Loans (Details 2) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2010
Summary of loans by portfolio type
More than 90 days Past Due and Accruing			$ 36,900
Nonaccrual Loans			98,900
Commercial and Industrial [Member] | Legacy Loans [Member]
Summary of loans by portfolio type
Days Past Due 30 to 59	3,415	5,280
Days Past Due 60 to 89	6,346	7,592
Days Past Due more than 90	3,102	12,553
Total Past Due	12,863	25,425
Current	2,402,784	1,960,404
Total Loans	2,415,647	1,985,829
More than 90 days Past Due and Accruing	202	4,692
Nonaccrual Loans	5,168	8,368
Commercial and Industrial [Member] | Acquired Loans (Noncovered) [Member]
Summary of loans by portfolio type
Days Past Due 30 to 59	177	1,939
Days Past Due 60 to 89	169	511
Days Past Due more than 90	68	703
Total Past Due	414	3,153
Current	53,807	92,995
Total Loans	54,221	96,148
More than 90 days Past Due and Accruing	0	703
Nonaccrual Loans	68	0
Commercial and Industrial [Member] | Covered Loans [Member]
Summary of loans by portfolio type
Days Past Due 30 to 59	4,969	5,509
Days Past Due 60 to 89	7,569	2,911
Days Past Due more than 90	39,501	70,588
Total Past Due	52,039	79,008
Current	184,482	180,186
Total Loans	236,521	259,194
Commercial Real Estate Other Receivable [Member] | Legacy Loans [Member]
Summary of loans by portfolio type
Days Past Due 30 to 59	8,286	10,801
Days Past Due 60 to 89	4,848	3,832
Days Past Due more than 90	42,535	58,977
Total Past Due	55,669	73,610
Current	1,917,646	1,953,710
Total Loans	1,973,315	2,027,320
More than 90 days Past Due and Accruing	1,900	1,908
Nonaccrual Loans	47,164	65,096
Commercial Real Estate Other Receivable [Member] | Acquired Loans (Noncovered) [Member]
Summary of loans by portfolio type
Days Past Due 30 to 59	4,110	493
Days Past Due 60 to 89	309	16,650
Days Past Due more than 90	3,676	38
Total Past Due	8,095	17,181
Current	103,648	123,860
Total Loans	111,743	141,041
More than 90 days Past Due and Accruing	2,883	38
Nonaccrual Loans	793	0
Commercial Real Estate Other Receivable [Member] | Covered Loans [Member]
Summary of loans by portfolio type
Days Past Due 30 to 59	27,684	29,241
Days Past Due 60 to 89	35,750	16,761
Days Past Due more than 90	205,958	208,820
Total Past Due	269,392	254,822
Current	660,039	763,393
Total Loans	929,431	1,018,215
Commercial Construction [Member] | Legacy Loans [Member]
Summary of loans by portfolio type
Days Past Due 30 to 59	529	1,490
Days Past Due 60 to 89	2,091	1,777
Days Past Due more than 90	10,150	18,639
Total Past Due	12,770	21,906
Current	240,609	255,253
Total Loans	253,379	277,159
More than 90 days Past Due and Accruing	31	2,795
Nonaccrual Loans	10,495	16,364
Commercial Construction [Member] | Acquired Loans (Noncovered) [Member]
Summary of loans by portfolio type
Total Loans	0	0
Commercial Construction [Member] | Covered Loans [Member]
Summary of loans by portfolio type
Days Past Due 30 to 59	139	2,179
Days Past Due 60 to 89	673	2,458
Days Past Due more than 90	73,265	83,969
Total Past Due	74,077	88,606
Current	27,841	28,564
Total Loans	101,918	117,170
Commercial Leases [Member] | Legacy Loans [Member]
Summary of loans by portfolio type
Days Past Due 30 to 59	0	0
Days Past Due 60 to 89	0	0
Days Past Due more than 90	0	0
Total Past Due	0	0
Current	57,634	63,004
Total Loans	57,634	63,004
More than 90 days Past Due and Accruing	0	0
Nonaccrual Loans	0	0
Commercial Leases [Member] | Acquired Loans (Noncovered) [Member]
Summary of loans by portfolio type
Total Loans	0	0
Commercial Leases [Member] | Covered Loans [Member]
Summary of loans by portfolio type
Total Loans	0	0
Consumer Installment [Member] | Legacy Loans [Member]
Summary of loans by portfolio type
Days Past Due 30 to 59	9,636	14,486
Days Past Due 60 to 89	3,243	4,491
Days Past Due more than 90	5,055	7,059
Total Past Due	17,934	26,036
Current	1,238,299	1,279,307
Total Loans	1,256,233	1,305,343
More than 90 days Past Due and Accruing	739	1,929
Nonaccrual Loans	787	3,724
Consumer Installment [Member] | Acquired Loans (Noncovered) [Member]
Summary of loans by portfolio type
Days Past Due 30 to 59	3	40
Days Past Due 60 to 89	70	16
