Retirement Benefits (Details Textual)	3 Months Ended	6 Months Ended
Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 Executive Participant	Jun. 30, 2012
Retirement Benefits (Textual) [Abstract]
Number of participants admitted in program			0
Number of executive officers participate in program			0
Discount rate used to determine net periodic pension cost	3.55%	4.48%	3.55%	4.48%

The interest rate used to adjust for the time value of money.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (k)(1)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920

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