Acquisitions - Narrative (Detail)			2 Months Ended	3 Months Ended									12 Months Ended			30 Months Ended
	Oct. 30, 2015 USD ($) shares	Jun. 30, 2014 USD ($) location $ / shares	Dec. 31, 2015 USD ($)	Dec. 31, 2016 USD ($) state client specialty	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2016 USD ($) state client specialty	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2016 USD ($) state client specialty	Apr. 01, 2016 USD ($)
Business Acquisition, Contingent Consideration [Line Items]
Cash purchase price paid at closing													$ 2,155,000	$ 149,000	$ 0
Goodwill			$ 95,096,000	$ 79,648,000				$ 95,096,000					79,648,000	95,096,000		$ 79,648,000
Acquisition costs													78,000	902,000	7,957,000
Acquisition of assets of Medical Staffing Network, net of cash acquired													1,900,000	28,721,000	44,631,000
Acquisition-related contingent consideration													(769,000)	0	0
Noncontrolling interest fair value assessment, discounted cash flow method, utilization percentage		80.00%
Noncontrolling interest fair value assessment, guideline public company method, utilization percentage		10.00%
Noncontrolling interest fair value assessment, mergers and acquisition method, utilization percentage		10.00%
Net (loss) income				$ (7,649,000)	$ 14,289,000	$ (17,095,000)	$ 19,186,000	$ (5,927,000)	$ 5,151,000	$ 2,680,000	$ 3,050,000		$ 8,731,000	4,954,000	(31,534,000)
Mediscan
Business Acquisition, Contingent Consideration [Line Items]
Cash purchase price paid at closing	$ 29,900,000
Cash consideration plus working capital estimate	28,000,000
Fair value of shares	$ 4,723,000
Fair value of shares (in shares) | shares	349,871
Contingent consideration, range of outcomes, high	$ 7,000,000
Number of states | state				11									11			11
Number of clients (more than) | client				300									300			300
Number of specialties (more than) | specialty				70									70			70
Revenues			6,700,000
Net income			$ 300,000
Finite-lived intangible assets	$ 17,200,000
Weighted average useful life	10 years
Goodwill	$ 14,338,000
Acquisition costs														700,000
Consideration transferred	36,912,000
Other intangible assets	17,200,000
Medical Staffing Network
Business Acquisition, Contingent Consideration [Line Items]
Contingent liability		$ 2,500,000															$ 2,100,000
Finite-lived intangible assets		$ 11,200,000
Weighted average useful life		11 years
Goodwill		$ 13,381,000
Acquisition costs															2,200,000
Consideration transferred		47,100,000
Cash acquired from acquisition		1,000,000
Acquisition of assets of Medical Staffing Network, net of cash acquired		44,600,000
Business combination, amount deposited in escrow, working capital adjustment		$ 1,000,000
Business combination, amount received from escrow, working capital adjustment												$ 200,000
Period of deferred consideration		21 months
Acquisition-related contingent consideration																$ 400,000
Number of locations of operations | location		55
Gross accounts receivable		$ 38,100,000
Receivables not expected to be collected		800,000
Claim attached		2,300,000
Policy limit		5,000,000.0
Estimated fair value of professional liabilities related to stop loss policy		5,600,000
Estimated recovery receivable related to stop loss policy		400,000
Policy, coverage per occurrence		1,000,000
Policy coverage		5,000,000
Excess layer limit per occurrence		1,000,000.0
Excess layer limit		6,000,000.0
Other intangible assets		17,100,000
Noncontrolling interest		324,000
Acquisition and integration costs															7,300,000
Acquisition-related Costs | Mediscan
Business Acquisition, Contingent Consideration [Line Items]
Net (loss) income														$ 800,000
Acquisition-related Costs | Medical Staffing Network
Business Acquisition, Contingent Consideration [Line Items]
Net (loss) income															$ 6,200,000
Subordinated Debt | Medical Staffing Network
Business Acquisition, Contingent Consideration [Line Items]
Long-term Debt		55,000,000
Term Loan Facility | Medical Staffing Network
Business Acquisition, Contingent Consideration [Line Items]
Long-term Debt		$ 30,000,000
Term		5 years
Convertible Notes Payable | Medical Staffing Network
Business Acquisition, Contingent Consideration [Line Items]
Long-term Debt		$ 25,000,000
Term		6 years
Debt conversion price (usd per share) | $ / shares		$ 7.10
Trade Names | Medical Staffing Network
Business Acquisition, Contingent Consideration [Line Items]
Other intangible assets		$ 5,900,000
Trade Names | Mediscan
Business Acquisition, Contingent Consideration [Line Items]
Finite-lived intangible assets	$ 3,200,000
Intangible assets- useful life	11 years
Customer Relationships | Mediscan
Business Acquisition, Contingent Consideration [Line Items]
Finite-lived intangible assets	$ 5,200,000
Intangible assets- useful life	10 years
Customer Relationships | Medical Staffing Network
Business Acquisition, Contingent Consideration [Line Items]
Intangible assets- useful life		13 years
Other intangible assets		$ 4,700,000
Database Rights | Mediscan
Business Acquisition, Contingent Consideration [Line Items]
Finite-lived intangible assets	$ 8,800,000
Intangible assets- useful life	10 years
Database Rights | Medical Staffing Network
Business Acquisition, Contingent Consideration [Line Items]
Intangible assets- useful life		10 years
Other intangible assets		$ 6,500,000
Other Current Liabilities | Mediscan
Business Acquisition, Contingent Consideration [Line Items]
Contingent liability				$ 4,300,000									$ 4,300,000			4,300,000
Potential Earnout, Attainment of Specific Performance Criteria in 2016 | Mediscan
Business Acquisition, Contingent Consideration [Line Items]
Contingent consideration, range of outcomes, high	$ 3,500,000
Potential Earnout, Attainment of Specific Performance Criteria in 2017 | Mediscan
Business Acquisition, Contingent Consideration [Line Items]
Contingent consideration, range of outcomes, high	$ 3,500,000
Potential Earnout | Mediscan
Business Acquisition, Contingent Consideration [Line Items]
Maximum payment liability each year for contingent liabilities acquired				300,000									300,000			300,000
Remaining liability at undiscounted basis				3,600,000									3,600,000			3,600,000
Contingent liability				$ 700,000									$ 700,000			$ 700,000