Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value disclosure	$ 237,500	$ 362,625
Estimate of Fair Value Measurement [Member] | Phantom Share Units (PSUs) [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Value	100
Estimate of Fair Value Measurement [Member] | Senior Notes [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value disclosure	71,250	186,750
Estimate of Fair Value Measurement [Member] | Term Loan [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value disclosure	166,250	175,875
Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value disclosure	467,699	464,552
Reported Value Measurement [Member] | Senior Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value disclosure	297,848	296,988
Reported Value Measurement [Member] | Term Loan [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value disclosure	$ 169,851	$ 167,564