XML 80 R65.htm IDEA: XBRL DOCUMENT v3.8.0.1
Commitments and Contingencies - Summary of Asset Retirement Obligations (Details) - USD ($)
$ in Thousands
12 Months Ended
Nov. 30, 2017
Nov. 30, 2016
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]    
Balance at the beginning of the period $ 13,448 $ 9,992
ARO assumed in acquisition 772 2,989
Accretion expense 762 539
Revisions to ARO during the period (12) (72)
Balance at the end of the period $ 14,970 $ 13,448