Allowance for Loan and Lease Losses - Changes in Allowance for Loan and Lease Losses (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Allowance for Loan and Leases Losses [Roll Forward]
Beginning balance	$ 15,389	$ 16,454	$ 17,261	$ 16,380	$ 16,380
Charge-offs	(258)	(628)	(2,243)	(781)	(6,271)
Recoveries	211	154	575	297	1,155
Provision	(163)	1,515	(414)	1,599	5,997
Ending balance	15,179	17,495	15,179	17,495	17,261
Ending balance: related to loans individually evaluated for impairment	800	1,875	800	1,875	2,026
Ending balance: related to loans collectively evaluated for impairment	14,379	15,620	14,379	15,620	15,235
LHFI [Abstract]
Ending balance	367,867	372,836	367,867	372,836	344,682
Ending balance: individually evaluated for impairment	25,795	32,955	25,795	32,955	28,828
Ending balance: collectively evaluated for impairment	342,072	339,881	342,072	339,881	315,854
Commercial Real Estate [Member]
Allowance for Loan and Leases Losses [Roll Forward]
Beginning balance	8,103	7,896	8,750	7,744	7,744
Charge-offs	0	0	(835)	0	(1,313)
Recoveries	23	0	127	3	3
Provision	(174)	(217)	(90)	(68)	2,316
Ending balance	7,952	7,679	7,952	7,679	8,750
Ending balance: related to loans individually evaluated for impairment	605	0	605	0	835
Ending balance: related to loans collectively evaluated for impairment	7,347	7,679	7,347	7,679	7,915
LHFI [Abstract]
Ending balance	180,601	166,315	180,601	166,315	167,115
Ending balance: individually evaluated for impairment	13,022	12,674	13,022	12,674	10,958
Ending balance: collectively evaluated for impairment	167,579	153,641	167,579	153,641	156,157
Construction and Land Development [Member]
Allowance for Loan and Leases Losses [Roll Forward]
Beginning balance	2,078	2,449	2,987	2,523	2,523
Charge-offs	0	0	(820)	0	(2,452)
Recoveries	95	87	191	191	816
Provision	(156)	1,202	(341)	1,024	2,100
Ending balance	2,017	3,738	2,017	3,738	2,987
Ending balance: related to loans individually evaluated for impairment	0	1,243	0	1,243	820
Ending balance: related to loans collectively evaluated for impairment	2,017	2,495	2,017	2,495	2,167
LHFI [Abstract]
Ending balance	34,696	46,548	34,696	46,548	37,215
Ending balance: individually evaluated for impairment	4,082	10,712	4,082	10,712	5,943
Ending balance: collectively evaluated for impairment	30,614	35,836	30,614	35,836	31,272
Commercial and Industrial [Member]
Allowance for Loan and Leases Losses [Roll Forward]
Beginning balance	2,713	2,354	1,924	2,331	2,331
Charge-offs	(21)	(208)	(195)	(208)	(586)
Recoveries	6	55	9	57	67
Provision	(233)	5	727	26	112
Ending balance	2,465	2,206	2,465	2,206	1,924
Ending balance: related to loans individually evaluated for impairment	12	139	12	139	255
Ending balance: related to loans collectively evaluated for impairment	2,453	2,067	2,453	2,067	1,669
LHFI [Abstract]
Ending balance	66,985	47,567	66,985	47,567	40,560
Ending balance: individually evaluated for impairment	8,038	5,643	8,038	5,643	10,251
Ending balance: collectively evaluated for impairment	58,947	41,924	58,947	41,924	30,309
Multi Family [Member]
Allowance for Loan and Leases Losses [Roll Forward]
Beginning balance	658	615	654	531	531
Charge-offs	0	0	0	0	(542)
Recoveries	0	0	0	0	0
Provision	(70)	331	(66)	415	665
Ending balance	588	946	588	946	654
Ending balance: related to loans individually evaluated for impairment	0	439	0	439	0
Ending balance: related to loans collectively evaluated for impairment	588	507	588	507	654
