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Stock Compensation Plans Restricted Stock Awards (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011	Dec. 31, 2010
Restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Balance at beginning of year, shares	69,171	[1]
Granted, shares	70,587
Exchanged for common shares, shares	34,084
Cancelled, shares	31,856
Balance at end of year, shares	73,818
Total unrecognized compensation cost	$ 0.4
Unrecognized cost, period for recognition	9 months 18 days
Awards granted, weighted average grant date fair value (per share)	$ 12.73
RSAs earned under long-term performance incentive plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Balance at end of year, shares			5,781
2009 Equity Compensation Plan | Restricted stock awards | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	1 year
2009 Equity Compensation Plan | Restricted stock awards | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Selling, general and administrative expenses | Restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	$ 0.7		$ 0.7	$ 0.5
[1] Includes 5,781 RSAs earned under a long-term performance incentive plan.

X

- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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