Loans (Summary of Impaired Loans by Classes of Loans) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013
Impaired loans with a valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	$ 27,627	$ 22,501	$ 32,836
Unpaid Principal Balance	29,216	23,029	36,058
Related Valuation Allowance	1,719	1,591	4,434
Impaired loans with no valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	99,153	106,844	86,631
Unpaid Principal Balance	119,489	130,361	107,050
Related Valuation Allowance	0	0	0
Total Impaired Loans [Member]
Schedule of Impaired loans by classes
Recorded Investment	126,780	129,345	119,467
Unpaid Principal Balance	148,705	153,390	143,108
Related Valuation Allowance	1,719	1,591	4,434
Commercial [Member] | Impaired loans with a valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	2,905	2,517	4,569
Unpaid Principal Balance	3,258	2,656	5,618
Related Valuation Allowance	563	728	1,610
Commercial [Member] | Impaired loans with no valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	39,420	38,838	21,969
Unpaid Principal Balance	43,463	44,377	25,934
Related Valuation Allowance	0	0	0
Commercial [Member] | Total Impaired Loans [Member]
Schedule of Impaired loans by classes
Recorded Investment	42,325	41,355	26,538
Unpaid Principal Balance	46,721	47,033	31,552
Related Valuation Allowance	563	728	1,610
Real estate commercial [Member] | Impaired loans with a valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	4,369	2,576	8,822
Unpaid Principal Balance	5,605	2,965	10,162
Related Valuation Allowance	777	353	2,112
Real estate commercial [Member] | Impaired loans with no valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	46,205	48,220	42,913
Unpaid Principal Balance	58,997	61,444	56,117
Related Valuation Allowance	0	0	0
Real estate commercial [Member] | Total Impaired Loans [Member]
Schedule of Impaired loans by classes
Recorded Investment	50,574	50,796	51,735
Unpaid Principal Balance	64,602	64,409	66,279
Related Valuation Allowance	777	353	2,112
Real estate construction [Member] | Impaired loans with a valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	0	0	0
Unpaid Principal Balance	0	0	0
Related Valuation Allowance	0	0	0
Real estate construction [Member] | Impaired loans with no valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	160	371	397
Unpaid Principal Balance	366	478	467
Related Valuation Allowance	0	0	0
Real estate construction [Member] | Total Impaired Loans [Member]
Schedule of Impaired loans by classes
Recorded Investment	160	371	397
Unpaid Principal Balance	366	478	467
Related Valuation Allowance	0	0	0
Land development [Member] | Impaired loans with a valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	0	0	2,039
Unpaid Principal Balance	0	0	2,872
Related Valuation Allowance	0	0	130
Land development [Member] | Impaired loans with no valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	4,211	7,170	8,495
Unpaid Principal Balance	7,506	11,817	11,675
Related Valuation Allowance	0	0	0
Land development [Member] | Total Impaired Loans [Member]
Schedule of Impaired loans by classes
Recorded Investment	4,211	7,170	10,534
Unpaid Principal Balance	7,506	11,817	14,547
Related Valuation Allowance	0	0	130
Real estate residential [Member] | Impaired loans with a valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	20,353	17,408	17,406
Unpaid Principal Balance	20,353	17,408	17,406
Related Valuation Allowance	379	510	582
Real estate residential [Member] | Impaired loans with no valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	6,325	8,921	9,241
Unpaid Principal Balance	6,325	8,921	9,241
Related Valuation Allowance	0	0	0
Real estate residential [Member] | Total Impaired Loans [Member]
Schedule of Impaired loans by classes
Recorded Investment	26,678	26,329	26,647
Unpaid Principal Balance	26,678	26,329	26,647
Related Valuation Allowance	379	510	582
Consumer installment [Member] | Impaired loans with no valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	536	676	552
Unpaid Principal Balance	536	676	552
Related Valuation Allowance	0	0	0
Consumer installment [Member] | Total Impaired Loans [Member]
Schedule of Impaired loans by classes
Recorded Investment	536	676	552
Unpaid Principal Balance	536	676	552
Related Valuation Allowance	0	0	0
Home equity [Member] | Impaired loans with no valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	2,296	2,648	3,064
Unpaid Principal Balance	2,296	2,648	3,064
Related Valuation Allowance	0	0	0
Home equity [Member] | Total Impaired Loans [Member]
Schedule of Impaired loans by classes
Recorded Investment	2,296	2,648	3,064
Unpaid Principal Balance	2,296	2,648	3,064
Related Valuation Allowance	$ 0	$ 0	$ 0