CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 423,126	$ 418,100
Trade receivables, net	218,507	202,165
Inventories, net	194,513	191,194
Prepaids and other current assets	31,997	41,522
Total current assets	868,143	852,981
Operating lease right of use assets	4,295
Property, plant and equipment, net	265,591	274,123
Deferred income taxes	7,984	7,995
Goodwill	7,633	7,714
Intangible assets	33,811	34,974
Other assets	14,444	14,723
Total assets	1,201,901	1,192,510
Current liabilities:
Accounts payable	34,681	26,693
Accrued income taxes	4,441	3,138
Customer prepayments	8,533	9,648
Accrued compensation	11,416	10,537
Operating lease liabilities	1,276
Other accrued liabilities	26,750	32,242
Total current liabilities	87,097	82,258
Deferred income taxes	2,623	2,466
Income tax payable	9,817	9,623
Operating lease liabilities, long-term	3,005
Other long-term liabilities	2,231	2,001
Total liabilities	104,773	96,348
Commitments and contingencies (Note 13)
Stockholders' equity:
Preferred stock: 10,000,000 shares authorized at $0.01 par value (none issued)
Common stock:
100,000,000 shares authorized at $0.01 par value, 36,207,042 and 36,264,001 shares issued and outstanding at June 30, 2019 and December 31, 2018	376	376
Additional paid-in capital	43,053	34,953
Retained earnings	1,199,502	1,205,946
Accumulated other comprehensive losses	(145,803)	(145,113)
Total stockholders' equity	1,097,128	1,096,162
Total liabilities and stockholders' equity	$ 1,201,901	$ 1,192,510