Equity Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2014

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:

	2014		2013		2012
Risk-free interest rate	1.6	%	1.7	%	1.4	%
Expected life	5.1 years		5.2 years		5.7 years
Expected volatility	46	%	65	%	68	%
Expected dividend yield	—	%	—	%	—	%

Schedule of Nonvested Share Activity

The following is a summary of the option activity as of December 31, 2014 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, 2013	758	$	10.32
Granted	132	$	27.96
Exercised	(277)	$	8.87
Forfeited/Cancelled	(4)	$	9.24
Outstanding at December 31, 2014	609	$	14.81	7.0	$	10,967
Options exercisable at December 31, 2014	321	$	9.99	5.2	$	7,323
Expected to vest at December 31, 2014	261	$	19.78	8.9	$	3,408

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, 2014:

In thousands except per share amounts
Outstanding Restricted Shares	Shares	Weighted-Average Grant-Date Fair Value
Outstanding at December 31, 2013	308	$	12.99
Granted	253	$	22.93
Vested	(96)	$	9.41
Forfeited/Cancelled	(6)	$	16.48
Outstanding at December 31, 2014	459	$	19.17
Expected to vest at December 31, 2014	431	$	19.50