Financial Instruments and Concentrations of Risk (Tables)

12 Months Ended

Dec. 31, 2017

Fair Value of Financial Assets and Liabilities

The table below summarizes the balances of commodity derivative assets and liabilities at December 31, 2017 and 2016 (in thousands):



	December 31, 2017
	Level 1			Level 2		Level 3			Netting⁽¹⁾			Total
Assets:
Commodity derivatives ⁽²⁾	$	602		$	—	$	—		$	(602	)	$	—
Foreign currency forwards	—			2,564		—			—			2,564
Total assets	602			2,564		—			(602		)	2,564
Liabilities:
Commodity derivatives	1,970			—		—			(602		)	1,368
Interest rate swaps	—			—		1,228			—			1,228
Total liabilities	1,970			—		1,228			(602		)	2,596
Net assets (liabilities) at fair value	$	(1,368	)	$	2,564	$	(1,228	)	$	—		$	(32	)

	December 31, 2016
	Level 1			Level 2		Level 3			Netting⁽¹⁾			Total
Assets:
Commodity derivatives ⁽²⁾	$	68		$	—	$	—		$	(68	)	$	—
Foreign currency forwards	—			—		—			—			—
Total assets	68			—		—			(68		)	—
Liabilities:
Commodity derivatives	1,396			—		—			(68		)	1,328
Interest rate swaps	—			—		—			—			—
Total liabilities	1,396			—		—			(68		)	1,328
Net assets (liabilities) at fair value	$	(1,328	)	$	—	$	—		$	—		$	(1,328	)



(1)	Relates primarily to exchange traded futures. Gain and loss positions on multiple contracts are settled net on a daily basis with the exchange.
(2)	Commodity derivatives are subject to netting arrangements.

Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

The following table summarizes changes in the fair value of our net financial liabilities classified as Level 3 in the fair value hierarchy (in thousands):



	Year Ended December 31, 2017
Net liabilities - beginning balance	$	—
Interest rate swaps acquired through acquisition (Note 5)	3,275
Transfers out of Level 3	—
Realized/Unrealized (gain) loss included in earnings*	(1,124		)
Settlements	(923		)
Net liabilities - ending balance	$	1,228

*Gains and losses related to interest rate swaps are recorded in interest expense in the condensed consolidated statements of operations and comprehensive income (loss).

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,
	2017	2016	2015
Sales	12,979	33,694	23,228
Purchases	13,430	33,819	22,946

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, 2017				December 31, 2016
Other Current Assets		Other Current Liabilities		Other Current Assets		Other Current Liabilities
$	—	$	1,368	$	—	$	1,328

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,
	2017			2016			2015
Realized and unrealized gain (loss)	$	(2,193	)	$	(4,485	)	$	8,146

Schedule of Foreign Assets and Liabilities

The following table summarizes the assets and liabilities (excluding affiliate balances) at December 31, 2017 of our subsidiaries outside the United States (in thousands):



	Canada		United Kingdom		Mexico		Total
Cash and cash equivalents	$	33,601	$	13,185	$	9,581	$	56,367
Other current assets	62,790		3,150		35,044		100,984
Noncurrent assets	427,259		136,800		42,272		606,331
Total assets	$	523,650	$	153,135	$	86,897	$	763,682

Current liabilities	$	64,056	$	4,410	$	19,574	$	88,040
Noncurrent liabilities	71,309		13,016		716		85,041
Total liabilities	135,365		17,426		20,290		173,081
Net assets	$	388,285	$	135,709	$	66,607	$	590,601