CONDENSED CONSOLIDATED STATEMENTS OF FINANCIAL POSITION (UNAUDITED) (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Property, plant and equipment, accumulated depreciation and amortization	$ 1,512,637	$ 1,487,713
Intangible assets, accumulated amortization	29,073	28,242
Deferred financing fees, accumulated amortization	$ 1,469	$ 1,277
Common stock, par value	$ 0	$ 0
Common stock, shares authorized	300,000,000	300,000,000
Common stock, shares issued	152,766,017	152,699,077
Common stock, shares outstanding	152,766,017	152,699,077