CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
CURRENT ASSETS:
Cash and cash equivalents	$ 50,080	$ 44,320
Trade receivables - net of allowance for uncollectible accounts - 2020 - $4,124 and 2019 - $3,108	150,050	155,365
Other receivables	9,246	10,016
Inventories	227,776	225,698
Prepaid expenses and other current assets	16,284	12,497
Prepaid income taxes	3,486	3,491
Income tax refund receivables	5,586	3,151
Total current assets	462,508	454,538
PROPERTY AND EQUIPMENT:
Land and land improvements	27,695	27,554
Buildings	153,896	153,863
Manufacturing equipment	247,878	244,368
Furniture and fixtures	58,955	57,623
Leasehold improvements	43,950	43,311
Construction-in-progress	91,802	83,685
Total property and equipment	624,176	610,404
Less accumulated depreciation	(239,316)	(231,619)
Property and equipment - net	384,860	378,785
OTHER ASSETS:
Goodwill	352,242	353,193
Deferred income tax assets	3,716	3,788
Right-of-use operating lease assets	79,133	80,244
Other assets	36,569	41,461
Total other assets	901,904	923,998
TOTAL ASSETS	1,749,272	1,757,321
CURRENT LIABILITIES:
Trade payables	56,012	54,623
Accrued expenses	87,095	105,184
Current portion of long-term debt	7,500	7,500
Short-term operating lease liabilities	11,670	11,550
Income taxes payable	3,014	2,799
Total current liabilities	165,291	181,656
LONG-TERM DEBT	438,137	431,984
DEFERRED INCOME TAX LIABILITIES	45,027	45,236
LONG-TERM INCOME TAXES PAYABLE	347	347
LIABILITIES RELATED TO UNRECOGNIZED TAX BENEFITS	1,990	1,990
DEFERRED COMPENSATION PAYABLE	14,066	14,855
DEFERRED CREDITS	2,088	2,122
LONG-TERM OPERATING LEASE LIABILITIES	71,642	72,714
OTHER LONG-TERM OBLIGATIONS	70,886	56,473
Total liabilities	809,474	807,377
COMMITMENTS AND CONTINGENCIES (Notes 4, 8, 9 and 10)
STOCKHOLDERS' EQUITY:
Preferred stock - 5,000 shares authorized as of March 31, 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 March 31, 2020 - 55,338 and December 31, 2019 - 55,213	590,065	587,017
Retained earnings	364,492	368,221
Accumulated other comprehensive loss	(14,759)	(5,294)
Total stockholders' equity	939,798	949,944
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	1,749,272	1,757,321
Developed technology
OTHER ASSETS:
Intangible assets	366,551	379,529
Other
OTHER ASSETS:
Intangible assets	$ 63,693	$ 65,783