CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
CURRENT ASSETS:
Cash and cash equivalents	$ 9,017	$ 9,719
Trade receivables — net of allowance for uncollectible accounts — 2013 — $985 and 2012 — $892	54,624	53,402
Employee receivables	183	169
Other receivables	2,561	2,672
Inventories	82,450	84,599
Prepaid expenses	5,344	4,133
Prepaid income taxes	1,233	1,250
Deferred income tax assets	4,974	4,976
Income tax refund receivable	1,752	1,076
Total current assets	162,138	161,996
PROPERTY AND EQUIPMENT:
Land and land improvements	17,980	17,346
Buildings	122,704	81,223
Manufacturing equipment	122,965	117,601
Furniture and fixtures	30,484	26,307
Leasehold improvements	13,385	13,236
Construction-in-progress	35,658	74,643
Total property and equipment	343,176	330,356
Less accumulated depreciation	(99,646)	(95,553)
Property and equipment — net	243,530	234,803
OTHER ASSETS:
Goodwill	175,108	175,108
Deferred income tax assets	4,237	4,237
Other assets	11,211	11,034
Total other assets	306,471	308,510
TOTAL	712,139	705,309
CURRENT LIABILITIES:
Trade payables	25,296	34,637
Accrued expenses	24,799	27,269
Current portion of long-term debt	10,000	10,000
Advances from employees	627	551
Income taxes payable	507	547
Total current liabilities	61,229	73,004
LONG-TERM DEBT	244,254	227,566
DEFERRED INCOME TAX LIABILITIES	2,305	2,373
LIABILITIES RELATED TO UNRECOGNIZED TAX BENEFITS	2,938	2,938
DEFERRED COMPENSATION PAYABLE	6,237	5,956
DEFERRED CREDITS	3,022	2,980
OTHER LONG-TERM OBLIGATIONS	8,822	8,915
Total liabilities	328,807	323,732
STOCKHOLDERS’ EQUITY:
Preferred stock — 5,000 shares authorized as of March 31, 2013 and December 31, 2012; no shares issued	0	0
Common stock — no par value; 100,000 shares authorized; 42,550 and 42,489 shares issued at March 31, 2013 and December 31, 2012, respectively	173,424	172,341
Retained earnings	211,089	210,418
Accumulated other comprehensive loss	(1,181)	(1,182)
Total stockholders’ equity	383,332	381,577
TOTAL	712,139	705,309
Developed Technology Rights [Member]
OTHER ASSETS:
Intangible Assets	85,968	87,332
Other Intangible Assets [Member]
OTHER ASSETS:
Intangible Assets	$ 29,947	$ 30,799