Financial Instruments and Concentrations of Risk (Tables)

12 Months Ended

Dec. 31, 2014

Fair Value Disclosures [Abstract]

Fair Value of Financial Assets and Liabilities

The tables below summarize the balances of commodity derivative assets and liabilities at December 31, 2014 and 2013 (in thousands):

	December 31, 2014							December 31, 2013
Derivatives subject to netting arrangements:	Level 1		Netting*			Total		Level 1		Netting*			Total
Commodity derivatives:
Assets	$	3,311	$	(1,637	)	$	1,674	$	36	$	(36	)	$	—
Liabilities	$	1,637	$	(1,637	)	$	—	$	96	$	(36	)	$	60

* Relates primarily to exchange traded futures. Gain and loss positions on multiple contracts are settled net on a daily basis with the exchange.

Schedule of Notional Quantities for Commodity Derivative Instruments

The following table sets forth the notional quantities for derivative instruments entered into (in thousands of barrels):

	Year Ended December 31, 2014	Year Ended December 31, 2013	Year Ended December 31, 2012
Sales	6,773	2,595	1,743
Purchases	6,477	2,575	1,636

Schedule of Derivatives Not Designated as Hedging Instruments Fair Value on Condensed Consolidated Balance Sheets

We have recorded the fair value of our commodity derivative instruments on our consolidated balance sheets in "other current assets" and "other current liabilities" in the following amounts (in thousands):

December 31, 2014				December 31, 2013
Other Current Assets		Other Current Liabilities		Other Current Assets		Other Current Liabilities
$	1,674	$	—	$	—	$	60

Schedule of Realized and Unrealized Gains (Losses) from Commodity Derivatives

Realized and unrealized gains (losses) from our commodity derivatives were recorded to product revenue in the following amounts (in thousands):

Year Ended December 31, 2014		Year Ended December 31, 2013			Year Ended December 31, 2012
$	19,305	$	(1,593	)	$	149

Schedule of Foreign Assets and Liabilities

The following table summarizes the assets and liabilities (excluding affiliate balances) at December 31, 2014 of our subsidiaries outside the United States (in thousands):

	Canada		United Kingdom		Mexico		Total
Cash and cash equivalents	$	17,710	$	957	$	13,253	$	31,920
Other current assets	58,271		1,854		49,145		109,270
Noncurrent assets	215,386		147,687		44,827		407,900
Total assets	$	291,367	$	150,498	$	107,225	$	549,090
Current liabilities	$	37,713	$	1,442	$	32,527	$	71,682
Noncurrent liabilities	75,977		18,619		1,232		95,828
Total liabilities	113,690		20,061		33,759		167,510
Net assets	$	177,677	$	130,437	$	73,466	$	381,580