Loans and Allowance for Loan Losses (Accruing and Non-accruing TDR Table) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Summary of loans modified as TDRs
Total TDRs	$ 150,487	[1]	$ 150,356	[1]
Financing Receivable, Allowance for Credit Losses	5,004	[2]	7,080	[2]
Noncovered Loans Commercial [Member] | Commercial and Industrial [Member]
Summary of loans modified as TDRs
Total TDRs	2,617	[1]	2,512	[1]
Noncovered Loans Commercial [Member] | Commercial Real Estate [Member]
Summary of loans modified as TDRs
Total TDRs	16,305	[1]	9,167	[1]
Noncovered Loans Commercial [Member] | Construction [Member]
Summary of loans modified as TDRs
Total TDRs	2,955	[1]	3,323	[1]
Noncovered Loans Commercial [Member] | Commercial Loan [Member]
Summary of loans modified as TDRs
Total TDRs	21,877	[1]	15,002	[1]
Noncovered Consumer Loans [Member] | Consumer Installment [Member]
Summary of loans modified as TDRs
Total TDRs	30,870		33,571
Noncovered Consumer Loans [Member] | Consumer Home Equity Lines [Member]
Summary of loans modified as TDRs
Total TDRs	6,281		4,763
Noncovered Consumer Loans [Member] | Credit Card [Member]
Summary of loans modified as TDRs
Total TDRs	1,612	[1]	2,202	[1]
Noncovered Consumer Loans [Member] | Consumer Residential Mortgages [Member]
Summary of loans modified as TDRs
Total TDRs	24,009		17,398
Noncovered Consumer Loans [Member] | Consumer Loan [Member]
Summary of loans modified as TDRs
Total TDRs	62,772	[1]	57,934	[1]
Noncovered Loans [Member]
Summary of loans modified as TDRs
Total TDRs	84,649	[1]	72,936	[1]
Covered Commercial TDR Loans [Member] | Commercial and Industrial [Member]
Summary of loans modified as TDRs
Total TDRs	1,763		7,578
Covered Commercial TDR Loans [Member] | Commercial Real Estate [Member]
Summary of loans modified as TDRs
Total TDRs	50,272		57,786
Covered Commercial TDR Loans [Member] | Construction [Member]
Summary of loans modified as TDRs
Total TDRs	8,171		12,056
Covered Commercial TDR Loans [Member] | Commercial Loan [Member]
Summary of loans modified as TDRs
Total TDRs	60,206
Covered Consumer Loans [Member] | Consumer Home Equity Lines [Member]
Summary of loans modified as TDRs
Total TDRs	5,632
Covered TDR Loans [Member]
Summary of loans modified as TDRs
Total TDRs	65,838	[1]	77,420
Accruing TDRs [Member]
Summary of loans modified as TDRs
Current	77,630		100,358
Delinquent	57,823		38,245
Total TDRs	135,453		138,603
Accruing TDRs [Member] | Noncovered Loans Commercial [Member] | Commercial and Industrial [Member]
Summary of loans modified as TDRs
Current	704		91
Delinquent	1,004		0
Total TDRs	1,708		91
Accruing TDRs [Member] | Noncovered Loans Commercial [Member] | Commercial Real Estate [Member]
Summary of loans modified as TDRs
Current	12,719		3,305
Delinquent	793		513
Total TDRs	13,512		3,818
Accruing TDRs [Member] | Noncovered Loans Commercial [Member] | Construction [Member]
Summary of loans modified as TDRs
Current	1,860		2,782
Delinquent	960		0
Total TDRs	2,820		2,782
Accruing TDRs [Member] | Noncovered Loans Commercial [Member] | Commercial Loan [Member]
Summary of loans modified as TDRs
Current	15,283		6,178
Delinquent	2,757		513
Total TDRs	18,040		6,691
Accruing TDRs [Member] | Noncovered Consumer Loans [Member] | Consumer Installment [Member]
Summary of loans modified as TDRs
Current	27,085		31,637
Delinquent	1,547		1,800
Total TDRs	28,632		33,437
Accruing TDRs [Member] | Noncovered Consumer Loans [Member] | Consumer Home Equity Lines [Member]
Summary of loans modified as TDRs
Current	5,183		4,226
Delinquent	236		222
Total TDRs	5,419		4,448
Accruing TDRs [Member] | Noncovered Consumer Loans [Member] | Credit Card [Member]
Summary of loans modified as TDRs
Current	1,483		2,073
Delinquent	118		110
Total TDRs	1,601		2,183
Accruing TDRs [Member] | Noncovered Consumer Loans [Member] | Consumer Residential Mortgages [Member]
Summary of loans modified as TDRs
Current	12,510		13,736
Delinquent	3,413		688
