Debt - Current Covenant Levels of the Financial Covenants Under the Senior Credit Facility (Details)	Feb. 02, 2018	Dec. 31, 2017
March 31, 2017
Financial Covenants
Consolidated Total Leverage Ratio (less than)		5.5
Actual Consolidated Total Leverage Ratio		5.20
Actual Consolidated Interest Coverage Ratio		2.71
March 31, 2017 | Minimum
Financial Covenants
Consolidated Interest Coverage Ratio (greater than)		2.50
June 30, 2017
Financial Covenants
Consolidated Total Leverage Ratio (less than)		5.25
Actual Consolidated Total Leverage Ratio		5.06
Actual Consolidated Interest Coverage Ratio		2.87
June 30, 2017 | Minimum
Financial Covenants
Consolidated Interest Coverage Ratio (greater than)		2.50
September 30, 2017
Financial Covenants
Consolidated Total Leverage Ratio (less than)		5.00
Actual Consolidated Total Leverage Ratio		4.82
Actual Consolidated Interest Coverage Ratio		3.06
September 30, 2017 | Minimum
Financial Covenants
Consolidated Interest Coverage Ratio (greater than)		2.75
December 31, 2017
Financial Covenants
Consolidated Total Leverage Ratio (less than)		4.75
Actual Consolidated Total Leverage Ratio		4.53
Actual Consolidated Interest Coverage Ratio		3.25
December 31, 2017 | Minimum
Financial Covenants
Consolidated Interest Coverage Ratio (greater than)		3.00
Subsequent Event
Financial Covenants
Consolidated Total Leverage Ratio (less than)	5.25