Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2012

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Options outstanding and exercisable under the Company's 1991 Equity and Performance Incentive Plan

Options outstanding and exercisable as of March 31, 2012 under the Company’s 1991 Equity and Performance Incentive Plan (as Amended and Restated as of April 13, 2009) and changes during the three months ended March 31, 2012, were as follows:

	Number of Shares		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term	Aggregate Intrinsic Value (1)
	(in thousands)		(per share)		(in years)
Outstanding at January 1, 2012	3,201		$	36.70
Expired or forfeited	(400	)	$	36.70
Exercised	(331	)	$	29.93
Granted	539		$	34.89
Outstanding at March 31, 2012	3,009		$	37.12	6	$	13,856
Options exercisable at March 31, 2012	1,910		$	39.76	4	$	7,265
Options vested and expected to vest (2) at March 31, 2012	2,982		$	37.16	6	$	13,697

(1) The aggregate intrinsic value (the difference between the closing price of the Company’s common shares on the last trading day of the first quarter of 2012 and the exercise price, multiplied by the number of “in-the-money” options) that would have been received by the option holders had all option holders exercised their options on March 31, 2012. The amount of aggregate intrinsic value will change based on the fair market value of the Company’s common shares.

(2) The options expected to vest are the result of applying the pre-vesting forfeiture rate assumption to total outstanding non-vested options.

Summarized information on unvested restricted stock units (RSUs), performance shares and deferred shares

The following tables summarize information on non-vested RSUs, performance shares and deferred shares for the three months ended March 31, 2012:

	Number of Shares		Weighted-Average Grant-Date Fair Value
	(in thousands)
RSUs:
Non-Vested at January 1, 2012	717		$	30.69
Forfeited	(29	)	$	29.65
Vested	(130	)	$	24.91
Granted	209		$	34.97
Non-Vested at March 31, 2012	767		$	32.88
Performance Shares (1):
Non-Vested at January 1, 2012	727		$	34.70
Forfeited	(207	)	$	30.55
Vested	(86	)	$	29.25
Granted	285		$	44.25
Non-Vested at March 31, 2012	719		$	40.33
Director Deferred Shares:
Non-Vested at March 31, 2012	19		$	33.98
Vested at March 31, 2012	96		$	33.88
Outstanding at March 31, 2012	115		$	33.90

(1) Non-vested performance shares are based on a maximum potential payout. Actual shares granted at the end of the performance period may be less than the maximum potential payout level depending on achievement of performance share objectives.