Debt (Tables)

6 Months Ended

Jun. 30, 2018

Debt Disclosure [Abstract]

Company's Borrowings

The following table shows the Company’s term debt:

	June 30, 2018		December 31, 2017
4.00% Convertible Senior Notes, $127,500 face amount, due in June 2036	$	98,716	$	116,255
2.75% Convertible Senior Notes, $67,527 face amount, due in June 2019	65,113		69,859
REG Danville term loan, secured, variable interest rate of LIBOR plus 4%, due in July 2022	10,212		11,460
REG Newton term loan, secured, variable interest rate of LIBOR plus 4%, due in December 2018	6,613		8,189
REG Ralston term loan, variable interest rate of Prime Rate plus 0.5%, due in July 2025	17,116		6,183
REG Mason City term loan, fixed interest rate of 5%, due in July 2019	—		1,153
REG Grays Harbor term loan, variable interest of minimum of 3.5% or Prime Rate plus 0.25%, due in May 2022	7,162		7,882
REG Capital term loan, fixed interest rate of 3.99%, due in January 2028	7,307		7,400
Other	105		179
Total term debt before debt issuance costs	212,344		228,560
Less: Current portion of long-term debt	176,746		13,397
Less: Debt issuance costs (net of accumulated amortization of $3,633 and $3,510, respectively)	4,592		6,627
Total long-term debt	$	31,006	$	208,536

Revolving Line of Credit

The following table shows the Company's lines of credit:

	June 30, 2018		December 31, 2017
Amount outstanding under lines of credit	$	7,844	$	65,525
Maximum available to be borrowed under lines of credit	$	113,895	$	60,839