Quarterly report pursuant to Section 13 or 15(d)

Selected Balance Sheet Data - Schedule of Other Assets (Detail)

v3.8.0.1
Selected Balance Sheet Data - Schedule of Other Assets (Detail) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Other Assets [Line Items]    
Other assets Current $ 4,624 $ 5,529
Other assets Non-Current 26,191 23,163
Due from independent contractors, net [Member]    
Other Assets [Line Items]    
Other assets Current 2,713 3,672
Other assets Non-Current 24,798 21,726
Security deposits [Member]    
Other Assets [Line Items]    
Other assets Current 0 0
Other assets Non-Current 1,161 1,158
Employee Notes Receivable [Member]    
Other Assets [Line Items]    
Other assets Current 351 366
Other assets Non-Current 177 255
Customer trust accounts and other [Member]    
Other Assets [Line Items]    
Other assets Current 1,560 1,491
Other assets Non-Current $ 55 $ 24