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Leases (Summary of Leases) (Details)
Jun. 30, 2019
Leases [Abstract]  
Weighted average remaining lease term, operating leases (in years) 8 years 1 month 28 days
Weighted average remaining lease term, finance leases (in years) 6 years 21 days
Weighted average discount rate, operating leases (as a percentage) 4.75%
Weighted average discount rate, financing leases (as a percentage) 10.28%