CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 153,242	$ 127,848
Accounts receivable, net of allowance for doubtful accounts of $98 and $84, at March 31, 2013 and December 31, 2012, respectively	11,420	6,805
Inventories	32,224	28,949
Prepaid expenses and other current assets, including $376 and $605 from affiliates at March 31, 2013 and December 31, 2012, respectively	2,672	2,446
Total current assets	199,558	166,048
Property, plant, and equipment, net of accumulated depreciation	415,379	411,600
Intangible assets, net	29	30
Goodwill	40,969	40,969
Deferred financing costs	1,962	2,200
Other long-term assets, including $1,272 and $1,315 with affiliates at March 31, 2013 and December 31, 2012, respectively	2,216	2,107
Total assets	660,113	622,954
Current liabilities:
Accounts payable, including $3,151 and $3,220 due to affiliates at March 31, 2013 and December 31, 2012, respectively	22,107	34,099
Personnel accruals, including $601 and $1,865 with affiliates at March 31, 2013 and December 31, 2012, respectively	2,443	4,931
Deferred revenue	28,604	965
Accrued expenses and other current liabilities, including $551 and $553 with affiliates at March 31, 2013 and December 31, 2012, respectively	10,868	9,480
Total current liabilities	64,022	49,475
Long-term liabilities:
Long-term debt, net of current portion	125,000	125,000
Other long-term liabilities, including $239 and $355 with affiliates at March 31, 2013 and December 31, 2012, respectively	1,975	2,286
Total long-term liabilities	126,975	127,286
Commitments and contingencies
Partners' capital:
Common unitholders, 73,065,143 units issued and outstanding at March 31, 2013 and December 31, 2012	471,654	448,943
General partner's interest	1	1
Accumulated other comprehensive loss	(2,539)	(2,751)
Total partners' capital	469,116	446,193
Total liabilities and partners' capital	$ 660,113	$ 622,954