CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
CURRENT ASSETS:
Cash and cash equivalents	$ 49,702	$ 44,320
Trade receivables - net of allowance for uncollectible accounts - 2020 - $3,866 and 2019 - $3,108	138,792	155,365
Other receivables	8,214	10,016
Inventories	221,417	225,698
Prepaid expenses and other current assets	13,860	12,497
Prepaid income taxes	3,493	3,491
Income tax refund receivables	10,467	3,151
Total current assets	445,945	454,538
PROPERTY AND EQUIPMENT:
Land and land improvements	27,815	27,554
Buildings	181,749	153,863
Manufacturing equipment	257,493	244,368
Furniture and fixtures	60,358	57,623
Leasehold improvements	44,952	43,311
Construction-in-progress	59,523	83,685
Total property and equipment	631,890	610,404
Less accumulated depreciation	(248,261)	(231,619)
Property and equipment - net	383,629	378,785
OTHER ASSETS:
Goodwill	353,093	353,193
Deferred income tax assets	3,748	3,788
Right-of-use operating lease assets	79,051	80,244
Other assets	36,413	41,461
Total other assets	886,295	923,998
TOTAL ASSETS	1,715,869	1,757,321
CURRENT LIABILITIES:
Trade payables	44,444	54,623
Accrued expenses	106,934	105,184
Current portion of long-term debt	7,500	7,500
Short-term operating lease liabilities	12,886	11,550
Income taxes payable	2,460	2,799
Total current liabilities	174,224	181,656
LONG-TERM DEBT	402,915	431,984
DEFERRED INCOME TAX LIABILITIES	45,236	45,236
LONG-TERM INCOME TAXES PAYABLE	347	347
LIABILITIES RELATED TO UNRECOGNIZED TAX BENEFITS	1,990	1,990
DEFERRED COMPENSATION PAYABLE	14,194	14,855
DEFERRED CREDITS	2,053	2,122
LONG-TERM OPERATING LEASE LIABILITIES	71,785	72,714
OTHER LONG-TERM OBLIGATIONS	74,278	56,473
Total liabilities	787,022	807,377
COMMITMENTS AND CONTINGENCIES (Notes 4, 8, 9 and 10)
STOCKHOLDERS' EQUITY:
Preferred stock - 5,000 shares authorized as of June 30, 2020 and December 31, 2019; no shares issued	0	0
Common stock, no par value; shares authorized - 2020 and 2019 - 100,000; issued and outstanding as of June 30, 2020 - 55,481 and December 31, 2019 - 55,213	595,726	587,017
Retained earnings	345,434	368,221
Accumulated other comprehensive loss	(12,313)	(5,294)
Total stockholders' equity	928,847	949,944
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	1,715,869	1,757,321
Developed technology
OTHER ASSETS:
Intangible assets	354,273	379,529
Other
OTHER ASSETS:
Intangible assets	$ 59,717	$ 65,783