Partners' Capital - Summary of Dividend Distributions (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Partners Capital And Distributions [Line Items]
General Partner/Limited Partner Units, Total Distribution	$ 38,862	[1]		[1]
Preferred Units, Total Distribution	14,400		20,751		19,565
Series F Preferred Units [Member]
Partners Capital And Distributions [Line Items]
Preferred Units, Total Distribution	2,896	[1]	2,728	[1]	3,256
Series G Preferred Units [Member]
Partners Capital And Distributions [Line Items]
Preferred Units, Total Distribution	1,809	[1]	1,809	[1]	1,809
Series J Preferred Units [Member]
Partners Capital And Distributions [Line Items]
Preferred Units, Total Distribution	2,034	[1]	10,785	[1]	10,875
Series K Preferred Units [Member]
Partners Capital And Distributions [Line Items]
Preferred Units, Total Distribution	$ 1,994	[1]	$ 3,625	[1]	$ 3,625

[1] The second quarter 2013 and fourth quarter 2012 distribution related to the redeemed Series J Preferred Units was pro-rated as discussed in the "Preferred Contributions" section. The third quarter 2013 distribution related to the redeemed Series K Preferred Units was pro-rated as discussed in the "Preferred Contributions" section.