Stock-based Compensation (Tables)

6 Months Ended

Jun. 30, 2017

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

Summary of Weighted Average Assumptions

The Black-Scholes option-pricing model was used with the following weighted average assumptions:

	Six Months Ended June 30,
	2017		2016
Risk-free rate	1.7	%	1.2	%
Expected life	4.8 years		4.6 years
Expected volatility	64.1	%	55.4	%
Expected dividend	none		none

Summary of Restricted Stock Option

The following table summarizes restricted shares, SARs, and stock options granted during the three and six months ended June 30, 2017 and 2016 (in thousands):

	Three Months Ended June 30,		Six Months Ended June 30,
	2017	2016	2017	2016
Restricted shares	855	27	855	27
SARs	85	569	85	584
Stock options	—	—	—	—

Summary of Stock-based Compensation Expenses

The following table summarizes stock-based compensation expense for the three and six months ended June 30, 2017 and 2016 ($ in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2017		2016		2017		2016
Restricted shares	$	680	$	130	$	1,060	$	295
SARs	249		323		682		604
Stock options	5		29		13		70
	$	934	$	482	$	1,755	$	969

Summary of Unrecognized Stock-based Compensation

The following table summarizes unrecognized stock-based compensation and the remaining weighted average period over which such stock-based compensation is expected to be recognized as of June 30, 2017 ($ in thousands):

	Unrecognized Expense		Weighted Average Remaining years
Restricted shares	$	15,104	2.4
SARs	1,731		2.1
Stock options	3		0.4
	$	16,838