CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
CURRENT ASSETS:
Cash and cash equivalents	$ 44,320	$ 67,359
Trade receivables - net of allowance for uncollectible accounts - 2019 - $3,108 and 2018 - $2,355	155,365	137,174
Other receivables	10,016	11,879
Inventories	225,698	197,536
Prepaid expenses and other current assets	12,497	11,326
Prepaid income taxes	3,491	3,627
Income tax refund receivables	3,151	933
Total current assets	454,538	429,834
PROPERTY AND EQUIPMENT:
Land and land improvements	27,554	26,801
Buildings	153,863	151,251
Manufacturing equipment	244,368	221,029
Furniture and fixtures	57,623	54,765
Leasehold improvements	43,311	33,678
Construction-in-progress	83,685	53,491
Total property and equipment	610,404	541,015
Less accumulated depreciation	(231,619)	(209,563)
Property and equipment - net	378,785	331,452
OTHER ASSETS:
Goodwill	353,193	335,433
Deferred income tax assets	3,788	3,001
Right-of-use operating lease assets	80,244
Other assets	41,461	57,579
Total other assets	923,998	858,726
TOTAL ASSETS	1,757,321	1,620,012
CURRENT LIABILITIES:
Trade payables	54,623	54,024
Accrued expenses	105,184	96,173
Current portion of long-term debt	7,500	22,000
Short-term operating lease liabilities	11,550
Income taxes payable	2,799	3,146
Total current liabilities	181,656	175,343
LONG-TERM DEBT	431,984	373,152
DEFERRED INCOME TAX LIABILITIES	45,236	56,363
LONG-TERM INCOME TAXES PAYABLE	347	392
LIABILITIES RELATED TO UNRECOGNIZED TAX BENEFITS	1,990	3,013
DEFERRED COMPENSATION PAYABLE	14,855	11,219
DEFERRED CREDITS	2,122	2,261
LONG-TERM OPERATING LEASE LIABILITIES	72,714
OTHER LONG-TERM OBLIGATIONS	56,473	65,494
Total liabilities	807,377	687,237
COMMITMENTS AND CONTINGENCIES (Notes 3, 8, 9, 10 and 18)
STOCKHOLDERS' EQUITY:
Preferred stock - 5,000 shares authorized as of December 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 December 31, 2019 - 55,213 and December 31, 2018 - 54,893	587,017	571,383
Retained earnings	368,221	363,425
Accumulated other comprehensive loss	(5,294)	(2,033)
Total stockholders' equity	949,944	932,775
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	1,757,321	1,620,012
Developed technology
OTHER ASSETS:
Intangible assets	379,529	383,147
Other
OTHER ASSETS:
Intangible assets	$ 65,783	$ 79,566