Fair Value Measurements - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration, liability, noncurrent			$ 4,867	$ 7,409
Contingent consideration, liability, current			2,400	300
Right of use impairment charge	$ 1,200
Impairment charges	1,800		$ 16,306	$ 22,423	$ 14,356
Minimum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Threshold period, past due for payment of services provided			30 days
Maximum
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Threshold period, past due for payment of services provided			60 days
Nurse and Allied Staffing
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of intangibles indefinite lived		$ 14,500
Impairment charges		$ 14,500
Leasehold improvements
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Tangible asset impairment charges	$ 600