Loans and Asset Quality Information (Details 12) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Non-covered loans	$ 2,094,143	$ 2,069,152
Unamortized net deferred loan costs	1,324	1,280
Covered loans	282,314	361,234
Total loans	2,376,457	2,430,386
Non-covered
Non-covered loans	2,092,819	2,067,872
Commercial Unsecured
Non-covered loans	35,686	38,778
Commercial Secured
Non-covered loans	113,712	111,751
Secured by Inventory and Accounts Receivable
Non-covered loans	21,343	21,828
RealEstateConstructionMember
Non-covered loans	218,108	246,805
Real estate residential, farmland and mutli-family
Non-covered loans	819,439	795,655
Real estate home equity lines of credit
Non-covered loans	200,880	207,436
Real estate commercial
Non-covered loans	627,940	587,183
Consumer
Non-covered loans	55,711	58,436
Pass (Grades 1, 2 and 3)
Non-covered loans	602,668	650,801
Covered loans	42,935	62,052
Total loans	645,603	712,853
Pass (Grades 1, 2 and 3) | Commercial Unsecured
Non-covered loans	10,283	13,516
Pass (Grades 1, 2 and 3) | Commercial Secured
Non-covered loans	32,196	36,587
Pass (Grades 1, 2 and 3) | Secured by Inventory and Accounts Receivable
Non-covered loans	2,344	3,756
Pass (Grades 1, 2 and 3) | RealEstateConstructionMember
Non-covered loans	31,582	37,596
Pass (Grades 1, 2 and 3) | Real estate residential, farmland and mutli-family
Non-covered loans	249,313	257,163
Pass (Grades 1, 2 and 3) | Real estate home equity lines of credit
Non-covered loans	125,310	130,913
Pass (Grades 1, 2 and 3) | Real estate commercial
Non-covered loans	123,814	140,577
Pass (Grades 1, 2 and 3) | Consumer
Non-covered loans	27,826	30,693
Weak Pass (Grade 4)
Non-covered loans	1,317,636	1,182,646
Covered loans	124,451	161,508
Total loans	1,442,087	1,344,154
Weak Pass (Grade 4) | Commercial Unsecured
Non-covered loans	24,031	23,735
Weak Pass (Grade 4) | Commercial Secured
Non-covered loans	72,838	66,105
Weak Pass (Grade 4) | Secured by Inventory and Accounts Receivable
Non-covered loans	18,126	16,197
Weak Pass (Grade 4) | RealEstateConstructionMember
Non-covered loans	163,588	156,651
Weak Pass (Grade 4) | Real estate residential, farmland and mutli-family
Non-covered loans	499,922	456,188
Weak Pass (Grade 4) | Real estate home equity lines of credit
Non-covered loans	66,412	67,606
Weak Pass (Grade 4) | Real estate commercial
Non-covered loans	449,316	372,614
Weak Pass (Grade 4) | Consumer
Non-covered loans	23,403	23,550
Watch or Standard Loans (Grade 9)
Non-covered loans	36,734	52,156
Covered loans
Total loans	36,734	52,156
Watch or Standard Loans (Grade 9) | Commercial Unsecured
Non-covered loans	10	13
Watch or Standard Loans (Grade 9) | Commercial Secured
Non-covered loans	1,454	1,912
Watch or Standard Loans (Grade 9) | Secured by Inventory and Accounts Receivable
Non-covered loans	248	282
Watch or Standard Loans (Grade 9) | RealEstateConstructionMember
Non-covered loans	3,830	6,490
Watch or Standard Loans (Grade 9) | Real estate residential, farmland and mutli-family
Non-covered loans	7,154	10,248
Watch or Standard Loans (Grade 9) | Real estate home equity lines of credit
Non-covered loans	2,160	2,422
Watch or Standard Loans (Grade 9) | Real estate commercial
Non-covered loans	21,801	30,722
Watch or Standard Loans (Grade 9) | Consumer
Non-covered loans	77	67
Special Mention Loans (Grade 5)
Non-covered loans	61,305	44,497
Covered loans	7,569	8,033
Total loans	68,874	52,530
Special Mention Loans (Grade 5) | Commercial Unsecured
Non-covered loans	472	217
Special Mention Loans (Grade 5) | Commercial Secured
Non-covered loans	3,676	2,196
Special Mention Loans (Grade 5) | Secured by Inventory and Accounts Receivable
Non-covered loans	491	756
Special Mention Loans (Grade 5) | RealEstateConstructionMember
Non-covered loans	9,045	9,903
Special Mention Loans (Grade 5) | Real estate residential, farmland and mutli-family
Non-covered loans	29,091	17,687
Special Mention Loans (Grade 5) | Real estate home equity lines of credit
Non-covered loans	3,526	1,868
Special Mention Loans (Grade 5) | Real estate commercial
Non-covered loans	14,050	11,502
Special Mention Loans (Grade 5) | Consumer
Non-covered loans	954	368
Classified Loans (Grades 6,7 and 8)
Non-covered loans	41,442	64,206
Covered loans	73,868	88,169
Total loans	115,310	152,375
Classified Loans (Grades 6,7 and 8) | Commercial Unsecured
Non-covered loans	583	845
Classified Loans (Grades 6,7 and 8) | Commercial Secured
Non-covered loans	1,150	2,761
Classified Loans (Grades 6,7 and 8) | Secured by Inventory and Accounts Receivable
Non-covered loans	117	249
Classified Loans (Grades 6,7 and 8) | RealEstateConstructionMember
Non-covered loans	3,709	13,393
Classified Loans (Grades 6,7 and 8) | Real estate residential, farmland and mutli-family
Non-covered loans	24,330	28,939
Classified Loans (Grades 6,7 and 8) | Real estate home equity lines of credit
Non-covered loans	1,850	1,466
Classified Loans (Grades 6,7 and 8) | Real estate commercial
Non-covered loans	9,074	15,565
Classified Loans (Grades 6,7 and 8) | Consumer
Non-covered loans	629	988
Nonaccrual Loans
Non-covered loans	33,034	73,566
Covered loans	33,491	41,472
Total loans	66,525	115,038
Nonaccrual Loans | Commercial Unsecured
Non-covered loans	307	452
Nonaccrual Loans | Commercial Secured
Non-covered loans	2,398	2,190
Nonaccrual Loans | Secured by Inventory and Accounts Receivable
Non-covered loans	17	588
Nonaccrual Loans | RealEstateConstructionMember
Non-covered loans	6,354	22,772
Nonaccrual Loans | Real estate residential, farmland and mutli-family
Non-covered loans	9,629	25,430
Nonaccrual Loans | Real estate home equity lines of credit
Non-covered loans	1,622	3,161
Nonaccrual Loans | Real estate commercial
Non-covered loans	9,885	16,203
Nonaccrual Loans | Consumer
Non-covered loans	$ 2,822	$ 2,770