Restructuring and Other Charges (Narrative) (Details)	3 Months Ended
	Mar. 31, 2017 USD ($)
Restructuring And Related Activities [Abstract]
Restructuring additional cost	$ 15,000,000
Restructuring pre-tax net charges	22,600,000
Net realizable value write-offs on contract accounts receivables	16,500,000
Statutory redundancy and severance costs	1,400,000
Other liabilities	$ 4,700,000