XML 30 R20.htm IDEA: XBRL DOCUMENT v3.21.2
Acquisition - Additional Information (Detail)
$ in Thousands
 3 Months Ended 9 Months Ended
Dec. 09, 2020
USD ($)
Carrier
Sep. 30, 2021
USD ($)
Jun. 30, 2021
USD ($)
Sep. 30, 2020
USD ($)
Sep. 30, 2021
USD ($)
Sep. 30, 2020
USD ($)
Business Acquisition [Line Items]            
Business acquisition, cash paid $ 89,800          
Post-Closing Activities     $ 100      
Revenue   $ 1,075,107   $ 924,812 $ 2,975,980 $ 2,542,914
Operating income   59,873   $ 33,917 120,872 $ 74,654
Nonstop Delivery, LLC [Member]            
Business Acquisition [Line Items]            
Business acquisition date Dec. 09, 2020          
Percentage of equity interests acquired 100.00%          
Consideration for transaction $ 105,900          
Settlement of accounts receivable due from subsidiary $ 16,100          
Number of network carriers | Carrier 170          
Goodwill and other intangible assets tax deductible, period 15 years          
Amortization expense of intangible assets   $ 1,000     $ 2,800  
Intangible assets, weighted average useful life         13 years 11 months 4 days