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Lease Commitments - Additional Information (Details)
$ in Millions
3 Months Ended
Mar. 31, 2019
USD ($)
Leases [Abstract]  
Operating cash flows from operating leases $ 8.9
Right-of-use assets obtained in exchange for new operating lease liabilities $ 0.0
Weighted average remaining lease term - operating leases 7 years 10 months 24 days
Weighted average discount rate - operating leases 4.10%