Contingencies And Contractual Commitments (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	$ 164,600,000	$ 122,000,000	$ 89,400,000
Transportation and Storage Contracts, Fiscal Year Maturity
Next Twelve Months	157,931,000
Year Two	129,928,000
Year Three	118,504,000
Year Four	101,166,000
Year Five	92,920,000
Thereafter	586,271,000
Total	$ 1,186,720,000