CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 495,591	$ 493,180
Trade receivables, net	193,915	191,629
Inventories, net	276,005	291,087
Prepaids and other current assets	36,620	32,653
Total current assets	1,002,131	1,008,549
Property, plant and equipment, net	288,466	284,247
Deferred income taxes	5,471	5,364
Goodwill	47,818	47,624
Intangible assets	37,892	38,408
Other assets	16,084	15,613
Total assets	1,397,862	1,399,805
Current liabilities:
Accounts payable	25,277	33,480
Accrued income taxes	27,632	24,714
Customer prepayments	5,809	4,767
Accrued compensation	11,116	11,412
Other accrued liabilities	17,404	25,538
Total current liabilities	87,238	99,911
Deferred income taxes	3,514	3,432
Other long-term liabilities	2,001	2,001
Total liabilities	92,753	105,344
Commitments and contingencies (Note 11)
Stockholders’ equity:
Preferred stock, 10,000,000 shares authorized at $0.01 par value (none issued)	0	0
Common stock:
100,000,000 shares authorized at $0.01 par value, 38,136,258 and 38,132,693 shares issued and outstanding at March 31, 2018 and December 31, 2017	381	372
Additional paid-in capital	23,964	20,083
Retained earnings	1,393,933	1,400,296
Accumulated other comprehensive losses	(113,169)	(126,290)
Total stockholders’ equity	1,305,109	1,294,461
Total liabilities and stockholders’ equity	$ 1,397,862	$ 1,399,805