Discontinued Operations (Income Statement Disclosures) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss from discontinued operations, net of tax	$ (20,608)	$ (2,753)	$ (2,516)	$ (2,723)	$ 2,371	$ (1,889)	$ (2,766)	$ (3,077)	$ (28,600)	$ (5,361)	$ (2,225)
KC | Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue									100,860	113,469	128,520
Cost of sales									62,927	61,972	69,708
Gross profit									37,933	51,497	58,812
Selling, general and administrative expenses									54,047	58,035	61,033
Lease termination expense									15,186	0	435
Operating loss									(31,300)	(6,538)	(2,656)
Interest expense									583	361	258
Other expense, net									26	33	57
Loss from discontinued operations before income taxes									(31,909)	(6,932)	(2,971)
Income tax benefit									(3,309)	(1,571)	(746)
Loss from discontinued operations, net of tax									(28,600)	$ (5,361)	$ (2,225)
Severance termination benefits									1,800
Unpaid severance termination benefits	$ 400								$ 400