Accumulated Other Comprehensive Income (Loss) ("AOCIL"), Reclassification Out of Each Components (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Reclassifications out of AOCIL [Abstract]
Total reclassifications before tax	$ 24,361	$ 15,570	$ 48,411	$ 40,535
Interest expense	(3,068)	(6,939)	(11,748)	(20,149)
Income tax expense	4,777	3,125	9,245	7,979
Reclassifications, net of tax	19,584	12,445	39,166	32,556
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassifications out of AOCIL [Abstract]
Reclassifications, net of tax	(245)	80	(310)	418
Accumulated Other Comprehensive Loss [Member]
Reclassifications out of AOCIL [Abstract]
Reclassifications, net of tax	0	0	0	0
Unrealized Gains on Securities Available For Sale [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassifications out of AOCIL [Abstract]
Net gains on securities available for sale	0	0	253	137
Net impairment loss recognized in earnings	0	0	0	0
Total reclassifications before tax	0	0	253	137
Income tax expense	0	0	53	29
Reclassifications, net of tax	0	0	200	108
Unrealized Losses on Cash Flow Hedges [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassifications out of AOCIL [Abstract]
Interest expense	310	(102)	646	(393)
Income tax expense	65	(22)	136	(83)
Reclassifications, net of tax	$ 245	$ (80)	$ 510	$ (310)