Loans and Asset Quality Information (Details 8) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
30-59 Days Past Due	$ 23,654	$ 22,901
60-89 Days Past Due	8,137	11,385
Nonaccrual loans	66,525	115,038
Current	2,276,817	2,279,782
Total non-covered loans	2,094,143	2,069,152
[UnamortizedNetDeferredLoanCosts]	1,324	1,280
Total Covered Loans - Carrying Value	282,314	361,234
Loans	2,376,457	2,430,386
Commercial Unsecured
Nonaccrual loans	457	452
Commercial Secured
Nonaccrual loans	2,401	2,548
Secured by Inventory and Accounts Receivable
Nonaccrual loans	76	690
RealEstateConstructionMember
Nonaccrual loans	18,052	43,976
Total non-covered loans	218,108	246,805
Real estate residential, farmland and mutli-family
Nonaccrual loans	20,341	36,480
Total non-covered loans	819,439	795,655
Real estate home equity lines of credit
Nonaccrual loans	2,087	4,229
Total non-covered loans	200,880	207,436
Real estate commercial
Nonaccrual loans	20,227	23,662
Total non-covered loans	627,940	587,183
Consumer
Nonaccrual loans	2,884	3,001
Total non-covered loans	55,711	58,436
Non-covered
30-59 Days Past Due	17,090	16,390
60-89 Days Past Due	4,720	7,997
Nonaccrual loans	33,034	73,566
Current	2,037,975	1,969,919
Total non-covered loans	2,092,819	2,067,872
Non-covered | Commercial Unsecured
30-59 Days Past Due	91	67
60-89 Days Past Due	10	591
Nonaccrual loans	307	452
Current	35,278	37,668
Total non-covered loans	35,686	38,778
Non-covered | Commercial Secured
30-59 Days Past Due	1,020	672
60-89 Days Past Due	220	207
Nonaccrual loans	2,398	2,190
Current	110,074	108,682
Total non-covered loans	113,712	111,751
Non-covered | Secured by Inventory and Accounts Receivable
30-59 Days Past Due	52	247
60-89 Days Past Due	4
Nonaccrual loans	17	588
Current	21,270	20,993
Total non-covered loans	21,343	21,828
Non-covered | RealEstateConstructionMember
30-59 Days Past Due	490	1,250
60-89 Days Past Due	263	1,411
Nonaccrual loans	6,354	22,772
Current	211,001	221,372
Total non-covered loans	218,108	246,805
Non-covered | Real estate residential, farmland and mutli-family
30-59 Days Past Due	9,673	9,751
60-89 Days Past Due	2,553	4,259
Nonaccrual loans	9,629	25,430
Current	797,584	756,215
Total non-covered loans	819,439	795,655
Non-covered | Real estate home equity lines of credit
30-59 Days Past Due	976	1,126
60-89 Days Past Due	320	237
Nonaccrual loans	1,622	3,161
Current	197,962	202,912
Total non-covered loans	200,880	207,436
Non-covered | Real estate commercial
30-59 Days Past Due	4,326	2,620
60-89 Days Past Due	1,131	1,006
Nonaccrual loans	9,885	16,203
Current	612,598	567,354
Total non-covered loans	627,940	587,183
Non-covered | Consumer
30-59 Days Past Due	462	657
60-89 Days Past Due	219	286
Nonaccrual loans	2,822	2,770
Current	52,208	54,723
Total non-covered loans	55,711	58,436
Covered
30-59 Days Past Due	6,564	6,511
60-89 Days Past Due	3,417	3,388
Nonaccrual loans	33,491	41,472
Current	238,842	309,863
Total non-covered loans	282,314	361,234
Total Covered Loans - Carrying Value	282,314	361,234
Covered | Commercial Unsecured
Nonaccrual loans	150
Covered | Commercial Secured
Nonaccrual loans	3	358
Covered | Secured by Inventory and Accounts Receivable
Nonaccrual loans	59	102
Covered | RealEstateConstructionMember
Nonaccrual loans	11,698	21,204
Covered | Real estate residential, farmland and mutli-family
Nonaccrual loans	10,712	11,050
Covered | Real estate home equity lines of credit
Nonaccrual loans	465	1,068
Covered | Real estate commercial
Nonaccrual loans	10,342	7,459
Covered | Consumer
Nonaccrual loans	$ 62	$ 231