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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2017
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Future Minimum Rental Payments for Operating Leases
A summary of future minimum rental payments required under operating leases that have initial or remaining terms in excess of one year as of December 31, 2017 are as follows (in thousands):  
Years ended
 
Operating Leases
2018
 
910.0

2019
 
901.2

2020
 
827.0

2021
 
474.4

2022 and thereafter
 
128.6

Total minimum lease payments
 
$
3,241.2