Allowance For Loan Losses And Credit Quality (Investment In Covered Loans And Non-Covered Loans By Credit Quality Indicator) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable	$ 7,478,306	$ 7,388,037
Non-Covered Loans [Member] | Residential - Prime [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk by payment status, Current	253,297	271,534
Credit risk by payment status, Past due greater than 30 days	5,629	7,065
Total loans receivable	258,926	278,599
Non-covered commercial loans, net	258,926	278,599
Non-Covered Loans [Member] | Residential - Subprime [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk by payment status, Current
Credit risk by payment status, Past due greater than 30 days
Total loans receivable
Discount
Non-covered commercial loans, net
Non-Covered Loans [Member] | Indirect Automobile [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk by payment status, Current	277,236	248,070
Credit risk by payment status, Past due greater than 30 days	1,550	2,385
Total loans receivable	278,786	250,455
Non-Covered Loans [Member] | Credit Card [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk by payment status, Current	45,297	46,786
Credit risk by payment status, Past due greater than 30 days	612	977
Total loans receivable	45,909	47,763
Non-Covered Loans [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk by payment status, Current	795,167	741,968
Credit risk by payment status, Past due greater than 30 days	8,852	8,774
Total loans receivable	804,019	750,742
Non-covered commercial loans, net	804,019	750,742
Non-Covered Loans [Member] | Consumer - Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk by payment status, Current	134,756	129,640
Credit risk by payment status, Past due greater than 30 days	936	1,119
Total loans receivable	135,692	130,759
Non-covered commercial loans, net	135,692	130,759
Commercial Loans [Member] | Covered Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	377,327	415,473
Commercial Loans [Member] | Covered Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	103,034	115,710
Commercial Loans [Member] | Covered Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	555,218	580,149
Commercial Loans [Member] | Covered Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	15,331	27,423
Commercial Loans [Member] | Covered Loans [Member] | Internally Assigned Grade [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	1,050,910	1,138,755
Total loans receivable	823,306	876,846
Discount	(227,604)	(261,909)
Commercial Loans [Member] | Covered Loans [Member] | Commercial Real Estate - Construction [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	54,451	59,936
Commercial Loans [Member] | Covered Loans [Member] | Commercial Real Estate - Construction [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	17,445	17,336
Commercial Loans [Member] | Covered Loans [Member] | Commercial Real Estate - Construction [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	149,054	169,726
Commercial Loans [Member] | Covered Loans [Member] | Commercial Real Estate - Construction [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	1,132	705
Commercial Loans [Member] | Covered Loans [Member] | Commercial Real Estate - Construction [Member] | Internally Assigned Grade [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	222,082	247,703
Commercial Loans [Member] | Covered Loans [Member] | Commercial Real Estate - Other [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	266,472	282,974
Commercial Loans [Member] | Covered Loans [Member] | Commercial Real Estate - Other [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	74,888	87,409
Commercial Loans [Member] | Covered Loans [Member] | Commercial Real Estate - Other [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	344,538	349,155
Commercial Loans [Member] | Covered Loans [Member] | Commercial Real Estate - Other [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	10,217	22,636
Commercial Loans [Member] | Covered Loans [Member] | Commercial Real Estate - Other [Member] | Internally Assigned Grade [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	696,115	742,174
Commercial Loans [Member] | Covered Loans [Member] | Commercial Business [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	56,404	72,563
Commercial Loans [Member] | Covered Loans [Member] | Commercial Business [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	10,701	10,965
Commercial Loans [Member] | Covered Loans [Member] | Commercial Business [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	61,626	61,268
Commercial Loans [Member] | Covered Loans [Member] | Commercial Business [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	3,982	4,082
Commercial Loans [Member] | Covered Loans [Member] | Commercial Business [Member] | Internally Assigned Grade [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	132,713	148,878
