Goodwill and Other Intangible Assets (Estimated Annual Amortization Expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization charge of intangible assets	$ 1,800	$ 1,900
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]
Remainder of 2017	5,344
2018	6,719
2019	5,854
2020	4,887
2021 and thereafter	12,129
Net Carrying Amount	$ 34,933		$ 28,512