Intangible Assets (Schedule Of Indefinite-Lived And Definite-Lived Intangible Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Indefinite-Lived and Finite-Lived Intangible Assets By Major Class [Line Items]
Cost	$ 59,918	$ 55,509
Accumulated amortization	(12,945)	(10,005)
Net book value	46,973	45,504
Trade Names and Trademarks [Member]
Indefinite-Lived and Finite-Lived Intangible Assets By Major Class [Line Items]
Cost	800	800
Net book value	800	800
Software Under Development [Member]
Indefinite-Lived and Finite-Lived Intangible Assets By Major Class [Line Items]
Cost	13,049	23,254
Net book value	13,049	23,254
Customer Relationships [Member]
Indefinite-Lived and Finite-Lived Intangible Assets By Major Class [Line Items]
Cost	22,800	19,500
Accumulated amortization	(7,097)	(5,119)
Net book value	15,703	14,381
Software Assets [Member]
Indefinite-Lived and Finite-Lived Intangible Assets By Major Class [Line Items]
Cost	23,269	11,955
Accumulated amortization	(5,848)	(4,886)
Net book value	$ 17,421	$ 7,069