Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Net accumulated other comprehensive income:
Net unrealized gain on investment securities available-for-sale	$ 947	$ (10,143)
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	(434)	(23)
Net actuarial loss on defined benefit post-retirement benefit plans	1,483	2,038
Net accumulated other comprehensive income	$ 1,996	$ (8,128)