SEGMENT DATA - Information on Operating Segments and Reconciliation to Loss From Operations (Details) - USD ($)		3 Months Ended			6 Months Ended
	Jun. 30, 2016	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues		$ 209,313,000		$ 199,443,000	$ 416,886,000	$ 396,026,000
Contribution income		20,429,000		19,734,000	36,431,000	37,966,000
Unallocated corporate overhead		10,827,000		9,791,000	21,113,000	20,159,000
Depreciation and amortization		2,285,000		2,465,000	4,476,000	4,877,000
Acquisition-related contingent consideration		281,000		183,000	551,000	470,000
Acquisition and integration costs		587,000		0	587,000	0
Impairment charges		0	$ 0	24,311,000	0	24,311,000
Income (loss) from operations		6,449,000		(17,016,000)	9,704,000	(11,851,000)
Nurse and allied staffing [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues		180,927,000		172,048,000	364,035,000	340,813,000
Contribution income		18,141,000		17,615,000	33,763,000	34,405,000
Physician staffing [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues		24,720,000		23,927,000	46,184,000	48,380,000
Contribution income		2,047,000		2,050,000	2,867,000	3,603,000
Impairment charges	$ 24,300,000
Other human capital management services [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues		3,666,000		3,468,000	6,667,000	6,833,000
Contribution income		$ 241,000		$ 69,000	$ (199,000)	$ (42,000)