Goodwill and Other Intangible Assets (Intangible Assets) (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Amortization of Intangible Assets
Amortization of intangible assets	$ 6,836	$ 6,262
Estimated amortization of intangible assets, remainder of 2017	22,000
Estimated amortization of intangible assets, 2018	26,000
Estimated amortization of intangible assets, 2019	23,000
Estimated amortization of intangible assets, 2020	21,000
Estimated amortization of intangible assets, 2021	15,000
Estimated amortization of intangible assets, after 2021	$ 47,000