Allowance for Loan and Lease Losses - Changes in Allowance for Loan and Lease Losses (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Allowance for Loan and Leases Losses [Roll Forward]
Beginning balance	$ 17,261	$ 16,380
Charge-offs	(1,985)	(153)
Recoveries	364	143
Provision	(251)	84
Ending balance	15,389	16,454
Ending balance: related to loans individually evaluated for impairment	155	175
Ending balance: related to loans collectively evaluated for impairment	15,234	16,279
LHFI [Abstract]
Ending balance	358,055	400,675	344,682
Ending balance: individually evaluated for impairment	22,753	36,870
Ending balance: collectively evaluated for impairment	335,302	363,805
Commercial Real Estate [Member]
Allowance for Loan and Leases Losses [Roll Forward]
Beginning balance	8,750	7,744
Charge-offs	(835)	0
Recoveries	104	3
Provision	84	149
Ending balance	8,103	7,896
Ending balance: related to loans individually evaluated for impairment	0	0
Ending balance: related to loans collectively evaluated for impairment	8,103	7,896
LHFI [Abstract]
Ending balance	175,397	180,123
Ending balance: individually evaluated for impairment	8,484	12,846
Ending balance: collectively evaluated for impairment	166,913	167,277
Construction and Land Development [Member]
Allowance for Loan and Leases Losses [Roll Forward]
Beginning balance	2,987	2,523
Charge-offs	(820)	0
Recoveries	95	104
Provision	(184)	(178)
Ending balance	2,078	2,449
Ending balance: related to loans individually evaluated for impairment	0	0
Ending balance: related to loans collectively evaluated for impairment	2,078	2,449
LHFI [Abstract]
Ending balance	34,533	49,399
Ending balance: individually evaluated for impairment	4,466	13,728
Ending balance: collectively evaluated for impairment	30,067	35,671
Commercial and Industrial [Member]
Allowance for Loan and Leases Losses [Roll Forward]
Beginning balance	1,924	2,331
Charge-offs	(173)	0
Recoveries	4	2
Provision	958	21
Ending balance	2,713	2,354
Ending balance: related to loans individually evaluated for impairment	45	47
Ending balance: related to loans collectively evaluated for impairment	2,668	2,307
LHFI [Abstract]
Ending balance	67,512	52,794
Ending balance: individually evaluated for impairment	8,750	6,173
Ending balance: collectively evaluated for impairment	58,762	46,621
Multi Family [Member]
Allowance for Loan and Leases Losses [Roll Forward]
Beginning balance	654	531
Charge-offs	0	0
Recoveries	0	0
Provision	4	84
Ending balance	658	615
Ending balance: related to loans individually evaluated for impairment	0	0
Ending balance: related to loans collectively evaluated for impairment	658	615
LHFI [Abstract]
Ending balance	11,830	13,735
Ending balance: individually evaluated for impairment	0	1,688
Ending balance: collectively evaluated for impairment	11,830	12,047
Residential Real Estate [Member]
Allowance for Loan and Leases Losses [Roll Forward]
Beginning balance	1,098	1,188
Charge-offs	0	0
Recoveries	151	1
Provision	(1,081)	5
Ending balance	168	1,194
Ending balance: related to loans individually evaluated for impairment	13	20
Ending balance: related to loans collectively evaluated for impairment	155	1,174
LHFI [Abstract]
Ending balance	6,697	27,155
Ending balance: individually evaluated for impairment	431	1,334
Ending balance: collectively evaluated for impairment	6,266	25,821
Leases [Member]
Allowance for Loan and Leases Losses [Roll Forward]
Beginning balance	1,108	1,311
Charge-offs	(147)	(133)
Recoveries	0	8
Provision	100	109
Ending balance	1,061	1,295
Ending balance: related to loans individually evaluated for impairment	70	53
Ending balance: related to loans collectively evaluated for impairment	991	1,242
LHFI [Abstract]
Ending balance	38,629	37,468
Ending balance: individually evaluated for impairment	71	76
Ending balance: collectively evaluated for impairment	38,558	37,392
Tax Certificates [Member]
Allowance for Loan and Leases Losses [Roll Forward]
Beginning balance	472	425
Charge-offs	(10)	(20)
Recoveries	10	25
Provision	(88)	(24)
Ending balance	384	406
Ending balance: related to loans individually evaluated for impairment	27	55
Ending balance: related to loans collectively evaluated for impairment	357	351
LHFI [Abstract]
Ending balance	22,541	39,056
Ending balance: individually evaluated for impairment	551	1,025
Ending balance: collectively evaluated for impairment	21,990	38,031
Consumer [Member]
Allowance for Loan and Leases Losses [Roll Forward]
Beginning balance	29	20
Charge-offs	0	0
Recoveries	0	0
Provision	(11)	0
Ending balance	18	20
Ending balance: related to loans individually evaluated for impairment	0	0
Ending balance: related to loans collectively evaluated for impairment	18	20
LHFI [Abstract]
Ending balance	916	945
Ending balance: individually evaluated for impairment	0	0
Ending balance: collectively evaluated for impairment	916	945
Unallocated [Member]
Allowance for Loan and Leases Losses [Roll Forward]
Beginning balance	239	307
Charge-offs	0	0
Recoveries	0	0
Provision	(33)	(82)
Ending balance	206	225
Ending balance: related to loans individually evaluated for impairment	0	0
Ending balance: related to loans collectively evaluated for impairment	206	225
LHFI [Abstract]
Ending balance	0	0
Ending balance: individually evaluated for impairment	0	0
Ending balance: collectively evaluated for impairment	$ 0	$ 0