Loans (Details 7) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current	$ 1,505,902	$ 1,458,159
30-59 days	6,245	8,654
60-89 days	4,928	4,197
90+ days	13,015	21,378
Total Past Due	24,188	34,199
Total Non Accrual	32,557	39,331
Residential Owner Occupied [Member]
Current	125,362	131,014
30-59 days	1,238	1,573
60-89 days	604	220
90+ days	945	1,996
Total Past Due	2,787	3,789
Total Non Accrual	1,125	2,490
Residential Non Owner Occupied [Member]
Current	71,777	67,516
30-59 days	413	563
60-89 days	126	410
90+ days	849	768
Total Past Due	1,388	1,741
Total Non Accrual	2,473	1,397
Residential Real Estate [Member]
Current	197,139	198,530
30-59 days	1,651	2,136
60-89 days	730	630
90+ days	1,794	2,764
Total Past Due	4,175	5,530
Total Non Accrual	3,598	3,887
Construction Loans [Member]
Current	19,296	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	122,455	125,050
30-59 days	0	1,022
60-89 days	0	0
90+ days	0	443
Total Past Due	0	1,465
Total Non Accrual	1,178	443
Commercial Real Estate Owner Occupied [Member]
Current	321,071	288,096
30-59 days	1,248	1,468
60-89 days	382	993
90+ days	1,622	4,771
Total Past Due	3,252	7,232
Total Non Accrual	9,652	7,691
Commercial Real Estate Non Owner Occupied [Member]
Current	235,592	243,016
30-59 days	134	921
60-89 days	1,321	1,990
90+ days	2,480	3,384
Total Past Due	3,935	6,295
Total Non Accrual	6,674	10,398
Agriculture Land [Member]
Current	72,092	70,490
30-59 days	84	0
60-89 days	31	0
90+ days	0	456
Total Past Due	115	456
Total Non Accrual	813	1,275
Commercial Real Estate Other Receivable [Member]
Current	36,510	30,056
30-59 days	21	98
60-89 days	875	0
90+ days	3,560	5,951
Total Past Due	4,456	6,049
Total Non Accrual	4,761	8,342
Commercial Real Estate [Member]
Current	665,265	631,658
30-59 days	1,487	2,487
60-89 days	2,609	2,983
90+ days	7,662	14,562
Total Past Due	11,758	20,032
Total Non Accrual	21,900	27,706
Commercial Working Capital [Member]
Current	161,110	137,310
30-59 days	0	0
60-89 days	155	223
90+ days	1,204	242
Total Past Due	1,359	465
Total Non Accrual	1,528	1,410
Commercial Loans Other [Member]
Current	218,477	209,187
30-59 days	584	278
60-89 days	1,201	59
90+ days	2,138	2,933
Total Past Due	3,923	3,270
Total Non Accrual	4,136	5,481
Commercial Loan [Member]
Current	379,587	346,497
30-59 days	584	278
60-89 days	1,356	282
90+ days	3,342	3,175
Total Past Due	5,282	3,735
Total Non Accrual	5,664	6,891
Consumer Loan [Member]
Current	15,702	18,736
30-59 days	229	129
60-89 days	8	35
90+ days	0	10
Total Past Due	237	174
Total Non Accrual	0	10
Home Equity [Member]
Current	106,458	119,400
30-59 days	2,294	2,602
60-89 days	225	267
90+ days	217	394
Total Past Due	2,736	3,263
Total Non Accrual	$ 217	$ 394