Income Taxes Income Taxes Details 1 (Details) - USD ($) $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2016	[1]	Sep. 30, 2016	[1]	Jun. 30, 2016	[1]	Mar. 31, 2016	[1]	Dec. 31, 2015	[1]	Sep. 30, 2015	[1]	Jun. 30, 2015	[1]	Mar. 31, 2015	[1]	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Taxes [Abstract]
United States																	$ 287,946	$ 331,622	$ 360,800
Foreign																	38,712	38,729	41,800
Income from continuing operations before income taxes	$ 139,289		$ 74,963		$ 32,639		$ 79,767		$ 113,699		$ 74,045		$ 84,489		$ 98,118		$ 326,658	$ 370,351	$ 402,600

[1] Includes (Losses) gains on divestitures and impairment charges, net, as described in Note 19.