Fair Value Disclosures (Summary Of Amount By Which Contractual Principal Exceeds Fair Value For Loans And Other Receivables Measured At Fair Value Under Fair Value Option) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Fair Value Disclosures [Abstract]
Loans and other receivables	$ 843,458	$ 408,369
Loans and other receivables on nonaccrual status	223,581	54,652
Long-term Debt	7,485	0
Loans and other receivables greater than 90 days past due	$ 19,100	$ 11,300