Unit Information (Details) - $ / shares	Jun. 30, 2016	Dec. 31, 2015
Unit Information [Abstract]
Units Outstanding (in shares)	28,955,189	28,866,793
Unit Value, lower range (in dollars per share)	$ 3.11874	$ 3.07375
Unit Value, higher range (in dollars per share)	$ 4.06660	$ 3.99015