Quarterly report pursuant to Section 13 or 15(d)

Fair Value - Balance Sheet of Unconsolidated Affiliate (Details)

v3.7.0.1
Fair Value - Balance Sheet of Unconsolidated Affiliate (Details) - USD ($)
Mar. 31, 2017
Dec. 31, 2016
Assets    
Total Assets $ 649,346,368 $ 650,732,571
Liabilities    
Total Liabilities 217,085,799 216,823,091
Reported Value Measurement [Member] | Unconsolidated Affiliates [Member]    
Assets    
Current assets 16,182 20,412
Noncurrent assets 696,341 698,745
Total Assets 712,523 719,157
Liabilities    
Current liabilities 13,593 14,718
Noncurrent liabilities 268,891 268,805
Total Liabilities 282,484 283,523
Partner's equity 430,039 435,634
Total liabilities and partner's equity $ 712,523 $ 719,157