Loans (Summary of Impaired Loans by Classes of Loans) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Impaired loans with a valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	$ 22,501	$ 42,961
Unpaid Principal Balance	23,029	43,751
Related Valuation Allowance	1,591	8,108
Average Annual Recorded Investment	33,587	48,611
Interest Income Recognized While on Impaired Status	1,123	1,353
Impaired loans with no valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	106,844	86,002
Unpaid Principal Balance	130,361	106,354
Related Valuation Allowance	0	0
Average Annual Recorded Investment	87,434	84,419
Interest Income Recognized While on Impaired Status	2,641	2,371
Total Impaired Loans [Member]
Schedule of Impaired loans by classes
Recorded Investment	129,345	128,963
Unpaid Principal Balance	153,390	150,105
Related Valuation Allowance	1,591	8,108
Average Annual Recorded Investment	121,021	133,030	157,300
Interest Income Recognized While on Impaired Status	3,764	3,724	3,600
Commercial [Member] | Impaired loans with a valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	2,517	6,368
Unpaid Principal Balance	2,656	6,818
Related Valuation Allowance	728	1,966
Average Annual Recorded Investment	5,398	6,108
Interest Income Recognized While on Impaired Status	0	0
Commercial [Member] | Impaired loans with no valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	38,838	23,230
Unpaid Principal Balance	44,377	27,959
Related Valuation Allowance	0	0
Average Annual Recorded Investment	24,231	21,651
Interest Income Recognized While on Impaired Status	990	964
Commercial [Member] | Total Impaired Loans [Member]
Schedule of Impaired loans by classes
Recorded Investment	41,355	29,598
Unpaid Principal Balance	47,033	34,777
Related Valuation Allowance	728	1,966
Average Annual Recorded Investment	29,629	27,759	29,900
Interest Income Recognized While on Impaired Status	990	964	1,000
Real estate commercial [Member] | Impaired loans with a valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	2,576	17,267
Unpaid Principal Balance	2,965	17,607
Related Valuation Allowance	353	5,359
Average Annual Recorded Investment	9,725	19,788
Interest Income Recognized While on Impaired Status	0	0
Real estate commercial [Member] | Impaired loans with no valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	48,220	37,223
Unpaid Principal Balance	61,444	48,531
Related Valuation Allowance	0	0
Average Annual Recorded Investment	41,100	38,342
Interest Income Recognized While on Impaired Status	1,348	1,020
Real estate commercial [Member] | Total Impaired Loans [Member]
Schedule of Impaired loans by classes
Recorded Investment	50,796	54,490
Unpaid Principal Balance	64,409	66,138
Related Valuation Allowance	353	5,359
Average Annual Recorded Investment	50,825	58,130	69,400
Interest Income Recognized While on Impaired Status	1,348	1,020	800
Real estate construction [Member] | Impaired loans with a valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	0	171
Unpaid Principal Balance	0	171
Related Valuation Allowance	0	75
Average Annual Recorded Investment	56	130
Interest Income Recognized While on Impaired Status	0	0
Real estate construction [Member] | Impaired loans with no valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	371	1,046
Unpaid Principal Balance	478	1,116
Related Valuation Allowance	0	0
Average Annual Recorded Investment	314	543
Interest Income Recognized While on Impaired Status	0	0
Real estate construction [Member] | Total Impaired Loans [Member]
Schedule of Impaired loans by classes
Recorded Investment	371	1,217
Unpaid Principal Balance	478	1,287
Related Valuation Allowance	0	75
Average Annual Recorded Investment	370	673	200
Interest Income Recognized While on Impaired Status	0	0
Land development [Member] | Impaired loans with a valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	0	254
Unpaid Principal Balance	0	254
Related Valuation Allowance	0	50
Average Annual Recorded Investment	719	1,278
Interest Income Recognized While on Impaired Status	0	0
Land development [Member] | Impaired loans with no valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	7,170	10,867
Unpaid Principal Balance	11,817	15,112
Related Valuation Allowance	0	0
Average Annual Recorded Investment	9,075	7,811
Interest Income Recognized While on Impaired Status	303	387
Land development [Member] | Total Impaired Loans [Member]
Schedule of Impaired loans by classes
Recorded Investment	7,170	11,121
Unpaid Principal Balance	11,817	15,366
Related Valuation Allowance	0	50
Average Annual Recorded Investment	9,794	9,089	13,400
Interest Income Recognized While on Impaired Status	303	387	400
Real estate residential [Member] | Impaired loans with a valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	17,408	18,901
Unpaid Principal Balance	17,408	18,901
Related Valuation Allowance	510	658
Average Annual Recorded Investment	17,689	21,307
Interest Income Recognized While on Impaired Status	1,123	1,353
Real estate residential [Member] | Impaired loans with no valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	8,921	10,164
Unpaid Principal Balance	8,921	10,164
Related Valuation Allowance	0	0
Average Annual Recorded Investment	9,147	12,057
Interest Income Recognized While on Impaired Status	0	0
Real estate residential [Member] | Total Impaired Loans [Member]
Schedule of Impaired loans by classes
Recorded Investment	26,329	29,065
Unpaid Principal Balance	26,329	29,065
Related Valuation Allowance	510	658
Average Annual Recorded Investment	26,836	33,364	38,600
Interest Income Recognized While on Impaired Status	1,123	1,353	1,400
Consumer installment [Member] | Impaired loans with no valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	676	739
Unpaid Principal Balance	676	739
Related Valuation Allowance	0	0
Average Annual Recorded Investment	653	1,093
Interest Income Recognized While on Impaired Status	0	0
Consumer installment [Member] | Total Impaired Loans [Member]
Schedule of Impaired loans by classes
Recorded Investment	676	739
Unpaid Principal Balance	676	739
Related Valuation Allowance	0	0
Average Annual Recorded Investment	653	1,093	2,700
Interest Income Recognized While on Impaired Status	0	0
Home equity [Member] | Impaired loans with no valuation allowance [Member]
Schedule of Impaired loans by classes
Recorded Investment	2,648	2,733
Unpaid Principal Balance	2,648	2,733
Related Valuation Allowance	0	0
Average Annual Recorded Investment	2,914	2,922
Interest Income Recognized While on Impaired Status	0	0
Home equity [Member] | Total Impaired Loans [Member]
Schedule of Impaired loans by classes
Recorded Investment	2,648	2,733
Unpaid Principal Balance	2,648	2,733
Related Valuation Allowance	0	0
Average Annual Recorded Investment	2,914	2,922	3,100
Interest Income Recognized While on Impaired Status	$ 0	$ 0