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Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Fair Value of Option Grants

The fair value of option grants are estimated on the grant date using the Black-Scholes option-pricing model with the following weighted-average assumptions for option grants during the periods indicated below.

		Year Ended December 31,
		2016				2015				2014
Expected volatility			46.04	%			47.15	%			42.68	%
Expected dividends			0.00	%			0.00	%			0.00	%
Expected term (in years)			5.80				6.15				6.21
Risk-free rate			1.32	%			1.62	%			1.94	%

Summary of Company's Stock Option Plan Activity

The following table summarizes the stock option activity for the year ended December 31, 2016:

In thousands, except per share amounts		Number of Shares				Weighted-Average Exercise Price Per Share				Weighted-Average Remaining Contractual Life (Years)				Aggregate Intrinsic Value
Options outstanding at January 1, 2016			1,044			$	13.36
Granted			329				17.49
Exercised			(203	)			12.52
Forfeited			(4	)			15.66
Expired			—				—
Options outstanding at December 31, 2016			1,166			$	14.66				6.3			$	13,754
Options exercisable at December 31, 2016			683			$	13.09				4.9			$	9,127
Available for grant at December 31, 2016			161

Summary of Additional Stock Option Information

The following table provides additional stock option information for the periods indicated:

		Year Ended December 31,
In thousands, except per share amounts		2016				2015				2014
Weighted-average grant date fair value per share		$	7.74			$	7.13			$	7.83
Intrinsic value of options exercised		$	1,397			$	1,524			$	584
Fair value of stock options that vested		$	2,131			$	1,207			$	1,484

Summary of Restricted Stock Unit Activity

The following table summarizes restricted stock unit activity during the year ended December 31, 2016:

In thousands, except per unit amounts		Units				Weighted-Average Grant Date Fair Value Per Unit
Non-vested units, beginning of the year			124			$	15.55
Granted			73				17.02
Vested			—				—
Forfeited			(33	)			16.22
Non-vested units, at December 31, 2016			164			$	16.07

Summary of Additional Restricted Stock Unit Information

The following table provides additional restricted stock unit information for the periods indicated:

		Year Ended December 31,
		2016				2015				2014
Weighted-average grant date fair value per unit		$	17.02			$	14.89			$	17.76

Summary of Cash-Settled Performance Units Activity

The following table summarizes cash-settled performance unit activity during the year ended December 31, 2016:

In thousands, except per unit amounts		Units				Weighted-Average Grant Date Fair Value Per Unit
Non-vested units, beginning of the year			1,923			$	1.00
Granted			1,252				1.00
Vested			—				—
Forfeited			(534	)			1.00
Non-vested units, at December 31, 2016			2,641			$	1.00

Summary of Restricted Stock Activity

The following table summarizes restricted stock activity during the year ended December 31, 2016:

In thousands, except per share amounts		Shares				Weighted-Average Grant Date Fair Value Per Share
Non-vested shares, beginning of the year			23			$	16.74
Granted			37				16.37
Vested			(21	)			16.62
Forfeited			—				—
Non-vested shares, at December 31, 2016			39			$	16.46

Summary of Additional Restricted Stock Information

The following table provides additional restricted stock information.

		Year Ended December 31,
In thousands, except per share amounts		2016				2015				2014
Weighted-average grant date fair value per share		$	16.37			$	15.36			$	16.23
Fair value of restricted stock awards that vested		$	347			$	2,198			$	224

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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