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Commitments And Contingencies (Schedule Of Future Minimum Lease Payments Under Non-Cancelable Operating Leases) (Details)
$ in Thousands
Dec. 31, 2016
USD ($)
Operating Leased Assets [Line Items]  
2017 $ 31,335
2018 27,148
2019 24,776
2020 18,136
2021 14,348
Thereafter 126,677
Total minimum lease payments 242,420
Ground Lease [Member]  
Operating Leased Assets [Line Items]  
2017 3,621
2018 3,629
2019 3,691
2020 1,419
2021 1,357
Thereafter 9,981
Total minimum lease payments 23,698
Premises Lease [Member]  
Operating Leased Assets [Line Items]  
2017 25,049
2018 23,519
2019 21,085
2020 16,717
2021 12,991
Thereafter 116,696
Total minimum lease payments 216,057
Equipment Lease [Member]  
Operating Leased Assets [Line Items]  
2017 2,665
Total minimum lease payments $ 2,665