Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2012

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases

The total future minimum rental commitments, exclusive of maintenance and operating costs, required under operating leases that have initial or remaining noncancelable lease terms in excess of one year at December 31, 2012, are as follows:

	Third Parties		Related Partnership		Total
For the year ending December 31:
2013	$	1,110	$	2,111	$	3,221
2014	1,062		2,020		3,082
2015	1,005		1,438		2,443
2016	919		165		1,084
2017	633		83		716
Thereafter	4,170		—		4,170
Total	$	8,899	$	5,817	$	14,716