Allowance for Loan Losses (Details 4) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Aging of recorded investment in loans by past due category and class of loans
30-59 Days Past Due	$ 9,142	$ 21,884
60-89 Days Past Due	3,347	4,532
Greater than 90 days Past Due	14,744	18,650
Total Past Due	27,233	45,066
Current	1,780,973	1,816,866
Total	1,808,206	1,861,932
First Liens
Aging of recorded investment in loans by past due category and class of loans
30-59 Days Past Due	1,732	8,359
60-89 Days Past Due	1,573	1,659
Greater than 90 days Past Due	2,480	4,599
Total Past Due	5,785	14,617
Current	335,621	336,230
Total	341,406	350,847
Home Equity
Aging of recorded investment in loans by past due category and class of loans
30-59 Days Past Due	113	143
60-89 Days Past Due	31	15
Greater than 90 days Past Due	62	24
Total Past Due	206	182
Current	42,627	43,317
Total	42,833	43,499
Junior Liens
Aging of recorded investment in loans by past due category and class of loans
30-59 Days Past Due	199	555
60-89 Days Past Due	173	98
Greater than 90 days Past Due	505	586
Total Past Due	877	1,239
Current	33,722	36,535
Total	34,599	37,774
Motor Vehicle
Aging of recorded investment in loans by past due category and class of loans
30-59 Days Past Due	2,868	4,164
60-89 Days Past Due	482	600
Greater than 90 days Past Due	98	182
Total Past Due	3,448	4,946
Current	243,599	241,303
Total	247,047	246,249
Commercial & Industrial
Aging of recorded investment in loans by past due category and class of loans
30-59 Days Past Due	1,428	1,315
60-89 Days Past Due	820	861
Greater than 90 days Past Due	7,255	3,616
Total Past Due	9,503	5,792
Current	467,641	487,160
Total	477,144	492,952
Farmland
Aging of recorded investment in loans by past due category and class of loans
30-59 Days Past Due	189	534
60-89 Days Past Due	0	0
Greater than 90 days Past Due	65	1,122
Total Past Due	254	1,656
Current	84,843	87,270
Total	85,097	88,926
Non Farm, Non Residential
Aging of recorded investment in loans by past due category and class of loans
30-59 Days Past Due	1,558	5,618
60-89 Days Past Due	48	1,004
Greater than 90 days Past Due	3,866	2,449
Total Past Due	5,472	9,071
Current	265,855	290,023
Total	271,327	299,094
Agriculture
Aging of recorded investment in loans by past due category and class of loans
30-59 Days Past Due	395	137
60-89 Days Past Due	0	0
Greater than 90 days Past Due	2	78
Total Past Due	397	215
Current	121,016	130,404
Total	121,413	130,619
All Other Commercial
Aging of recorded investment in loans by past due category and class of loans
30-59 Days Past Due	204	568
60-89 Days Past Due	195	202
Greater than 90 days Past Due	363	350
Total Past Due	762	1,120
Current	95,895	81,453
Total	96,657	82,573
Multifamily
Aging of recorded investment in loans by past due category and class of loans
30-59 Days Past Due	357	52
60-89 Days Past Due	0	0
Greater than 90 days Past Due	48	5,641
Total Past Due	405	5,693
Current	58,626	49,019
Total	59,031	54,712
All Other Residential
Aging of recorded investment in loans by past due category and class of loans
30-59 Days Past Due	0	214
60-89 Days Past Due	0	0
Greater than 90 days Past Due	0	0
Total Past Due	0	214
Current	9,757	10,834
Total	9,757	11,048
All Other Consumer
Aging of recorded investment in loans by past due category and class of loans
30-59 Days Past Due	99	225
60-89 Days Past Due	25	93
Greater than 90 days Past Due	0	3
Total Past Due	124	321
Current	21,771	23,318
Total	$ 21,895	$ 23,639