Credit Quality and Nonperforming Assets (Past Due and Nonaccrual Loans) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	$ 3,601		$ 6,662
60-89 Days Past Due	297		1,522
90 Days or More Past Due	14,050	[1]	14,820	[2]
Total Past Due	17,948		23,004
Current	1,047,896		947,649
Total Loans	1,065,844		970,653
Non-Accrual Loans	19,766	[3]	20,678	[3]
Consumer loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	38		136
60-89 Days Past Due	5		17
90 Days or More Past Due		[1]		[2]
Total Past Due	43		153
Current	17,401		18,732
Total Loans	17,444		18,885
Non-Accrual Loans	601	[3]	826	[3]
Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	309		618
60-89 Days Past Due
90 Days or More Past Due	487	[1]		[2]
Total Past Due	796		618
Current	27,705		27,128
Total Loans	28,501		27,746
Non-Accrual Loans	487	[3]		[3]
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	1,139		1,346
60-89 Days Past Due	24		153
90 Days or More Past Due	346	[1]	39	[2]
Total Past Due	1,509		1,538
Current	107,954		112,233
Total Loans	109,463		113,771
Non-Accrual Loans	976	[3]	821	[3]
Mortgage warehouse lines [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due
60-89 Days Past Due
90 Days or More Past Due		[1]		[2]
Total Past Due
Current	204,233		106,021
Total Loans	204,233		106,021
Non-Accrual Loans		[3]		[3]
Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	2,115		4,562
60-89 Days Past Due	268		1,352
90 Days or More Past Due	13,217	[1]	14,781	[2]
Total Past Due	15,600		20,695
Current	690,603		683,535
Total Loans	706,203		704,230
Non-Accrual Loans	17,702	[3]	19,031	[3]
Real Estate Loans [Member] | 1-4 Family residential construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	332
60-89 Days Past Due			332
90 Days or More Past Due		[1]		[2]
Total Past Due	332		332
Current	5,419		5,526
Total Loans	5,751		5,858
Non-Accrual Loans		[3]		[3]
Real Estate Loans [Member] | Other Construction/Land [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due			93
60-89 Days Past Due			59
90 Days or More Past Due	3,034	[1]	3,253	[2]
Total Past Due	3,034		3,405
Current	19,757		16,503
Total Loans	22,791		19,908
Non-Accrual Loans	3,209	[3]	3,547	[3]
Real Estate Loans [Member] | 1-4 Family - closed end [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	804		1,125
60-89 Days Past Due			597
90 Days or More Past Due	1,260	[1]	2,874	[2]
Total Past Due	2,064		4,596
Current	134,044		109,663
Total Loans	136,108		114,259
Non-Accrual Loans	1,728	[3]	3,042	[3]
Real Estate Loans [Member] | Equity Lines [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	210		98
60-89 Days Past Due	48		44
90 Days or More Past Due	216	[1]	214	[2]
Total Past Due	474		356
Current	46,757		49,361
Total Loans	47,231		49,717
Non-Accrual Loans	1,138	[3]	1,049	[3]
Real Estate Loans [Member] | Multi-family residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due			185
60-89 Days Past Due	170
90 Days or More Past Due	180	[1]	171	[2]
Total Past Due	350		356
Current	18,266		18,362
Total Loans	18,616		18,718
Non-Accrual Loans	180	[3]	171	[3]
Real Estate Loans [Member] | Commercial real estate - owner occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due	769		1,460
60-89 Days Past Due			26
90 Days or More Past Due	177	[1]	1,316	[2]
Total Past Due	946		2,802
Current	214,150		215,852
Total Loans	215,096		218,654
Non-Accrual Loans	2,856	[3]	3,417	[3]
Real Estate Loans [Member] | Commercial real estate - Non-owner occupied [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due			604
60-89 Days Past Due			294
90 Days or More Past Due	7,467	[1]	6,953	[2]
Total Past Due	7,467		7,851
Current	124,198		124,226
Total Loans	131,665		132,077
Non-Accrual Loans	7,658	[3]	7,754	[3]
Real Estate Loans [Member] | Farmland [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 Days Past Due			997
60-89 Days Past Due	50
90 Days or More Past Due	883	[1]		[2]
Total Past Due	933		997
Current	128,012		144,042
Total Loans	128,945		145,039
Non-Accrual Loans	$ 933	[3]	$ 51	[3]

[1] As of March 31, 2015 there were no loans over 90 days past due and still acrruing.

[2] As of December 31, 2014 there were no loans over 90 days past due and still accruing.

[3] Included in total financing receivables