Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Current Assets
Cash and cash equivalents		$ 383
Restricted cash	2,757	7,605
Receivables (less allowance for doubtful accounts: June 30, 2012 - $12; December 31, 2011 - $63)	35,364	27,804
Inventory	36,525	31,082
Prepaid expenses	1,087	958
Derivative assets		1,304
Deferred income taxes	5,286	6,056
Refundable income taxes	514	566
Assets held for sale		2,300
Total current assets	81,533	78,058
Property and equipment	190,367	185,386
Less accumulated depreciation and amortization	(113,952)	(108,307)
Property and equipment, net	76,415	77,079
Investment in joint ventures	7,889	12,147
Other assets	1,675	1,873
Total assets	167,512	169,157
Current Liabilities
Current maturities of long-term debt	1,697	1,670
Revolving credit facility	23,380	21,142
Accounts payable	22,423	22,704
Accounts payable to affiliate, net	4,611	6,167
Accrued expenses	5,165	4,023
Derivative liabilities	1,764	3,465
Total current liabilities	59,040	59,171
Long-term debt, less current maturities	5,996	6,852
Deferred credit	3,896	4,195
Accrued retirement health and life insurance benefits	6,517	6,309
Other non current liabilities	1,715	2,144
Deferred income taxes	5,286	6,056
Total liabilities	82,450	84,727
Preferred, 5% non-cumulative; $10 par value; authorized 1,000 shares; issued and outstanding 437 shares	4	4
Common stock
No par value; authorized 40,000,000 shares; issued 18,115,965 and 19,530,344 shares at June 30, 2012 and December 31, 2011, respectively; 17,973,065 and 18,115,965 shares outstanding at June 30, 2012 and December 31, 2011, respectively	6,715	6,715
Additional paid-in capital	7,344	6,925
Retained earnings	71,933	78,953
Accumulated other comprehensive income (loss)	(850)	(1,035)
Treasury stock, at cost
Common; 142,900 and 1,414,379 shares at June 30, 2012 and December 31, 2011, respectively	(84)	(7,132)
Total stockholders’ equity	85,062	84,430
Total liabilities and stockholders’ equity	$ 167,512	$ 169,157