Defined Benefit Plan (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Defined Benefit Plan (Textual) [Abstract]
Employer contributions	$ 174	$ 184	$ 339	$ 371
Additional employer contributions, expected to be paid during the remainder of fiscal year			$ 241