XML 33 R17.htm IDEA: XBRL DOCUMENT

Asset Impairments	6 Months Ended
Asset Impairments	Jun. 30, 2016
Wexpro Impairment [Abstract]
Asset Impairments	Asset Impairments During the fourth quarter of 2015, Wexpro recorded a pre-tax abandonment and impairment charge of $12.1 million for the South Moxa leasehold because current oil market prices do not support an oil drilling program.