Allowance for Loan Losses ("ALLL") (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Allocation of the allowance to various segments in the loan portfolio
Balance, at the beginning of the period	$ 17,743,000	$ 19,801,000	$ 18,118,000	$ 19,314,000
Charge-offs	(207,000)	(4,941,000)	(867,000)	(8,027,000)
Recoveries	398,000	225,000	683,000	467,000
Provision for loan losses		3,064,000		6,395,000
Balance, at the end of the period	17,934,000	18,149,000	17,934,000	18,149,000
Amount of allowance attributed to:
Specifically evaluated impaired loans	7,292,000		7,292,000		6,061,000
General portfolio allocation	10,642,000		10,642,000		12,057,000
Loans individually evaluated for impairment	15,938,000		15,938,000		17,341,000
Loans collectively evaluated for impairment	730,673,000		730,673,000		672,267,000
General reserves to total loans collectively evaluated for impairment (as a percent)	1.46%		1.46%		1.79%
Total gross loans	746,611,000		746,611,000		689,608,000
Total allowance to gross loans (as a percent)	2.40%		2.40%		2.63%
Provision for loan losses, transfer from C&I to land related to the re-characterization of a loan as part of a TDR	3,900,000
Real Estate Secured
Allocation of the allowance to various segments in the loan portfolio
Balance, at the beginning of the period	6,140,000	7,444,000	6,879,000	9,645,000
Charge-offs	(90,000)	(2,354,000)	(90,000)	(2,365,000)
Recoveries	8,000	38,000	124,000	62,000
Provision for loan losses	451,000	1,769,000	(404,000)	(445,000)
Balance, at the end of the period	6,509,000	6,897,000	6,509,000	6,897,000
Amount of allowance attributed to:
Specifically evaluated impaired loans	29,000		29,000		25,000
General portfolio allocation	6,480,000		6,480,000		6,854,000
Loans individually evaluated for impairment	1,471,000		1,471,000		2,898,000
Loans collectively evaluated for impairment	569,572,000		569,572,000		490,110,000
General reserves to total loans collectively evaluated for impairment (as a percent)	1.14%		1.14%		1.40%
Total gross loans	571,043,000		571,043,000		493,008,000
Total allowance to gross loans (as a percent)	1.14%		1.14%		1.40%
Commercial
Allocation of the allowance to various segments in the loan portfolio
Balance, at the beginning of the period	6,742,000	10,019,000	6,154,000	6,549,000
Charge-offs	(62,000)	(619,000)	(401,000)	(2,761,000)
Recoveries	336,000	171,000	472,000	377,000
Provision for loan losses	(398,000)	(3,310,000)	393,000	2,096,000
Balance, at the end of the period	6,618,000	6,261,000	6,618,000	6,261,000
Amount of allowance attributed to:
Specifically evaluated impaired loans	3,266,000		3,266,000		2,185,000
General portfolio allocation	3,352,000		3,352,000		3,969,000
Loans individually evaluated for impairment	6,229,000		6,229,000		5,596,000
Loans collectively evaluated for impairment	130,893,000		130,893,000		141,468,000
General reserves to total loans collectively evaluated for impairment (as a percent)	2.56%		2.56%		2.81%
Total gross loans	137,122,000		137,122,000		147,064,000
Total allowance to gross loans (as a percent)	4.83%		4.83%		4.18%
Commercial | Commercial and industrial
Amount of allowance attributed to:
Total gross loans	112,115,000		112,115,000		125,340,000
Construction
Allocation of the allowance to various segments in the loan portfolio
Balance, at the beginning of the period	142,000	555,000	313,000	488,000
Charge-offs		(576,000)	(169,000)	(576,000)
Recoveries	1,000		1,000
Provision for loan losses	55,000	402,000	53,000	469,000
Balance, at the end of the period	198,000	381,000	198,000	381,000
Amount of allowance attributed to:
General portfolio allocation	198,000		198,000		313,000
Loans individually evaluated for impairment					1,380,000
Loans collectively evaluated for impairment	10,562,000		10,562,000		18,336,000
General reserves to total loans collectively evaluated for impairment (as a percent)	1.87%		1.87%		1.71%
Total gross loans	10,562,000		10,562,000		19,716,000
Total allowance to gross loans (as a percent)	1.87%		1.87%		1.59%
Land
Allocation of the allowance to various segments in the loan portfolio
Balance, at the beginning of the period	4,578,000	1,604,000	4,670,000	2,416,000
Charge-offs		(1,383,000)	(34,000)	(2,168,000)
Recoveries	31,000	10,000	34,000	13,000
Provision for loan losses	(144,000)	4,252,000	(205,000)	4,222,000
Balance, at the end of the period	4,465,000	4,483,000	4,465,000	4,483,000
Amount of allowance attributed to:
Specifically evaluated impaired loans	3,988,000		3,988,000		3,829,000
General portfolio allocation	477,000		477,000		841,000
Loans individually evaluated for impairment	8,209,000		8,209,000		7,182,000
Loans collectively evaluated for impairment	15,366,000		15,366,000		17,482,000
General reserves to total loans collectively evaluated for impairment (as a percent)	3.10%		3.10%		4.81%
Total gross loans	23,575,000		23,575,000		24,664,000
Total allowance to gross loans (as a percent)	18.94%		18.94%		18.93%
Installment
Allocation of the allowance to various segments in the loan portfolio
Balance, at the beginning of the period	106,000	139,000	64,000	175,000
Charge-offs	(55,000)	(9,000)	(173,000)	(20,000)
Recoveries	22,000	4,000	52,000	13,000
Provision for loan losses	35,000	(43,000)	165,000	(77,000)
Balance, at the end of the period	108,000	91,000	108,000	91,000
Amount of allowance attributed to:
Specifically evaluated impaired loans	9,000		9,000		22,000
General portfolio allocation	99,000		99,000		42,000
Loans individually evaluated for impairment	29,000		29,000		285,000
Loans collectively evaluated for impairment	4,115,000		4,115,000		4,610,000
General reserves to total loans collectively evaluated for impairment (as a percent)	2.41%		2.41%		0.91%
Total gross loans	4,144,000		4,144,000		4,895,000
Total allowance to gross loans (as a percent)	2.61%		2.61%		1.31%
All Other Loans
Allocation of the allowance to various segments in the loan portfolio
Balance, at the beginning of the period	35,000	40,000	38,000	41,000
Charge-offs				(137,000)
Recoveries		2,000		2,000
Provision for loan losses	1,000	(6,000)	(2,000)	130,000
Balance, at the end of the period	36,000	36,000	36,000	36,000
Amount of allowance attributed to:
General portfolio allocation	36,000		36,000		38,000
Loans collectively evaluated for impairment	165,000		165,000		261,000
General reserves to total loans collectively evaluated for impairment (as a percent)	21.82%		21.82%		14.56%
Total gross loans	$ 165,000		$ 165,000		$ 261,000
Total allowance to gross loans (as a percent)	21.82%		21.82%		14.56%