Fair Value of Financial Instruments (Details) - USD ($)	Mar. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, fair value	$ 3,500,000	$ 6,500,000
Derivative liability, fair value	14,000,000	13,400,000
Long-term debt, fair value	326,100,000	318,500,000
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, fair value	3,500,000	6,500,000
Derivative liability, fair value	$ 14,000,000	$ 13,400,000
Senior Unsecured Term Loan Due January 15, 2020, 1.056% [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument, interest rate, percent	1.056%	1.056%
5 7/8% Senior Notes due 2021 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument, interest rate, percent	5.875%	5.875%
Debt instrument, face amount	$ 306,300,000.0	$ 306,600,000.0