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Operating Leases Operating Leases (Tables)
 12 Months Ended
Dec. 31, 2016
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, 2016, are as follows:
 
Amounts (in thousands)
 
Related Party
Non-Related Party
Total
2017
$
1,838

$
207

$
2,045

2018
1,545

—

1,545

2019
—

—

—

2020
—

—

—

Thereafter
—

—

—

Total
$
3,383

$
207

$
3,590