CONSOLIDATED STATEMENT OF CHANGES IN PARTNERS CAPITAL (USD $) In Thousands, unless otherwise specified	Total	General Partner Preferred Units	General Partner Units	Limited Partner Units	Accumulated Other Comprehensive Loss
Balance at Dec. 31, 2013	$ 1,180,722	$ 73,587	$ 1,027,664	$ 82,833	$ (3,362)
Increase (Decrease) in Partners' Capital [Roll Forward]
Redemption of Preferred Units	(73,587)	(73,587)
Stock Based Compensation Activity	130		130
Conversion of Limited Partner Units to General Partner Units	0		1,279	(1,279)
Common Unit Distributions	(11,824)		(11,366)	(458)
Preferred Unit Distributions	(2,481)	(2,481)
Net Income	5,078	2,481	2,493	104
Other Comprehensive Income	(1,026)				(1,026)
Balance at Mar. 31, 2014	$ 1,097,012	$ 0	$ 1,020,200	$ 81,200	$ (4,388)