GOODWILL AND OTHER INTANGIBLE ASSETS, NET - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 39,244		$ 39,244		$ 39,244
Impairment on intangible assets	0	$ 0	0	$ 258
Aggregate amortization expense	1,179	$ 1,401	3,823	4,490
Commercial Banking
Finite-Lived Intangible Assets [Line Items]
Goodwill	37,100		37,100
Mortgage Banking
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 2,100		$ 2,100
Core deposit intangibles
Finite-Lived Intangible Assets [Line Items]
Impairment on intangible assets				$ 258
Weighted average amortization period			6 years 9 months 27 days
Core deposit intangibles | Minimum
Finite-Lived Intangible Assets [Line Items]
Amortization period of other intangible assets			4 years
Core deposit intangibles | Maximum
Finite-Lived Intangible Assets [Line Items]
Amortization period of other intangible assets			10 years
Customer relationship intangible
Finite-Lived Intangible Assets [Line Items]
Amortization period of other intangible assets			5 years
Remaining amortization period			2 years 4 months