Consolidated Balance Sheets (Parenthetical)	Jun. 30, 2013	Dec. 31, 2012
Common units, authorized	4,500,000	4,500,000
Common units, issued	4,500,000	4,500,000
Management units, authorized	3,194,444	3,194,444
Management units, issued	3,194,444	3,194,444
Class A preferred units
Preferred units, authorized	14,250,000	14,250,000
Preferred units, issued	14,250,000	14,250,000
Class B preferred units
Preferred units, authorized	1,500,000	1,500,000
Preferred units, issued	1,500,000	1,500,000
Class C preferred units
Preferred units, authorized	8,500,000	8,500,000
Preferred units, issued	8,500,000	8,500,000