Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2013

Share-based Compensation [Abstract]

Restricted Stock Awards Granted

In the three months ended March 31, 2013, we granted the following restricted stock awards to employees:

(Number of restricted stock shares in thousands)	Shares		Weighted- Average Grant Date Fair Value (per share)
Time-based	428
Performance-based	172	*
Market-based	86	*
Total granted	686		$	53.32

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* Assumes target payout