Goodwill and Other Intangible Assets (Other Intangible Assets) (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Jun. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Amortized Intangible Assets [Line Items]
Goodwill and other long-lived asset impairment charge	$ 8,109	$ 312	$ 9,200	$ 8,109	$ 9,536
Amortization of Intangible Assets
Amortization of intangible assets	12,269	$ 10,923		34,052	$ 28,290
Estimated amortization of intangible assets, remainder of 2018	12,000			12,000
Estimated amortization of intangible assets, 2019	48,000			48,000
Estimated amortization of intangible assets, 2020	45,000			45,000
Estimated amortization of intangible assets, 2021	39,000			39,000
Estimated amortization of intangible assets, 2022	33,000			33,000
Estimated amortization of intangible assets, after 2022	83,000			$ 83,000
Other Businesses [Member] | Forney [Member]
Amortized Intangible Assets [Line Items]
Goodwill and other long-lived asset impairment charge			$ 9,200
Healthcare [Member]
Amortized Intangible Assets [Line Items]
Intangible asset impairment charge	$ 7,900