Allowance for Loan Losses (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Allowance for Loans Losses
Balance at beginning of the period	$ 18,374	$ 18,586	$ 18,882	$ 19,064
Loans charged-off	1,167	1,295	3,396	5,211
Net loans charged-off	847	1,040	2,123	4,398
Provision charged to operating expense	320	255	1,273	813
Total provision charged to operating expense	1,041	1,564	1,809	4,444
Balance at the end of the period	18,568	19,110	18,568	19,110
Commercial [Member]
Allowance for Loans Losses
Loans charged-off	394	278	752	726
Provision charged to operating expense	61	9	473	32
Total provision charged to operating expense	625	1,341	320	1,290
Commercial [Member] | Owner occupied real estate [Member]
Allowance for Loans Losses
Loans charged-off	92	65	95	189
Provision charged to operating expense			352	18
Commercial [Member] | Non owner occupied real estate [Member]
Allowance for Loans Losses
Loans charged-off	81	196	109	310
Provision charged to operating expense			7
Commercial [Member] | Residential development [Member]
Allowance for Loans Losses
Loans charged-off
Provision charged to operating expense
Commercial [Member] | Development & Spec Land Loans [Member]
Allowance for Loans Losses
Loans charged-off
Provision charged to operating expense
Commercial [Member] | Commercial and industrial [Member]
Allowance for Loans Losses
Loans charged-off	221	17	548	227
Provision charged to operating expense	61	9	114	14
Real estate [Member]
Allowance for Loans Losses
Loans charged-off	247	86	451	837
Provision charged to operating expense	42		74	10
Total provision charged to operating expense	254	815	900	968
Real estate [Member] | Residential construction [Member]
Allowance for Loans Losses
Loans charged-off
Provision charged to operating expense
Real estate [Member] | Mortgage warehouse [Member]
Allowance for Loans Losses
Loans charged-off
Provision charged to operating expense
Real estate [Member] | Residential mortgage [Member]
Allowance for Loans Losses
Loans charged-off	247	86	451	837
Provision charged to operating expense	42		74	10
Consumer [Member]
Allowance for Loans Losses
Loans charged-off	526	931	2,193	3,648
Provision charged to operating expense	217	246	726	771
Total provision charged to operating expense	162	(592)	589	2,186
Consumer [Member] | Direct Installment Purchased [Member]
Allowance for Loans Losses
Loans charged-off
Provision charged to operating expense
Consumer [Member] | Direct Installment [Member]
Allowance for Loans Losses
Loans charged-off	90	78	261	480
Provision charged to operating expense	28	16	63	83
Consumer [Member] | Indirect Installment [Member]
Allowance for Loans Losses
Loans charged-off	313	494	922	1,280
Provision charged to operating expense	173	179	563	568
Consumer [Member] | Home Equity [Member]
Allowance for Loans Losses
Loans charged-off	123	359	1,010	1,888
Provision charged to operating expense	$ 16	$ 51	$ 100	$ 120