Goodwill and Intangible Assets (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Goodwill and Intangible Assets (Textual) [Abstract]
Goodwill	$ 31.8	$ 31.8
Amortization expense associated with identifiable intangible assets	1.5	1.5
Estimated total amortization expense 2012	1.4
Estimated total amortization expense 2013	0.5
Estimated total amortization expense 2014	0.3
Estimated total amortization expense 2015	0.2
Estimated total amortization expense 2016	$ 0.2