Quarterly report pursuant to Section 13 or 15(d)

Equity Method Investments Schedule of Summarized Financial Information (Details)

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Equity Method Investments Schedule of Summarized Financial Information (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2017
Dec. 31, 2016
Equity Method Investments and Joint Ventures [Abstract]      
Current assets $ 28,542 $ 28,542 $ 30,837
Non-current assets 19,972 19,972 21,822
Current liabilities 14,851 14,851 20,455
Non-current liabilities 1,141 1,141 1,307
Revenue 32,986,000 67,419  
Net income 4,527,000 10,975  
Schedule of Equity Method Investments [Line Items]      
Carrying value of investment $ 153,775,000 $ 153,775,000 $ 156,527,000