Credit Quality Indicators (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	$ 724,870	$ 716,721
Originated Loans
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	480,176	459,846
Originated Loans | Commercial real estate | Commercial real estate, Owner occupied
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	112,192	112,879
Originated Loans | Commercial real estate | Commercial real estate, Non-owner occupied
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	149,755	139,169
Originated Loans | Commercial real estate | Commercial real estate, Other
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	49,831	50,671
Originated Loans | Commercial
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	168,398	157,127
Acquired Loans
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	244,694	256,875
Acquired Loans | Commercial real estate | Commercial real estate, Owner occupied
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	132,512	131,673
Acquired Loans | Commercial real estate | Commercial real estate, Non-owner occupied
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	27,102	28,045
Acquired Loans | Commercial real estate | Commercial real estate, Other
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	19,397	23,536
Acquired Loans | Commercial
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	65,683	73,621
Pass
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	703,674	696,346
Pass | Originated Loans
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	468,214	447,660
Pass | Originated Loans | Commercial real estate | Commercial real estate, Owner occupied
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	106,803	107,222
Pass | Originated Loans | Commercial real estate | Commercial real estate, Non-owner occupied
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	146,493	135,847
Pass | Originated Loans | Commercial real estate | Commercial real estate, Other
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	49,542	50,376
Pass | Originated Loans | Commercial
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	165,376	154,215
Pass | Acquired Loans
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	235,460	248,686
Pass | Acquired Loans | Commercial real estate | Commercial real estate, Owner occupied
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	129,709	130,028
Pass | Acquired Loans | Commercial real estate | Commercial real estate, Non-owner occupied
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	25,975	26,141
Pass | Acquired Loans | Commercial real estate | Commercial real estate, Other
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	18,723	22,843
Pass | Acquired Loans | Commercial
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	61,053	69,674
Special Mention
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	6,012	4,920
Special Mention | Originated Loans
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	2,423	2,469
Special Mention | Originated Loans | Commercial real estate | Commercial real estate, Owner occupied
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	1,053	1,069
Special Mention | Originated Loans | Commercial real estate | Commercial real estate, Non-owner occupied
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	444	461
Special Mention | Originated Loans | Commercial real estate | Commercial real estate, Other
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	0	0
Special Mention | Originated Loans | Commercial
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	926	939
Special Mention | Acquired Loans
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	3,589	2,451
Special Mention | Acquired Loans | Commercial real estate | Commercial real estate, Owner occupied
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	783	0
Special Mention | Acquired Loans | Commercial real estate | Commercial real estate, Non-owner occupied
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	736	1,340
Special Mention | Acquired Loans | Commercial real estate | Commercial real estate, Other
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	476	476
Special Mention | Acquired Loans | Commercial
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	1,594	635
Substandard
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	15,184	15,455
Substandard | Originated Loans
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	9,539	9,717
Substandard | Originated Loans | Commercial real estate | Commercial real estate, Owner occupied
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	4,336	4,588
Substandard | Originated Loans | Commercial real estate | Commercial real estate, Non-owner occupied
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	2,818	2,861
Substandard | Originated Loans | Commercial real estate | Commercial real estate, Other
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	289	295
Substandard | Originated Loans | Commercial
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	2,096	1,973
Substandard | Acquired Loans
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	5,645	5,738
Substandard | Acquired Loans | Commercial real estate | Commercial real estate, Owner occupied
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	2,020	1,645
Substandard | Acquired Loans | Commercial real estate | Commercial real estate, Non-owner occupied
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	391	564
Substandard | Acquired Loans | Commercial real estate | Commercial real estate, Other
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	198	217
Substandard | Acquired Loans | Commercial
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	3,036	3,312
Doubtful
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	0	0
Doubtful | Originated Loans
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	0	0
Doubtful | Originated Loans | Commercial real estate | Commercial real estate, Owner occupied
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	0	0
Doubtful | Originated Loans | Commercial real estate | Commercial real estate, Non-owner occupied
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	0	0
Doubtful | Originated Loans | Commercial real estate | Commercial real estate, Other
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	0	0
Doubtful | Originated Loans | Commercial
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	0	0
Doubtful | Acquired Loans
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	0	0
Doubtful | Acquired Loans | Commercial real estate | Commercial real estate, Owner occupied
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	0	0
Doubtful | Acquired Loans | Commercial real estate | Commercial real estate, Non-owner occupied
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	0	0
Doubtful | Acquired Loans | Commercial real estate | Commercial real estate, Other
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	0	0
Doubtful | Acquired Loans | Commercial
Financing Receivable Recorded Investment [Line Items]
Total risk category of loans by class of loans	$ 0	$ 0