Quarterly Financial Data

12 Months Ended

Dec. 31, 2013

Quarterly Financial Data [Abstract]

Quarterly Financial Information [Text Block]

Quarterly Financial Data (Unaudited)

The table below summarizes our unaudited quarterly financial data for 2013 and 2012.

	2013 Quarters												Total
	First			Second			Third			Fourth			Year
Revenues from continuing operations	$	1,014,808		$	1,068,694		$	1,090,293		$	961,035		$	4,134,830
Operating income	$	30,005		$	33,360		$	24,092		$	23,300		$	110,757
Income from continuing operations	$	22,704		$	26,612		$	17,966		$	16,722		$	84,004
Income from discontinued operations	$	143		$	290		$	508		$	1,164		$	2,105
Net income	$	22,847		$	26,902		$	18,474		$	17,886		$	86,109
Basic and diluted net income per common unit:
Continuing operations	$	0.28		$	0.32		$	0.21		$	0.19		$	1.00
Discontinued operations	$	—		$	0.01		$	0.01		$	0.01		$	0.03
Net income per common unit	$	0.28		$	0.33		$	0.22		$	0.20		$	1.03
Cash distributions per common unit (1)	$	0.4850		$	0.4975		$	0.5100		$	0.5225		$	2.0150
	2012 Quarters												Total
	First			Second			Third			Fourth			Year
Revenues from continuing operations	$	755,577		$	797,705		$	895,023		$	919,056		$	3,367,361
Operating income	$	27,134		$	28,112		$	29,236		$	30,228		$	114,710
Income from continuing operations	$	20,007		$	19,028		$	31,310		$	26,992		$	97,337
Loss from discontinued operations	$	(403	)	$	(444	)	$	(116	)	$	(55	)	$	(1,018	)
Net income	$	19,604		$	18,584		$	31,194		$	26,937		$	96,319
Basic and diluted net income per common unit:
Continuing operations	$	0.27		$	0.24		$	0.39		$	0.34		$	1.24
Discontinued operations	$	—		$	(0.01	)	$	—		$	—		$	(0.01	)
Net income per common unit	$	0.27		$	0.23		$	0.39		$	0.34		$	1.23
Cash distributions per common unit (1)	$	0.4400		$	0.4500		$	0.4600		$	0.4725		$	1.8225

(1) Represents cash distributions declared and paid in the applicable period.