Summary of Significant Accounting Policies (Additional Cash Flow) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Noncash or Part Noncash Acquisitions [Line Items]
Earn-out and payments related to business acquisitions	$ 5,400	$ 1,500
Dividends payable	4,900	4,300	$ 4,300
Adjustments to other comprehensive income related to the underfunding of the pension and SERP plans and changes in fair value of derivative financial instruments	11,900	38,700	39,000
Adjustments to other comprehensive income related to underfunding of pension and SERP plans and changes in fair value of derivative financial instruments, net of tax	7,200	23,400	23,600
Accrual for purchases of property and equipment		1,500	900
Earnout payments to former owners	$ 1,453	$ 3,610	50
Aerospace [Member]
Noncash or Part Noncash Acquisitions [Line Items]
Earnout payments to former owners			$ 3,500