Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019
Current assets
Cash and cash equivalents	$ 311,465	$ 230,210	$ 194,061
Trade accounts receivable, net	226,447	139,364	180,898
Inventories	260,054	251,907	242,730
Other current assets	22,439	19,426	17,565
Total current assets	820,405	640,907	635,254
Property, plant and equipment, net	246,472	249,012	250,950
Operating lease right-of-use assets	41,453	35,436	34,463
Goodwill	133,734	131,879	131,191
Equity investment	2,475	2,480	2,485
Intangible assets, net	20,964	25,071	21,816
Other noncurrent assets	12,362	10,581	10,149
Total Assets	1,277,865	1,095,366	1,086,308
Current liabilities
Trade accounts payable	42,271	33,351	40,861
Accrued liabilities and other current liabilities	148,890	125,556	125,006
Total current liabilities	191,161	158,907	165,867
Operating lease liabilities	33,354	27,930	27,256
Long term debt, net of current portion	75,000	0	0
Deferred income tax and other long-term liabilities	17,550	16,572	16,238
Total liabilities	317,065	203,409	209,361
Commitments and contingencies (see Note 12)
Stockholders’ equity
Common stock, at par value	444	442	446
Additional paid-in capital	281,134	280,216	278,898
Retained earnings	772,851	645,507	649,053
Treasury stock	(72,058)	(9,379)	(21,437)
Accumulated other comprehensive loss	(21,571)	(24,829)	(30,013)
Total stockholders’ equity	960,800	891,957	876,947
Total liabilities and stockholders’ equity	$ 1,277,865	$ 1,095,366	$ 1,086,308