Acquisitions, Goodwill And Other Intangible Assets (Summary of Estimated Amortization Expense) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets
Amortization expense	$ 17,758	$ 16,055	$ 12,704
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity
2017	16,798
2018	15,378
2019	13,692
2020	11,343
2021	10,209
Cost of Sales
Finite-Lived Intangible Assets
Amortization expense	5,967	6,017	5,092
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity
2017	5,809
2018	4,973
2019	4,330
2020	3,283
2021	2,743
Selling, General and Administrative Expenses
Finite-Lived Intangible Assets
Amortization expense	11,791	$ 10,038	$ 7,612
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity
2017	10,989
2018	10,405
2019	9,362
2020	8,060
2021	$ 7,466