Commercial Loans [Member] | Non-Covered Loans [Member] | Commercial Real Estate - Construction [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	280,407	249,669
Commercial Loans [Member] | Non-Covered Loans [Member] | Commercial Real Estate - Construction [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	12,203	18,274
Commercial Loans [Member] | Non-Covered Loans [Member] | Commercial Real Estate - Construction [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	5,859	8,559
Commercial Loans [Member] | Non-Covered Loans [Member] | Commercial Real Estate - Construction [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	149	170
Commercial Loans [Member] | Non-Covered Loans [Member] | Commercial Real Estate - Construction [Member] | Internally Assigned Grade [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	298,618	276,672
Total loans receivable	298,618	276,672
Commercial Loans [Member] | Non-Covered Loans [Member] | Commercial Real Estate - Other [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	1,716,486	1,689,455
Commercial Loans [Member] | Non-Covered Loans [Member] | Commercial Real Estate - Other [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	64,603	62,868
Commercial Loans [Member] | Non-Covered Loans [Member] | Commercial Real Estate - Other [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	55,704	55,236
Commercial Loans [Member] | Non-Covered Loans [Member] | Commercial Real Estate - Other [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	5,906	5,697
Commercial Loans [Member] | Non-Covered Loans [Member] | Commercial Real Estate - Other [Member] | Internally Assigned Grade [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	1,842,699	1,813,256
Total loans receivable	1,842,699	1,813,256
Commercial Loans [Member] | Non-Covered Loans [Member] | Commercial Business [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	1,879,218	1,729,279
Commercial Loans [Member] | Non-Covered Loans [Member] | Commercial Business [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	27,653	46,225
Commercial Loans [Member] | Non-Covered Loans [Member] | Commercial Business [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	28,019	25,477
Commercial Loans [Member] | Non-Covered Loans [Member] | Commercial Business [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	199	199
Commercial Loans [Member] | Non-Covered Loans [Member] | Commercial Business [Member] | Internally Assigned Grade [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	1,935,089	1,801,180
Total loans receivable	1,935,089	1,801,180
Consumer Loans [Member] | Covered Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk by payment status, Current	191,659	199,121
Credit risk by payment status, Past due greater than 30 days	87,347	108,148
Total loans receivable	279,006	307,269
Discount	(51,123)	(65,940)
Consumer Loans [Member] | Covered Loans [Member] | Internally Assigned Grade [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable	227,883	241,329
Consumer Loans [Member] | Covered Loans [Member] | Indirect Automobile [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk by payment status, Current
Credit risk by payment status, Past due greater than 30 days
Total loans receivable
Consumer Loans [Member] | Covered Loans [Member] | Credit Card [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk by payment status, Current	824	875
Credit risk by payment status, Past due greater than 30 days	68	94
Total loans receivable	892	969
Consumer Loans [Member] | Covered Loans [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk by payment status, Current	188,028	193,366
Credit risk by payment status, Past due greater than 30 days	86,806	107,520
Total loans receivable	274,834	300,886
Consumer Loans [Member] | Covered Loans [Member] | Consumer - Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk by payment status, Current	2,807	4,880
Credit risk by payment status, Past due greater than 30 days	473	534
Total loans receivable	3,280	5,414
Mortgage [Member] | Covered Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk by payment status, Current	231,598	233,305
Credit risk by payment status, Past due greater than 30 days	83,187	94,553
Total loans receivable	314,785	327,858
Discount	(105,312)	(111,584)
Mortgage [Member] | Covered Loans [Member] | Internally Assigned Grade [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans receivable	209,473	216,274
Mortgage [Member] | Covered Loans [Member] | Residential - Prime [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk by payment status, Current	231,598	233,305
Credit risk by payment status, Past due greater than 30 days	83,187	94,553
Total loans receivable	314,785	327,858
