Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	[1]
Current assets:
Cash and cash equivalents	$ 250,383	$ 230,965
Accounts receivable, net of allowance of $2,501 and $1,801	192,067	223,098
Inventories, net	87,880	89,684
Income tax receivable	0	3,602
Prepaid expenses and other	3,552	1,889
Total current assets	533,882	549,238
Property, plant and equipment - at cost:
Land and land improvements	60,662	52,354
Construction-in-progress	45,226	49,847
Buildings and improvements	152,896	152,536
Machinery and equipment	353,300	334,204
Furniture and fixtures	12,249	10,926
Total property, plant and equipment	624,333	599,867
Accumulated depreciation	(274,804)	(266,688)
Property, plant and equipment - net	349,529	333,179
Other assets	634	737
Total assets	884,045	883,154
Current liabilities:
Trade accounts payable	30,039	40,509
Accrued liabilities	27,338	34,787
Income taxes payable	2,499	0
Total current liabilities	59,876	75,296
Deferred income taxes and other	32,058	28,762
Commitments and contingencies
Stockholders’ equity:
Authorized shares – 2,000,000; none issued	0	0
Issued shares – 27,005,388 and 26,939,403	270	269
Additional paid-in capital	66,554	63,009
Treasury stock, at cost – 6,468,705 and 6,027,455 shares	(111,718)	(91,056)
Retained earnings	837,005	806,874
Total stockholders’ equity	792,111	779,096
Total liabilities and stockholders’ equity	$ 884,045	$ 883,154

[1] The balance sheet at December 31, 2019, as presented, is derived from the audited financial statements at that date.