Benefit Plans (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Supplemental Retirement Plan
Components of net periodic benefit cost:
Service cost	$ 216	$ 179	$ 648	$ 537
Interest cost	221	228	663	684
Amortization of net actuarial loss	96	35	288	105
Net periodic benefit cost	533	442	1,599	1,326
Split-Dollar Life Insurance Benefit Plan
Components of net periodic benefit cost:
Amortization of prior transition obligation	(28)	(25)	(84)	(77)
Interest cost	42	49	126	147
Net periodic benefit cost	$ 14	$ 24	$ 42	$ 70