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Note 19. Share-Based Compensation (Details) - Stock Awards (Independent Members Of Board Of Directors [Member], USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Independent Members Of Board Of Directors [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]
Shared Awarded	37,993	12,266	5,149
Share-based compensation expense	$ 0.8	$ 0.9	$ 0.7

The compensation expense recognized during the period pertaining to the deferred compensation arrangement.

The number of shares issued pursuant to the terms of the deferred compensation plan as of the balance sheet date.