Allowance for Loan Losses ("ALLL") (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Allocation of the allowance to various segments in the loan portfolio
Balance, at the beginning of the period	$ 18,118	$ 19,314
Charge-offs	(660)	(3,086)
Recoveries	285	242
Provision for loan losses		3,331
Balance, at the end of the period	17,743	19,801
Amount of allowance attributed to:
Specifically evaluated impaired loans	6,261		6,061
General portfolio allocation	11,482		12,057
Loans individually evaluated for impairment	13,559		17,341
Loans collectively evaluated for impairment	691,321		672,267
General reserves to total loans collectively evaluated for impairment (as a percent)	1.66%		1.79%
Total gross loans	704,880		689,608
Total allowance to gross loans (as a percent)	2.52%		2.63%
Real Estate Secured
Allocation of the allowance to various segments in the loan portfolio
Balance, at the beginning of the period	6,879	9,645
Charge-offs		(11)
Recoveries	116	24
Provision for loan losses	(855)	(2,214)
Balance, at the end of the period	6,140	7,444
Amount of allowance attributed to:
Specifically evaluated impaired loans	101		25
General portfolio allocation	6,039		6,854
Loans individually evaluated for impairment	1,364		2,898
Loans collectively evaluated for impairment	515,224		490,110
General reserves to total loans collectively evaluated for impairment (as a percent)	1.17%		1.40%
Total gross loans	516,588		493,008
Total allowance to gross loans (as a percent)	1.19%		1.40%
Commercial
Allocation of the allowance to various segments in the loan portfolio
Balance, at the beginning of the period	6,154	6,549
Charge-offs	(339)	(2,142)
Recoveries	136	206
Provision for loan losses	791	5,406
Balance, at the end of the period	6,742	10,019
Amount of allowance attributed to:
Specifically evaluated impaired loans	2,037		2,185
General portfolio allocation	4,705		3,969
Loans individually evaluated for impairment	4,700		5,596
Loans collectively evaluated for impairment	144,163		141,468
General reserves to total loans collectively evaluated for impairment (as a percent)	3.26%		2.81%
Total gross loans	148,863		147,064
Total allowance to gross loans (as a percent)	4.53%		4.18%
Construction
Allocation of the allowance to various segments in the loan portfolio
Balance, at the beginning of the period	313	488
Charge-offs	(169)
Provision for loan losses	(2)	67
Balance, at the end of the period	142	555
Amount of allowance attributed to:
General portfolio allocation	142		313
Loans individually evaluated for impairment			1,380
Loans collectively evaluated for impairment	10,894		18,336
General reserves to total loans collectively evaluated for impairment (as a percent)	1.30%		1.71%
Total gross loans	10,894		19,716
Total allowance to gross loans (as a percent)	1.30%		1.59%
Land
Allocation of the allowance to various segments in the loan portfolio
Balance, at the beginning of the period	4,670	2,416
Charge-offs	(34)	(785)
Recoveries	3	3
Provision for loan losses	(61)	(30)
Balance, at the end of the period	4,578	1,604
Amount of allowance attributed to:
Specifically evaluated impaired loans	4,090		3,829
General portfolio allocation	488		841
Loans individually evaluated for impairment	7,394		7,182
Loans collectively evaluated for impairment	16,422		17,482
General reserves to total loans collectively evaluated for impairment (as a percent)	2.97%		4.81%
Total gross loans	23,816		24,664
Total allowance to gross loans (as a percent)	19.22%		18.93%
Installment
Allocation of the allowance to various segments in the loan portfolio
Balance, at the beginning of the period	64	175
Charge-offs	(118)	(11)
Recoveries	30	9
Provision for loan losses	130	(34)
Balance, at the end of the period	106	139
Amount of allowance attributed to:
Specifically evaluated impaired loans	33		22
General portfolio allocation	73		42
Loans individually evaluated for impairment	101		285
Loans collectively evaluated for impairment	4,426		4,610
General reserves to total loans collectively evaluated for impairment (as a percent)	1.65%		0.91%
Total gross loans	4,527		4,895
Total allowance to gross loans (as a percent)	2.34%		1.31%
All Other Loans
Allocation of the allowance to various segments in the loan portfolio
Balance, at the beginning of the period	38	41
Charge-offs		(137)
Provision for loan losses	(3)	136
Balance, at the end of the period	35	40
Amount of allowance attributed to:
General portfolio allocation	35		38
Loans collectively evaluated for impairment	192		261
General reserves to total loans collectively evaluated for impairment (as a percent)	18.23%		14.56%
Total gross loans	$ 192		$ 261
Total allowance to gross loans (as a percent)	18.23%		14.56%