Condensed Consolidated Statements Of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash Flows from Operating Activities
Net income	$ 1,876	$ 701
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,935	2,395
Gain on sale of joint venture interest	(4,055)
Loss on sale of assets	48
Share based compensation	353	290
Equity in earnings of joint ventures	(437)	(124)
Changes in operating assets and liabilities:
Restricted cash	1,454	(678)
Receivables, net	(7,984)	(5,352)
Inventory	(3,236)	(2,545)
Prepaid expenses	(409)	318
Refundable income taxes	120	126
Accounts payable	(1,880)	3,051
Accounts payable to affiliate, net	(1,380)	2,079
Accrued expenses	904	132
Change in derivatives	1,131	(1,550)
Deferred credit	(150)	(156)
Accrued retirement health and life insurance benefits and other noncurrent liabilities	(261)	(67)
Other		831
Net cash used in operating activities	(10,971)	(549)
Cash Flows from Investing Activities
Proceeds from sale of joint venture interest	9,103
Additions to property and equipment	(484)	(5,010)
Proceeds from the disposition of property and equipment	2,232
Investment in and advances to unconsolidated subsidiaries	(500)
Net cash provided by (used in) investing activities	10,351	(5,010)
Cash Flows from Financing Activities
Principal payments on long-term debt	(413)	(176)
Proceeds from revolving credit facility	43,756	86,056
Principal payments on revolving credit facility	(43,106)	(80,144)
Exercise of stock options		64
Net cash provided by financing activities	237	5,800
Increase (decrease) in cash and cash equivalents	(383)	241
Cash and cash equivalents, beginning of year	383	472
Cash and cash equivalents, end of period		$ 713