8. Troubled Debt Restructuring (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2016 USD ($) Integer	Jun. 30, 2016 USD ($) Integer	Jun. 30, 2017 USD ($) Integer
Number of Contracts | Integer	5	6
Pre-Modification Outstanding Recorded Investment	$ 189	$ 206
Post-Modification Outstanding Recorded Investment	$ 189	$ 206
Number of Contracts | Integer	6	6
Pre-Modification Outstanding Recorded Investment	$ 1,544	$ 1,544
Post-Modification Outstanding Recorded Investment	$ 1,544	$ 1,544
Consumer [Member]
Number of Contracts | Integer	2	3
Pre-Modification Outstanding Recorded Investment	$ 19	$ 36
Post-Modification Outstanding Recorded Investment	$ 19	$ 36
Number of Contracts | Integer	1	1	1
Pre-Modification Outstanding Recorded Investment	$ 16	$ 16	$ 20
Post-Modification Outstanding Recorded Investment	$ 16	$ 16	$ 20
Real Estate [Member]
Number of Contracts | Integer	2	2
Pre-Modification Outstanding Recorded Investment	$ 143	$ 143
Post-Modification Outstanding Recorded Investment	$ 143	$ 143
Number of Contracts | Integer	5	5	1
Pre-Modification Outstanding Recorded Investment	$ 1,528	$ 1,528	$ 67
Post-Modification Outstanding Recorded Investment	$ 1,528	$ 1,528	$ 67
Commercial [Member]
Number of Contracts | Integer	1	1
Pre-Modification Outstanding Recorded Investment	$ 27	$ 27
Post-Modification Outstanding Recorded Investment	$ 27	$ 27