CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
CURRENT ASSETS:
Cash and cash equivalents	$ 49,522	$ 67,359
Trade receivables — net of allowance for uncollectible accounts — 2019 — $2,406 and 2018 — $2,355	146,488	137,174
Other receivables	10,694	11,879
Inventories	198,922	197,536
Prepaid expenses and current other assets	11,220	11,326
Prepaid income taxes	3,620	3,627
Income tax refund receivables	1,317	933
Total current assets	421,783	429,834
PROPERTY AND EQUIPMENT:
Land and land improvements	26,764	26,801
Buildings	152,974	151,251
Manufacturing equipment	225,402	221,029
Furniture and fixtures	55,378	54,765
Leasehold improvements	34,221	33,678
Construction-in-progress	61,304	53,491
Total property and equipment	556,043	541,015
Less accumulated depreciation	(215,279)	(209,563)
Property and equipment — net	340,764	331,452
OTHER ASSETS:
Intangible assets	77,104	79,566
Goodwill	334,951	335,433
Deferred income tax assets	3,083	3,001
Right-of-use operating lease assets	80,453
Other assets	60,052	57,579
Total other assets	927,246	858,726
TOTAL	1,689,793	1,620,012
CURRENT LIABILITIES:
Trade payables	51,680	54,024
Accrued expenses	91,310	96,173
Current portion of long-term debt	22,000	22,000
Short-term operating lease liability	11,825
Income taxes payable	1,644	3,146
Total current liabilities	178,459	175,343
LONG-TERM DEBT	362,187	373,152
DEFERRED INCOME TAX LIABILITIES	56,324	56,363
LONG-TERM INCOME TAXES PAYABLE	392	392
LIABILITIES RELATED TO UNRECOGNIZED TAX BENEFITS	3,013	3,013
DEFERRED COMPENSATION PAYABLE	12,480	11,219
DEFERRED CREDITS	2,227	2,261
LONG-TERM OPERATING LEASE LIABILITY	72,243
OTHER LONG-TERM OBLIGATIONS	62,357	65,494
Total liabilities	749,682	687,237
COMMITMENTS AND CONTINGENCIES (Notes 5, 10, 11, 14 and 15)
STOCKHOLDERS’ EQUITY:
Preferred stock — 5,000 shares authorized as of March 31, 2019 and December 31, 2018; no shares issued	0	0
Common stock, no par value; shares authorized — 2019 and 2018 - 100,000; issued and outstanding as of March 31, 2019 - 54,995 and December 31, 2018 - 54,893	574,946	571,383
Retained earnings	369,713	363,425
Accumulated other comprehensive loss	(4,548)	(2,033)
Total stockholders’ equity	940,111	932,775
TOTAL	1,689,793	1,620,012
Developed technology — net of accumulated amortization — 2019 — $113,765 and 2018 — $102,357
OTHER ASSETS:
Intangible assets	371,603	383,147
Other — net of accumulated amortization — 2019 — $52,469 and 2018 — $49,136
OTHER ASSETS:
Intangible assets	$ 77,104	$ 79,566