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Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2014

In 2014, 2013 and 2012, we recorded share-based compensation and related benefits as follows:



	Year ended December 31,
(Dollars in thousands)	2014			2013			2012
Share-based compensation expense	$	29,545		$	25,413		$	21,861
Income tax benefit related to share-based compensation expense	(9,923		)	(7,989		)	(6,011		)
Capitalized compensation costs	2,048			2,809			2,647

As of December 31, 2014, unrecognized share-based compensation expense was as follows:



(Dollars in thousands)	Unrecognized Expense		Average Expected Recognition Period - in Years
Stock options	$	14,341	2.51
Restricted stock units	30,706		2.42
Total unrecognized share-based compensation expense	$	45,047

The following weighted average assumptions and fair values were used for our employee stock options and restricted stock units:



Equity incentive plan awards	2014			2013			2012
Weighted average expected term of options in years	4.6			4.7			4.6
Weighted average expected volatility of the Company's underlying common stock	35.9		%	44.6		%	50.4		%
Risk-free interest rate	1.72			0.70			0.83
Expected dividend yield	—			—			—
Weighted average grant date fair value-stock options	$	35.65		$	27.28		$	27.00
Weighted average grant date fair value-restricted stock units	107.76			71.57			63.07

The following weighted average assumptions and fair values were used for our ESPP:



ESPP	2014			2013			2012
Expected term in years	0.5			0.5			0.5
Weighted average expected volatility of the Company's underlying common stock	23.7		%	22.3		%	43.5		%
Risk-free interest rate	0.08			0.11			0.11
Expected dividend yield	—			—			—
Weighted average fair value	$	24.00		$	15.35		$	14.43

The table below provides stock option information related to the 2006 Equity Incentive Plan for the year ended December 31, 2014:



	Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life in Years	Aggregate Intrinsic Value of In-The-Money Options
Outstanding at December 31, 2013	1,514,159		$	55.27
Granted	249,303		108.05
Exercised	(330,898	)	47.70
Forfeited	(37,676	)	72.45
Outstanding at December 31, 2014	1,394,888		66.03		4.09	$	69,834,175
Vested and expected to vest at December 31, 2014	1,352,289		65.35		4.04	68,622,901
Exercisable at December 31, 2014	687,696		50.60		2.89	45,022,407

The following table summarizes information regarding stock options outstanding as of December 31, 2014:



	Outstanding Options				Exercisable Options
Range of Exercise Prices	Shares	Weighted Average Remaining Contractual Life in Years	Weighted Average Exercise Price		Shares	Weighted Average Exercise Price
$19.48-45.15	139,582	1.55	$	23.86	137,576	$	23.63
45.16-49.01	101,374	1.64	46.98		99,564	46.98
49.02-60.14	162,117	2.66	50.89		145,697	50.24
60.15-60.51	191,999	3.32	60.37		127,497	60.37
60.52-64.40	269,220	4.33	64.31		114,437	64.30
64.41-67.77	2,842	4.25	64.43		884	64.43
67.78-73.76	274,906	5.33	71.11		60,161	71.11
73.77-107.93	31,639	6.31	99.24		1,880	85.15
107.94-122.55	221,209	6.36	108.43		—	—
	1,394,888	4.09	66.03		687,696	50.60

The table below provides information for restricted stock units under the 2006 Equity Incentive Plan for the year ended December 31, 2014:



	Shares		Weighted Average Grant Date Fair Value
Nonvested at December 31, 2013	682,347		$	65.93
Granted	201,464		107.76
Vested	(233,759	)	63.89
Forfeited	(35,386	)	74.39
Nonvested at December 31, 2014	614,666		79.92

The following table summarizes information regarding stock option and restricted stock activity during 2014, 2013 and 2012:



	Year ended December 31,
(Dollars in thousands)	2014		2013		2012
Total intrinsic value of stock options exercised	$	21,288	$	25,520	$	17,419
Total grant date fair value of stock options vested	20,291		18,168		17,169
Total intrinsic value of restricted stock vested	25,453		14,176		12,747
Total grant date fair value of restricted stock vested	14,935		10,940		10,176