Stock-Based Compensation Plans (Tables)

9 Months Ended

Sep. 30, 2018

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan

The following table summarizes the stock-based compensation expense recognized, by award type, and the compensation expense (benefit) recognized for phantom stock unit awards during thethree and nine months ended September 30, 2018 and 2017 (amounts in thousands):

	Three months ended September 30,					Nine months ended September 30,
	2018			2017		2018		2017
Stock option awards	$	101		$	249	$	342	$	726
Restricted stock awards	116			116		344		345
Restricted stock unit awards	823			525		2,710		2,154
	$	1,040		$	890	$	3,396	$	3,225
Phantom stock unit awards	$	(3,722	)	$	878	$	2,807	$	397

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Award Activity [Table Text Block]

The following table summarizes the number and weighted-average grant-date fair value of the restricted stock and restricted stock unit awards granted during the nine months ended September 30, 2018 and 2017:

	Nine months ended September 30,
	2018		2017
Restricted Stock:
Restricted stock awards granted	78,632		167,272
Weighted-average grant-date fair value	$	5.85	$	2.75
Time-based RSUs:
Time-based RSUs granted	788,377		96,728
Weighted-average grant-date fair value	$	3.85	$	5.61
Performance-based RSUs:
Performance-based RSUs granted	—		563,469
Weighted-average grant-date fair value	$	—	$	7.75