Intangible Assets (Schedule Of Indefinite-Lived And Definite-Lived Intangible Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Indefinite-Lived and Finite-Lived Intangible Assets By Major Class [Line Items]
Cost	$ 317,355	$ 297,940
Accumulated amortization	(71,733)	(36,846)
Net book value	245,622	261,094
Trade Names and Trademarks [Member]
Indefinite-Lived and Finite-Lived Intangible Assets By Major Class [Line Items]
Cost	53,409	53,566
Accumulated amortization	(1,201)	(461)
Net book value	52,208	53,105
Customer Relationships [Member]
Indefinite-Lived and Finite-Lived Intangible Assets By Major Class [Line Items]
Cost	124,986	125,234
Accumulated amortization	(22,010)	(9,487)
Net book value	102,976	115,747
Software Assets [Member]
Indefinite-Lived and Finite-Lived Intangible Assets By Major Class [Line Items]
Cost	127,320	110,201
Accumulated amortization	(48,522)	(26,898)
Net book value	78,798	83,303
Software Under Development [Member]
Indefinite-Lived and Finite-Lived Intangible Assets By Major Class [Line Items]
Cost	11,640	8,939
Net book value	$ 11,640	$ 8,939