Loans (Details 9) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	$ 2,393,692	$ 2,356,489
Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	1,937,117	1,901,149
Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	37,770	32,539
Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	50,773	59,667
Doubtful [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	0	0
Not Graded [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	368,032	363,134
Residential Owner Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	190,805	178,220
Residential Owner Occupied [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	6,404	7,534
Residential Owner Occupied [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	123	99
Residential Owner Occupied [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	2,384	2,367
Residential Owner Occupied [Member] | Doubtful [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	0	0
Residential Owner Occupied [Member] | Not Graded [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	181,894	168,220
Residential Non Owner Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	117,155	97,136
Residential Non Owner Occupied [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	106,130	85,802
Residential Non Owner Occupied [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	717	935
Residential Non Owner Occupied [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	3,179	3,835
Residential Non Owner Occupied [Member] | Doubtful [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	0	0
Residential Non Owner Occupied [Member] | Not Graded [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	7,129	6,564
One To Four Family Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	307,960	275,356
One To Four Family Residential Real Estate [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	112,534	93,336
One To Four Family Residential Real Estate [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	840	1,034
One To Four Family Residential Real Estate [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	5,563	6,202
One To Four Family Residential Real Estate [Member] | Doubtful [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	0	0
One To Four Family Residential Real Estate [Member] | Not Graded [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	189,023	174,784
Multi Family Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	257,715	248,402
Multi Family Residential Real Estate [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	255,385	242,969
Multi Family Residential Real Estate [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	0	2,503
Multi Family Residential Real Estate [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	2,221	2,819
Multi Family Residential Real Estate [Member] | Doubtful [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	0	0
Multi Family Residential Real Estate [Member] | Not Graded [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	109	111
Commercial Real Estate Owner Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	397,410	394,776
Commercial Real Estate Owner Occupied [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	380,638	370,613
Commercial Real Estate Owner Occupied [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	8,211	10,432
Commercial Real Estate Owner Occupied [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	8,459	13,575
Commercial Real Estate Owner Occupied [Member] | Doubtful [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	0	0
Commercial Real Estate Owner Occupied [Member] | Not Graded [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	102	156
Commercial Real Estate Non Owner Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	452,821	404,172
Commercial Real Estate Non Owner Occupied [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	442,837	395,264
Commercial Real Estate Non Owner Occupied [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	5,939	3,464
Commercial Real Estate Non Owner Occupied [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	4,045	5,444
Commercial Real Estate Non Owner Occupied [Member] | Doubtful [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	0	0
Commercial Real Estate Non Owner Occupied [Member] | Not Graded [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	0	0
Agriculture Land [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	129,583	132,231
Agriculture Land [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	109,661	114,776
Agriculture Land [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	3,996	2,639
Agriculture Land [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	15,926	14,816
Agriculture Land [Member] | Doubtful [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	0	0
Agriculture Land [Member] | Not Graded [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	0	0
Commercial Real Estate Other Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	49,866	59,001
Commercial Real Estate Other Receivable [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	47,290	56,133
Commercial Real Estate Other Receivable [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	156	165
Commercial Real Estate Other Receivable [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	1,363	1,788
Commercial Real Estate Other Receivable [Member] | Doubtful [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	0	0
Commercial Real Estate Other Receivable [Member] | Not Graded [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	1,057	915
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	1,029,680	990,180
Commercial Real Estate [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	980,426	936,786
Commercial Real Estate [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	18,302	16,700
Commercial Real Estate [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	29,793	35,623
Commercial Real Estate [Member] | Doubtful [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	0	0
Commercial Real Estate [Member] | Not Graded [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	1,159	1,071
Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	146,794	149,174
Construction Loans [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	128,230	125,519
Construction Loans [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	691	1,254
Construction Loans [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	0	0
Construction Loans [Member] | Doubtful [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	0	0
Construction Loans [Member] | Not Graded [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	17,873	22,401
Commercial Working Capital Or Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	216,341	235,874
Commercial Working Capital Or Other [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	198,150	222,526
Commercial Working Capital Or Other [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	9,338	7,605
Commercial Working Capital Or Other [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	8,853	5,743
Commercial Working Capital Or Other [Member] | Doubtful [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	0	0
Commercial Working Capital Or Other [Member] | Not Graded [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	0	0
Commercial Loans Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	274,687	292,054
Commercial Loans Other [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	262,392	280,013
Commercial Loans Other [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	8,599	3,443
Commercial Loans Other [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	3,696	8,598
Commercial Loans Other [Member] | Doubtful [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	0	0
Commercial Loans Other [Member] | Not Graded [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	0	0
Commercial Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	491,028	527,928
Commercial Loan [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	460,542	502,539
Commercial Loan [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	17,937	11,048
Commercial Loan [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	12,549	14,341
Commercial Loan [Member] | Doubtful [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	0	0
Commercial Loan [Member] | Not Graded [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	0	0
Home Equity and Home Improvement [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	130,709	136,274
Home Equity and Home Improvement [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	0	0
Home Equity and Home Improvement [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	0	0
Home Equity and Home Improvement [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	514	600
Home Equity and Home Improvement [Member] | Doubtful [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	0	0
Home Equity and Home Improvement [Member] | Not Graded [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	130,195	135,674
Consumer Finance [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	29,806	29,175
Consumer Finance [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	0	0
Consumer Finance [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	0	0
Consumer Finance [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	133	82
Consumer Finance [Member] | Doubtful [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	0	0
Consumer Finance [Member] | Not Graded [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	$ 29,673	$ 29,093