BORROWINGS (Advances from FHLB and Respective Maturity Schedule) (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Maturity:
One Year	$ 470,000	$ 280,000
Two Years	150,000	75,000
Three Years	80,000	160,000
Four Years	80,000	80,000
Five Years	10,000	80,000
After five years	0	10,000
Total advances from FHLB	$ 790,000	$ 685,000
Maturity:
One Year	0.65%	0.38%
Two Years	2.40%	3.48%
Three years	3.50%	2.45%
Four years	3.54%	3.50%
Five years	3.49%	3.54%
After five years	0.00%	3.49%
Total advances from FHLB	1.60%	1.98%