Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2014

Revision of Prior Period Amounts [Abstract]

Schedule of Prior Period Adjustments [Table Text Block]

As detailed below, these revisions impacted the following consolidated cash flow items:



	Year Ended December 31, 2013								Year Ended December 31, 2012
	As								As
	Previously					As			Previously					As
(in thousands)	Reported			Revision		Revised			Reported			Revision		Revised
Cash Flows from Operating Activities
Increase (Decrease) in Accounts Payable and Accrued Liabilities	$	37,926		(17,636	)	$	20,290		$	(34,224	)	6,693		$	(27,531	)
Net Cash Provided by Operating Activities	327,864			(17,636	)	310,228			477,214			6,693		483,907

Cash Flows from Investing Activities
Purchases of Property, Plant and Equipment	(224,093		)	17,636		(206,457		)	(217,995		)	(6,693	)	(224,688		)
Net Cash Used in Investing Activities	(25,401		)	17,636		(7,765		)	(228,043		)	(6,693	)	(234,736		)

- Definition

Tabular disclosure of prior period adjustments to previously issued financial statements including (1) the effect of the correction on each financial statement line item and any per-share amounts affected for each prior period presented (2) the cumulative effect of the change on retained earnings or other appropriate components of equity or net assets in the statement of financial position, as of the beginning of the earliest period presented, and (3) the effect of the prior period adjustments (both gross and net of applicable income tax) on the net income of each prior period presented in the entity's annual report for the year in which the adjustments are made.

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