Subsequent Events Subsequent events (Details) (Subsequent Event [Member], USD $) In Millions, unless otherwise specified	1 Months Ended
Mar. 31, 2013	Feb. 28, 2013	Jan. 28, 2013 Board of Directors Chairman [Member]
Subsequent Event [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Total Share-based Liabilities Paid			$ 0.2
Severance Costs		1.20
General release of all claims agreement funds paid out	$ 0.1

The charge against earnings in the period for known and estimated costs of termination benefits provided to current employees that are involuntarily terminated under a benefit arrangement associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding costs or losses pertaining to an entity newly acquired in a business combination or a discontinued operation as defined by generally accepted accounting principles and costs associated with one-time termination benefits.

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+ Details