Equity Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2015

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

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

The fair value of each option granted was estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted-average assumptions for the years ended December 31:

	2015		2014		2013
Risk-free interest rate	1.8	%	1.6	%	1.7	%
Expected life	5.5 years		5.1 years		5.2 years
Expected volatility	43	%	46	%	65	%
Expected dividend yield	—	%	—	%	—	%

Schedule of Nonvested Share Activity

The following is a summary of the option activity as of December 31, 2015 and changes during the year then ended:

In thousands except per share amounts and years

	Shares	Weighted-Average Exercise Price		Weighted- Average Remaining Contractual Term (years)	Aggregate Intrinsic Value
Outstanding at December 31, 2014	609	$	14.81
Granted	92	$	36.74
Exercised	(166)	$	10.21
Forfeited/Cancelled	(72)	$	19.08
Outstanding at December 31, 2015	463	$	20.15	7.2	$	7,213
Options exercisable at December 31, 2015	241	$	12.37	5.6	$	5,569
Expected to vest at December 31, 2015	209	$	28.55	9.0	$	1,556

Schedule of Nonvested Restricted Stock Units Activity

The following is a summary of the Company’s unvested restricted shares for the year ended and as of December 31, 2015:

In thousands except per share amounts
Outstanding Restricted Shares	Shares	Weighted-Average Grant-Date Fair Value
Outstanding at December 31, 2014	459	$	19.17
Granted	72	$	34.09
Vested	(41)	$	14.69
Forfeited/Cancelled	(147)	$	16.43
Outstanding at December 31, 2015	343	$	24.01
Expected to vest at December 31, 2015	307	$	25.88