Credit Quality (Summary Of Non-performing Assets) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2011	Dec. 31, 2010
Credit Quality
Non-accrual loans	$ 107,091	$ 115,589
Restructured loans	20,146	19,705
Total non-performing loans	127,237	135,294
Other real estate owned (OREO)	35,793	32,702
Total non-performing loans and OREO	163,030	167,996
Non-performing investments	6,605	5,974
Total non-performing assets	$ 169,635	$ 173,970
Non-performing loans as a percent of total loans	1.90%	2.22%
Non-performing loans + OREO as a percent of total loans + OREO	2.42%	2.74%
Non-performing assets as a percent of total assets	1.72%	1.94%