Recent Accounting Pronouncements - Narrative (Details) - USD ($)		3 Months Ended		6 Months Ended
	Jan. 01, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Retained earnings		$ 444,728,000		$ 444,728,000		$ 405,668,000
Income tax benefit		$ (8,872,000)	$ (6,487,000)	$ (11,858,000)	$ (8,058,000)
Accounting Standards Update [Extensible List]				us-gaap:AccountingStandardsUpdate201613Member
Cumulative Effect, Period of Adoption, Adjustment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Income tax benefit	$ 96,000
Retained Earnings | Cumulative Effect, Period of Adoption, Adjustment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Retained earnings	$ (291,000)