CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net Income	$ 22,628	$ 25,605	$ 48,417	$ 71,563
Other comprehensive income:
Unrealized gains on securities available-for-sale	2,301	5,555	19,986	29,864
Reclassification of unrealized losses on securities transferred to available-for-sale upon adoption of new accounting pronouncement	0	0	0	(730)
Amortization of unrealized losses on securities transferred to held-to-maturity, net	55	59	173	202
Reclassification adjustment for (gains) losses included in net income	(4)	895	(1,097)	1,538
Provision for income taxes	(423)	(1,468)	(4,304)	(7,503)
Total other comprehensive income	1,929	5,041	14,758	23,371
Comprehensive Income	$ 24,557	$ 30,646	$ 63,175	$ 94,934