Schedule II - Valuation and Qualifying Accounts and Reserves (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Allowance for Doubtful Accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance - Beginning of the year	$ 5,139	$ 5,242	$ 3,881
Provisions	6,861	7,327	5,488
Utilizations	(7,357)	(7,392)	(4,264)
Currency translation adjustment	(9)	(38)	137
Balance - End of the year	4,634	5,139	5,242
Valuation Allowance of Deferred Tax Assets
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance - Beginning of the year	14,665	15,021
Balance - End of the year	$ 11,992	$ 14,665	$ 15,021