Shared-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2018

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

Components of Share-Based Compensation Expense by Type of Award

The following table lists the components of share-based compensation expense by type of award.

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Stock options	$	152	$	194	$	358	$	575
Restricted stock	397		395		856		855
Performance share units	529		477		1,120		788
Share-based compensation	$	1,078	$	1,066	$	2,334	$	2,218

Weighted Average Assumptions Relevant to Determining the Fair Value at the Dates of Grant and Stock Option Modification

The following table shows the weighted average assumptions relevant to determining the fair value of stock options granted in 2018.

	2018 Stock Option Awards
Expected term	6 years
Risk free interest rate	2.65	%
Dividend yield	1.14	%
Expected volatility	47.78	%
Expected forfeiture rate	4.00	%

Reconciliation of Option Activity

The following table summarizes option activity for the six months ended June 30, 2018.

Options	Shares (in thousands)		Weighted- Average Exercise Price (per share)		Weighted- Average Remaining Contractual Term (years)	Aggregate Intrinsic Value
Outstanding at January 1, 2018	746		$	14.33
Granted	55		24.55
Exercised	(27	)	10.15			$	274
Outstanding at June 30, 2018	774		$	15.21	6.1	$	2,861	(1)
Exercisable at June 30, 2018	625		$	13.61	5.4	$	3,304	(1)

Reconciliation of Restricted Stock Option Activity

The following table summarizes the status of unvested restricted stock awards as of June 30, 2018, and changes during the six months then ended.

	Nonvested Restricted Shares (in thousands)		Weighted Average Grant-Date Fair Value (per share)
Nonvested at January 1, 2018	152		$	19.21
Granted	87		$	24.55
Vested	(92	)	$	19.76
Nonvested at June 30, 2018	147		$	22.02

Schedule of Performance Based Awards Goals with Respect to TSR and ROIC

The following table presents the goals with respect to TSR and ROIC for each award granted in 2018.

TSR:		Threshold Performance (50% of Shares)		Target Performance (100% of Shares)		Maximum Performance (150% of Shares)
	2018 grants	35th Percentile		50th Percentile		75th Percentile
ROIC:		Threshold Performance (35% of Shares)		Target Performance (100% of Shares)		Maximum Performance (150% of Shares)
	2018 grants	15.5	%	18	%	19.5	%

Schedule of Number of Awards Granted and Grant Date Fair Value of Each Award in Periods

The following table presents the number of awards granted and the grant date fair value of each award in the periods presented.

	TSR Awards			ROIC Awards
Award Year	Shares (in thousands)	Grant Date Fair Value (per share)		Shares (in thousands)	Grant Date Fair Value (per share)
2018	55	$	24.65	55	$	24.55

Summary of Status of Unvested PSU Awards

The following table summarizes the status of unvested PSU awards as of June 30, 2018, and changes during the six months then ended.

	Nonvested TSR Awards				Nonvested ROIC Awards
	Shares (in thousands)		Weighted Average Grant-Date Fair Value (per share)		Shares (in thousands)		Weighted  Average Grant-Date Fair Value (per share)
Nonvested at January 1, 2018	130		$	16.60	136		$	16.27
Granted	55		$	24.65	55		$	24.55
Forfeited	(11	)	$	15.12	(12	)	$	15.49
Nonvested at June 30, 2018	174		$	18.90	179		$	18.63