XML 58 R47.htm IDEA: XBRL DOCUMENT v3.19.2
Leases - Additional Information (Details)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2019
USD ($)
Jun. 30, 2019
USD ($)
Lessee, Lease, Description [Line Items]    
Option to extend leases 5 years 5 years
Option to terminate leases   1 year
Operating lease costs $ 3.6 $ 7.0
Short-term lease costs $ 0.1 $ 0.1
Minimum    
Lessee, Lease, Description [Line Items]    
Remaining lease terms 1 year 1 year
Maximum    
Lessee, Lease, Description [Line Items]    
Remaining lease terms 20 years 20 years