Loans Receivable and Allowance for Loan Losses (Past Due Financing Receivables) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]
30-59 Days Past Due	$ 17,196	$ 9,706
60 to 89 Days Past Due	398	390
Greater than 90 Days	16,152	11,312
Total Past Due	33,746	21,408
Current	589,608	568,308
Total loans receivable	623,354	589,716
Loans Receivable > 90 Days and Accruing		748
Commercial real estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
30-59 Days Past Due	13,963	8,662
60 to 89 Days Past Due	398	390
Greater than 90 Days	8,293	1,880
Total Past Due	22,654	10,932
Current	321,495	333,445
Total loans receivable	344,149	344,377
Construction and land development [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
30-59 Days Past Due	263
Greater than 90 Days	3,100	4,022
Total Past Due	3,363	4,022
Current	26,381	31,039
Total loans receivable	29,744	35,061
Commercial and industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
30-59 Days Past Due	1,307
Greater than 90 Days	3,403	4,673
Total Past Due	4,710	4,673
Current	103,955	82,995
Total loans receivable	108,665	87,668
Loans Receivable > 90 Days and Accruing		748
Owner occupied real estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
30-59 Days Past Due	1,654	1,043
Greater than 90 Days	505
Total Past Due	2,159	1,043
Current	115,800	101,734
Total loans receivable	117,959	102,777
Consumer and other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
30-59 Days Past Due	9	1
Greater than 90 Days	851	737
Total Past Due	860	738
Current	19,510	15,945
Total loans receivable	20,370	16,683
Residential mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Current	2,467	3,150
Total loans receivable	$ 2,467	$ 3,150