Loans And Allowance For Loan Losses (Schedule Of Credit Risk Profile By Internally Assigned Grade) (Details) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Pass [Member] | Residential Mortgages - Originated [Member]
Credit Risk Profile By Internally Assigned Grade	$ 277,441	$ 284,712
Pass-Watch [Member] | Residential Mortgages - Originated [Member]
Credit Risk Profile By Internally Assigned Grade	6,010	7,857
Special Mention [Member] | Residential Mortgages - Originated [Member]
Credit Risk Profile By Internally Assigned Grade	546
Substandard [Member] | Residential Mortgages - Originated [Member]
Credit Risk Profile By Internally Assigned Grade	81,664	73,615
Residential Mortgages - Originated [Member]
Credit Risk Profile By Internally Assigned Grade	365,661	366,184
Pass [Member] | Residential Mortgages - Acquired [Member]
Credit Risk Profile By Internally Assigned Grade	745,537
Special Mention [Member] | Residential Mortgages - Acquired [Member]
Credit Risk Profile By Internally Assigned Grade	9,856
Substandard [Member] | Residential Mortgages - Acquired [Member]
Credit Risk Profile By Internally Assigned Grade	73,419
Doubtful [Member] | Residential Mortgages - Acquired [Member]
Credit Risk Profile By Internally Assigned Grade	1,824
Loss [Member] | Residential Mortgages - Acquired [Member]
Credit Risk Profile By Internally Assigned Grade	31
Residential Mortgages - Acquired [Member]
Credit Risk Profile By Internally Assigned Grade	830,667
Pass [Member] | Residential Mortgages - Covered [Member]
Credit Risk Profile By Internally Assigned Grade	112,434	159,885
Pass-Watch [Member] | Residential Mortgages - Covered [Member]
Credit Risk Profile By Internally Assigned Grade	21,699	29,673
Special Mention [Member] | Residential Mortgages - Covered [Member]
Credit Risk Profile By Internally Assigned Grade	8,156	15,220
Substandard [Member] | Residential Mortgages - Covered [Member]
Credit Risk Profile By Internally Assigned Grade	96,375	87,636
Doubtful [Member] | Residential Mortgages - Covered [Member]
Credit Risk Profile By Internally Assigned Grade	8,825	1,091
Residential Mortgages - Covered [Member]
Credit Risk Profile By Internally Assigned Grade	247,489	293,505
Pass [Member] | Total Residential Mortgages [Member]
Credit Risk Profile By Internally Assigned Grade	1,135,412	444,597
Pass-Watch [Member] | Total Residential Mortgages [Member]
Credit Risk Profile By Internally Assigned Grade	27,709	37,530
Special Mention [Member] | Total Residential Mortgages [Member]
Credit Risk Profile By Internally Assigned Grade	18,558	15,220
Substandard [Member] | Total Residential Mortgages [Member]
Credit Risk Profile By Internally Assigned Grade	251,458	161,251
Doubtful [Member] | Total Residential Mortgages [Member]
Credit Risk Profile By Internally Assigned Grade	10,649	1,091
Loss [Member] | Total Residential Mortgages [Member]
Credit Risk Profile By Internally Assigned Grade	31
Total Residential Mortgages [Member]
Credit Risk Profile By Internally Assigned Grade	$ 1,443,817	$ 659,689