Total TDRs	15,923		14,424
Accruing TDRs [Member] | Noncovered Consumer Loans [Member] | Consumer Loan [Member]
Summary of loans modified as TDRs
Current	46,261		51,672
Delinquent	5,314		2,820
Total TDRs	51,575		54,492
Accruing TDRs [Member] | Noncovered Loans [Member]
Summary of loans modified as TDRs
Current	61,544		57,850
Delinquent	8,071		3,333
Total TDRs	69,615		61,183
Accruing TDRs [Member] | Covered Commercial TDR Loans [Member] | Commercial and Industrial [Member]
Summary of loans modified as TDRs
Current	435		1,587
Delinquent	1,328		5,991
Total TDRs	1,763		7,578
Accruing TDRs [Member] | Covered Commercial TDR Loans [Member] | Commercial Real Estate [Member]
Summary of loans modified as TDRs
Current	7,658		35,083
Delinquent	42,614		22,703
Total TDRs	50,272		57,786
Accruing TDRs [Member] | Covered Commercial TDR Loans [Member] | Construction [Member]
Summary of loans modified as TDRs
Current	2,361		5,838
Delinquent	5,810		6,218
Total TDRs	8,171		12,056
Accruing TDRs [Member] | Covered Commercial TDR Loans [Member] | Commercial Loan [Member]
Summary of loans modified as TDRs
Current	10,454
Delinquent	49,752
Total TDRs	60,206
Accruing TDRs [Member] | Covered Consumer Loans [Member] | Consumer Home Equity Lines [Member]
Summary of loans modified as TDRs
Current	5,632
Delinquent	0
Total TDRs	5,632
Accruing TDRs [Member] | Covered TDR Loans [Member]
Summary of loans modified as TDRs
Current	16,086		42,508
Delinquent	49,752		34,912
Total TDRs	65,838		77,420
Nonaccruing TDRs [Member]
Summary of loans modified as TDRs
Current	9,336		5,592
Delinquent	5,698		6,161
Total TDRs	15,034		11,753
Nonaccruing TDRs [Member] | Noncovered Loans Commercial [Member] | Commercial and Industrial [Member]
Summary of loans modified as TDRs
Current	844		0
Delinquent	65		2,421
Total TDRs	909		2,421
Nonaccruing TDRs [Member] | Noncovered Loans Commercial [Member] | Commercial Real Estate [Member]
Summary of loans modified as TDRs
Current	461		3,590
Delinquent	2,332		1,759
Total TDRs	2,793		5,349
Nonaccruing TDRs [Member] | Noncovered Loans Commercial [Member] | Construction [Member]
Summary of loans modified as TDRs
Current	135		304
Delinquent	0		237
Total TDRs	135		541
Nonaccruing TDRs [Member] | Noncovered Loans Commercial [Member] | Commercial Loan [Member]
Summary of loans modified as TDRs
Current	1,440		3,894
Delinquent	2,397		4,417
Total TDRs	3,837		8,311
Nonaccruing TDRs [Member] | Noncovered Consumer Loans [Member] | Consumer Installment [Member]
Summary of loans modified as TDRs
Current	2,064		0
Delinquent	174		134
Total TDRs	2,238		134
Nonaccruing TDRs [Member] | Noncovered Consumer Loans [Member] | Consumer Home Equity Lines [Member]
Summary of loans modified as TDRs
Current	636		76
Delinquent	226		239
Total TDRs	862		315
Nonaccruing TDRs [Member] | Noncovered Consumer Loans [Member] | Credit Card [Member]
Summary of loans modified as TDRs
Current	0		0
Delinquent	11		19
Total TDRs	11		19
Nonaccruing TDRs [Member] | Noncovered Consumer Loans [Member] | Consumer Residential Mortgages [Member]
Summary of loans modified as TDRs
Current	5,196		1,622
Delinquent	2,890		1,352
Total TDRs	8,086		2,974
Nonaccruing TDRs [Member] | Noncovered Consumer Loans [Member] | Consumer Loan [Member]
Summary of loans modified as TDRs
Current	7,896		1,698
Delinquent	3,301		1,744
Total TDRs	11,197		3,442
Nonaccruing TDRs [Member] | Noncovered Loans [Member]
Summary of loans modified as TDRs
Current	9,336		5,592
Delinquent	5,698		6,161
Total TDRs	15,034		11,753
Nonaccruing TDRs [Member] | Covered Commercial TDR Loans [Member] | Commercial and Industrial [Member]
Summary of loans modified as TDRs
Current	0		0
Delinquent	0		0
Total TDRs	0		0
Nonaccruing TDRs [Member] | Covered Commercial TDR Loans [Member] | Commercial Real Estate [Member]
Summary of loans modified as TDRs
Current	0		0
Delinquent	0		0
Total TDRs	0		0
Nonaccruing TDRs [Member] | Covered Commercial TDR Loans [Member] | Construction [Member]
