Consolidated Statements Of Cash Flows (Parenthetical)	Dec. 31, 2016	Dec. 31, 2014	Sep. 28, 2012	Jul. 13, 2012	Jul. 24, 2009
8.25% Senior Notes [Member]
Debt instrument, interest rate, stated percentage	8.25%	8.25%			8.25%
5.625% Senior Notes [Member]
Debt instrument, interest rate, stated percentage	5.625%		5.625%
5.75% Senior Notes [Member]
Debt instrument, interest rate, stated percentage	5.75%			5.75%