Common Stock Incentive Plan (Tables)

3 Months Ended

Mar. 31, 2012

Common Stock Incentive Plan [Abstract]

The following table summarizes our common stock grant activity under our Stock Plan. Our common stock grants vest over periods ranging from immediately to 10 years.

	For the three months ended March 31, 2012					For the year ended December 31, 2011
	Number of shares			Weighted average price (1)		Number of shares			Weighted average price (1)
Outstanding nonvested shares, beginning of year		925,526		$	20.21		924,294		$	19.69
Shares granted		235,811			34.57		247,214			33.94
Shares vested		(250,876	)		26.51		(245,487	)		25.26
Shares forfeited		(275	)		26.02		(495	)		31.37
Outstanding nonvested shares, end of each period		910,186		$	26.25		925,526		$	20.21

(1) Grant date fair value.

- Definition

Tabular disclosure of components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate.

+ References+ Details