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Leases - Schedule of Lease Terms and Discount Rates (Details)
3 Months Ended
Mar. 31, 2019
Weighted-average remaining lease terms (years)  
Operating leases 10 years 10 months 24 days
Finance leases 4 years 10 months 24 days
Weighted-average discount rate  
Operating leases 9.00%
Finance leases 5.60%