Condensed Consolidating Financial Information (Details Textual)	Dec. 31, 2019	Dec. 31, 2018	Sep. 25, 2014
Condensed Financial Statements, Captions [Line Items]
Percentage of subsidiary owned	100.00%
Senior Notes
Condensed Financial Statements, Captions [Line Items]
Stated interest rate	5.125%
Senior Notes | 6.00% Senior Notes
Condensed Financial Statements, Captions [Line Items]
Stated interest rate	6.00%
Senior Notes | 5.875% Senior Notes
Condensed Financial Statements, Captions [Line Items]
Stated interest rate	5.875%	5.875%
Senior Notes | 5.875% Senior notes due 2024
Condensed Financial Statements, Captions [Line Items]
Stated interest rate	5.875%	5.875%	5.875%
Senior Notes | 6.625% Senior Notes
Condensed Financial Statements, Captions [Line Items]
Stated interest rate	6.625%	6.625%