Loans and Leases - Aging Analysis of Past Due Payments for Each Loan Portfolio Segment (Details) (USD $)	3 Months Ended			6 Months Ended			12 Months Ended
	Jun. 30, 2013		Jun. 30, 2012	Jun. 30, 2013		Jun. 30, 2012	Dec. 31, 2012
Aging analysis of past due payments for each loan portfolio segment [Abstract]
30-59 Days Past Due	$ 965,000			$ 965,000			$ 2,635,000
60-89 Days Past Due	311,000			311,000			1,988,000
Accruing 90+Days	0			0			0
Total non-accrual LHFI, loan balance	16,336,000			16,336,000			21,432,000
Current	350,255,000			350,255,000			318,627,000
Subtotal LHFI	367,867,000		372,836,000	367,867,000		372,836,000	344,682,000
Less: Deferred loan fees	0	[1]		0	[1]		(517,000)	[1]
Total loans and leases	367,867,000			367,867,000			344,165,000
Non-accrual loans held for investment [Abstract]
Total non-accrual LHFI, loan balance	16,336,000			16,336,000			21,432,000
Total non-accrual LHFI, Specific reserves	800,000			800,000			2,026,000
Non-accrual loans held for sale [Abstract]
Total non-accrual LHFS, Loan balance	1,419,000			1,419,000			1,572,000
Non accrual loans held for sale, Specific reserves	0			0			0
Total non-accrual loans, Loan balance	17,755,000			17,755,000			23,004,000
Valuation allowance related to impaired loans	800,000			800,000			2,026,000
Period decrease in nonaccrual loans				5,200,000
Reduction in existing non accrual loan balances				4,300,000
Addition of non accrual loan balance				1,600,000
Impairment of loans held for sale	53,000		0	153,000		0
Change in the non accrual loans [Abstract]
Charge-offs to the allowance for loan and lease losses	258,000		628,000	2,243,000		781,000	6,271,000
Interest income lost on non-accrual loans	453,000			979,000
Cash collected on non accrual and impaired loan				5,900,000		17,800,000
Amount credited to principal balance outstanding				5,600,000		15,600,000
Summary of impaired loans [Abstract]
Impaired loans with a valuation allowance	8,401,000			8,401,000			9,405,000
Impaired loans without a valuation allowance	17,885,000			17,885,000			19,423,000
Impaired LHFS	1,419,000			1,419,000			1,572,000
Total impaired loans	27,705,000			27,705,000			30,400,000
Valuation allowance related to impaired loans	800,000			800,000			2,026,000
Non-accrual Loans Held For Investment [Member]
Non-accrual loans held for investment [Abstract]
Non-accrual loans transfer to other real estate owned				100,000
Change in the non accrual loans [Abstract]
Charge-offs to the allowance for loan and lease losses				2,200,000
Non accrual Loans Held For Sale [Member]
Non-accrual loans held for sale [Abstract]
Impairment of loans held for sale				153,000
Commercial Real Estate [Member]
Aging analysis of past due payments for each loan portfolio segment [Abstract]
30-59 Days Past Due	176,000			176,000			1,548,000
60-89 Days Past Due	0			0			1,486,000
Accruing 90+Days	0			0			0
Total non-accrual LHFI, loan balance	8,684,000			8,684,000			10,345,000
Current	171,741,000			171,741,000			153,736,000
Subtotal LHFI							167,115,000
Total loans and leases	180,601,000			180,601,000
Non-accrual loans held for investment [Abstract]
Total non-accrual LHFI, loan balance	8,684,000			8,684,000			10,345,000
Total non-accrual LHFI, Specific reserves	605,000			605,000			835,000
Non-accrual loans held for sale [Abstract]
Total non-accrual LHFS, Loan balance	1,419,000			1,419,000			1,572,000
Non accrual loans held for sale, Specific reserves	0			0			0
Valuation allowance related to impaired loans	605,000			605,000			835,000
Summary of impaired loans [Abstract]
Valuation allowance related to impaired loans	605,000			605,000			835,000
Construction and Land Development [Member]
Aging analysis of past due payments for each loan portfolio segment [Abstract]
30-59 Days Past Due	0			0			0
60-89 Days Past Due	0			0			0
Accruing 90+Days	0			0			0
Total non-accrual LHFI, loan balance	2,755,000			2,755,000			4,280,000
Current	31,941,000			31,941,000			32,935,000
Subtotal LHFI	34,696,000			34,696,000			37,215,000
Total loans and leases	34,696,000			34,696,000
Non-accrual loans held for investment [Abstract]
Total non-accrual LHFI, loan balance	2,755,000			2,755,000			4,280,000
Total non-accrual LHFI, Specific reserves	0			0			820,000
Non-accrual loans held for sale [Abstract]
Valuation allowance related to impaired loans	0			0			820,000
Summary of impaired loans [Abstract]
