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Stock-Based Compensation (Table)

12 Months Ended

Dec. 31, 2012

Stock based compensation

Stock-based compensation, fair value assumptions

	2012		2011		2010
Expected life	4.5 years		4.3 years		0.9-8.0 years
Expected volatility	40.7%-42.6%		43.4%-44.8%		26.9%-43.9%
Dividend yield	0%		0%		0%
Risk-free interest rate	0.5%-0.9%		0.7%-2.0%		0.4%-3.1%
Estimated annual forfeiture rate	0.0%-9.1%		0.0%-7.8%		0.0%-8.4%

Summary of stock options

		Number of Options			Weighted Average Exercise Price			Weighted Average Grant Date Fair Value			Aggregate Intrinsic Value			Weighted Average Remaining Contractual Life (in years)
Outstanding at December 31, 2009			2,029,000		$	51.37
(1,046,000 exercisable)						54.40
	Granted		831,000			41.98		$	13.75
	Exercised		(317,000)			38.60					$	1,555,000
	Forfeited		(88,000)			44.28
	Expired		(193,000)			61.50
Outstanding at December 31, 2010			2,262,000		$	49.12
(1,151,000 exercisable)						54.64
	Granted		595,000			51.70		$	19.42
	Exercised		(173,000)			37.50					$	2,099,000
	Forfeited		(72,000)			45.97
	Expired		(175,000)			57.05
Outstanding at December 31, 2011			2,437,000		$	50.10
(1,321,000 exercisable)					$	53.68
	Granted		580,000			40.70		$	14.71
	Exercised		(41,000)			34.27					$	205,000
	Forfeited		(97,000)			44.81
	Expired		(116,000)			52.92
Outstanding at December 31, 2012			2,763,000		$	48.43					$	513,000		6.60
(1,657,000 exercisable)					$	51.20					$	513,000		5.30

Summary of nonvested restricted stock units

	Number		Weighted Average Grant Date Fair Value
Nonvested at December 31, 2011	845,000		$	42.48
Granted	468,000			39.75
Vested	(225,000)			32.96
Forfeited	(75,000)			43.74
Nonvested at December 31, 2012	1,013,000		$	43.24

Stock-based compensation

Year Ended December 31,	2012			2011			2010
(Dollars in thousands)
Stock option awards	$	8,471		$	9,549		$	7,179
Restricted stock unit awards		12,300			10,037			10,056
Deferred compensation bonus and matching stock unit awards		240			12			165
Awards under employee stock purchase plan		-			255			314
Awards under Non-Employee Director compensation plan		455			330			330
Total stock-based compensation, before income taxes		21,466			20,183			18,044
Income tax benefit		(8,121)			(7,581)			(6,812)
Total stock-based compensation expense, net of income taxes	$	13,345		$	12,602		$	11,232

Stock-based compensation, allocation by financial statement line item

December 31,			2012			2011			2010
(Dollars in thousands)
Selling, general and administrative expense		$	18,437		$	17,538		$	16,009
System operations			3,029			2,645			2,035
Total stock-based compensation expense		$	21,466		$	20,183		$	18,044

X

- Definition

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