SHARE-BASED COMPENSATION AND BENEFIT PLANS (Tables)

12 Months Ended

Dec. 31, 2012

Summary of Stock Option Activity

A summary of stock option activity under the 2001 Plan as of December 31, 2012, and changes during 2012, is as follows:

	Options			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value
Options outstanding at January 1, 2012		385,150		$	47.82
Granted		80,500			71.52
Exercised		(135,500	)		41.63
Forfeited		(5,000	)		55.04
Expired		(1,000	)		37.28
Options outstanding at December 31, 2012		324,150		$	56.21		2.94	$	6,060
Options exercisable at December 31, 2012		57,567		$	28.62		1.35	$	2,664

Summary of Non-Vested (Restricted) Stock Activity

A summary of non-vested (restricted) stock activity as of December 31, 2012, and changes during 2012, is shown below:

	Shares		Weighted- Average Grant Date Fair Value
Non-vested (restricted) stock outstanding at January 1, 2012		2,261,948	$	37.23
Granted		111,301		69.66
Vested		—		—
Forfeited		—		—
Non-vested (restricted) stock outstanding at December 31, 2012		2,373,249	$	38.75

Weighted-Average Assumptions Relating to Valuation of Our Stock Options

The weighted-average assumptions relating to the valuation of our stock options were as follows:

Years Ended December 31,	2012			2011			2010
Expected term in years		4.25			4.25			4.25
Risk-free interest rate		0.57	%		1.12	%		1.14	%
Expected volatility		31.40	%		32.59	%		33.35	%
Expected dividend yield		3.49	%		3.48	%		3.65	%