OTHER EQUITY SECURITIES - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Schedule Of Other Assets [Line Items]
Capital stock par value	$ 100
Book value of investment in FHLB stock	$ 40,800	$ 31,300
Dividend income from FHLB stock	1,500	1,100	$ 1,200
Carrying value of other equity security	2,200	900
Gain Loss On Sale Of Securities Net	$ 6,104	$ 0	$ 262