Discontinued Operations Results for Discontinued Operations to the Net Income (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Costs, expenses and other expense, net:
(Loss) income from discontinued operations, net of taxes	$ (1,036)	$ 757	$ 49,837	$ 2,369
Net (loss) income from discontinued operations per common share
Basic and diluted (in USD per share)	$ (0.06)	$ 0.04	$ 2.86	$ 0.14
Weighted average number of common shares outstanding:
Basic and diluted (in shares)	17,521	17,188	17,429	17,025
Discontinued Operations, Disposed of by Sale
Sales:
Service sales	$ 0		$ 5,769
Costs, expenses and other expense, net:
Costs of service sales	0		1,807
Sales, marketing and support	0		1,606
General and administrative	0		1,619
Other expense, net	0		(23)
Income from discontinued operations before tax expense	0		714
(Loss) gain on sale of discontinued operations before tax expense	(819)		53,701
Total (loss) income from discontinued operations before tax expense	(819)		54,415
Income tax expense on discontinued operations	217		4,578
(Loss) income from discontinued operations, net of taxes	$ (1,036)		$ 49,837
Net (loss) income from discontinued operations per common share
Basic and diluted (in USD per share)	$ (0.06)		$ 2.86
Discontinued Operations, Held for Sale
Sales:
Service sales		$ 4,205		$ 13,661
Costs, expenses and other expense, net:
Costs of service sales		1,243		3,956
Sales, marketing and support		1,075		3,324
General and administrative		950		3,399
Other expense, net		(27)		(83)
Income from discontinued operations before tax expense		910		2,899
(Loss) gain on sale of discontinued operations before tax expense		0		0
Total (loss) income from discontinued operations before tax expense		910		2,899
Income tax expense on discontinued operations		153		530
(Loss) income from discontinued operations, net of taxes		$ 757		$ 2,369
Net (loss) income from discontinued operations per common share
Basic and diluted (in USD per share)		$ 0.04		$ 0.14