CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
CURRENT ASSETS:
Cash and cash equivalents	$ 5,162	$ 4,177
Trade receivables — net of allowance for uncollectible accounts — 2016 — $1,451 and 2015 — $1,297	71,574	70,292
Employee receivables	263	217
Other receivables	5,501	6,799
Inventories	110,726	105,999
Prepaid expenses	6,181	5,634
Prepaid income taxes	3,049	2,955
Deferred income tax assets	7,049	7,025
Income tax refund receivables	504	905
Total current assets	210,009	204,003
PROPERTY AND EQUIPMENT:
Land and land improvements	19,464	19,307
Buildings	137,890	136,595
Manufacturing equipment	161,503	158,775
Furniture and fixtures	40,904	39,301
Leasehold improvements	28,350	27,561
Construction-in-progress	30,837	26,292
Total property and equipment	418,948	407,831
Less accumulated depreciation	(146,057)	(140,053)
Property and equipment — net	272,891	267,778
OTHER ASSETS:
Goodwill	187,047	184,472
Other assets	13,664	13,121
Total other assets	320,520	306,947
TOTAL	803,420	778,728
CURRENT LIABILITIES:
Trade payables	39,104	37,977
Accrued expenses	33,866	37,846
Current portion of long-term debt	10,000	10,000
Advances from employees	207	589
Income taxes payable	2,145	1,498
Total current liabilities	85,322	87,910
LONG-TERM DEBT	218,402	197,593
DEFERRED INCOME TAX LIABILITIES	11,099	10,985
LIABILITIES RELATED TO UNRECOGNIZED TAX BENEFITS	768	768
DEFERRED COMPENSATION PAYABLE	8,195	8,500
DEFERRED CREDITS	2,678	2,721
OTHER LONG-TERM OBLIGATIONS	4,632	4,148
Total liabilities	$ 331,096	$ 312,625
COMMITMENTS AND CONTINGENCIES (Notes 5, 9, 10, and 13)
STOCKHOLDERS’ EQUITY:
Preferred stock — 5,000 shares authorized as of March 31, 2016 and December 31, 2015; no shares issued
Common stock, no par value; shares authorized — 100,000; issued and outstanding as of March 31, 2016 - 44,303 and December 31, 2015 - 44,267	$ 199,003	$ 197,826
Retained earnings	278,115	273,764
Accumulated other comprehensive loss	(4,794)	(5,487)
Total stockholders’ equity	472,324	466,103
TOTAL	803,420	778,728
Developed technology — net of accumulated amortization — 2016 — $41,290 and 2015 — $38,497
OTHER ASSETS:
Intangible Assets	79,168	69,861
Other — net of accumulated amortization — 2016 — $27,605 and 2015 — $26,603
OTHER ASSETS:
Intangible Assets	$ 40,641	$ 39,493