Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 314,964	$ 384,356
Trade receivables, net	331,572	279,253
Inventories, net	407,916	368,354
Deferred income taxes	22,580	24,951
Prepaids and other current assets	26,937	21,899
Total current assets	1,103,969	1,078,813
Property, plant and equipment, net	310,300	304,806
Other assets	14,761	10,993
Total assets	1,429,030	1,394,612
Current liabilities:
Accounts payable	48,134	38,801
Accrued income taxes	10,853	13,628
Customer prepayments	57,810	45,025
Accrued compensation	20,956	21,556
Other accrued liabilities	31,672	23,780
Total current liabilities	169,425	142,790
Deferred income taxes	9,496	9,804
Total liabilities	178,921	152,594
Commitments and contingencies (Note 7)
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, 39,473,809 and 40,822,627 shares issued and outstanding at September 30, 2014 and December 31, 2013	393	407
Additional paid-in capital	62,450	191,965
Retained earnings	1,219,440	1,069,816
Accumulated other comprehensive losses	(32,174)	(20,170)
Total stockholders' equity	1,250,109	1,242,018
Total liabilities and stockholders' equity	$ 1,429,030	$ 1,394,612