XML 32 R16.htm IDEA: XBRL DOCUMENT

Liability Extinguishment	12 Months Ended
Liability Extinguishment	Dec. 31, 2015
Liability Extinguishment [Abstract]
Liability Extinguishment	(10) Liability Extinguishment During the 2013 second quarter we concluded that an approximate $4.3 million liability we recorded during 2006 upon the purchase of Sunrise Coal relating to a terminated coal contract was no longer required. The amount had no effect on cash flows.