CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
CURRENT ASSETS:
Cash and cash equivalents	$ 13,143	$ 9,719
Trade receivables — net of allowance for uncollectible accounts — 2013 — $1,035 and 2012 — $892	58,416	53,402
Employee receivables	192	169
Other receivables	2,493	2,672
Inventories	81,560	84,599
Prepaid expenses	4,761	4,133
Prepaid income taxes	1,242	1,250
Deferred income tax assets	4,982	4,976
Income tax refund receivable	511	1,076
Total current assets	167,300	161,996
PROPERTY AND EQUIPMENT:
Land and land improvements	17,979	17,346
Buildings	126,562	81,223
Manufacturing equipment	126,592	117,601
Furniture and fixtures	31,412	26,307
Leasehold improvements	14,098	13,236
Construction-in-progress	43,054	74,643
Total property and equipment	359,697	330,356
Less accumulated depreciation	(103,679)	(95,553)
Property and equipment — net	256,018	234,803
OTHER ASSETS:
Goodwill	175,108	175,108
Deferred income tax assets	4,237	4,237
Other assets	13,018	11,034
Total other assets	305,066	308,510
TOTAL	728,384	705,309
CURRENT LIABILITIES:
Trade payables	34,622	34,637
Accrued expenses	23,501	27,269
Current portion of long-term debt	10,000	10,000
Advances from employees	686	551
Income taxes payable	999	547
Total current liabilities	69,808	73,004
LONG-TERM DEBT	246,828	227,566
DEFERRED INCOME TAX LIABILITIES	2,338	2,373
LIABILITIES RELATED TO UNRECOGNIZED TAX BENEFITS	2,938	2,938
DEFERRED COMPENSATION PAYABLE	6,603	5,956
DEFERRED CREDITS	2,989	2,980
OTHER LONG-TERM OBLIGATIONS	7,331	8,915
Total liabilities	338,835	323,732
STOCKHOLDERS’ EQUITY:
Preferred stock — 5,000 shares authorized as of June 30, 2013 and December 31, 2012; no shares issued	0	0
Common stock — no par value; 100,000 shares authorized; 42,586 and 42,489 shares issued at June 30, 2013 and December 31, 2012, respectively	173,974	172,341
Retained earnings	214,841	210,418
Accumulated other comprehensive income (loss)	734	(1,182)
Total stockholders’ equity	389,549	381,577
TOTAL	728,384	705,309
Developed Technology Rights [Member]
OTHER ASSETS:
Intangible Assets	83,749	87,332
Other Intangible Assets [Member]
OTHER ASSETS:
Intangible Assets	$ 28,954	$ 30,799