Earnings (Loss) Per Share (Basic and Diluted Earnings (Loss) Per Common Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Class of Stock [Line Items]
(Loss) income from continuing operations	$ (7,767)	$ (3,421)	$ (1,122)	$ (743)	$ 3,917	$ (1,870)	$ (111)	$ (29)	$ (13,053)	$ 1,907	$ 7,158
Loss from discontinued operations, net of tax	(722)	319	(2,704)	(11,235)	(17,836)	(876)	(2,169)	(30,156)	(14,342)	(51,037)	(20,620)
Net loss	$ (8,489)	$ (3,102)	$ (3,826)	$ (11,978)	$ (13,919)	$ (2,746)	$ (2,280)	$ (30,185)	$ (27,395)	$ (49,130)	$ (13,462)
Weighted average common shares outstanding - Basic (in shares)									57,580	56,087	54,459
Assumed conversions:
Weighted average common shares outstanding - Diluted (in shares)									57,580	56,350	54,992
Basic earnings (loss) per common share:
Continuing operations (in dollars per share)	$ (0.14)	$ (0.06)	$ (0.02)	$ (0.01)	$ 0.07	$ (0.03)	$ 0.00	$ 0.00	$ (0.23)	$ 0.03	$ 0.13
Discontinued operations, net of tax (in dollars per share)	(0.01)	0.01	(0.05)	(0.19)	(0.31)	(0.02)	(0.04)	(0.55)	(0.25)	(0.91)	(0.38)
Basic earnings (loss) per common share (in dollars per share)	(0.15)	(0.05)	(0.07)	(0.20)	(0.24)	(0.05)	(0.04)	(0.55)	(0.48)	(0.88)	(0.25)
Diluted earnings (loss) per common share:
Continuing operations (in dollars per share)	(0.14)	(0.06)	(0.02)	(0.01)	0.07	(0.03)	0.00	0.00	(0.23)	0.03	0.13
Discontinued operations, net of tax (in dollars per share)	(0.01)	0.01	(0.05)	(0.19)	(0.31)	(0.02)	(0.04)	(0.55)	(0.25)	(0.91)	(0.37)
Diluted earnings (loss) per common share (in dollars per share)	$ (0.15)	$ (0.05)	$ (0.07)	$ (0.20)	$ (0.24)	$ (0.05)	$ (0.04)	$ (0.55)	$ (0.48)	$ (0.88)	$ (0.24)
Stock options
Class of Stock [Line Items]
Anti-dilutive securities excluded from calculation of earnings per share (in shares)									700
Assumed conversions:
Incremental common shares (in shares)									0	197	527
Restricted Stock Units (RSUs)
Class of Stock [Line Items]
Anti-dilutive securities excluded from calculation of earnings per share (in shares)									700
Assumed conversions:
Incremental common shares (in shares)									0	66	6