Unaudited Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 338,730	$ 292,656
Receivables, net	131,322	115,446
Inventories	89,531	70,941
Prepaid expenses and other current assets	6,930	6,130
Total current assets	566,513	485,173
Restricted cash	781	781
Property, plant and equipment, net	198,724	162,232
Deferred income taxes	52	1,311
Other assets	1,047	853
Total assets	767,117	650,350
Current liabilities:
Current maturities of long-term debt	4,000	3,960
Accounts payable	51,412	35,238
Other current liabilities	56,843	59,629
Total current liabilities	112,255	98,827
Long-term debt	391,618	379,177
Deferred income taxes	13,803	12,660
Other long-term liabilities	11,370	13,348
Total liabilities	529,046	504,012
Commitments and contingencies
Stockholders’ equity:
Preferred stock; $0.01 par value; 150,000,000 shares authorized; none issued or outstanding at June 30, 2017 and December 31, 2016	0	0
Common stock, voting; $0.01 par value; 1,500,000,000 shares authorized; 197,126,614 and 196,524,010 shares issued and outstanding at June 30, 2017 and December 31, 2016, respectively	1,971	1,965
Additional paid-in capital	76,841	71,420
Retained earnings	159,464	72,692
Accumulated other comprehensive (loss) income	(205)	261
Total stockholders’ equity	238,071	146,338
Total liabilities and stockholders’ equity	$ 767,117	$ 650,350