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Operating Leases (Tables)
12 Months Ended
Dec. 31, 2018
Leases [Abstract]  
Schedule of Future Minimum Operating Lease Payments
Minimum annual rentals for all operating leases having initial non-cancelable lease terms in excess of one year are as follows (amounts in thousands):
Years Ending December 31,
Amount
2019
$
4,553

2020
3,408

2021
2,454

2022
1,001

2023
28

Thereafter
16

Total future minimum rental payments
$
11,460