Income Taxes (Federal Statutory Income Tax Rate To Income Before Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Income from continuing operations before income taxes	$ 425,572	$ 109,047	$ 84,849
Partnership income not subject to tax	(418,500)	(104,751)	(85,567)
Income (loss) subject to income taxes	7,072	4,296	(718)
Tax expense (benefit) at federal statutory rate	2,475	1,504	(251)
State income taxes, net of federal tax	928	992	660
Effects of unrecognized tax positions, federal and state	0	0	0
Return to provision, federal and state	(193)	(232)	88
Other	777	581	348
Total income tax expense from continuing operations (1)	$ 3,987	$ 2,845	$ 845	[1]
Effective Income Tax Rate Reconciliation, Percent	1.00%	3.00%	1.00%

[1] (1)Our discontinued operations had no income tax benefit or expense in any period presented.