Disclosures About Fair Value of Assets and Liabilities - Reconciliation of Beginning and Ending Balances of Recurring Fair Value Measurements using Significant Unobservable Level 3 Inputs (Details) - Fair Value, Measurements, Recurring - Available for Sale Securities - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Available for Sale Securities
Balance at beginning of the period	$ 3,279	$ 5,504	$ 5,169	$ 5,932
Included in other comprehensive income	48	59	59	96
Principal payments	3	1	(1,898)	(464)
Ending balance	$ 3,330	$ 5,564	$ 3,330	$ 5,564