Share-Based Compensation (Tables)

6 Months Ended

Jun. 30, 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 June 30, 2012 under the Company’s 1991 Equity and Performance Incentive Plan (as Amended and Restated as of April 13, 2009) and changes during the six months endedJune 30, 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	(447	)	$	37.24
Exercised	(532	)	$	30.05
Granted	570		$	34.98
Outstanding at June 30, 2012	2,792		$	37.53	6	$	9,293
Options exercisable at June 30, 2012	1,669		$	40.83	4	$	4,470
Options vested and expected to vest (2) at June 30, 2012	2,761		$	37.59	6	$	9,152

(1) The aggregate intrinsic value (the difference between the closing price of the Company’s common shares on the last trading day of the second 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 June 30, 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 table summarizes information on non-vested RSUs, performance shares and deferred shares for the six months endedJune 30, 2012:

	Number of Shares		Weighted-Average Grant-Date Fair Value
	(in thousands)
RSUs:
Non-Vested at January 1, 2012	717		$	30.69
Forfeited	(44	)	$	30.43
Vested	(127	)	$	24.84
Granted	235		$	35.31
Non-Vested at June 30, 2012	781		$	33.05
Performance Shares (1):
Non-Vested at January 1, 2012	727		$	34.70
Forfeited	(216	)	$	31.01
Vested	(86	)	$	29.25
Granted	301		$	44.25
Non-Vested at June 30, 2012	726		$	40.40
Director Deferred Shares:
Non-Vested at January 1, 2012	19		$	33.98
Vested	(19	)	$	33.98
Granted	28		$	40.54
Non-Vested at June 30, 2012	28		$	40.54
Vested at June 30, 2012	115		$	33.90
Outstanding at June 30, 2012	143		$	35.22

(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.