Valuation allowance related to impaired loans	0			0			820,000
Commercial and Industrial [Member]
Aging analysis of past due payments for each loan portfolio segment [Abstract]
30-59 Days Past Due	0			0			200,000
60-89 Days Past Due	0			0			0
Accruing 90+Days	0			0			0
Total non-accrual LHFI, loan balance	3,682,000			3,682,000			4,961,000
Current	63,303,000			63,303,000			35,399,000
Subtotal LHFI							40,560,000
Total loans and leases	66,985,000			66,985,000
Non-accrual loans held for investment [Abstract]
Total non-accrual LHFI, loan balance	3,682,000			3,682,000			4,961,000
Total non-accrual LHFI, Specific reserves	12,000			12,000			255,000
Non-accrual loans held for sale [Abstract]
Valuation allowance related to impaired loans	12,000			12,000			255,000
Summary of impaired loans [Abstract]
Valuation allowance related to impaired loans	12,000			12,000			255,000
Residential real estate [Member]
Aging analysis of past due payments for each loan portfolio segment [Abstract]
30-59 Days Past Due	595,000			595,000			562,000
60-89 Days Past Due	299,000			299,000			486,000
Accruing 90+Days	0			0			0
Total non-accrual LHFI, loan balance	491,000			491,000			994,000
Current	14,488,000			14,488,000			22,939,000
Subtotal LHFI							24,981,000
Total loans and leases	15,873,000			15,873,000
Non-accrual loans held for investment [Abstract]
Total non-accrual LHFI, loan balance	491,000			491,000			994,000
Total non-accrual LHFI, Specific reserves	15,000			15,000			14,000
Non-accrual loans held for sale [Abstract]
Valuation allowance related to impaired loans	15,000			15,000			14,000
Summary of impaired loans [Abstract]
Valuation allowance related to impaired loans	15,000			15,000			14,000
Multi Family [Member]
Aging analysis of past due payments for each loan portfolio segment [Abstract]
30-59 Days Past Due	0			0			0
60-89 Days Past Due	0			0			0
Accruing 90+Days	0			0			0
Total non-accrual LHFI, loan balance	0			0			0
Current	11,736,000			11,736,000			11,756,000
Subtotal LHFI	11,736,000			11,736,000			11,756,000
Total loans and leases	11,736,000			11,736,000
Non-accrual loans held for investment [Abstract]
Total non-accrual LHFI, loan balance	0			0			0
Leases [Member]
Aging analysis of past due payments for each loan portfolio segment [Abstract]
30-59 Days Past Due	194,000			194,000			325,000
60-89 Days Past Due	12,000			12,000			16,000
Accruing 90+Days	0			0			0
Total non-accrual LHFI, loan balance	240,000			240,000			251,000
Current	38,051,000			38,051,000			36,755,000
Subtotal LHFI	38,497,000			38,497,000			37,347,000
Total loans and leases	38,497,000			38,497,000
Non-accrual loans held for investment [Abstract]
Total non-accrual LHFI, loan balance	240,000			240,000			251,000
Total non-accrual LHFI, Specific reserves	67,000			67,000			55,000
Non-accrual loans held for sale [Abstract]
Valuation allowance related to impaired loans	67,000			67,000			55,000
Summary of impaired loans [Abstract]
Valuation allowance related to impaired loans	67,000			67,000			55,000
Tax Certificates [Member]
Aging analysis of past due payments for each loan portfolio segment [Abstract]
30-59 Days Past Due	0			0			0
60-89 Days Past Due	0			0			0
Accruing 90+Days	0			0			0
Total non-accrual LHFI, loan balance	484,000			484,000			601,000
Current	18,094,000			18,094,000			23,968,000
Subtotal LHFI	18,578,000			18,578,000			24,569,000
Total loans and leases	18,578,000			18,578,000
Non-accrual loans held for investment [Abstract]
Total non-accrual LHFI, loan balance	484,000			484,000			601,000
Total non-accrual LHFI, Specific reserves	101,000			101,000			47,000
Non-accrual loans held for sale [Abstract]
Valuation allowance related to impaired loans	101,000			101,000			47,000
Summary of impaired loans [Abstract]
Valuation allowance related to impaired loans	101,000			101,000			47,000
Consumer [Member]
Aging analysis of past due payments for each loan portfolio segment [Abstract]
30-59 Days Past Due	0			0			0
60-89 Days Past Due	0			0			0
Accruing 90+Days	0			0			0
Total non-accrual LHFI, loan balance	0			0			0
Current	901,000			901,000			1,139,000
Subtotal LHFI	901,000			901,000			1,139,000
Total loans and leases	901,000			901,000
Non-accrual loans held for investment [Abstract]
Total non-accrual LHFI, loan balance	$ 0			$ 0			$ 0

[1] For the 2013 period net deferred fees were allocated among the loan types.