Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 83,854	$ 48,105	$ 158,670	$ 100,627
Net cumulative translation adjustment and foreign currency exchange hedge, net of tax of $121, $721, $2,562, and $269, respectively	(351)	(1,100)	(4,210)	18
Net unrealized gain on securities available-for-sale, net of tax of $259, $144, $104, and $287, respectively	820	459	329	918
Comprehensive income	$ 84,323	$ 47,464	$ 154,789	$ 101,563