Long-Term Debt and Financing Arrangements - Financial Ratios under Senior Credit Facility (Details)	3 Months Ended
	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017
Required
Financial Ratios Under Senior Credit Facility [Line Items]
Leverage Ratio (maximum)	3.5	3.5	3.5
Interest Coverage Ratio (minimum)	2.75	2.75	2.75
Actual
Financial Ratios Under Senior Credit Facility [Line Items]
Leverage Ratio (maximum)	2.15	1.97	1.62
Interest Coverage Ratio (minimum)	11.48	12.44	15.38