Goodwill & Other Intangible Assets (Details Textual) (USD $) In Millions, unless otherwise specified	0 Months Ended	12 Months Ended
	Oct. 01, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of intangible assets		$ 5.7	$ 5.4	$ 4.6
Acquired finite-lived intangible assets, weighted average useful life	5 years	2 years 11 months