Days Past Due more than 90	15	23
Total Past Due	88	79
Current	2,751	3,438
Total Loans	2,839	3,517
More than 90 days Past Due and Accruing	15	23
Nonaccrual Loans	0	0
Consumer Installment [Member] | Covered Loans [Member]
Summary of loans by portfolio type
Days Past Due 30 to 59	41	667
Days Past Due 60 to 89	33	493
Days Past Due more than 90	2,074	36
Total Past Due	2,148	1,196
Current	9,379	10,327
Total Loans	11,527	11,523
Consumer Home Equity Lines [Member] | Legacy Loans [Member]
Summary of loans by portfolio type
Days Past Due 30 to 59	2,086	2,500
Days Past Due 60 to 89	835	755
Days Past Due more than 90	571	744
Total Past Due	3,492	3,999
Current	713,297	722,351
Total Loans	716,789	726,350
More than 90 days Past Due and Accruing	571	744
Nonaccrual Loans	938	72
Consumer Home Equity Lines [Member] | Acquired Loans (Noncovered) [Member]
Summary of loans by portfolio type
Days Past Due 30 to 59	140	105
Days Past Due 60 to 89	0	24
Days Past Due more than 90	19	46
Total Past Due	159	175
Current	21,771	22,853
Total Loans	21,930	23,028
More than 90 days Past Due and Accruing	19	46
Nonaccrual Loans	0	0
Consumer Home Equity Lines [Member] | Covered Loans [Member]
Summary of loans by portfolio type
Days Past Due 30 to 59	1,174	1,476
Days Past Due 60 to 89	1,428	738
Days Past Due more than 90	403	443
Total Past Due	3,005	2,657
Current	148,961	183,277
Total Loans	151,966	185,934
Consumer Credit Card [Member] | Legacy Loans [Member]
Summary of loans by portfolio type
Days Past Due 30 to 59	915	1,570
Days Past Due 60 to 89	496	975
Days Past Due more than 90	797	1,337
Total Past Due	2,208	3,882
Current	141,620	145,624
Total Loans	143,828	149,506
More than 90 days Past Due and Accruing	349	371
Nonaccrual Loans	563	966
Consumer Credit Card [Member] | Acquired Loans (Noncovered) [Member]
Summary of loans by portfolio type
Days Past Due 30 to 59	0	0
Days Past Due 60 to 89	0	0
Days Past Due more than 90	0	0
Current	0	0
Total Loans	0	0
Consumer Credit Card [Member] | Covered Loans [Member]
Summary of loans by portfolio type
Days Past Due 30 to 59	0	0
Days Past Due 60 to 89	0	0
Days Past Due more than 90	0	0
Current	0	0
Total Loans	0	0
Consumer Residential Mortgages [Member] | Legacy Loans [Member]
Summary of loans by portfolio type
Days Past Due 30 to 59	9,559	10,574
Days Past Due 60 to 89	1,560	1,665
Days Past Due more than 90	8,129	14,815
Total Past Due	19,248	27,054
Current	379,942	375,022
Total Loans	399,190	402,076
More than 90 days Past Due and Accruing	3,715	8,768
Nonaccrual Loans	6,663	10,004
Consumer Residential Mortgages [Member] | Acquired Loans (Noncovered) [Member]
Summary of loans by portfolio type
Days Past Due 30 to 59	62	65
Days Past Due 60 to 89	0	0
Days Past Due more than 90	0	0
Total Past Due	62	65
Current	1,409	1,702
Total Loans	1,471	1,767
More than 90 days Past Due and Accruing	0	0
Nonaccrual Loans	0	93
Consumer Residential Mortgages [Member] | Covered Loans [Member]
Summary of loans by portfolio type
Days Past Due 30 to 59	17,105	14,975
Days Past Due 60 to 89	1,278	3,625
Days Past Due more than 90	9,809	12,320
Total Past Due	28,192	30,920
Current	56,128	65,193
Total Loans	84,320	96,113
Legacy Loans [Member]
Summary of loans by portfolio type
Days Past Due 30 to 59	34,426	46,701
Days Past Due 60 to 89	19,419	21,087
Days Past Due more than 90	70,339	114,124
Total Past Due	124,184	181,912
Current	7,091,831	6,754,675
Total Loans	7,216,015	6,936,587
More than 90 days Past Due and Accruing	7,507	21,207
Nonaccrual Loans	71,778	104,594
Acquired Loans (Noncovered) [Member]
Summary of loans by portfolio type
Days Past Due 30 to 59	4,492	2,642
Days Past Due 60 to 89	548	17,201
Days Past Due more than 90	3,778	810
Total Past Due	8,818	20,653
Current	183,386	244,848
Total Loans	192,204	265,501	323,500
More than 90 days Past Due and Accruing	2,917	810
Nonaccrual Loans	861	93
Covered Loans [Member]
Summary of loans by portfolio type
Days Past Due 30 to 59	51,112	54,047
Days Past Due 60 to 89	46,731	26,986
Days Past Due more than 90	331,010	376,176
Total Past Due	428,853	457,209
Current	1,086,830	1,230,940
Total Loans	$ 1,515,683	$ 1,688,149