LHFI [Abstract]
Ending balance	11,736	13,008	11,736	13,008	11,756
Ending balance: individually evaluated for impairment	0	1,673	0	1,673	0
Ending balance: collectively evaluated for impairment	11,736	11,335	11,736	11,335	11,756
Residential Real Estate [Member]
Allowance for Loan and Leases Losses [Roll Forward]
Beginning balance	168	1,194	1,098	1,188	1,188
Charge-offs	0	0	0	0	(111)
Recoveries	5	1	156	2	208
Provision	180	(70)	(901)	(65)	(187)
Ending balance	353	1,125	353	1,125	1,098
Ending balance: related to loans individually evaluated for impairment	15	22	15	22	14
Ending balance: related to loans collectively evaluated for impairment	338	1,103	338	1,103	1,084
LHFI [Abstract]
Ending balance	15,873	26,556	15,873	26,556	24,981
Ending balance: individually evaluated for impairment	0	1,325	0	1,325	994
Ending balance: collectively evaluated for impairment	15,873	25,231	15,873	25,231	23,987
Leases [Member]
Allowance for Loan and Leases Losses [Roll Forward]
Beginning balance	1,061	1,295	1,108	1,311	1,311
Charge-offs	(99)	(162)	(108)	(295)	(465)
Recoveries	10	7	20	15	32
Provision	27	72	(21)	181	230
Ending balance	999	1,212	999	1,212	1,108
Ending balance: related to loans individually evaluated for impairment	67	32	67	32	55
Ending balance: related to loans collectively evaluated for impairment	932	1,180	932	1,180	1,053
LHFI [Abstract]
Ending balance	38,497	37,775	38,497	37,775	37,347
Ending balance: individually evaluated for impairment	169	35	169	35	81
Ending balance: collectively evaluated for impairment	38,328	37,740	38,328	37,740	37,266
Tax Certificates [Member]
Allowance for Loan and Leases Losses [Roll Forward]
Beginning balance	384	406	472	425	425
Charge-offs	(138)	(258)	(285)	(278)	(802)
Recoveries	72	4	72	29	29
Provision	268	180	327	156	820
Ending balance	586	332	586	332	472
Ending balance: related to loans individually evaluated for impairment	101	0	101	0	47
Ending balance: related to loans collectively evaluated for impairment	485	332	485	332	425
LHFI [Abstract]
Ending balance	18,578	34,094	18,578	34,094	24,569
Ending balance: individually evaluated for impairment	484	893	484	893	601
Ending balance: collectively evaluated for impairment	18,094	33,201	18,094	33,201	23,968
Consumer [Member]
Allowance for Loan and Leases Losses [Roll Forward]
Beginning balance	18	20	29	20	20
Charge-offs	0	0	0	0	0
Recoveries	0	0	0	0	0
Provision	0	0	(11)	0	9
Ending balance	18	20	18	20	29
Ending balance: related to loans individually evaluated for impairment	0	0	0	0	0
Ending balance: related to loans collectively evaluated for impairment	18	20	18	20	29
LHFI [Abstract]
Ending balance	901	973	901	973	1,139
Ending balance: individually evaluated for impairment	0	0	0	0	0
Ending balance: collectively evaluated for impairment	901	973	901	973	1,139
Unallocated [Member]
Allowance for Loan and Leases Losses [Roll Forward]
Beginning balance	206	225	239	307	307
Charge-offs	0	0	0	0	0
Recoveries	0	0	0	0	0
Provision	(5)	12	(38)	(70)	(68)
Ending balance	201	237	201	237	239
Ending balance: related to loans individually evaluated for impairment	0	0	0	0	0
Ending balance: related to loans collectively evaluated for impairment	201	237	201	237	239
LHFI [Abstract]
Ending balance	0	0	0	0	0
Ending balance: individually evaluated for impairment	0	0	0	0	0
Ending balance: collectively evaluated for impairment	$ 0	$ 0	$ 0	$ 0	$ 0