Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Consolidated Statements of Comprehensive Income
Net income	$ 58,151	$ 33,761	$ 182,506	$ 153,480
Other comprehensive income, net of tax:
Unrealized gains on available-for-sale securities, net of taxes of $44 for the three months ended September 30, 2018, and $6 for the nine months ended September 30, 2018		(133)		(20)
Unrealized gains (losses) on hedging derivatives, net of taxes of $19 and $89 for the three and nine months ended September 30, 2019	(58)		(329)
Unrealized gains (losses) on hedging derivatives, net of taxes of $2 and $81 for the three and nine months ended September 30, 2018		(4)		248
Comprehensive income	$ 58,093	$ 33,624	$ 182,177	$ 153,708