Consolidated Statements of Cash Flows (Unaudited) (Parentheticals) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Accrued vendor invoices excluded from the purchase of property, plant, and equipment and the change in accounts payable and accrued expenses	$ 4,273	$ 3,872
Depreciation expense	$ 4,760	$ 3,356