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Operating Leases Schedule of Future Minimum Rental Payments for Operating Leases (Tables)
 12 Months Ended
Dec. 31, 2020
Future Minimum Lease Payments [Abstract]  
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
The following table presents a maturity analysis of our annual undiscounted cash flows reconciled to the carrying value of our operating lease liabilities as of December 31, 2020:
(Dollars in thousands)
2021$8,998 
20228,212 
20236,536 
20244,782 
20253,287 
Thereafter35,377 
Total lease payments67,192 
Less: Imputed interest(14,718)
Total operating lease liability$52,474