UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenues [Abstract]
Service revenue and other	$ 59,691	$ 53,134
Operating expenses
Cost of services	23,283	20,317
Selling, general and administrative	20,153	22,096
Restructuring expense	618	0
Depreciation and amortization	13,266	12,085
Total operating expenses	57,320	54,498
Operating income (loss)	2,371	(1,364)
Other income:
Other income, net	1,600	749
Income (loss) before income taxes	3,971	(615)
Income tax expense (benefit)	922	(765)
Income from continuing operations	3,049	150
Income from discontinued operations, net of tax	48,472	13,130
Net income	51,521	13,280
Other comprehensive income:
Unrealized income (loss) on interest rate hedge, net of tax	773	(6,106)
Comprehensive income	$ 52,294	$ 7,174
Net income per share, basic and diluted:
Basic - Income from continuing operations (in dollars per share)	$ 0.06	$ 0
Basic - Income from discontinued operations, net of tax (in dollars per share)	0.97	0.27
Basic net income per share (in dollars per share)	1.03	0.27
Diluted - Income from continuing operations (in dollars per share)	0.06	0
Diluted - Income from discontinued operations, net of tax (in dollars per share)	0.97	0.27
Diluted net income per share (in dollars per share)	$ 1.03	$ 0.27
Weighted average shares outstanding, basic (in shares)	49,947	49,888
Weighted average shares outstanding, diluted (in shares)	50,081	50,036