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Loans - Impaired Loans - Recorded Investment, Unpaid Principal Balance and Related Allowance (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Recorded Investment
With no related allowance recorded	$ 22,259	$ 20,725
With an allowance recorded	864	161
Total impaired loans	23,123	20,886
Unpaid Principal Balance
With no related allowance recorded	26,830	24,718
With an allowance recorded	1,242	166
Total impaired loans	28,072	24,884
Related Allowance
With an allowance recorded	514	34
Commercial
Recorded Investment
With no related allowance recorded	382	70
With an allowance recorded		3
Unpaid Principal Balance
With no related allowance recorded	464	149
With an allowance recorded		8
Related Allowance
With an allowance recorded		3
Real estate - commercial | Owner occupied general purpose
Recorded Investment
With no related allowance recorded	2,509	2,314
Unpaid Principal Balance
With no related allowance recorded	2,807	3,004
Real estate - commercial | Owner occupied special purpose
Recorded Investment
With no related allowance recorded	397	763
Unpaid Principal Balance
With no related allowance recorded	525	871
Real estate - commercial | Non-owner occupied general purpose
Recorded Investment
With no related allowance recorded	2,263	1,047
With an allowance recorded	264
Unpaid Principal Balance
With no related allowance recorded	2,458	1,065
With an allowance recorded	603
Related Allowance
With an allowance recorded	264
Real estate - commercial | Non-owner occupied special purpose
Recorded Investment
With no related allowance recorded	1,013
Unpaid Principal Balance
With no related allowance recorded	1,649
Real estate - commercial | Retail properties
Recorded Investment
With no related allowance recorded	1,980
Unpaid Principal Balance
With no related allowance recorded	2,364
Real estate - commercial | Farm
Recorded Investment
With no related allowance recorded		1,272
Unpaid Principal Balance
With no related allowance recorded		1,338
Real estate - residential | Investor
Recorded Investment
With no related allowance recorded	1,822	1,906
Unpaid Principal Balance
With no related allowance recorded	2,156	2,259
Real estate - residential | Owner occupied
Recorded Investment
With no related allowance recorded	9,294	10,539
With an allowance recorded	600	112
Unpaid Principal Balance
With no related allowance recorded	10,720	11,999
With an allowance recorded	639	112
Related Allowance
With an allowance recorded	250	31
Real estate - residential | Revolving and junior liens
Recorded Investment
With no related allowance recorded	2,322	2,731
With an allowance recorded		46
Unpaid Principal Balance
With no related allowance recorded	3,336	3,947
With an allowance recorded		46
Consumer
Recorded Investment
With no related allowance recorded	201
Unpaid Principal Balance
With no related allowance recorded	268
Construction Loans | Real estate - commercial | Commercial speculative
Recorded Investment
With no related allowance recorded	76	83
Unpaid Principal Balance
With no related allowance recorded	$ 83	$ 86

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