Loans - Loans Modified for Troubled Debt Restructuring (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($) contract	Sep. 30, 2014 USD ($) contract	Sep. 30, 2015 USD ($) contract	Sep. 30, 2014 USD ($) contract
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	4	0	11	4
Pre-Modification Outstanding Recorded Investment	$ 540	$ 0	$ 1,190	$ 311
Post-Modification Outstanding Recorded Investment	$ 431	$ 0	$ 1,066	$ 302
Commercial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	2	0	2	0
Pre-Modification Outstanding Recorded Investment	$ 52	$ 0	$ 52	$ 0
Post-Modification Outstanding Recorded Investment	$ 31	$ 0	$ 31	$ 0
Commercial real estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	0	3	1
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 256	$ 182
Post-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 249	$ 179
Construction and land development [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	0	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Home equity [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	1	0	1	1
Pre-Modification Outstanding Recorded Investment	$ 106	$ 0	$ 106	$ 8
Post-Modification Outstanding Recorded Investment	$ 106	$ 0	$ 106	$ 8
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	1	0	5	2
Pre-Modification Outstanding Recorded Investment	$ 382	$ 0	$ 776	$ 121
Post-Modification Outstanding Recorded Investment	$ 294	$ 0	$ 680	$ 115
Consumer [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	0	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0