Description of Business and Significant Accounting Policies - Schedule of Cumulative Effect of Initially Applying New Guidance (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
Assets
Short-term accounts and notes receivable, less allowance for doubtful accounts	$ 255,474		$ 340,930
Notes receivable – long–term portion, less allowance for doubtful accounts	34,417		46,992
Allowance for doubtful accounts on short-term accounts and notes receivables	(59,906)		(45,726)
Allowance for doubtful accounts on long-term notes receivables	(7,895)		(6,667)
Deferred income taxes, net	35,554		20,364
Stockholders’ equity
Retained earnings	$ 200,893		$ 195,455
Cumulative Impact from Adopting ASC 326 Guidance
Assets
Short-term accounts and notes receivable, less allowance for doubtful accounts		$ (41,100)
Notes receivable – long–term portion, less allowance for doubtful accounts		(1,136)
Allowance for doubtful accounts on short-term accounts and notes receivables		(41,100)
Allowance for doubtful accounts on long-term notes receivables		(1,136)
Deferred income taxes, net		10,137
Stockholders’ equity
Retained earnings		(32,099)
Cumulative Effect, Period of Adoption, Adjusted Balance
Assets
Short-term accounts and notes receivable, less allowance for doubtful accounts		299,830
Notes receivable – long–term portion, less allowance for doubtful accounts		45,856
Allowance for doubtful accounts on short-term accounts and notes receivables		(86,826)
Allowance for doubtful accounts on long-term notes receivables		(7,803)
Deferred income taxes, net		30,501
Stockholders’ equity
Retained earnings		$ 163,356