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
	Mar. 31, 2017	Mar. 31, 2016
Available for Sale Securities
Balance at beginning of the period	$ 5,169	$ 5,932
Included in other comprehensive income	11	38
Principal payments	(1,901)	(466)
Ending balance	$ 3,279	$ 5,504