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Restructuring (Details) - Facility closing
$ in Millions
3 Months Ended
Mar. 31, 2017
USD ($)
facility
Restructuring and Severance  
Number of facilities being exited | facility 3
Exit costs $ 5.4
Lease liability current 1.7
Lease liability noncurrent 3.7
Accelerated depreciation 1.4
Deferred rent and tenant improvements written off 1.9
Selling, administrative and other operating expenses  
Restructuring and Severance  
Net impact of facility exit activity $ 4.9