Property, Plant and Equipment (Schedule of Recognized Impairments) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014		Dec. 31, 2013
Property Plant And Equipment [Line Items]
Impairment Expense		$ 2,493,156,000	$ 51,314,000		$ 21,587,000
United States [Member]
Property Plant And Equipment [Line Items]
Impairment Expense		328,982,000	14,267,000
Canada [Member]
Property Plant And Equipment [Line Items]
Impairment Expense	$ 37,047,000
Malaysia [Member]
Property Plant And Equipment [Line Items]
Impairment Expense		1,480,600,000
Conventional [Member] | Canada [Member]
Property Plant And Equipment [Line Items]
Impairment Expense		$ 683,574,000	$ 37,047,000	[1]	$ 21,587,000

[1] This amount represented the writeoff of goodwill associated with an oil and gas company acquired in 2000.