Business Acquisition (Details) - USD ($) $ in Thousands		12 Months Ended
	Dec. 06, 2018	Dec. 31, 2018	Dec. 31, 2017	[1]	Dec. 31, 2016
Business Acquisition [Line Items]
Goodwill		$ 63,452	$ 62,030		$ 61,888
Paofit
Business Acquisition [Line Items]
Purchase price	$ 2,800
Acquisition costs		$ 200
Goodwill	$ 1,602

[1] See Note 4.