GOODWILL AND OTHER INTANGIBLES - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Jun. 30, 2012
Finite Lived Intangible Assets [Line Items]
Goodwill	$ 28,100	$ 28,100
Purchase credit card relationship intangible amount				$ 24,500
Amortization expense	4,896	5,143	$ 4,943
Business Combination Finite Lived Intangible Assets Net	4,400	5,100
Purchased Credit Card Relationship Intangible [Member]
Finite Lived Intangible Assets [Line Items]
Purchase credit card relationship intangible amount	$ 24,465	$ 24,465
Amortization period of purchased credit card relationship intangible	5 years	5 years 9 months 18 days
Core Deposits [Member]
Finite Lived Intangible Assets [Line Items]
Purchase credit card relationship intangible amount	$ 51,664	$ 45,844
Amortization period of purchased credit card relationship intangible	8 years 1 month 6 days	9 years
Customer Related Intangible Assets Member
Finite Lived Intangible Assets [Line Items]
Purchase credit card relationship intangible amount	$ 1,067	$ 0
Amortization period of purchased credit card relationship intangible	6 years 1 month 6 days	0 years