Annual report pursuant to Section 13 and 15(d)

Recent Transactions (Management Changes) (Narrative) (Details)

v3.10.0.1
Recent Transactions (Management Changes) (Narrative) (Details)
$ in Millions
12 Months Ended
Dec. 31, 2018
USD ($)
Mar. 15, 2018
item
Mar. 14, 2018
item
Restructuring Cost and Reserve [Line Items]      
Restructuring charges $ 7.9    
Restructuring costs related to stock compensation 1.0    
Amortization of stock compensation 2.0    
Number of board members | item   10 9
General and Administrative Expense [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges 6.5    
Operating Services [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring charges $ 1.4