Supplementary Balance Sheet Detail (Schedule Of Analysis Of The Allowance For Doubtful Accounts) (Details) - USD ($) $ in Thousands	5 Months Ended	7 Months Ended	12 Months Ended
	Dec. 31, 2015	Aug. 14, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at beginning of year	$ 6,314	$ 7,471	$ 6,718	$ 7,573
Additions	304	1,156	8,675	2,914
Deductions	0	(2,313)	(7,922)	(3,769)
Balance at end of year	$ 304	$ 6,314	$ 7,471	$ 6,718