v2.4.0.6

Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2012

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

Schedule of assumptions used in estimating fair value of stock options using Black-Scholes option pricing model

In determining the estimated fair value of our stock options as of the date of grant, we used the Black-Scholes option pricing model with the following assumptions:

	2012			2011			2010
Risk-free interest rate	0.68 - 1.39%			1.22 - 2.78%			2.00 - 3.45%
Dividend yield	6.75	%		6.75	%		6.75	%
Volatility factors of the expected market price for our common stock	35.9 - 42.9%			35.7 - 44.3%			37.1 - 44.6%
Weighted average expected life of options	4.25 - 7.0 years			4.25 - 7.0 years			4.25 - 7.0 years

Summary of stock option activity

The following is a summary of stock option activity in 2012:

	Shares			Range of Exercise Prices		Weighted Average Exercise Price				Weighted Average Remaining Contractual Life (years)		Intrinsic Value ($000’s)
Outstanding as of December 31, 2011	2,047,005			$11.45 - $57.19		$	42.10
Options granted	459,015			55.13 - 55.69		55.58
Options exercised	(596,021	)		11.45 - 57.19		36.14
Outstanding as of December 31, 2012	1,909,999			11.86 - 57.19		47.20				6.9		$	33,469
Exercisable as of December 31, 2012	1,488,579			$11.86 - $57.19		$	44.96			6.3		$	29,410

Summary of status of nonvested stock options and changes during the year

A summary of the status of our nonvested stock options as of December 31, 2012 and changes during the year then ended follows:

	Shares			Weighted Average Grant Date Fair Value
Nonvested at beginning of year	361,040			$	10.76
Granted	459,015			10.54
Vested	(398,629	)		10.40
Nonvested at end of year	421,426			$	10.86

Summary of status of nonvested restricted stock and restricted stock units and changes during the year

A summary of the status of our nonvested restricted stock and restricted stock units as of December 31, 2012, and changes during the year ended December 31, 2012 follows:

	Restricted Stock			Weighted Average Grant Date Fair Value				Restricted Stock Units			Weighted Average Grant Date Fair Value
Nonvested at December 31, 2011	592,198			$	50.09			33,289			$	50.04
Granted	276,484			55.61				4,112			55.13
Vested	(271,224	)		50.12				(30,576	)		50.65
Forfeited	(5,574	)		49.36				—			—
Nonvested at December 31, 2012	591,884			$	52.66			6,825			$	50.34

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Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year.

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Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (f)(2)

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Tabular disclosure of the number and weighted-average grant date fair value for nonvested stock options that were outstanding at the beginning and end of the year and that were granted, forfeited or vested during the year.

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