Summary of Nonvested Restricted Share Awards and Changes During Period

A summary of nonvested RSAs are as follows:


Nonvested Restricted Share Awards	Number of Restricted Share Awards			Weighted-Average Grant Date Fair Value
Nonvested at December 31, 2014		183,209		$	17.11
Granted		125,026			23.82
Vested		(158,973	)		17.21

Nonvested at December 31, 2015		149,262			22.62
Granted		148,322			20.19
Vested		(114,219	)		22.64
Forfeited		(11,257	)		21.01

Nonvested at December 31, 2016		172,108			20.62
Granted		560,174			20.61
Vested		(120,869	)		20.72
Forfeited		(108,176	)		20.39

Nonvested at December 31, 2017		503,237		$	20.63

Estimated Fair Value of Options Granted Pricing Model with Weighted-Average Assumptions

Carlo simulation model is used. With respect to options granted that vest based on the achievement of certain market conditions, the grant date fair value of such options was estimated using the following weighted-average assumptions:


	Years Ended December 31,
	2016			2015
Expected life (years)		7.5			7.5
Risk-free interest rate		1.6	%		1.7	%
Expected volatility		41.6	%		41.9	%
Expected dividend yield		—			—

Estimated Fair Value of Options Granted Pricing Model with Weighted-Average Assumptions

The fair value of options granted in the respective fiscal years are estimated on the date of grant using the Black-Scholes option-pricing model, acceptable under ASC 718, with the following weighted-average assumptions:


	Years Ended December 31,
	2017			2016			2015
Expected life (years)		5.6			5.9			5.9
Risk-free interest rate		1.9	%		1.2	%		1.4	%
Expected volatility		29.4	%		29.7	%		32.1	%
Expected dividend yield		—			—			—

Summary of Nonvested Performance Share Awards and Changes During Period

A summary of nonvested TSRs are as follows:


Nonvested Total Shareholder Return Awards	Number of Shares at Expected Attainment			Weighted- Average Grant Date Fair Value
Nonvested as of December 31, 2016		—		$	—
Granted		233,077			24.37
Forfeited		(8,624	)		24.37
Change in Attainment in 2017		(80,804	)		24.37

Nonvested as of December 31, 2017		143,649		$	24.37

Summary of Nonvested Performance Share Awards and Changes During Period

A summary of the nonvested LTIP Performance Shares are as follows:


Nonvested LTIP Performance Shares	Number of Shares at Expected Attainment			Weighted- Average Grant Date Fair Value
Nonvested at December 31, 2014		1,145,916		$	14.84
Granted		1,025,863			19.12
Vested		(548,671	)		9.75
Forfeited		(205,510	)		19.39
Change in expected attainment for 2011 and 2013 grants		(528,303	)		19.44

Nonvested at December 31, 2015		889,295			19.13
Granted		1,059,428			17.92
Forfeited		(210,667	)		18.61

Nonvested at December 31, 2016		1,738,056			18.45
Granted		553,549			20.12
Forfeited		(201,441	)		18.87
Change in expected attainment for 2015 and 2016 grants		(965,129	)		18.75

Nonvested at December 31, 2017		1,125,035		$	18.94

Estimated Fair Value of Options Granted Pricing Model with Weighted-Average Assumptions

The grant date fair value of the TSRs was estimated using the following weighted-average assumptions:


	Year Ended
	December 31, 2017
Expected life (years)		2.9
Interest rate		1.5	%
Volatility		26.5	%
Dividend Yield		—

Summary of Nonvested Performance Share Awards and Changes During Period

A summary of nonvested PBRSAs are as follows:


Nonvested Performance-Based Restricted Share Awards	Number of Performance-Based Restricted Share Awards			Weighted-Average Grant Date Fair Value
Nonvested as of December 31, 2014		—		$	—
Granted		978,365			23.45
Forfeited		(39,502	)		24.24

Nonvested as of December 31, 2015		938,863			23.42
Forfeited		(67,397	)		22.34
Vested		(169,567	)		24.41
Change in attainment for 2015 grants		(18,232	)		24.41

Nonvested as of December 31, 2016		683,667			23.25
Forfeited		(11,604	)		23.84
Vested		(484,835	)		22.82
Change in attainment for 2015 grants		(13,592	)		23.25

Nonvested as of December 31, 2017		173,636		$	24.41

Summary of Nonvested Restricted Share Awards and Changes During Period

A summary of nonvested Retention RSAs are as follows:


Nonvested Retention Restricted Share Awards	Number of Retention Restricted Share Awards			Weighted-Average Grant Date Fair Value
Nonvested as of December 31, 2015		—		$	—
Granted		473,069			17.89
Vested		(226,526	)		17.89
Forfeited		(41,003	)		17.89

Nonvested as of December 31, 2016		205,540			17.89
Vested		(205,540	)		17.89

Nonvested as of December 31, 2017		—		$	—

Summary of Nonvested Restricted Share Awards and Changes During Period

A summary of nonvested PAY.ON RSAs are as follows:


Nonvested PAY.ON RSAs	Number of PAY.ON RSAs			Grant Date Fair Value
Nonvested at December 31, 2014		—		$	—
Granted		476,750			23.60

Nonvested at December 31, 2015		476,750			23.60
Vested		(238,374	)		23.60

Nonvested at December 31, 2016		238,376			23.60
Forfeited		(119,188	)		23.60
Vested		(119,188	)		23.60

Nonvested at December 31, 2017		—		$	—