Income Taxes (Schedule Of Valuation Allowance Activity) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Balance at beginning of year	$ 95,721	$ 26,312
(Credited) / charged to income	74,157	(614)	(1,800)
Translation adjustment	(800)	(746)	(52)
Changes attributable to movement in underlying assets	1,953	(4,541)	2,655
Balance at end of year	$ 20,411	$ 95,721	$ 25,509