Commitments And Contingencies Commitments and contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

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

As of December 31, 2017, future minimum lease payments under non-cancelable operating leases are as follows (in thousands):

2018	$	8,924
2019	7,718
2020	6,092
2021	5,715
2022	5,638
Thereafter	12,921
Total future minimum lease payments	$	47,008