Acquisition, Restructuring and Other Expense (Restructuring Accrual) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Restructuring accrual
Restructuring accrual, beginning balance	$ 7,175	$ 8,254
Expenses incurred	5,096	14,974
Payments made	(10,447)	(18,041)
Restructuring accrual, ending balance	$ 1,824	$ 5,187