XML 119 R103.htm IDEA: XBRL DOCUMENT v3.6.0.2
Accrued and Other Liabilities - Environmental Reserves (Details)
 3 Months Ended 12 Months Ended
Jun. 30, 2016
USD ($)
Jun. 30, 2016
USD ($)
Dec. 31, 2016
USD ($)
a
Dec. 31, 2015
USD ($)
a
Dec. 31, 2014
USD ($)
a
Site Contingency [Line Items]          
Restoration cost accrual     $ 1,505,757 $ 2,405,635  
Estimated restoration costs       1,700,000  
Land [Member]          
Site Contingency [Line Items]          
Area of a real estate property | a     9,800   99.7
Environmental Reserve for Monitoring Environmental Remediation Work Previously Performed [Member]          
Site Contingency [Line Items]          
Environmental reserve accrued     $ 249,000 187,500 $ 110,000
Additional environmental reserve accrued       500,000  
Environmental remediation cost     361,000    
Payments of restoration costs     187,500    
Environmental Reserve, Wetlands Mitigation and Restoration Costs [Member]          
Site Contingency [Line Items]          
Environmental reserve accrued     1,100,000 $ 1,700,000  
Area of a real estate property | a       148.4  
Estimated restoration costs $ 2,000,000 $ 2,000,000 1,100,000    
Increase in accrual of restoration Costs   300,000 325,000    
Funded on estimated costs   $ 935,000 935,000    
Payments of restoration costs     $ 935,000    
Minimum [Member] | Environmental Reserve for Monitoring Environmental Remediation Work Previously Performed [Member]          
Site Contingency [Line Items]          
Additional environmental reserve accrued       $ 500,000  
Minimum [Member] | Environmental Reserve, Wetlands Mitigation and Restoration Costs [Member]          
Site Contingency [Line Items]          
Estimated restoration costs       1,700,000  
Maximum [Member] | Environmental Reserve for Monitoring Environmental Remediation Work Previously Performed [Member]          
Site Contingency [Line Items]          
Additional environmental reserve accrued       1,000,000  
Maximum [Member] | Environmental Reserve for Monitoring Environmental Remediation Work Previously Performed [Member] | Land [Member]          
Site Contingency [Line Items]          
Area of a real estate property | a         1
Maximum [Member] | Environmental Reserve, Wetlands Mitigation and Restoration Costs [Member]          
Site Contingency [Line Items]          
Estimated restoration costs       $ 1,900,000