Deposits (Maturities Of Time Open And Certificates Of Deposit Detailed Breakdown By Size Category) (Details) (USD $)	Dec. 31, 2012
Deposits [Abstract]
Certificates Of Deposit under $100,000, Due in 3 months or less	$ 175,548,000
Certificates Of Deposit under $100,000, Due in over 3 through 6 months	210,490,000
Certificates Of Deposit under $100,000, Due in over 6 through 12 months	335,213,000
Certificates Of Deposit under $100,000, Due in over 12 months	139,625,000
Certificates Of Deposit under $100,000	860,876,000
Other Time Deposits under $100,000, Due in 3 months or less	33,383,000
Other Time Deposits under $100,000, Due in over 3 through 6 months	41,118,000
Other Time Deposits under $100,000, Due in over 6 through 12 months	54,523,000
Other Time Deposits under $100,000, Due in over 12 months	84,718,000
Other Time Deposits under $100,000	213,742,000
Certificates Of Deposit over $100,000, Due in 3 months or less	351,136,000
Certificates Of Deposit over $100,000, Due in over 3 through 6 months	195,824,000
Certificates Of Deposit over $100,000, Due in over 6 through 12 months	228,622,000
Certificates Of Deposit over $100,000, Due in over 12 months	216,623,000
Certificates Of Deposit over $100,000	992,205,000
Other Time Deposits over $100,000, Due in 3 months or less	24,735,000
Other Time Deposits over $100,000, Due in over 3 through 6 months	35,488,000
Other Time Deposits over $100,000, Due in over 6 through 12 months	82,007,000
Other Time Deposits other $100,000, Due in over 12 months	21,754,000
Other Time Deposits over $100,000	163,984,000
Due in 3 months or less, Total	584,802,000
Due in over 3 through 6 months, Total	482,920,000
Due in over 6 through 12 months, Total	700,365,000
Due in over 12 months, Total	462,720,000
Total	2,230,807,000
Minimum reserve requirement	$ 61,100,000