Subsequent Events (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2012 Banker [Member]	Dec. 31, 2012 External Attorneys [Member]	Jan. 07, 2013 Definitive Agreement to Acquire Reporting Entity [Member]
Subsequent Event [Line Items]
Business Acquisition Acquired Entity Price Paid by Acquiree, Per Share				$ 11.75
Definitive Agreement, Business Acquisition Acquired Entity Purchase Price Paid by Acquirer				$ 293
Definitive Agreement, Business Acquisition Acquired Entity Premium Over Closing Price Paid by Acquirer				22.00%
Legal Fees	0.2
Business Combination, Acquisition Related Costs		0.8	0.7
Business Combination, Acquisition Related Cost Percent of Sales Proceeds		1.00%
Definitive Agreement, Unsuccessful Business Acquisition Costs Expected, Employee Bonuses				$ 1.5