Segments and Related Information (Reconciliation of Consolidated Income (Loss) before Income Taxes to EBITDA) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
EBITDA Reconciliation:
Income (loss) before income taxes	$ 67,985	$ (4,968)
Interest expense, net	12,597	12,158
Depreciation and amortization	42,904	39,008
Consolidated EBITDA	$ 123,500	$ 46,200