Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 381,336	$ 298,705
Trade receivables, net	319,780	373,993
Inventories, net	344,458	392,559
Deferred income taxes	24,613	23,569
Prepaids and other current assets	54,111	38,314
Total current assets	1,124,298	1,127,140
Property, plant and equipment, net	294,251	309,525
Other assets	9,701	12,586
Total assets	1,428,250	1,449,251
Current liabilities:
Accounts payable	30,934	53,837
Accrued income taxes	14,052	16,903
Customer prepayments	18,388	71,177
Accrued compensation	17,957	21,527
Other accrued liabilities	19,484	35,198
Total current liabilities	100,815	198,642
Deferred income taxes	2,977	5,417
Total liabilities	$ 103,792	$ 204,059
Commitments and contingencies (Note 9)
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 December 31, 2015 and 2014, 37,951,223 and 38,932,508 issued and outstanding at December 31, 2015 and 2014	$ 378	$ 388
Additional paid-in capital		16,480
Retained earnings	1,425,344	1,278,528
Accumulated other comprehensive losses	(101,264)	(50,204)
Total stockholders' equity	1,324,458	1,245,192
Total liabilities and stockholders' equity	$ 1,428,250	$ 1,449,251