CONSOLIDATED BALANCE SHEETS (Parenthetical)
Dec. 31, 2013
Dec. 31, 2012
Statement of Financial Position [Abstract]    
Common limited partner capital, units issued 29,079,866 24,412,427
Common limited partner capital, units outstanding 29,079,866 24,412,427
Subordinated limited partner capital, units issued 24,409,850 24,409,850
Subordinated limited partner capital, units outstanding 24,409,850 24,409,850
General partner interests, units issued 1,091,453 996,320
General partner interests, units outstanding 1,091,453 996,320