EQUITY - Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Pre- tax
Net change									$ 33,618	$ 35,106	$ (12,115)
Tax effect
Net change									9,508	9,812	(3,388)
Net of Tax
Other comprehensive income/(loss) before reclassifications									24,159	25,654	(8,507)
Total reclassifications for the period, net of tax									49	360	220
Other comprehensive income/(loss), net									24,110	25,294	(8,727)
Net income attributable to the Company, before tax									54,041	102,619	117,921
Income tax expense/(benefit)	$ 6,124	$ 1,821	$ 841	$ 102	$ 6,788	$ 5,517	$ 5,369	$ 4,917	8,888	22,591	37,537
Net income/(loss) attributable to the Company	$ 24,971	$ 22,680	$ (3,298)	$ 800	$ 21,244	$ 19,962	$ 19,380	$ 19,442	45,153	80,028	80,384
Total comprehensive income, pre-tax									87,659	137,725	105,806
Total comprehensive income, tax effect									18,396	32,403	34,149
Total comprehensive income attributable to the Company, net									69,263	105,322	71,657
Unrealized gain/(loss) on Investment securities available-for-sale
Pre- tax
Net gains/(losses) arising during period									33,796	36,092	(13,205)
Adjustments for realized (gains)/losses, net									0	0	596
Net change									33,796	36,092	(12,609)
Tax effect
Tax, Net gains/ (losses) arising during period									9,559	10,101	(3,702)
Tax, Adjustment for realized gains/ (losses), net									0	0	170
Net change									9,559	10,101	(3,532)
Net of Tax
Other comprehensive income/(loss) before reclassifications									24,237	25,991	(9,503)
Total reclassifications for the period, net of tax									0	0	(426)
Other comprehensive income/(loss), net									24,237	25,991	(9,077)
Unrealized gain/ (loss) on cash flow hedges, after 2017-12 adoption
Pre- tax
Net gains/(losses) arising during period									(158)	(46)	985
Adjustments for realized (gains)/losses, net									(70)	(508)	(907)
Net change									(228)	(554)	78
Tax effect
Tax, Net gains/ (losses) arising during period									(45)	(15)	285
Tax, Adjustment for realized gains/ (losses), net									(21)	(148)	(261)
Net change									(66)	(163)	24
Net of Tax
Other comprehensive income/(loss) before reclassifications									(113)	(31)	700
Total reclassifications for the period, net of tax									49	360	646
Other comprehensive income/(loss), net									(162)	(391)	54
Unrealized gain/(loss) on other
Pre- tax
Net gains/(losses) arising during period									50	(432)	416
Net change									50	(432)	416
Tax effect
Tax, Net gains/ (losses) arising during period									15	(126)	120
Net change									15	(126)	120
Net of Tax
Other comprehensive income/(loss) before reclassifications									35	(306)	296
Total reclassifications for the period, net of tax									0	0	0
Other comprehensive income/(loss), net									$ 35	$ (306)	$ 296