XML 18 R37.htm IDEA: XBRL DOCUMENT v2.4.0.8
Equity Income in Unconsolidated Investment (Details) (USD $)
3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2013
Standard Steam Trust LLC [Member]
Jun. 30, 2013
Standard Steam Trust LLC [Member]
Dec. 31, 2013
Standard Steam Trust LLC [Member]
Jun. 30, 2014
Standard Steam Trust LLC [Member]
Noncontrolling Interest [Line Items]                
Ownership percentage (in hundredths)               19.54%
Impairment of equity investment             $ 2,200,000  
Equity gain (loss) from Standard Steam 0 (26,000) 0 (51,000) (26,000) (51,000,000)    
Carrying amount of investment             $ 0