Employee Benefit Plans (Details Textual) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2014 plan	Jun. 30, 2013	Jun. 30, 2014 plan	Jun. 30, 2013
Compensation and Retirement Disclosure [Abstract]
Number of total defined benefit plans	3		3
Number of repair pension plans	2		2
Expenses related to qualified defined contribution plans	$ 300	$ 250	$ 500	$ 496

Amount of discretionary contributions made by an employer to a defined contribution plan.

No definition available.

Name:	us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration