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Stock-Based Compensation (Details 10) (Common Stock Units and Share Awards [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Common Stock Units and Share Awards [Member]
Summary of weighted average grant date fair value of common stock units and share awards
Granted, shares
Weighted average grant-date fair value
Fair value of vested	$ 113	$ 112

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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