Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018
Current assets
Cash and cash equivalents	$ 113,407	$ 160,180	$ 137,413
Trade accounts receivable, net	173,140	146,052	167,146
Inventories	272,459	276,088	256,552
Assets held-for-sale	2,546	627	0
Other current assets	14,186	16,582	22,423
Total current assets	575,738	599,529	583,534
Property, plant and equipment, net	251,398	254,597	276,114
Operating lease right-of-use assets	34,324
Goodwill	131,712	130,250	138,026
Equity investment	2,511	2,487	2,525
Intangible assets, net	24,148	24,402	28,302
Other noncurrent assets	10,521	10,398	11,841
Total Assets	1,030,352	1,021,663	1,040,342
Current liabilities
Trade accounts payable	35,549	34,361	42,098
Accrued liabilities and other current liabilities	115,029	117,219	101,130
Total current liabilities	150,578	151,580	143,228
Operating lease liabilities	28,878
Deferred income tax and other long-term liabilities	15,422	14,569	18,052
Total liabilities	194,878	166,149	161,280
Commitments and contingencies (see Note 12)
Stockholders’ equity
Common stock, at par value	455	453	475
Additional paid-in capital	274,836	276,504	269,004
Retained Earnings	641,168	628,207	693,218
Treasury stock	(55,000)	(25,000)	(74,999)
Accumulated other comprehensive loss	(25,985)	(24,650)	(8,636)
Total stockholders’ equity	835,474	855,514	879,062
Total liabilities and stockholders’ equity	$ 1,030,352	$ 1,021,663	$ 1,040,342