Debt - Summary of covenant levels of financial covenants (Details)	Dec. 31, 2015
Fiscal Quarter Ending December 31, 2015 | Maximum
Financial Covenants
Consolidated Senior Secured Leverage Ratio (less than)	3.25
Fiscal Quarter Ending December 31, 2015 | Minimum
Financial Covenants
Consolidated Interest Coverage Ratio (greater than)	2.75
Fiscal Quarter Ending March 31, 2016 and thereafter | Maximum
Financial Covenants
Consolidated Senior Secured Leverage Ratio (less than)	3.00
Fiscal Quarter Ending March 31, 2016 and thereafter | Minimum
Financial Covenants
Consolidated Interest Coverage Ratio (greater than)	3