Fair Value Measurements (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument, carrying value	$ 445,957,000	$ 399,579,000
6.25% Senior Notes due October 2021
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument, carrying value	389,150,000	400,000,000
6.25% Senior Notes due October 2021 | Fair Value, Inputs, Level 2
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument, carrying value	388,100,000	397,500,000
Debt instrument, fair value disclosure	123,600,000	354,000,000.0
2017 Credit Facility | Credit Facility
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Debt instrument, carrying value	$ 55,000,000	$ 0