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Consolidated Statements of Comprehensive Income (Loss) - Unaudited - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 116,042	$ 50,515	$ 213,978	$ 76,332
Unrealized gains (losses) on available for sale debt securities:
Unrealized gains (losses) arising during the period	958	(1,090)	1,950	25,127
Income tax effect	(249)	283	(507)	(6,533)
Reclassification adjustments for (gains) losses included in net income	(6,063)	(11,707)	(31,441)	(20,035)
Income tax effect	1,576	3,044	8,174	5,209
Net unrealized gains (losses) on available for sale debt securities	(3,778)	(9,470)	(21,824)	3,768
Unrealized gains (losses) on cash flow hedges:
Unrealized gains (losses) arising during the period	0	580	12,321	(33,486)
Income tax effect	0	(151)	(3,204)	8,884
Reclassification adjustment for (gains) losses included in net income	0	4,400	26,972	8,596
Income tax effect	0	(1,145)	(7,013)	(2,263)
Net unrealized gains (losses) on cash flow hedges	0	3,684	29,076	(18,269)
Other comprehensive income (loss), net of income tax effect	(3,778)	(5,786)	7,252	(14,501)
Comprehensive income (loss)	$ 112,264	$ 44,729	$ 221,230	$ 61,831

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