Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Revenue from services	$ 215,606	$ 193,968	$ 216,779	$ 210,064	$ 215,096	$ 209,200	$ 202,757	$ 195,171	$ 836,417	$ 822,224	$ 816,484
Gross profit	54,392	48,003	50,734	49,603	53,161	51,006	51,588	48,254
Consolidated net (loss) income	4,822	(1,148)	(14,048)	(1,768)	(600)	(2,697)	(51,270)	(1,376)	(12,142)	(55,943)	(15,717)
Net (loss) income attributable to common shareholders	$ 4,612	$ (1,334)	$ (14,151)	$ (2,089)	$ (1,144)	$ (3,128)	$ (51,674)	$ (1,767)	$ (12,962)	$ (57,713)	$ (16,951)
Net (loss) income per share attributable to common shareholders - Basic and diluted (usd per share)	$ 0.13	$ (0.04)	$ (0.39)	$ (0.06)	$ (0.03)	$ (0.09)	$ (1.44)	$ (0.05)	$ (0.36)	$ (1.61)	$ (0.48)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment charges									$ 16,248	$ 16,306	$ 22,423
Restructuring costs	$ 900	$ 2,300	$ 2,300	$ 600	$ 700	$ 1,600		$ 1,200	6,052	3,571	2,758
Legal Fees	600	800	1,600
Legal settlement charges							$ 1,600		0	1,600	0
Loss on extinguishment of debt					(1,500)				0	1,978	79
Applicant tracking system expenses	$ 700	400	400	500	300	300	300	$ 1,100
Valuation allowances							35,800		117	36,224	0
Loss on derivative									0	1,284	0
Leased Property
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment charges		900	4,500			1,800
Interest rate swap agreement | Cash Flow Hedging
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on derivative						1,300
Search
Quarterly Financial Information Disclosure [Abstract]
Revenue from services									10,534	14,804	15,566
Search | Goodwill and Intangible Assets
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment charges		200	10,500
Physician Staffing
Quarterly Financial Information Disclosure [Abstract]
Revenue from services									67,934	74,605	82,305
Nurse and Allied Staffing
Quarterly Financial Information Disclosure [Abstract]
Revenue from services									$ 757,949	$ 732,815	$ 718,613
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Amortization of assets		$ 900	$ 1,400	$ 700
Nurse and Allied Staffing | Trade names
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment charges							14,500
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