INVESTMENTS (Amortized Cost and Estimated Fair Values of Debt Securities Held-To-Maturity by Contractual Maturity) (Detail) $ in Thousands	Dec. 31, 2015 USD ($)
Amortized Cost
Due in one year or less	$ 845
Due after one year through five years	19,217
Due after five years through ten years	163,125
Due after ten years	25,078
Total debt securities held-to-maturity	208,265
Estimated Fair Value
Due in one year or less	853
Due after one year through five years	20,041
Due after five years through ten years	165,620
Due after ten years	25,190
Total debt securities held-to-maturity	$ 211,704