Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Service revenue, net	$ 1,509,944	$ 1,384,965	$ 1,318,220
Operating expenses:
Service expense	1,401,152	1,253,608	1,197,211
General and administrative expense	67,244	77,093	69,907
Asset impairment charge	0	14,175	0
Depreciation and amortization	16,816	15,813	13,618
Total operating expenses	1,485,212	1,360,689	1,280,736
Operating income	24,732	24,276	37,484
Other expenses (income):
Interest expense, net	850	1,783	1,204
Other income	(277)	0	(5,363)
Equity in net loss (gain) of investee		6,158	(13,445)
Gain on remeasurement of cost method investment	0	(6,577)	0
(Loss) income from continuing operations before income taxes	(5,526)	22,912	55,088
(Benefit) provision for income taxes	(573)	4,684	4,003
(Loss) income from continuing operations, net of tax	(4,953)	18,228	51,085
Income (loss) from discontinued operations, net of tax	5,919	(37,053)	2,735
Net income (loss)	966	(18,825)	53,820
Net loss from discontinued operations attributable to noncontrolling interest	0	(156)	(451)
Net income (loss) attributable to Providence	966	(18,981)	53,369
Net (loss) income available to common stockholders (Note 16)	$ (3,437)	$ (25,257)	$ 42,636
Basic (loss) earnings per common share:
Continuing operations (in dollars per share)	$ (0.72)	$ 0.92	$ 2.99
Discontinued operations (in dollars per share)	0.46	(2.87)	0.15
Basic earnings per common share (in dollars per share)	$ (0.26)	$ (1.95)	$ 3.14
Weighted-average number of common shares outstanding:
Basic (in shares)	12,958,713	12,960,837	13,602,140
Diluted (in shares)	12,958,713	13,033,247	13,673,314
Diluted (loss) earnings per common share:
Continuing operations (in dollars per share)	$ (0.72)	$ 0.92	$ 2.97
Discontinued operations (in dollars per share)	0.46	(2.86)	0.15
Diluted earnings (loss) per common share (in dollars per share)	$ (0.26)	$ (1.94)	$ 3.12