Recently Issued Accounting Standards - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Retained earnings	$ 382,521	$ 412,979
Deferred income taxes	189,439	$ 211,094
Accounting Standards
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Retained earnings	900
Allowance For Doubtful Accounts Receivable	1,100
Deferred income taxes	$ 200