Pension Plan (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Jun. 30, 2015	Sep. 30, 2014	May. 31, 2014
PENSION PLAN
Discount rate used to re-measure pension obligation (as a percent)					4.46%
Components of net periodic pension cost
Service cost				$ 346
Interest cost	$ 78	$ 76	$ 235	231
Expected return on plan assets	(79)	(81)	(237)	(239)
Amortization of loss	64	33	192	103
Net periodic pension cost	63	28	190	441
Contributions paid	$ 230	$ 157	$ 302	$ 345