Segments and Related Information (Reconciliation of Consolidated Income (Loss) from Continuing Operations before Income Taxes to EBITDA) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
EBITDA Reconciliation:
Income (loss) from continuing operations before income taxes	$ 225,819	$ (67,746)	$ 198,430
Interest expense, net	50,734	48,055	50,769
Depreciation and amortization	164,915	169,662	154,452
EBITDA - Continuing operations	$ 441,500	$ 150,000	$ 403,700