Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Increase (Decrease) in Stockholders' Equity
Balance	$ 2,768,251	$ 2,458,327	$ 2,624,389	$ 2,324,032
Reclassification adjustment of unrealized gains (losses) on securities transferred from held-to-maturity	0	0	0	(27)
Other comprehensive income (loss), net of tax	263	(37)	322	(800)
Balance	2,852,851	2,547,298	2,852,851	2,547,298
Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity
Balance	(785)	(809)	(844)	(46)
Other comprehensive income (loss) before reclassification	263	(109)	321	(852)
Reclassification adjustment of unrealized gains (losses) on securities transferred from held-to-maturity	0	0	0	(27)
Reclassification adjustment for net loss on sale of available-for-sale securities, included in net income	0	72	1	79
Other comprehensive income (loss), net of tax	263	(37)	322	(800)
Balance	(522)	(846)	(522)	(846)
Unrealized Loss On Available-for-Sale Securities
Increase (Decrease) in Stockholders' Equity
Balance	(785)	(809)	(844)	(46)
Other comprehensive income (loss) before reclassification	263	(109)	321	(852)
Reclassification adjustment of unrealized gains (losses) on securities transferred from held-to-maturity	0	0	0	(27)
Reclassification adjustment for net loss on sale of available-for-sale securities, included in net income	0	72	1	79
Other comprehensive income (loss), net of tax	263	(37)	322	(800)
Balance	(522)	(846)	(522)	(846)
Other
Increase (Decrease) in Stockholders' Equity
Balance	0	0	0	0
Other comprehensive income (loss) before reclassification	0	0	0	0
Reclassification adjustment of unrealized gains (losses) on securities transferred from held-to-maturity	0	0	0	0
Reclassification adjustment for net loss on sale of available-for-sale securities, included in net income	0	0	0	0
Other comprehensive income (loss), net of tax	0	0	0	0
Balance	$ 0	$ 0	$ 0	$ 0