Share-Based Compensation Plans (Tables)

3 Months Ended

Mar. 31, 2017

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

Schedule of share-based compensation costs

The following table summarizes our share-based compensation expense attributable to stock options and restricted shares:

	For the Three Months Ended March 31,
	2017		2016
	(In thousands)
Share-based compensation expense	$	1,053	$	805

Summary of all common stock option activity

The following table summarizes our stock option activity for the three months ended March 31, 2017:

	Number of Shares (In thousands)		Weighted- Average Exercise Price Per Share		Weighted- Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value (In thousands)
Outstanding at December 31, 2016	2,443		$	6.93
Granted	2,735		9.86
Exercised	(27	)	5.49
Forfeited or expired	—		—
Outstanding at March 31, 2017	5,151		$	8.49	7.96	$	15,973
Fully vested at March 31, 2017 and expected to vest thereafter	4,962		$	8.45	7.89	$	15,580
Exercisable at March 31, 2017	1,671		$	7.30	4.61	$	7,190

Assumptions used in valuing the weighted average fair values of the options granted

	For the Three Months Ended March 31,
	2017			2016
Expected life (in years)	5.6			6.0
Risk-free interest rate	1.9		%	1.5		%
Volatility	43		%	44		%
Dividend yield	—			—
Weighted-average grant date fair value per option granted	$	4.16		$	2.02

Restricted share activity

The following table summarizes our restricted share activity for the three months ended March 31, 2017:

	Number of Shares (In thousands)		Weighted- Average Grant Date Fair Value (Per share)
Non-vested at December 31, 2016	145		$	5.02
Awards granted	200		9.86
Awards vested	(47	)	4.50
Awards forfeited	—		—
Non-vested at March 31, 2017	298		$	8.35