Partners' Capital - Summary of Dividend Distributions (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014
Partners Capital And Distributions [Line Items]
General Partner/Limited Partner Units, Total Distribution	$ 23,636
Total Preferred Dividend/Distribution	2,481
Series F Preferred Units
Partners Capital And Distributions [Line Items]
Total Preferred Dividend/Distribution	566
Series G Preferred Units
Partners Capital And Distributions [Line Items]
Total Preferred Dividend/Distribution	$ 453