Loans (Details 6) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current	$ 1,491,410	$ 1,458,159
30-59 days	7,331	8,654
60-89 days	4,394	4,197
90+ days	14,377	21,348
Total Past Due	26,102	34,199
Total Non Accrual	37,798	39,331
Residential Owner Occupied [Member]
Current	131,214	131,014
30-59 days	1,573	1,573
60-89 days	549	220
90+ days	1,161	1,996
Total Past Due	3,283	3,789
Total Non Accrual	1,589	2,490
Residential Non Owner Occupied [Member]
Current	72,958	67,516
30-59 days	598	563
60-89 days	1,063	410
90+ days	1,512	768
Total Past Due	3,173	1,741
Total Non Accrual	4,196	1,397
Residential Real Estate [Member]
Current	204,172	198,530
30-59 days	2,171	2,136
60-89 days	1,612	630
90+ days	2,673	2,764
Total Past Due	6,456	5,530
Total Non Accrual	5,785	3,887
Construction Loans [Member]
Current	16,582	18,288
30-59 days	0	0
60-89 days	0	0
90+ days	0	0
Total Past Due	0	0
Total Non Accrual	0	0
Multi Family [Member]
Current	120,062	125,050
30-59 days	0	1,022
60-89 days	0	0
90+ days	37	443
Total Past Due	37	1,465
Total Non Accrual	727	443
Commercial Real Estate Owner Occupied [Member]
Current	317,578	288,096
30-59 days	2,637	1,468
60-89 days	1,306	993
90+ days	1,888	4,771
Total Past Due	5,831	7,232
Total Non Accrual	9,971	7,691
Commercial Real Estate Non Owner Occupied [Member]
Current	238,125	243,016
30-59 days	16	921
60-89 days	107	1,990
90+ days	2,713	3,384
Total Past Due	2,836	6,295
Total Non Accrual	8,422	10,398
Agriculture Land [Member]
Current	71,714	70,490
30-59 days	353	0
60-89 days	139	0
90+ days	148	456
Total Past Due	640	456
Total Non Accrual	975	1,275
Commercial Real Estate Other Receivable [Member]
Current	34,114	30,056
30-59 days	0	98
60-89 days	0	0
90+ days	3,716	5,951
Total Past Due	3,716	6,049
Total Non Accrual	4,885	8,342
Commercial Real Estate [Member]
Current	661,531	631,658
30-59 days	3,006	2,487
60-89 days	1,552	2,983
90+ days	8,465	14,562
Total Past Due	13,023	20,032
Total Non Accrual	24,253	27,706
Commercial Working Capital [Member]
Current	158,180	137,310
30-59 days	209	0
60-89 days	115	223
90+ days	1,067	242
Total Past Due	1,391	465
Total Non Accrual	1,942	1,410
Commercial Loans Other [Member]
Current	204,184	209,187
30-59 days	382	278
60-89 days	880	59
90+ days	1,777	2,933
Total Past Due	3,039	3,270
Total Non Accrual	4,733	5,481
Commercial Loan [Member]
Current	362,364	346,497
30-59 days	591	278
60-89 days	995	282
90+ days	2,844	3,175
Total Past Due	4,430	3,735
Total Non Accrual	6,675	6,891
Consumer Loan [Member]
Current	16,657	18,736
30-59 days	105	129
60-89 days	13	35
90+ days	15	10
Total Past Due	133	174
Total Non Accrual	15	10
Home Equity [Member]
Current	110,042	119,400
30-59 days	1,458	2,602
60-89 days	222	267
90+ days	343	394
Total Past Due	2,023	3,263
Total Non Accrual	$ 343	$ 394