CONDENSED CONSOLIDATED STATEMENTS OF FINANCIAL POSITION (UNAUDITED) (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Property, plant and equipment, accumulated depreciation and amortization	$ 1,319,710	$ 1,269,810
Intangible assets, accumulated amortization	20,801	18,397
Deferred financing fees, accumulated amortization	$ 14,390	$ 17,838
Common stock, par value	$ 0	$ 0
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	52,471,354	52,248,514
Common stock, shares outstanding	52,471,354	52,248,514