Other Comprehensive Income (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Increase (Decrease) in Stockholders' Equity
Balance	$ 2,324,032,000	$ 1,986,111,000
Other comprehensive loss before reclassifications	(629,000)
Reclassification adjustment of unrealized losses on securities transferred from held-to-maturity	(27,000)	0
Reclassification adjustment for net gain on sale of available-for-sale securities, included in net income	(41,000)
Other comprehensive income (loss)	(697,000)	0
Balance	2,387,734,000	2,060,993,000
Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity
Balance	(46,000)	(46,000)
Balance	(743,000)	$ (46,000)
Unrealized Loss On Available-For-Sales Securities
Increase (Decrease) in Stockholders' Equity
Balance	(46,000)
Other comprehensive loss before reclassifications	(629,000)
Reclassification adjustment of unrealized losses on securities transferred from held-to-maturity	(27,000)
Reclassification adjustment for net gain on sale of available-for-sale securities, included in net income	(41,000)
Other comprehensive income (loss)	(697,000)
Balance	(743,000)
Other
Increase (Decrease) in Stockholders' Equity
Balance	0
Other comprehensive loss before reclassifications	0
Reclassification adjustment of unrealized losses on securities transferred from held-to-maturity	0
Reclassification adjustment for net gain on sale of available-for-sale securities, included in net income	0
Other comprehensive income (loss)	0
Balance	$ 0