Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Variable Interest Entities (Schedule Of Maximum Exposure To Loss In VIEs) (Details)

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Variable Interest Entities (Schedule Of Maximum Exposure To Loss In VIEs) (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Variable Interest Entities [Abstract]    
Carrying value of investments (Note 11) $ 114,711 $ 115,554
Carrying value of the ALS Notes Receivable 85,747 79,254
Debt guarantee 248,105 267,260
Maximum exposure to loss $ 448,563 $ 462,068