Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current Assets
Cash and cash equivalents		$ 383
Restricted cash	6,151	7,605
Receivables (less allowance for doubtful accounts: March 31, 2012 - $12; December 31, 2011 - $63)	35,788	27,804
Inventory	34,318	31,082
Prepaid expenses	1,367	958
Derivative assets		1,304
Deferred income taxes	6,802	6,056
Refundable income taxes	446	566
Assets held for sale		2,300
Total current assets	84,872	78,058
Property and equipment	186,036	185,386
Less accumulated depreciation and amortization	(111,143)	(108,307)
Property and equipment, net	74,893	77,079
Investment in joint ventures	8,049	12,147
Other assets	1,774	1,873
Total assets	169,588	169,157
Current Liabilities
Current maturities of long-term debt	1,684	1,670
Revolving credit facility	21,792	21,142
Accounts payable	20,970	22,704
Accounts payable to affiliate, net	4,787	6,167
Accrued expenses	5,841	4,023
Derivative liabilities	3,165	3,465
Total current liabilities	58,239	59,171
Long-term debt, less current maturities	6,425	6,852
Deferred credit	4,045	4,195
Accrued retirement health and life insurance benefits	6,415	6,309
Other non current liabilities	1,744	2,144
Deferred income taxes	6,802	6,056
Total liabilities	83,670	84,727
Preferred, 5% non-cumulative; $10 par value; authorized 1,000 shares; issued and outstanding 437 shares	4	4
No par value; authorized 40,000,000 shares; issued 18,115,965 and 19,530,344 shares at March 31, 2012 and December 31, 2011, respectively; 18,115,965 shares outstanding at March 31, 2012 and December 31, 2011, respectively	6,715	6,715
Additional paid-in capital	7,278	6,925
Retained earnings	72,783	78,953
Accumulated other comprehensive income (loss)	(862)	(1,035)
Treasury stock, at cost
Common; 0 and 1,414,379 shares at March 31, 2012 and December 31, 2011, respectively		(7,132)
Total stockholders’ equity	85,918	84,430
Total liabilities and stockholders’ equity	$ 169,588	$ 169,157