Loans and Allowance for Loan Losses (Past Due Status) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due, 30 - 59 days	$ 11,443	$ 17,561
Past due, 60 - 89 days	5,795	2,700
Past due, more than 90 days	24,060	11,995
Nonaccrual	79,242	98,444
Total past due and nonaccrual	120,540	130,700
Current and accruing	1,056,495	1,086,835
Total Loans	1,177,035	1,217,535
Commercial and agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	79,704	95,089
Real estate - construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	58,414	92,806
Real estate - mortgage, 1-4 family residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	553,538	453,725
Real estate - mortgage, commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	441,836	531,383
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	43,543	44,532
PC [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due, 30 - 59 days	7,355	6,218
Past due, 60 - 89 days	999	1,636
Past due, more than 90 days	227	3,000
Nonaccrual	79,242	98,444
Total past due and nonaccrual	87,823	109,298
Current and accruing	860,820	776,014
Total Loans	948,643	885,312
PC [Member] | Commercial and agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due, 30 - 59 days	515	181
Past due, 60 - 89 days		124
Past due, more than 90 days	50	305
Nonaccrual	2,746	4,636
Total past due and nonaccrual	3,311	5,246
Current and accruing	61,727	59,826
Total Loans	65,038	65,072
PC [Member] | Real estate - construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due, 30 - 59 days	26	1,410
Past due, 60 - 89 days	119	75
Past due, more than 90 days		1,400
Nonaccrual	14,297	30,844
Total past due and nonaccrual	14,442	33,729
Current and accruing	41,290	51,198
Total Loans	55,732	84,927
PC [Member] | Real estate - mortgage, 1-4 family residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due, 30 - 59 days	6,173	3,066
Past due, 60 - 89 days	880	885
Past due, more than 90 days		292
Nonaccrual	18,372	26,048
Total past due and nonaccrual	25,425	30,291
Current and accruing	488,898	373,048
Total Loans	514,323	403,339
PC [Member] | Real estate - mortgage, commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due, 30 - 59 days	617	1,077
Past due, 60 - 89 days		274
Past due, more than 90 days	177	1,003
Nonaccrual	43,621	36,666
Total past due and nonaccrual	44,415	39,020
Current and accruing	226,948	249,265
Total Loans	271,363	288,285
PC [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due, 30 - 59 days	24	484
Past due, 60 - 89 days		278
Nonaccrual	206	250
Total past due and nonaccrual	230	1,012
Current and accruing	41,957	42,677
Total Loans	42,187	43,689
PI [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due, 30 - 59 days	4,088	11,343
Past due, 60 - 89 days	4,796	1,064
Past due, more than 90 days	23,833	8,995
Nonaccrual	79,242	98,444
Total past due and nonaccrual	32,717	21,402
Current and accruing	195,675	310,821
Total Loans	228,392	332,223
PI [Member] | Commercial and agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due, 30 - 59 days	100	443
Past due, 60 - 89 days	1	383
Past due, more than 90 days	1,103	579
Nonaccrual	2,746	4,636
Total past due and nonaccrual	1,204	1,405
Current and accruing	13,462	28,612
Total Loans	14,666	30,017
PI [Member] | Real estate - construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due, 30 - 59 days	117	360
Past due, more than 90 days	655	302
Nonaccrual	14,297	30,844
Total past due and nonaccrual	772	662
Current and accruing	1,910	7,217
Total Loans	2,682	7,879
PI [Member] | Real estate - mortgage, 1-4 family residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due, 30 - 59 days	1,308	1,585
Past due, 60 - 89 days	495	132
Past due, more than 90 days	4,678	1,801
Nonaccrual	18,372	26,048
Total past due and nonaccrual	6,481	3,518
Current and accruing	32,734	46,868
Total Loans	39,215	50,386
PI [Member] | Real estate - mortgage, commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due, 30 - 59 days	2,559	8,946
Past due, 60 - 89 days	4,300	535
Past due, more than 90 days	17,384	6,313
Nonaccrual	43,621	36,666
Total past due and nonaccrual	24,243	15,794
Current and accruing	146,230	227,304
Total Loans	170,473	243,098
PI [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Past due, 30 - 59 days	4	9
Past due, 60 - 89 days		14
Past due, more than 90 days	13
Nonaccrual	206	250
Total past due and nonaccrual	17	23
Current and accruing	1,339	820
Total Loans	$ 1,356	$ 843