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Stock-based Compensation (Tables)

3 Months Ended

Mar. 31, 2013

Weighted-Average Assumptions Used to Estimate Grant Date Fair Values for Stock Options Granted

Weighted-average assumptions used to estimate the grant date fair values for stock options granted for the three month periods ended March 31, 2013 and 2012 follow:

		Three Months Ended March  31,
		2013				2012
Volatility			46.19	%			48.72	%
Expected term (in years)			5.00				5.00
Dividend yield			1.07	%			1.00	%
Risk-free interest rate			0.72	%			0.83	%

Stock Option Activity

Stock option activity from January 1, 2013 to March 31, 2013 follows:

		Underlying Shares				Weighted Average Exercise Price
Outstanding at January 1, 2013			7,827,195			$	20.35
Granted			60,000			$	18.63
Exercised			(1,150,000	)		$	16.19
Cancelled			—			$	—
Expired			—			$	—
Outstanding at March 31, 2013			6,737,195			$	21.04
Exercisable at March 31, 2013			5,738,036			$	21.49

Restricted Stock Activity

Restricted stock activity from January 1, 2013 to March 31, 2013 follows:

		Shares				Weighted Average Grant Date Fair Value
Non-vested restricted stock outstanding at January 1, 2013			1,279,146			$	20.03
Granted			18,000			$	18.63
Vested			(56,668	)		$	22.20
Forfeited			(15,570	)		$	19.68
Non-vested restricted stock outstanding at March 31, 2013			1,224,908			$	19.92

Restricted Stock Unit Activity

Restricted stock unit activity from January 1, 2013 to March 31, 2013 follows:

		Shares				Weighted Average Grant Date Fair Value
Non-vested restricted stock units outstanding at January 1, 2013			17,670			$	20.08
Granted			—			$	—
Vested			—			$	—
Forfeited			—			$	—
Non-vested restricted stock units outstanding at March 31, 2013			17,670			$	20.08

Stock-Settled Performance Units

The total target number of shares with respect to the Stock-Settled Performance Units is set forth below:

		2012 Performance Unit Awards				2011 Performance Unit Awards				2010 Performance Unit Awards
Target number of shares			192,000				144,375				178,750

Fair value of Stock-Settled Performance Units

The fair value of the Stock-Settled Performance Units is set forth below (in thousands):

		2012 Performance Unit Awards				2011 Performance Unit Awards				2010 Performance Unit Awards
Fair value at date of grant		$	3,065			$	5,569			$	3,117

Compensation Expense Associated with Stock-Settled Performance Units

Compensation expense associated with the Stock-Settled Performance Units is shown below (in thousands):

		2012 Performance Unit Awards				2011 Performance Unit Awards				2010 Performance Unit Awards
Three months ended March 31, 2013		$	255			$	464			$	260
Three months ended March 31, 2012			NA			$	464			$	260

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