Cash Flow Disclosures (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Cash Flow Disclosures [Abstract]
Decrease (increase) in accounts receivable	$ 29,586	$ (75,735)
Increase in inventories	(3,326)	(51,279)
Increase in prepaid expenses	(2,235)	(52,793)
Decrease in deferred income tax assets	1,290	40,145
Increase (decrease) in accounts payable and accrued liabilities	59,369	(84,344)
Increase (decrease) in current income tax liabilities	(77,744)	199,461
Total	6,940	(24,545)	[1]
Cash income taxes paid	438,309	414,676
Interest paid, net of amounts capitalized	$ 44,657	$ 1,077

[1] Reclassified to conform to current presentation - See Note D.