Recently Issued Accounting Standards - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Jan. 01, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for doubtful accounts	$ 13,145		$ 11,716	$ 5,187	$ 5,457
Deferred tax liabilities	176,197		196,349
Retained earnings	$ 423,940		$ 412,979
ASU 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for doubtful accounts		$ 1,100
Deferred tax liabilities		200
Retained earnings		$ 900