XML 16 R28.htm IDEA: XBRL DOCUMENT v3.3.0.814
Commitments and Contingencies - Additional Information (Detail)
$ in Millions
 1 Months Ended
Jul. 31, 2015
USD ($)
Container
Mar. 31, 2015
USD ($)
Vehicle
Sep. 30, 2015
Vehicle
Container
Loss Contingencies [Line Items]      
Purchase contract units, tractors   300  
Total costs of purchasing tractors | $   $ 43.4  
Number of tractors received     156
Purchase contract units, containers | Container 1,000    
Cost of purchasing containers | $ $ 10.5    
Number of containers received | Container     175
Secured Fixed Rate Debt [Member]      
Loss Contingencies [Line Items]      
Number of tractors received     142