Accrued Liabilities and Deferred Credits (Tables)

9 Months Ended

Sep. 30, 2013

Payables and Accruals [Abstract]

Accrued Liabilities and Deferred Credits

Accrued liabilities and deferred credits consist of the following:

	September 30, 2013		December 31, 2012
Accrued compensation	$	3,558	$	3,529
Deferred revenue	29,768		27,962
Environmental and insurance liabilities	1,515		1,621
Accrued property taxes	4,294		—
Other accrued liabilities	14,016		9,240
Total accrued liabilities and deferred credits	$	53,151	$	42,352