Intangible Assets (Schedule Of Indefinite-Lived And Definite-Lived Intangible Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Indefinite-Lived and Finite-Lived Intangible Assets By Major Class [Line Items]
Cost	$ 92,861	$ 86,542
Accumulated amortization	(17,874)	(14,238)
Net book value	74,987	72,304
Trade Names and Trademarks [Member]
Indefinite-Lived and Finite-Lived Intangible Assets By Major Class [Line Items]
Cost	5,643	5,585
Accumulated amortization	(151)	(50)
Net book value	5,492	5,535
Software Under Development [Member]
Indefinite-Lived and Finite-Lived Intangible Assets By Major Class [Line Items]
Cost	12,581	18,773
Net book value	12,581	18,773
Customer Relationships [Member]
Indefinite-Lived and Finite-Lived Intangible Assets By Major Class [Line Items]
Cost	25,773	25,618
Accumulated amortization	(1,722)	(1,072)
Net book value	24,051	24,546
Software Assets [Member]
Indefinite-Lived and Finite-Lived Intangible Assets By Major Class [Line Items]
Cost	48,864	36,566
Accumulated amortization	(16,001)	(13,116)
Net book value	$ 32,863	$ 23,450