Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2012

Summary of Significant Accounting Policies [Abstract]

Consolidated Statements of Cash Flows-Supplemental Disclosures

	Nine Months Ended September 30,
	2012		2011
Supplemental cash flow information
Total interest costs incurred	$	43,983	$	41,791
Interest capitalized	$	461	$	—
Interest expense	$	43,522	$	41,791
Cash paid for interest, net of amounts capitalized	$	40,527	$	39,158
Cash paid for income taxes	$	1,210	$	55
Supplemental schedule of noncash investing and financing activities
Accounts payable and accrued liabilities for construction in progress	$	5,635	$	1,525
Assumption of debt upon acquisition	$	—	$	268,008
Assumption of notes to affiliates upon acquisition	$	—	$	14,824
Acquisition of working capital deficit, net of cash	$	—	$	(4,175	)
Distribution of investment in joint venture not acquired	$	—	$	11,480
Issuance of common shares and units for acquisition of properties	$	—	$	33,854
Notes receivable from affiliate settled in common units	$	—	$	21,797
Notes payable to affiliates settled in common units	$	—	$	828
Reduction to capital for prepaid Offering costs	$	—	$	1,974
Transfer taxes accrued at time of Offering	$	—	$	6,556