURRENT ASSETS	432,388	358,194	400,071
OTHER ASSETS	14,918	15,380	11,470
GOODWILL	157,966	154,702	154,702
INDEFINITE-LIVED INTANGIBLE ASSETS	2,340	2,340	2,340
OTHER INTANGIBLE ASSETS, net	8,802	10,924	11,920
PROPERTY, PLANT AND EQUIPMENT:
Property, plant and equipment	541,473	537,208	531,431
Accumulated depreciation and amortization	(324,542)	(314,741)	(313,511)
PROPERTY, PLANT AND EQUIPMENT, NET	216,931	222,467	217,920
TOTAL ASSETS	833,345	764,007	798,423
CURRENT LIABILITIES:
Accounts payable	72,080	49,433	65,315
Accrued liabilities:
Compensation and benefits	39,743	30,920	39,269
Other	17,656	12,172	17,554
Current portion of long-term debt and capital lease obligations	40,000	40,270	266
TOTAL CURRENT LIABILITIES	169,479	132,795	122,404
LONG-TERM DEBT AND CAPITAL LEASE OBLIGATIONS, less current portion	15,918	12,200	52,200
DEFERRED INCOME TAXES	19,889	19,049	20,354
OTHER LIABILITIES	16,342	17,364	17,496
TOTAL LIABILITIES	221,628	181,408	212,454
Controlling interest shareholders' equity:
Preferred stock, no par value; shares authorized 1,000,000;issued and outstanding, none
Common stock, no par value; shares authorized 40,000,000;issued and outstanding 19,790,414, 19,623,803 and 19,556,008	19,790	19,624	19,556
Additional paid-in capital	148,581	143,988	141,849
Retained earnings	432,772	410,848	416,433
Accumulated other comprehensive earnings	4,554	3,600	3,844
Employee stock notes receivable	(1,013)	(1,255)	(1,439)
Controlling interest shareholders' equity	604,684	576,805	580,243
Noncontrolling interest	7,033	5,794	5,726
TOTAL EQUITY	611,717	582,599	585,969
TOTAL LIABILITIES AND EQUITY	$ 833,345	$ 764,007	$ 798,423