CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
CURRENT ASSETS:
Cash and cash equivalents	$ 67,359	$ 32,336
Trade receivables — net of allowance for uncollectible accounts — 2018 — $2,355 and 2017 — $1,769	137,174	105,536
Other receivables	11,879	9,429
Inventories	197,536	155,288
Prepaid expenses and other assets	11,326	9,096
Prepaid income taxes	3,627	3,225
Income tax refund receivables	933	1,211
Total current assets	429,834	316,121
PROPERTY AND EQUIPMENT:
Land and land improvements	26,801	19,877
Buildings	151,251	147,356
Manufacturing equipment	221,029	197,651
Furniture and fixtures	54,765	49,528
Leasehold improvements	33,678	31,161
Construction-in-progress	53,491	32,896
Total property and equipment	541,015	478,469
Less accumulated depreciation	(209,563)	(185,649)
Property and equipment — net	331,452	292,820
OTHER ASSETS:
Goodwill	335,433	238,147
Deferred income tax assets	3,001	2,359
Other assets	57,579	35,040
Total other assets	858,726	502,870
TOTAL	1,620,012	1,111,811
CURRENT LIABILITIES:
Trade payables	54,024	34,931
Accrued expenses	96,173	58,932
Current portion of long-term debt	22,000	19,459
Income taxes payable	3,146	2,298
Total current liabilities	175,343	115,620
LONG-TERM DEBT	373,152	259,013
DEFERRED INCOME TAX LIABILITIES	56,363	23,289
LONG-TERM INCOME TAXES PAYABLE	392	4,846
LIABILITIES RELATED TO UNRECOGNIZED TAX BENEFITS	3,013	2,746
DEFERRED COMPENSATION PAYABLE	11,219	11,181
DEFERRED CREDITS	2,261	2,403
OTHER LONG-TERM OBLIGATIONS	65,494	16,379
Total liabilities	687,237	435,477
COMMITMENTS AND CONTINGENCIES (Notes 3, 8, 9, and 10)
STOCKHOLDERS’ EQUITY:
Preferred stock — 5,000 shares authorized as of December 31, 2018 and 2017; no shares issued	0	0
Common stock, no par value; shares authorized — 2018 and 2017 - 100,000; issued and outstanding as of December 31, 2018 - 54,893 and December 31, 2017 - 50,248	571,383	353,392
Retained earnings	363,425	321,408
Accumulated other comprehensive income (loss)	(2,033)	1,534
Total stockholders’ equity	932,775	676,334
TOTAL	1,620,012	1,111,811
Developed technology — net of accumulated amortization — 2018 — $102,357 and 2017 — $72,420
OTHER ASSETS:
Intangible assets	383,147	167,771
Other — net of accumulated amortization — 2018 — $49,136 and 2017 — $38,127
OTHER ASSETS:
Intangible assets	$ 79,566	$ 59,553