Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ 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
Quarterly Financial Information Disclosure [Abstract]
Revenue from services	$ 215,096	$ 209,200	$ 202,757	$ 195,171	$ 200,907	$ 200,717	$ 204,572	$ 210,288	$ 822,224	$ 816,484	$ 865,048
Gross profit	53,161	51,006	51,588	48,254	50,559	51,562	53,689	53,753
Consolidated net loss	(600)	(2,697)	(51,270)	(1,376)	(19,343)	(118)	1,824	1,920	(55,943)	(15,717)	38,802
Net loss attributable to common shareholders	$ (1,144)	$ (3,128)	$ (51,674)	$ (1,767)	$ (19,691)	$ (441)	$ 1,539	$ 1,642	$ (57,713)	$ (16,951)	$ 37,513
Net income (loss) per share attributable to common shareholders - Basic (usd per share)	$ (0.03)	$ (0.09)	$ (1.44)	$ (0.05)	$ (0.55)	$ (0.01)	$ 0.04	$ 0.05	$ (1.61)	$ (0.48)	$ 1.07
Net income (loss) per share attributable to common shareholders - Diluted (usd per share)	$ (0.03)	$ (0.09)	$ (1.44)	$ (0.05)	$ (0.55)	$ (0.01)	$ 0.04	$ 0.05	$ (1.61)	$ (0.48)	$ 1.01
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment charges		$ 1,800							$ 16,306	$ 22,423	$ 14,356
Legal settlement charges			$ 1,600						1,600	0	0
Loss on extinguishment of debt	$ (1,500)								1,978	79	4,969
Applicant tracking system expenses	300	300	300	$ 1,100	$ 500	$ 200
Valuation allowances			35,800						36,224	0	(45,354)
Loss (gain) on derivatives		1,300							1,284	0	(1,581)
Physician Staffing
Quarterly Financial Information Disclosure [Abstract]
Revenue from services									74,605	82,305	93,610
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment charges					22,400
Nurse and Allied Staffing
Quarterly Financial Information Disclosure [Abstract]
Revenue from services									$ 732,815	$ 718,613	$ 756,476
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment charges			14,500
Trade names
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Amortization of assets					$ 100
Trade names | Physician Staffing
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Amortization of assets		$ 300	500
Trade names | Nurse and Allied Staffing
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Amortization of assets	$ 2,000		$ 100