Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2019

See the table below for reconciliation of "Cash, Cash Equivalents and Restricted Cash" in regards to the Condensed Consolidated Statements of Cash Flows:



	June 30, 2019		June 30, 2018
Cash and cash equivalents	$	61,597	$	221,775
Restricted cash	3,000		—
Total cash, cash equivalents and restricted cash in the Condensed Statements of Cash Flows	$	64,597	$	221,775

Activity Under Repurchase Agreements

The table below sets out the information regarding the activities under the 2017 Program and 2018 Program during the three and six months ended June 30, 2018:



	Three months ended June 30, 2018								Six months ended June 30, 2018
	Number of shares/ Principal amount in 000's		December 2017 Program		June 2018 Program		Both Programs		Number of shares/Principal amount in 000's		December 2017 Program		June 2018 Program		Both Programs
Repurchases of shares of common stock	1,296,243		$	17,220	$	—	$	17,220	1,937,844		$	25,048	$	—	$	25,048
2019 Senior Convertible Notes Repurchases	$	—	$	—	$	—	$	—	$	6,311	$	6,689	$	—	$	6,689
2036 Senior Convertible Notes Repurchases	$	24,500	$	41,763	$	—	$	41,763	$	24,500	$	41,763	$	—	$	41,763

Disaggregation of Revenue

The following table depicts the disaggregation of revenue according to product line and segment:



	Reportable Segments
Three months ended June 30, 2019	Biomass-based Diesel		Services		Corporate and other		Intersegment Revenues			Consolidated Total
Biomass-based diesel sales, net of BTC related amount due to customers of $0	$	430,971	$	—	$	—	$	(1,158	)	$	429,813
Petroleum diesel sales	—		—		78,184		—			78,184
Other biomass-based diesel revenue	32,022		—		—		—			32,022
Separated RIN sales	19,596		—		—		—			19,596
Other revenues	—		24,139		—		(23,641		)	498
Total revenues from contracts with customers	$	482,589	$	24,139	$	78,184	$	(24,799	)	$	560,113
Biomass-based diesel government incentives	530		—		—		—			530
Total revenues	$	483,119	$	24,139	$	78,184	$	(24,799	)	$	560,643

Three months ended June 30, 2018	Biomass-based Diesel		Services		Corporate and other		Intersegment Revenues			Consolidated Total
Biomass-based diesel sales, net of BTC related amount due to customers of $0	$	484,150	$	—	$	6,103	$	(16,737	)	$	473,516
Petroleum diesel sales	—		—		47,070		—			47,070
Other biomass-based diesel revenue	30,523		—		—		—			30,523
Separated RIN sales	26,186		—		—		—			26,186
Other revenues	—		17,523		—		(16,833		)	690
Total revenues from contracts with customers	$	540,859	$	17,523	$	53,173	$	(33,570	)	$	577,985
Biomass-based diesel government incentives	915		—		—		—			915
Total revenues	$	541,774	$	17,523	$	53,173	$	(33,570	)	$	578,900



	Reportable Segments
Six months ended June 30, 2019	Biomass-based Diesel		Services		Corporate and other		Intersegment Revenues			Consolidated Total
Biomass-based diesel sales, net of BTC related amount due to customers of $0	$	746,700	$	—	$	—	$	(2,775	)	$	743,925
Petroleum diesel sales	—		—		162,087		—			162,087
Other biomass-based diesel revenue	89,213		—		—		—			89,213
Separated RIN sales	42,059		—		—		—			42,059
Other revenues	—		43,722		—		(43,152		)	570
Total revenues from contracts with customers	$	877,972	$	43,722	$	162,087	$	(45,927	)	$	1,037,854
Biomass-based diesel government incentives	998		—		—		—			998
Total revenues	$	878,970	$	43,722	$	162,087	$	(45,927	)	$	1,038,852

Six months ended June 30, 2018	Biomass-based Diesel		Services		Corporate and other		Intersegment Revenues			Consolidated Total
Biomass-based diesel sales, net of BTC related amount due to customers of $144,944	$	648,369	$	—	$	9,682	$	(32,448	)	$	625,603
Petroleum diesel sales	—		—		118,034		—			118,034
Other biomass-based diesel revenue	82,233		—		—		—			82,233
Separated RIN sales	73,365		—		—		—			73,365
Other revenues	—		52,738		—		(51,271		)	1,467
Total revenues from contracts with customers	$	803,967	$	52,738	$	127,716	$	(83,719	)	$	900,702
Biomass-based diesel government incentives	366,200		—		—		—			366,200
Total revenues	$	1,170,167	$	52,738	$	127,716	$	(83,719	)	$	1,266,902

Contract Balances

The following table provides information about receivables and contract liabilities from contracts with customers:



	June 30, 2019			December 31, 2018
Accounts receivable	$	75,207		$	74,551
Short-term contract liabilities (deferred revenue)	$	(4,536	)	$	(300	)

Significant changes to the contract liabilities during the three and six months ended June 30, 2019 and 2018 are as follows:



	April 1, 2019		Cash receipts (Payments)			Less: Impact on Revenue		Other			June 30, 2019
Deferred revenue	$	13,315	$	11,690		$	20,469	$	—		$	4,536

	April 1, 2018		Cash receipts (Payments)			Less: Impact on Revenue		Other			June 30, 2018
Deferred revenue	$	1,740	$	3,296		$	4,872	$	(3	)	$	161
Payables to customers related to BTC	150,776		(109,841		)	—		—			40,935
	$	152,516	$	(106,545	)	$	4,872	$	(3	)	$	41,096



	January 1, 2019		Cash receipts (Payments)			Less: Impact on Revenue			Other			June 30, 2019
Deferred revenue	$	300	$	40,347		$	36,111		$	—		$	4,536

	January 1, 2018		Cash receipts (Payments)			Less: Impact on Revenue			Other			June 30, 2018
Deferred revenue	$	2,218	$	13,803		$	15,857		$	(3	)	$	161
Payables to customers related to BTC	—		(109,841		)	(144,944		)	5,832			40,935
	$	2,218	$	(96,038	)	$	(129,087	)	$	5,829		$	41,096