Lease Agreements (Schedule Of Future Minimum Lease Payments Under Non-Cancelable Operating Leases) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Operating Leased Assets [Line Items]
2013	$ 34,388
2014	30,543
2015	26,424
2016	22,574
2017	19,688
Thereafter	76,271
Total minimum lease payments	209,888
Ground Lease [Member]
Operating Leased Assets [Line Items]
2013	3,218
2014	2,130
2015	1,094
2016	1,128
2017	1,223
Thereafter	15,248
Total minimum lease payments	24,041
Premises Lease [Member]
Operating Leased Assets [Line Items]
2013	28,477
2014	25,720
2015	22,637
2016	18,753
2017	15,772
Thereafter	61,023
Total minimum lease payments	172,382
Equipment Lease [Member]
Operating Leased Assets [Line Items]
2013	2,693
2014	2,693
2015	2,693
2016	2,693
2017	2,693
Total minimum lease payments	$ 13,465