Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net income	$ 37,563	$ 34,560	$ 108,206	$ 100,703
Other comprehensive income (loss), net of tax:
Unrealized net holding gains (losses) arising during period from securities available for sale, net of tax of $427 and $2,791 for the three and nine months ended September 30, 2019, respectively, and net of benefit of $(733) and $(2,589) for the three and nine months ended September 30, 2018, respectively	1,443	(2,757)	10,497	(9,740)
Reclassification adjustment for net gains on sale of securities available for sale, net of tax of $6 and $5 for the three and nine months ended September 30, 2019, respectively, and $39 and $40 for the three and nine months ended September 30, 2018, respectively	18	147	23	150
Other comprehensive income (loss), net of tax	1,461	(2,610)	10,520	(9,590)
Comprehensive income	$ 39,024	$ 31,950	$ 118,726	$ 91,113