Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 227,790	$ 418,855
Trade accounts receivable, net (Note 2)	52,430	70,679
Inventory (Note 5)	287,376	111,943
Deferred charges (Note 15)	9,412	7,318
Deferred tax assets (Note 15)	9,789	0
Income tax receivable	25,087	10,514
Prepaid expenses and other current assets	21,794	19,735
Total current assets	633,678	639,044
Non-current assets:
Deposits (Note 6)	26,769	23,286
Property, plant and equipment, net (Note 7)	1,544,304	561,628
Inventory (Note 5)	26,096	4,362
Intangible assets, net (Note 9)	450,938	3,072
Investments	64,036	20,000
Goodwill (Note 9)	239,742	3,432
Other non-current assets	6,972	301
Total non-current assets	2,358,857	616,081
Total assets	2,992,535	1,255,125
Current liabilities:
Trade accounts payable	241,994	161,587
Accrued expenses (Note 12)	59,013	12,898
Income tax payable	15,267	0
Deferred tax liabilities (Note 15)	0	1,356
Debt and capital lease obligations (Note 14)	39,604	1,516
Other current liabilities	3,539	1,266
Total current liabilities	359,417	178,623
Non-current liabilities:
Asset retirement obligation (Note 13)	18,586	15,145
Deferred tax liabilities (Note 15)	160,675	18,899
Debt and capital lease obligations (Note 14)	1,188,832	196,545
Derivative liability (Note 25)	7,816	0
Pension liabilities (Note 26)	3,292	0
Other non-current liabilities	2,659	683
Total non-current liabilities	1,381,860	231,272
Total liabilities	1,741,277	409,895
Commitments and contingencies (Note 19)
Stockholders’ equity:
Common stock, $0.001 par value; 350,000,000 shares authorized at December 31, 2012 (Note 16)	139	84
Preferred stock, $0.001 par value; 5,000,000 shares authorized at December 31, 2012 (Note 16)	2	2
Additional paid-in capital	1,691,429	838,547
Accumulated other comprehensive loss	(9,433)	(8,481)
(Deficit) retained earnings	(466,091)	15,078
Total Molycorp stockholders’ equity	1,216,046	845,230
Noncontrolling interests	35,212	0
Total stockholders’ equity	1,251,258	845,230
Total liabilities and stockholders’ equity	$ 2,992,535	$ 1,255,125