Shared-Based Compensation (Tables)

9 Months Ended

Sep. 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 September 30,					Nine Months Ended September 30,
	2018			2017		2018			2017
Stock options	$	173		$	527	$	531		$	1,102
Restricted stock	388			773		1,244			1,628
Performance share units	530			467		1,650			1,255
Change in estimate of performance share vesting (1)	(802		)	$	—	(802		)	—
Share-based compensation expense	$	289		$	1,767	$	2,623		$	3,985

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	2.66	%
Dividend yield	1.15	%
Expected volatility	47.69	%
Expected forfeiture rate	4.00	%

Reconciliation of Option Activity

The following table summarizes option activity for the nine months ended September 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	58		24.41
Exercised	(27	)	10.15			$	477
Forfeited or expired	(4	)	23.51
Outstanding at September 30, 2018	773		$	15.19	5.9	$	319	(1)
Exercisable at September 30, 2018	626		$	13.63	5.2	$	1,232	(1)

Reconciliation of Restricted Stock Option Activity

The following table summarizes the status of unvested restricted stock awards as of September 30, 2018, and changes during the nine 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	(93	)	$	19.69
Nonvested at September 30, 2018	146		$	22.07

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	%	18.0	%	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 September 30, 2018, and changes during the nine months then ended. All PSUs that vested on December 31, 2017, were settled in shares in May 2018.

	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	(13	)	$	14.50	(14	)	$	14.86
Nonvested at September 30, 2018	172		$	18.47	177		$	18.31