Impaired Loans and Valuation Allowance for Loan Losses - Company's Recorded Investments in Impaired Loans and the Related Valuation Allowances (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Recorded Investment
Impaired Financing Receivable, with No Related Allowance, Recorded		$ 52,969
Total	49,902
Unpaid Principal Balance
Impaired Financing Receivable, with No Related Allowance Recorded		62,446
Total	57,553
Related Valuation Allowance
Impaired Financing Receivable With No Related Allowance Recorded		5,446
Total	4,693
Construction Land Development [Member]
Recorded Investment
Impaired Financing Receivable, with No Related Allowance, Recorded	2,209	2,561
Impaired Financing Receivable, with Related Allowance, Recorded	1,047	1,120
Total	3,256	3,681
Unpaid Principal Balance
Impaired Financing Receivable, with No Related Allowance Recorded	2,673	3,180
Impaired Financing Receivable, with Related Allowance Recorded	1,432	1,197
Total	4,105	4,377
Related Valuation Allowance
Impaired Financing Receivable With No Related Allowance Recorded	0	0
Impaired Financing Receivable With Related Allowance Recorded	311	149
Total	311	149
Residential Real Estate [Member]
Recorded Investment
Impaired Financing Receivable, with No Related Allowance, Recorded	10,023	12,366
Impaired Financing Receivable, with Related Allowance, Recorded	20,427	23,365
Total	30,450	35,731
Unpaid Principal Balance
Impaired Financing Receivable, with No Related Allowance Recorded	14,051	17,372
Impaired Financing Receivable, with Related Allowance Recorded	21,450	24,766
Total	35,501	42,138
Related Valuation Allowance
Impaired Financing Receivable With No Related Allowance Recorded	0	0
Impaired Financing Receivable With Related Allowance Recorded	3,440	4,528
Total	3,440	4,528
Commercial Real Estate [Member]
Recorded Investment
Impaired Financing Receivable, with No Related Allowance, Recorded	3,125	4,481
Impaired Financing Receivable, with Related Allowance, Recorded	12,085	7,937
Total	15,210	12,418
Unpaid Principal Balance
Impaired Financing Receivable, with No Related Allowance Recorded	4,677	6,577
Impaired Financing Receivable, with Related Allowance Recorded	12,187	8,046
Total	16,864	14,623
Related Valuation Allowance
Impaired Financing Receivable With No Related Allowance Recorded	0	0
Impaired Financing Receivable With Related Allowance Recorded	815	638
Total	815	638
Commercial And Financial [Member]
Recorded Investment
Impaired Financing Receivable, with No Related Allowance, Recorded	150	153
Impaired Financing Receivable, with Related Allowance, Recorded	10	13
Total	160	166
Unpaid Principal Balance
Impaired Financing Receivable, with No Related Allowance Recorded	150	153
Impaired Financing Receivable, with Related Allowance Recorded	10	13
Total	160	166
Related Valuation Allowance
Impaired Financing Receivable With No Related Allowance Recorded	0	0
Impaired Financing Receivable With Related Allowance Recorded	10	13
Total	10	13
Consumer [Member]
Recorded Investment
Impaired Financing Receivable, with No Related Allowance, Recorded	281	425
Impaired Financing Receivable, with Related Allowance, Recorded	545	548
Total	826	973
Unpaid Principal Balance
Impaired Financing Receivable, with No Related Allowance Recorded	324	569
Impaired Financing Receivable, with Related Allowance Recorded	599	573
Total	923	1,142
Related Valuation Allowance
Impaired Financing Receivable With No Related Allowance Recorded	0	0
Impaired Financing Receivable With Related Allowance Recorded	117	118
Total	$ 117	$ 118