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Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2012
Dec. 31, 2011
Current assets:    
Cash and cash equivalents $ 107,404 $ 214,922
Accounts receivable, net of allowance for doubtful accounts 34,075 30,923
Accounts receivable - affiliates 13,040 10,138
Other 632 832
Total current assets 155,151 256,815
Land 24,534 24,534
Plant and equipment, net 54,416 46,185
Coal and other mineral rights, net 1,310,590 1,257,501
Intangible assets, net 74,209 75,164
Loan financing costs, net 4,707 4,846
Long-term contracts - affiliate 47,663  
Other assets, net 604 604
Total assets 1,671,874 1,665,649
Current liabilities:    
Accounts payable and accrued liabilities 2,685 2,366
Accounts payable - affiliates 1,139 375
Obligation related to acquisitions 500 500
Current portion of long-term debt 52,230 30,801
Accrued incentive plan expenses - current portion 6,569 8,374
Property, franchise and other taxes payable 3,824 6,316
Accrued interest 7,866 10,761
Total current liabilities 74,813 59,493
Deferred revenue 109,373 113,303
Accrued incentive plan expenses 6,883 11,670
Long-term debt 846,648 836,268
Partners' capital:    
Common units outstanding (106,027,836) 621,220 629,253
General partner's interest 10,354 10,517
Non-controlling interest 3,066 5,638
Accumulated other comprehensive loss (483) (493)
Total partners' capital 634,157 644,915
Total liabilities and partners' capital $ 1,671,874 $ 1,665,649