Loans And Allowance For Loan Losses (Summary Of Age Analysis Of Past Due Loans) (Details) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Mortgage Loans on Real Estate [Line Items]
30-89 days past due	$ 42,507	$ 41,071
Greater than 90 days past due	99,823	122,477
Total past due	142,330	163,548
Current	10,959,939	4,793,616
Total Loans	11,102,269	4,957,164
Recorded investment > 90 days and accruing	1,638	1,492
Commercial - Originated [Member]
Mortgage Loans on Real Estate [Line Items]
30-89 days past due	15,862
Greater than 90 days past due	35,372
Total past due	51,234
Current	3,054,009
Total Loans	3,105,243
Recorded investment > 90 days and accruing	326
Commercial [Member]
Mortgage Loans on Real Estate [Line Items]
30-89 days past due		12,463
Greater than 90 days past due		41,967
Total past due		54,430
Current		2,706,363
Total Loans		2,760,793
Recorded investment > 90 days and accruing		300
Commercial - Restructured [Member]
Mortgage Loans on Real Estate [Line Items]
30-89 days past due
Greater than 90 days past due	4,410	8,712
Total past due	4,410	8,712
Current	9,638	3,929
Total Loans	14,048	12,641
Recorded investment > 90 days and accruing
Commercial - Acquired [Member]
Mortgage Loans on Real Estate [Line Items]
30-89 days past due
Greater than 90 days past due
Total past due
Current	4,653,996
Total Loans	4,653,996
Recorded investment > 90 days and accruing
Commercial - Covered [Member]
Mortgage Loans on Real Estate [Line Items]
30-89 days past due
Greater than 90 days past due	32,869	41,917
Total past due	32,869	41,917
Current	269,091	332,414
Total Loans	301,960	374,331
Recorded investment > 90 days and accruing
Residential Mortgages [Member]
Mortgage Loans on Real Estate [Line Items]
30-89 days past due		22,109
Greater than 90 days past due		19,573
Total past due		41,682
Current		324,502
Total Loans		366,184
Recorded investment > 90 days and accruing		874
Residential Mortgages - Originated [Member]
Mortgage Loans on Real Estate [Line Items]
30-89 days past due	16,563
Greater than 90 days past due	19,453
Total past due	36,016
Current	376,251
Total Loans	412,267
Recorded investment > 90 days and accruing	52
Residential Mortgages - Acquired [Member]
Mortgage Loans on Real Estate [Line Items]
30-89 days past due
Greater than 90 days past due
Total past due
Current	776,993
Total Loans	776,993
Recorded investment > 90 days and accruing
Residential Mortgages - Covered [Member]
Mortgage Loans on Real Estate [Line Items]
30-89 days past due
Greater than 90 days past due	1,237	3,199
Total past due	1,237	3,199
Current	261,009	290,306
Total Loans	262,246	293,505
Recorded investment > 90 days and accruing
Indirect Consumer - Originated [Member]
Mortgage Loans on Real Estate [Line Items]
30-89 days past due
Greater than 90 days past due
Total past due
Current	286,968
Total Loans	286,968
Recorded investment > 90 days and accruing
Indirect Consumer [Member]
Mortgage Loans on Real Estate [Line Items]
30-89 days past due
Greater than 90 days past due
Total past due
Current		309,454
Total Loans		309,454
Recorded investment > 90 days and accruing
Direct Consumer [Member]
Mortgage Loans on Real Estate [Line Items]
30-89 days past due		4,488
Greater than 90 days past due		5,180
Total past due		9,668
Current		588,279
Total Loans		597,947
Recorded investment > 90 days and accruing		318
Direct Consumer - Originated [Member]
Mortgage Loans on Real Estate [Line Items]
30-89 days past due	2,330
Greater than 90 days past due	2,718
Total past due	5,048
Current	613,029
Total Loans	618,077
Recorded investment > 90 days and accruing	153
Direct Consumer - Acquired [Member]
Mortgage Loans on Real Estate [Line Items]
30-89 days past due	2,833
Greater than 90 days past due	2,168
Total past due	5,001
Current	411,728
Total Loans	416,729
Recorded investment > 90 days and accruing	1,107
Direct Consumer - Covered [Member]
Mortgage Loans on Real Estate [Line Items]
30-89 days past due
Greater than 90 days past due		170
Total past due		170
Current	157,625	141,145
Total Loans	157,625	141,315
Recorded investment > 90 days and accruing
Finance Company [Member]
Mortgage Loans on Real Estate [Line Items]
30-89 days past due	4,919	2,011
Greater than 90 days past due	1,596	1,759
Total past due	6,515	3,770
Current	89,602	97,224
Total Loans	96,117	100,994
Recorded investment > 90 days and accruing