Loans and Allowance for Loan Losses, Impaired Financing Receivable (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2014		Dec. 31, 2013
Financing Receivable, Impaired [Line Items]
Recorded investment	$ 15,606,000		$ 18,183,000
Unpaid principal balance	17,011,000		19,526,000
Related allowance	1,298,000	[1]	1,187,000	[1]
Average recorded investment	16,113,000		21,484,000
Interest income recognized	0		0
Interest income from cash payments received	0		0
Collateral Dependent Impaired Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	9,210,000		11,570,000
Unpaid principal balance	9,901,000		12,136,000
Related allowance	0	[1]	0	[1]
Average recorded investment	9,271,000		13,605,000
Interest income recognized	0		0
Collateral Dependent Impaired Loans [Member] | Commercial Real Estate - Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	5,192,000		7,035,000
Unpaid principal balance	5,712,000		7,481,000
Related allowance	0	[1]	0	[1]
Average recorded investment	5,225,000		6,522,000
Interest income recognized	0		0
Collateral Dependent Impaired Loans [Member] | Consumer Real Estate - Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	2,413,000		2,162,000
Unpaid principal balance	2,476,000		2,209,000
Related allowance	0	[1]	0	[1]
Average recorded investment	2,427,000		2,234,000
Interest income recognized	0		0
Collateral Dependent Impaired Loans [Member] | Construction and Land Development [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	545,000		545,000
Unpaid principal balance	545,000		545,000
Related allowance	0	[1]	0	[1]
Average recorded investment	545,000		938,000
Interest income recognized	0		0
Collateral Dependent Impaired Loans [Member] | Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	1,060,000		1,828,000
Unpaid principal balance	1,168,000		1,901,000
Related allowance	0	[1]	0	[1]
Average recorded investment	1,074,000		3,911,000
Interest income recognized	0		0
Collateral Dependent Impaired Loans [Member] | Consumer and Other [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	0		0
Unpaid principal balance	0		0
Related allowance	0	[1]	0	[1]
Average recorded investment	0		0
Interest income recognized	0		0
Cash Flow Dependent Impaired Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	6,396,000		6,613,000
Unpaid principal balance	7,110,000		7,390,000
Related allowance	1,298,000	[1]	1,187,000	[1]
Average recorded investment	6,842,000		7,879,000
Interest income recognized	0		0
Cash Flow Dependent Impaired Loans [Member] | Commercial Real Estate - Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	1,953,000		1,982,000
Unpaid principal balance	2,152,000		2,166,000
Related allowance	161,000	[1]	142,000	[1]
Average recorded investment	1,964,000		2,448,000
Interest income recognized	0		0
Cash Flow Dependent Impaired Loans [Member] | Consumer Real Estate - Mortgage [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	3,266,000		3,127,000
Unpaid principal balance	3,514,000		3,334,000
Related allowance	875,000	[1]	722,000	[1]
Average recorded investment	3,289,000		3,405,000
Interest income recognized	0		0
Cash Flow Dependent Impaired Loans [Member] | Construction and Land Development [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	445,000		525,000
Unpaid principal balance	516,000		609,000
Related allowance	14,000	[1]	33,000	[1]
Average recorded investment	450,000		568,000
Interest income recognized	0		0
Cash Flow Dependent Impaired Loans [Member] | Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	478,000		737,000
Unpaid principal balance	658,000		1,029,000
Related allowance	162,000	[1]	218,000	[1]
Average recorded investment	879,000		1,216,000
Interest income recognized	0		0
Cash Flow Dependent Impaired Loans [Member] | Consumer and Other [Member]
Financing Receivable, Impaired [Line Items]
Recorded investment	254,000		242,000
Unpaid principal balance	270,000		252,000
Related allowance	86,000	[1]	72,000	[1]
Average recorded investment	260,000		242,000
Interest income recognized	$ 0		$ 0

[1] Collateral dependent loans are typically charged-off to their net realizable value pursuant to requirements of our primary regulators and no specific allowance is carried related to those loans.