BORROWINGS (Advances from FHLB and Respective Maturity Schedule) (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Maturity:
One Year	$ 625,969	$ 575,000
Two Years	42,500	80,000
Three Years	80,816	100,833
Four Years	26,826	10,000
Five Years	72,500	0
After five years	0	0
Total advances from FHLB	$ 848,611	$ 765,833
Maturity:
One Year	2.46%	1.43%
Two Years	2.12%	3.50%
Three years	3.08%	3.13%
Four years	2.90%	3.49%
Five years	3.12%	0.00%
After five years	0.00%	0.00%
Total advances from FHLB	2.57%	1.89%