CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
CURRENT ASSETS:
Cash and cash equivalents	$ 51,955	$ 32,336
Trade receivables — net of allowance for uncollectible accounts — 2018 — $1,921 and 2017 — $1,769	129,282	105,536
Other receivables	8,903	9,429
Inventories	181,439	155,288
Prepaid expenses and other assets	11,720	9,096
Prepaid income taxes	3,307	3,225
Income tax refund receivables	1,043	1,211
Total current assets	387,649	316,121
PROPERTY AND EQUIPMENT:
Land and land improvements	26,926	19,877
Buildings	150,880	147,356
Manufacturing equipment	211,215	197,651
Furniture and fixtures	53,869	49,528
Leasehold improvements	33,365	31,161
Construction-in-progress	48,166	32,896
Total property and equipment	524,421	478,469
Less accumulated depreciation	(204,496)	(185,649)
Property and equipment — net	319,925	292,820
OTHER ASSETS:
Goodwill	249,023	238,147
Deferred income tax assets	2,254	2,359
Other assets	61,927	35,040
Total other assets	602,309	502,870
TOTAL	1,309,883	1,111,811
CURRENT LIABILITIES:
Trade payables	50,697	34,931
Accrued expenses	65,530	58,932
Current portion of long-term debt	22,000	19,459
Income taxes payable	1,598	2,298
Total current liabilities	139,825	115,620
LONG-TERM DEBT	186,867	259,013
DEFERRED INCOME TAX LIABILITIES	23,102	23,289
LONG-TERM INCOME TAXES PAYABLE	4,846	4,846
LIABILITIES RELATED TO UNRECOGNIZED TAX BENEFITS	2,746	2,746
DEFERRED COMPENSATION PAYABLE	12,176	11,181
DEFERRED CREDITS	2,296	2,403
OTHER LONG-TERM OBLIGATIONS	14,814	16,379
Total liabilities	386,672	435,477
COMMITMENTS AND CONTINGENCIES (Notes 5, 10, 11, and 14)
STOCKHOLDERS’ EQUITY:
Preferred stock — 5,000 shares authorized as of September 30, 2018 and December 31, 2017; no shares issued	0	0
Common stock, no par value; shares authorized — 2018 and 2017 - 100,000; issued and outstanding as of September 30, 2018 - 54,802 and December 31, 2017 - 50,248	568,051	353,392
Retained earnings	354,236	321,408
Accumulated other comprehensive income	924	1,534
Total stockholders’ equity	923,211	676,334
TOTAL	1,309,883	1,111,811
Developed technology — net of accumulated amortization — 2018 — $93,680 and 2017 — $72,420
OTHER ASSETS:
Intangible assets	224,540	167,771
Other — net of accumulated amortization — 2018 — $46,088 and 2017 — $38,127
OTHER ASSETS:
Intangible assets	$ 64,565	$ 59,553