Mortgage [Member] | Covered Loans [Member] | Residential - Subprime [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk by payment status, Current
Credit risk by payment status, Past due greater than 30 days
Total loans receivable
Acquired Loans From OMNI And Cameron [Member] | Non-Covered Loans [Member] | Commercial Real Estate - Construction [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	38,569	51,510
Acquired Loans From OMNI And Cameron [Member] | Non-Covered Loans [Member] | Commercial Real Estate - Construction [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	2,734	9,138
Acquired Loans From OMNI And Cameron [Member] | Non-Covered Loans [Member] | Commercial Real Estate - Construction [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	7,801	5,441
Acquired Loans From OMNI And Cameron [Member] | Non-Covered Loans [Member] | Commercial Real Estate - Construction [Member] | Internally Assigned Grade [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	49,104	66,089
Total loans receivable	44,494	59,631
Discount	(4,610)	(6,458)
Acquired Loans From OMNI And Cameron [Member] | Non-Covered Loans [Member] | Commercial Real Estate - Other [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	323,669	360,598
Acquired Loans From OMNI And Cameron [Member] | Non-Covered Loans [Member] | Commercial Real Estate - Other [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	49,854	53,503
Acquired Loans From OMNI And Cameron [Member] | Non-Covered Loans [Member] | Commercial Real Estate - Other [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	62,313	75,161
Acquired Loans From OMNI And Cameron [Member] | Non-Covered Loans [Member] | Commercial Real Estate - Other [Member] | Internally Assigned Grade [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	435,836	489,262
Total loans receivable	394,916	441,454
Discount	(40,920)	(47,808)
Acquired Loans From OMNI And Cameron [Member] | Non-Covered Loans [Member] | Commercial Business [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	86,606	94,760
Acquired Loans From OMNI And Cameron [Member] | Non-Covered Loans [Member] | Commercial Business [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	7,627	7,870
Acquired Loans From OMNI And Cameron [Member] | Non-Covered Loans [Member] | Commercial Business [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	2,508	4,057
Acquired Loans From OMNI And Cameron [Member] | Non-Covered Loans [Member] | Commercial Business [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	68
Acquired Loans From OMNI And Cameron [Member] | Non-Covered Loans [Member] | Commercial Business [Member] | Internally Assigned Grade [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit quality indicator by asset risk classification	96,809	106,687
Total loans receivable	85,421	95,316
Discount	(11,388)	(11,371)
Acquired Loans From OMNI And Cameron [Member] | Non-Covered Loans [Member] | Residential - Prime [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk by payment status, Current	4,031	4,145
Credit risk by payment status, Past due greater than 30 days	340	369
Total loans receivable	4,371	4,514
Discount	(294)
Non-covered commercial loans, net	4,077	4,514
Acquired Loans From OMNI And Cameron [Member] | Non-Covered Loans [Member] | Residential - Subprime [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk by payment status, Current
Credit risk by payment status, Past due greater than 30 days
Total loans receivable
Discount
Non-covered commercial loans, net
Acquired Loans From OMNI And Cameron [Member] | Non-Covered Loans [Member] | Indirect Automobile [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk by payment status, Current	9,000	10,813
Credit risk by payment status, Past due greater than 30 days	278	439
Total loans receivable	9,278	11,252
Discount		189
Non-covered commercial loans, net	9,278	11,441
Acquired Loans From OMNI And Cameron [Member] | Non-Covered Loans [Member] | Credit Card [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk by payment status, Current
Credit risk by payment status, Past due greater than 30 days
Total loans receivable
Discount
Non-covered commercial loans, net
Acquired Loans From OMNI And Cameron [Member] | Non-Covered Loans [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk by payment status, Current	63,465	73,822
Credit risk by payment status, Past due greater than 30 days	5,807	6,738
Total loans receivable	69,272	80,560
Discount	(1,802)	(4,839)
Non-covered commercial loans, net	67,470	75,721
Acquired Loans From OMNI And Cameron [Member] | Non-Covered Loans [Member] | Consumer - Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk by payment status, Current	18,909	16,067
Credit risk by payment status, Past due greater than 30 days	530	1,529
Total loans receivable	19,439	17,596
Discount	(7,189)	(1,511)
Non-covered commercial loans, net	$ 12,250	$ 16,085