CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Current assets
Cash and cash equivalents	$ 437,560	$ 340,101
Restricted cash	74,321	182,072
Accounts receivable, net	97,462	65,173
Inventories	72,691	64,970
Deferred income taxes	22,794	21,552
Other assets	21,976	17,449
Total current assets	728,186	691,751
Non-current assets
Property, plant and equipment, net	1,322,097	1,008,337
Goodwill	35,634	35,634
Deferred income taxes	142,592	140,985
Other assets	34,493	38,400
Total assets	2,263,002	1,915,107
Current liabilities
Accounts payable	71,928	81,975
Royalties and production taxes	144,354	127,038
Accrued expenses	56,670	51,197
Current portion of federal coal lease obligations	105,926	54,630
Other liabilities	4,847	4,880
Total current liabilities	393,134	337,946
Non-current liabilities
Senior notes	595,977	595,684
Federal coal lease obligations, net of current portion	186,119	63,659
Asset retirement obligations, net of current portion	171,184	182,170
Other liabilities	37,288	32,564
Total liabilities	1,554,338	1,383,908
Commitments and Contingencies (Note 9)
Equity
Accumulated other comprehensive loss	(14,032)	(14,658)
Total equity	708,664	531,199
Total liabilities and equity	2,263,002	1,915,107
CLOUD PEAK ENERGY RESOURCES LLC AND SUBSIDIARIES
Current assets
Cash and cash equivalents	437,560	340,100
Restricted cash	74,321	182,072
Accounts receivable, net	97,462	65,173
Inventories	72,691	64,970
Deferred income taxes	19,408	15,069
Other assets	17,417	10,743
Total current assets	718,859	678,127
Non-current assets
Property, plant and equipment, net	1,322,097	1,008,337
Goodwill	35,634	35,634
Deferred income taxes	81,162	78,964
Other assets	34,445	38,305
Total assets	2,192,197	1,839,367
Current liabilities
Accounts payable	71,894	81,842
Royalties and production taxes	144,354	127,038
Accrued expenses	54,767	46,777
Due to related parties	13,717	10,864
Current portion of federal coal lease obligations	105,926	54,630
Other liabilities	4,847	4,880
Total current liabilities	395,505	326,031
Non-current liabilities
Senior notes	595,977	595,684
Federal coal lease obligations, net of current portion	186,119	63,659
Asset retirement obligations, net of current portion	171,184	182,170
Other liabilities	37,288	32,564
Total liabilities	1,386,073	1,200,108
Commitments and Contingencies (Note 9)
Equity
Member's equity	820,156	653,917
Accumulated other comprehensive loss	(14,032)	(14,658)
Total member's equity	806,124	639,259
Total liabilities and equity	$ 2,192,197	$ 1,839,367