Summary Of Significant Accounting Policies (Allowance For Doubtful Accounts) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Jun. 30, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance as of the beginning of the year	$ 4,888	$ 44,309	$ 44,155
Additions expensed during the year	5,802	5,296	5,099
Net deductions (1)	(6,160)	(44,717)	(4,945)
Allowance as of the end of the year	$ 4,530	$ 4,888	$ 44,309
Corporate and Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Accounts Receivable, Net, Current				$ 24,500