Allowance for Loan Losses (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Allowance for Loans Losses
Balance at beginning of the period	$ 19,565	$ 19,412	$ 18,270	$ 18,882
Total loans charged-off	1,801	1,556	3,259	2,229
Total loan recoveries	387	309	1,056	953
Net loans charged-off	1,414	1,247	2,203	1,276
Total provision charged to operating expense	729	209	2,813	768
Balance at the end of the period	18,880	18,374	18,880	18,374
Commercial [Member]
Allowance for Loans Losses
Total loans charged-off	825	358	1,242	358
Total loan recoveries	126	80	196	412
Total provision charged to operating expense	(940)	(391)	802	(305)
Commercial [Member] | Owner occupied real estate [Member]
Allowance for Loans Losses
Total loans charged-off	6	3	138	3
Total loan recoveries	14	52	46	352
Commercial [Member] | Non owner occupied real estate [Member]
Allowance for Loans Losses
Total loans charged-off	45	28	191	28
Total loan recoveries	1		3	7
Commercial [Member] | Residential development [Member]
Allowance for Loans Losses
Total loans charged-off
Total loan recoveries
Commercial [Member] | Development & Spec Land Loans [Member]
Allowance for Loans Losses
Total loans charged-off
Total loan recoveries
Commercial [Member] | Commercial and industrial [Member]
Allowance for Loans Losses
Total loans charged-off	774	327	913	327
Total loan recoveries	111	28	147	53
Real estate [Member]
Allowance for Loans Losses
Total loans charged-off	416	115	559	204
Total loan recoveries	5	2	8	32
Total provision charged to operating expense	675	35	986	646
Real estate [Member] | Residential mortgage [Member]
Allowance for Loans Losses
Total loans charged-off	416	115	559	204
Total loan recoveries	5	2	8	32
Real estate [Member] | Residential construction [Member]
Allowance for Loans Losses
Total loans charged-off
Total loan recoveries
Real estate [Member] | Mortgage warehouse [Member]
Allowance for Loans Losses
Total loans charged-off
Total loan recoveries
Consumer [Member]
Allowance for Loans Losses
Total loans charged-off	560	1,083	1,458	1,667
Total loan recoveries	256	227	852	509
Total provision charged to operating expense	994	565	1,025	427
Consumer [Member] | Direct Installment [Member]
Allowance for Loans Losses
Total loans charged-off	88	58	195	171
Total loan recoveries	54	20	448	35
Consumer [Member] | Direct Installment Purchased [Member]
Allowance for Loans Losses
Total loans charged-off
Total loan recoveries
Consumer [Member] | Indirect Installment [Member]
Allowance for Loans Losses
Total loans charged-off	271	271	624	609
Total loan recoveries	202	189	372	390
Consumer [Member] | Home Equity [Member]
Allowance for Loans Losses
Total loans charged-off	201	754	639	887
Total loan recoveries		$ 18	$ 32	$ 84