Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net income	$ 141,583	$ 139,062	$ 172,129
Other comprehensive income net of tax and net of reclassification adjustments:
Change in fair value of available-for-sale securities	0	0	286
Change in currency translation	337	0	0
Comprehensive income	$ 141,920	$ 139,062	$ 172,415