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Stock-Based Compensation Plans (Tables)

6 Months Ended

Jun. 30, 2017

Summary of Stock Options Issued Pursuant to Stock Incentive Plans

A summary of stock options issued pursuant to the Company’s stock incentive plans is as follows:

		Number of Shares				Weighted- Average Exercise Price				Weighted- Average Remaining Contractual Term (Years)				Aggregate Intrinsic Value  of In-the-Money Options
Outstanding as of December 31, 2016			6,791,375			$	15.54
Granted			864,800				20.12
Exercised			(608,157	)			13.07
Forfeited			(186,190	)			18.50
Expired			(17,507	)			20.36
Outstanding as of June 30, 2017			6,844,321			$	16.25				6.80			$	41,895,512
Exercisable as of June 30, 2017			4,086,269			$	14.50				5.50			$	32,153,661

Summary of Nonvested Restricted Share Awards and Changes During Period

A summary of nonvested restricted share awards (“RSAs”) as of June 30, 2017 and changes during the period are as follows:

Nonvested Restricted Share Awards		Number of Restricted Share Awards				Weighted-Average Grant Date Fair Value
Nonvested as of December 31, 2016			172,108			$	20.62
Granted			560,174				20.61
Vested			(113,693	)			20.86
Forfeited			(46,367	)			20.47
Nonvested as of June 30, 2017			572,222			$	20.57

Black-Scholes Option-Pricing Model [Member]

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

For options that do not vest based on the achievement of certain market conditions the grant date fair values were estimated on the date of grant using the Black-Scholes option-pricing model, a pricing model acceptable under U.S. GAAP, with the following weighted-average assumptions:

		Six Months Ended June 30, 2017				Six Months Ended June 30, 2016
Expected life (years)			5.6				5.9
Interest rate			1.9	%			1.2	%
Volatility			29.4	%			29.7	%
Dividend yield			—				—

Monte Carlo Simulation [Member]

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

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:

		Six Months Ended June 30, 2016
Expected life (years)			7.5
Interest rate			1.6	%
Volatility			41.6	%
Dividend yield			—

LTIP Performance Shares [Member]

Summary of Nonvested Performance Share Awards and Changes During Period

A summary of nonvested long-term incentive program performance share awards (“LTIP Performance Shares”) outstanding as of June 30, 2017 and changes during the period are as follows:

Nonvested LTIP Performance Shares		Number of Shares at Expected Attainment				Weighted- Average Grant Date Fair Value
Nonvested as of December 31, 2016			1,738,056			$	18.45
Granted			553,549				20.12
Forfeited			(115,365	)			18.60
Nonvested as of June 30, 2017			2,176,240			$	18.87

Total Shareholder Return [Member] | Monte Carlo Simulation [Member]

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:

		Six Months Ended June 30, 2017
Expected life (years)			2.9
Interest rate			1.5	%
Volatility			26.5	%
Dividend Yield			—

TSR Plan [Member]

Summary of Nonvested Performance Share Awards and Changes During Period

A summary of nonvested TSRs outstanding as of June 30, 2017 and changes during the period 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
Nonvested as of June 30, 2017			224,453			$	24.37

Performance-Based Restricted Share Awards [Member]

Summary of Nonvested Performance Share Awards and Changes During Period

A summary of nonvested Performance-Based Restricted Share Awards (“PBRSAs”) as of June 30, 2017 and changes during the period 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, 2016			683,667			$	23.25
Vested			(484,835	)			22.82
Forfeited			(11,604	)			23.84
Change in attainment for 2015 grants			(13,592	)			23.25
Nonvested as of June 30, 2017			173,636			$	24.41

Retention RSAs [Member]

Summary of Nonvested Restricted Share Awards and Changes During Period

A summary of nonvested Retention Restricted Share Awards (“Retention RSAs”) as of June 30, 2017 and changes during the period 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, 2016			205,540			$	17.89
Vested			(151,871	)			17.89
Nonvested as of June 30, 2017			53,669			$	17.89

Restricted share awards (RSAs) [Member] | PAY.ON [Member]

Summary of Nonvested Restricted Share Awards and Changes During Period

A summary of nonvested PAY.ON RSAs as of June 30, 2017 and changes during the period are as follows:

Nonvested PAY.ON RSAs		Number of PAY.ON RSAs				Grant Date Fair Value
Nonvested at December 31, 2016			238,376			$	23.60
Forfeited			(119,188	)			23.60
Vested			(59,594	)			23.60
Nonvested at June 30, 2017			59,594			$	23.60

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Tabular disclosure of the changes in outstanding nonvested performance-based units.

+ 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)(2)
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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 2
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