Significant Accounting Policies (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 Segment	Dec. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Estimated time period for amortization of intangible assets	20 years or less
Significant Accounting Policies (Textual) [Abstract]
Reportable Segments	3
Maturity period of highly liquid investments	three months or less
Advertising cost incurred	$ 1.2	$ 1.1	$ 1.2
Criteria for recording tax liability based on sustainability upon income tax examination	less than 50%
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	20 years