CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
ASSETS
Cash and cash equivalents	$ 267,003	$ 468,532
Trade receivables, net	71,670	91,057
Other receivables	128,735	127,037
Inventories	162,106	201,598
Deferred income taxes	16,247	16,819
Prepaid expenses	52,194	46,190
Other current assets	9,080	9,285
Total current assets	707,035	960,518
Mineral interests, net	446,570	2,836,801
Property, plant and equipment, net	903,685	1,466,297
Other long-term assets	70,422	67,748
Total assets	2,127,712	5,331,364
LIABILITIES AND STOCKHOLDERS' EQUITY (DEFICIT)
Accounts payable	50,752	38,980
Accrued expenses	129,400	125,318
Pension and other postretirement benefits obligation	29,788	29,032
Liability for uncertain tax positions	166,100	164,348
Other current liabilities	53,411	51,604
Current debt	3,025,849	12,327
Total current liabilities	3,455,300	421,609
Long-term debt	0	3,068,878
Deferred income taxes	70,037	730,685
Pension and other postretirement benefits obligation	645,879	641,231
Other long-term liabilities	188,425	187,380
Total liabilities	4,359,641	5,049,783
Stockholders' equity (deficit):
Preferred stock, $0.01 par value per share: Authorized - 20,00,000 shares; none issued	0	0
Common stock, $0.01 par value per share: Authorized—200,000,000 shares; issued—80,747,089 and 71,978,113 shares, respectively	807	720
Capital in excess of par value	1,679,576	1,668,407
Accumulated deficit	(3,704,758)	(1,169,498)
Accumulated deficit	(207,554)	(218,048)
Total stockholders' equity (deficit)	(2,231,929)	281,581
Total liabilities and stockholders' equity (deficit)	$ 2,127,712	$ 5,331,364