Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 382,673	$ 298,705
Trade receivables, net	299,398	373,993
Inventories, net	383,773	392,559
Deferred income taxes	27,028	23,569
Prepaids and other current assets	38,099	38,314
Total current assets	1,130,971	1,127,140
Property, plant and equipment, net	301,635	309,525
Other assets	14,180	12,586
Total assets	1,446,786	1,449,251
Current liabilities:
Accounts payable	39,520	53,837
Accrued income taxes	9,515	16,903
Customer prepayments	39,608	71,177
Accrued compensation	19,097	21,527
Other accrued liabilities	18,977	35,198
Total current liabilities	126,717	198,642
Deferred income taxes	4,298	5,417
Total liabilities	$ 131,015	$ 204,059
Commitments and contingencies (Note 7)
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 at June 30, 2015 and December 31, 2014, 38,705,278 and 38,932,508 shares issued and outstanding at June 30, 2015 and December 31, 2014	$ 385	$ 388
Additional paid-in capital	4,880	16,480
Retained earnings	1,371,403	1,278,528
Accumulated other comprehensive losses	(60,897)	(50,204)
Total stockholders' equity	1,315,771	1,245,192
Total liabilities and stockholders' equity	$ 1,446,786	$ 1,449,251