Share-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2017

For the three and nine months ended September 30, 2017 and 2016, we recorded share-based compensation and related tax benefits as follows:



	Three months ended September 30,						Nine months ended September 30,
(Dollars in thousands)	2017			2016			2017			2016
Share-based compensation expense	$	8,644		$	7,916		$	27,739		$	22,342
Income tax benefit related to share-based compensation expense	(3,154		)	(2,881		)	(9,518		)	(7,461		)

As of September 30, 2017, unrecognized share-based compensation expense was as follows:



(Dollars in thousands)	Unrecognized Expense		Weighted Average Expected Recognition Period - in Years
Stock options	$	10,935	2.72
Restricted stock units	56,513		2.74
Total unrecognized share-based compensation expense	$	67,448

The table below provides stock option information related to the 2006 Equity Incentive Plan for the nine months ended September 30, 2017:



	Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life - in Years	Aggregate Intrinsic Value of In-The- Money Options
Outstanding at December 31, 2016	1,010,557		$	87.24
Granted	113,535		178.23
Exercised	(232,370	)	70.79
Forfeited	(9,491	)	111.48
Outstanding at September 30, 2017	882,231		103.02		3.80	$	74,172,891
Vested and expected to vest at September 30, 2017	857,176		101.94		3.74	72,987,562
Exercisable at September 30, 2017	533,847		83.46		2.73	55,323,524

The table below provides information for restricted stock units under the 2006 Equity Incentive Plan for the nine months ended September 30, 2017:



	Shares		Weighted Average Grant Date Fair Value
Nonvested at December 31, 2016	670,969		$	106.64
Granted	239,847		180.05
Vested	(223,561	)	102.00
Forfeited	(38,871	)	122.77
Nonvested at September 30, 2017	648,384		134.43