Defined Benefit Plan (Details Textual) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Defined Benefit Plan (Textual) [Abstract]
Employer contributions	$ 184	$ 178	$ 371	$ 361
Additional employer contributions, expected to be paid during the remainder of fiscal year			$ 334