Description Of Business And Segment Reporting (Summary Of Capital Expenditures) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Total capital expenditures	$ 53,119	$ 14,914	$ 20,082
Segment [Member]
Segment Reporting Information [Line Items]
Total capital expenditures	52,989	14,310	19,910
Corporate [Member]
Segment Reporting Information [Line Items]
Total capital expenditures	$ 130	$ 604	$ 172