Summary of loans modified as TDRs
Current	0		0
Delinquent	0		0
Total TDRs	0		0
Nonaccruing TDRs [Member] | Covered Commercial TDR Loans [Member] | Commercial Loan [Member]
Summary of loans modified as TDRs
Current	0
Delinquent	0
Total TDRs	0
Nonaccruing TDRs [Member] | Covered Consumer Loans [Member] | Consumer Home Equity Lines [Member]
Summary of loans modified as TDRs
Current	0
Delinquent	0
Total TDRs	0
Nonaccruing TDRs [Member] | Covered TDR Loans [Member]
Summary of loans modified as TDRs
Current	0		0
Delinquent	0		0
Total TDRs	0		0
Total Tdr Allowance [Member]
Summary of loans modified as TDRs
Financing Receivable, Allowance for Credit Losses	11,297		12,114
Total Tdr Allowance [Member] | Noncovered Loans Commercial [Member] | Commercial and Industrial [Member]
Summary of loans modified as TDRs
Financing Receivable, Allowance for Credit Losses	217		247
Total Tdr Allowance [Member] | Noncovered Loans Commercial [Member] | Commercial Real Estate [Member]
Summary of loans modified as TDRs
Financing Receivable, Allowance for Credit Losses	869		236
Total Tdr Allowance [Member] | Noncovered Loans Commercial [Member] | Construction [Member]
Summary of loans modified as TDRs
Financing Receivable, Allowance for Credit Losses	105		99
Total Tdr Allowance [Member] | Noncovered Loans Commercial [Member] | Commercial Loan [Member]
Summary of loans modified as TDRs
Financing Receivable, Allowance for Credit Losses	1,191		582
Total Tdr Allowance [Member] | Noncovered Consumer Loans [Member] | Consumer Installment [Member]
Summary of loans modified as TDRs
Financing Receivable, Allowance for Credit Losses	1,526		1,382
Total Tdr Allowance [Member] | Noncovered Consumer Loans [Member] | Consumer Home Equity Lines [Member]
Summary of loans modified as TDRs
Financing Receivable, Allowance for Credit Losses	34		31
Total Tdr Allowance [Member] | Noncovered Consumer Loans [Member] | Credit Card [Member]
Summary of loans modified as TDRs
Financing Receivable, Allowance for Credit Losses	127		108
Total Tdr Allowance [Member] | Noncovered Consumer Loans [Member] | Consumer Residential Mortgages [Member]
Summary of loans modified as TDRs
Financing Receivable, Allowance for Credit Losses	1,722		1,364
Total Tdr Allowance [Member] | Noncovered Consumer Loans [Member] | Consumer Loan [Member]
Summary of loans modified as TDRs
Financing Receivable, Allowance for Credit Losses	3,409		2,885
Total Tdr Allowance [Member] | Noncovered Loans [Member]
Summary of loans modified as TDRs
Financing Receivable, Allowance for Credit Losses	4,600		3,467
Total Tdr Allowance [Member] | Covered Commercial TDR Loans [Member] | Commercial and Industrial [Member]
Summary of loans modified as TDRs
Financing Receivable, Allowance for Credit Losses	518		1,384
Total Tdr Allowance [Member] | Covered Commercial TDR Loans [Member] | Commercial Real Estate [Member]
Summary of loans modified as TDRs
Financing Receivable, Allowance for Credit Losses	4,959		6,567
Total Tdr Allowance [Member] | Covered Commercial TDR Loans [Member] | Construction [Member]
Summary of loans modified as TDRs
Financing Receivable, Allowance for Credit Losses	1,220		696
Total Tdr Allowance [Member] | Covered Commercial TDR Loans [Member] | Commercial Loan [Member]
Summary of loans modified as TDRs
Financing Receivable, Allowance for Credit Losses	6,697
Total Tdr Allowance [Member] | Covered Consumer Loans [Member] | Consumer Home Equity Lines [Member]
Summary of loans modified as TDRs
Financing Receivable, Allowance for Credit Losses	0
Total Tdr Allowance [Member] | Covered TDR Loans [Member]
Summary of loans modified as TDRs
Financing Receivable, Allowance for Credit Losses	$ 6,697		$ 8,647

[1] (a) The differences between the recorded investment and unpaid principal balance amounts represents partial charge offs.

[2] (a) These tables exclude loans fully charged off.