Consolidated Statements of Cash Flows (Parenthetical)	Dec. 31, 2015	Dec. 31, 2014	Dec. 12, 2014	Sep. 26, 2014	Dec. 31, 2013	Oct. 08, 2010
5.25% Senior Notes [Member]
Debt instrument, interest rate	5.25%	5.25%	5.25%	5.25%
6.625% senior notes [Member]
Debt instrument, interest rate	6.625%	6.625%				6.625%
5.00% Senior Notes [Member]
Debt instrument, interest rate	5.00%				5.00%
11.625% senior subordinated notes [Member]
Debt instrument, interest rate	0.00%	11.625%			11.625%