Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2016

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Schedule of Unvested Restricted Stock Awards

The following table sets forth the number of unvested restricted stock awards and the weighted-average fair value of these awards at the date of grant:


	Restricted Awards			Weighted Average Fair Value at Grant Date		Aggregate Intrinsic Value⁽¹⁾($000s)
Unvested balance December 31, 2015		241,140		$	25.82
Granted		308,146		$	20.56
Forfeited		(12,419	)	$	21.42
Vested		(42,976	)	$	26.34
Unvested balance, December 31, 2016		493,891		$	22.60	$	12,550

⁽¹⁾

The aggregate intrinsic value is calculated as the market value of our common stock as of December 30, 2016. The market value as of December 30, 2016 was $25.41 per share, which was the closing price of our common stock reported for transactions effected on the NASDAQ Global Select Market on December 30, 2016, the final trading day of 2016.

Performance Awards

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Schedule of Unvested Performance-based Restricted Stock Units Awards

The following table sets forth the number of unvested PSUs and the weighted-average fair value of these awards at the date of grant:

	Performance Awards		Weighted Average Fair Value at Grant Date		Aggregate Intrinsic Value⁽¹⁾($000s)
Unvested balance December 31, 2015		60,970	$	21.82
Granted		101,660	$	20.71
Forfeited		—	$	—
Vested		—	$	—
Unvested balance, December 31, 2016		162,630	$	21.13	$	4,132

⁽¹⁾

Schedule of Assumptions used to Value PSUs Granted

The following table summarizes the assumptions used to value the PSUs granted during the year ended December 31, 2016 and for the period from April 24, 2015 to December 31, 2015:

	Year Ended December 31, 2016			Period from April 24 - December 31, 2015
Expected term (years)		3.0			2.9
Expected volatility		48.8	%		26.6	%
Expected annual dividend		0.0	%		0.0	%
Risk free rate		0.9	%		0.9	%