Commitments (Tables)

12 Months Ended

Dec. 31, 2016

Other Commitments [Abstract]

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

The following table presents our annual minimum rental payments under non-cancelable operating leases that have lease terms of one year or more as of December 31, 2016 (in thousands):

2017	$	7,289
2018	4,568
2019	2,376
2020	702
2021	349
2022 and thereafter	369
	$	15,653