Loans (Summary of Impaired Loans by Classes of Loans) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Impaired loans with a valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	$ 24,661	$ 22,501	$ 30,174
Unpaid Principal Balance	25,119	23,029	32,341
Related Valuation Allowance	1,503	1,591	4,223
Impaired loans with no valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	98,636	106,844	85,666
Unpaid Principal Balance	119,970	130,361	108,095
Related Valuation Allowance	0	0	0
Total Impaired Loans [Member]
Schedule of Impaired loans by classes
Recorded Investment	123,297	129,345	115,840
Unpaid Principal Balance	145,089	153,390	140,436
Related Valuation Allowance	1,503	1,591	4,223
Commercial [Member] | Impaired loans with a valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	1,253	2,517	5,059
Unpaid Principal Balance	1,396	2,656	5,803
Related Valuation Allowance	313	728	1,857
Commercial [Member] | Impaired loans with no valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	40,344	38,838	21,543
Unpaid Principal Balance	45,259	44,377	25,642
Related Valuation Allowance	0	0	0
Commercial [Member] | Total Impaired Loans [Member]
Schedule of Impaired loans by classes
Recorded Investment	41,597	41,355	26,602
Unpaid Principal Balance	46,655	47,033	31,445
Related Valuation Allowance	313	728	1,857
Real estate commercial [Member] | Impaired loans with a valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	3,779	2,576	6,684
Unpaid Principal Balance	4,094	2,965	7,901
Related Valuation Allowance	862	353	1,651
Real estate commercial [Member] | Impaired loans with no valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	45,550	48,220	43,178
Unpaid Principal Balance	59,037	61,444	57,256
Related Valuation Allowance	0	0	0
Real estate commercial [Member] | Total Impaired Loans [Member]
Schedule of Impaired loans by classes
Recorded Investment	49,329	50,796	49,862
Unpaid Principal Balance	63,131	64,409	65,157
Related Valuation Allowance	862	353	1,651
Real estate construction [Member] | Impaired loans with a valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	0	0	183
Unpaid Principal Balance	0	0	253
Related Valuation Allowance	0	0	33
Real estate construction [Member] | Impaired loans with no valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	162	371	133
Unpaid Principal Balance	369	478	133
Related Valuation Allowance	0	0	0
Real estate construction [Member] | Total Impaired Loans [Member]
Schedule of Impaired loans by classes
Recorded Investment	162	371	316
Unpaid Principal Balance	369	478	386
Related Valuation Allowance	0	0	33
Land development [Member] | Impaired loans with a valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	0	0	517
Unpaid Principal Balance	0	0	653
Related Valuation Allowance	0	0	97
Land development [Member] | Impaired loans with no valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	3,244	7,170	9,095
Unpaid Principal Balance	5,969	11,817	13,347
Related Valuation Allowance	0	0	0
Land development [Member] | Total Impaired Loans [Member]
Schedule of Impaired loans by classes
Recorded Investment	3,244	7,170	9,612
Unpaid Principal Balance	5,969	11,817	14,000
Related Valuation Allowance	0	0	97
Real estate residential [Member] | Impaired loans with a valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	19,629	17,408	17,731
Unpaid Principal Balance	19,629	17,408	17,731
Related Valuation Allowance	328	510	585
Real estate residential [Member] | Impaired loans with no valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	6,693	8,921	8,029
Unpaid Principal Balance	6,693	8,921	8,029
Related Valuation Allowance	0	0	0
Real estate residential [Member] | Total Impaired Loans [Member]
Schedule of Impaired loans by classes
Recorded Investment	26,322	26,329	25,760
Unpaid Principal Balance	26,322	26,329	25,760
Related Valuation Allowance	328	510	585
Consumer installment [Member] | Impaired loans with no valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	527	676	665
Unpaid Principal Balance	527	676	665
Related Valuation Allowance	0	0	0
Consumer installment [Member] | Total Impaired Loans [Member]
Schedule of Impaired loans by classes
Recorded Investment	527	676	665
Unpaid Principal Balance	527	676	665
Related Valuation Allowance	0	0	0
Home equity [Member] | Impaired loans with no valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	2,116	2,648	3,023
Unpaid Principal Balance	2,116	2,648	3,023
Related Valuation Allowance	0	0	0
Home equity [Member] | Total Impaired Loans [Member]
Schedule of Impaired loans by classes
Recorded Investment	2,116	2,648	3,023
Unpaid Principal Balance	2,116	2,648	3,023
Related Valuation Allowance	$ 0	$ 0	$ 0