Debt (Tables)

3 Months Ended

Mar. 31, 2016

Debt Disclosure [Abstract]

Company's Borrowings

The Company’s debt is as follows:

	March 31, 2016		December 31, 2015
2.75% Convertible Senior Notes, $143,750 face amount, due in June 2019	$	127,255	$	126,053
REG Geismar GOZone bonds, secured, variable interest rate of daily LIBOR, due in October 2033	100,000		100,000
REG Danville term loan, secured, variable interest rate of LIBOR plus 4%, due in December 2017	6,192		—
REG Newton term loan, secured, variable interest rate of LIBOR plus 4%, due in December 2018	16,106		16,800
REG Mason City term loan, fixed interest rate of 5%, due in July 2019	3,445		3,675
REG Ames term loans, secured, fixed interest rates of 3.5% and 4.25%, due in January 2018 and December 2019, respectively	3,818		3,901
REG Grays Harbor term loan, variable interest of minimum of 3.5% or Prime Rate plus 0.25%, due in May 2022	5,225		5,225
Other	2,039		908
Total debt before debt issuance costs	264,080		256,562
Less: current portion of long-term debt	9,109		5,206
Less: Debt issuance costs (net of accumulated amortization of $2,515 and $2,296, respectively	3,817		4,105
Total long-term debt	$	251,154	$	247,251

Revolving Line of Credit

Lines of Credit

	March 31, 2016		December 31, 2015
Amount outstanding under lines of credit	$	2,864	$	23,149
Maximum available to be borrowed under lines of credit	$	60,205	$	23,067