OTHER BORROWINGS - Components of Other Borrowings (Parenthetical) (Detail)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Junior Subordinated Debentures Bearing Interest At Floating Rate Of Two Point Seventy Five [Member]
Debt Instrument [Line Items]
Floating Interest rate on junior subordinated debentures	3.02%	2.99%
Subordinated Borrowing Due Date	Jun. 17, 2034
Callable step-rate notes rate	2.75%
Junior Subordinated Debentures Bearing Interest At Floating Rate Of Two Point Fifty Percent [Member]
Debt Instrument [Line Items]
Floating Interest rate on junior subordinated debentures	2.77%	2.75%
Subordinated Borrowing Due Date	Sep. 20, 2034
Callable step-rate notes rate	2.50%