Investments In Non-Consolidated Subsidiaries (Balance Sheet Disclosure) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013 White Cliffs Pipeline, LLC [Member]	Dec. 31, 2012 White Cliffs Pipeline, LLC [Member]	Sep. 30, 2013 Ngl Energy Partners Lp [Member]	Sep. 30, 2012 Ngl Energy Partners Lp [Member]
Current assets	$ 98,457	$ 21,508	$ 1,013,859	$ 736,297
Property, plant and equipment, net	312,831	210,710	631,663	425,641
Goodwill	17,000	17,000	840,287	515,881
Other intangible assets, net	20,802	26,369	540,684	351,600
Total assets	449,090	275,587	3,026,493	2,029,419
Current liabilities	9,648	3,412	800,658	653,101
Long-term debt			906,066	569,903
Other noncurrent liabilities			2,673	2,599
Members’ equity	439,442	272,175	1,317,096	803,816
Total liabilities and members’ equity	$ 449,090	$ 275,587	$ 3,026,493	$ 2,029,419