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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Future Minimum Annual Commitments Under Operating Leases
Future minimum annual commitments under such operating leases at December 31, 2018 are as follows:
Twelve months ending December 31,
 
2019
$
16,926

2020
12,765

2021
9,597

2022
5,753

2023
3,721

Thereafter
32,852

Total future minimum annual commitments under operating lease obligations
$
81,614