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LOANS (Acquired credit impaired loans receivable) (Detail) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Jan. 01, 2018
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Acquired During Period [Abstract]      
Contractual principal and interest at acquisition     $ 49,412
Contractual cash flows not expected to be collected (Nonaccretable yield)     (17,915)
Expected cash flows at acquisition     31,497
Interest component of expected cash flows (Accretable yield)     (3,988)
Fair value of purchase credit impaired loans $ 11,200 $ 15,300 $ 27,509