Operating Leases Operating Leases (Tables)

12 Months Ended

Dec. 31, 2017

Leases [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

Future minimum lease payments related to the operating leases described above, as of December 31, 2017, are as follows:

	Amounts (in thousands)
	Related Party		Non-Related Party		Total
2018	$	1,451	$	11,590	13,041
2019	—		9,227		9,227
2020	—		6,268		6,268
2021	—		5,699		5,699
Thereafter	—		10,167		10,167
Total	$	1,451	$	42,951	$	44,402