SECURITIES (Narrative) (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2015 USD ($) security	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) security	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Schedule of Investments [Line Items]
Net unrealized gains (losses) on available-for-sale securities, net of tax	$ (181,000)		$ (181,000)		$ (319,000)
Deferred tax assets, unrealized losses on available for sale securities	$ 97,000		97,000		172,000
Payments to acquire investments			$ 96,200,000
AFS securities in unrealized loss positions, number of positions | security	137		137
AFS and HTM securities in continuous unrealized loss position	$ 409,700,000		$ 409,700,000
AFS and HTM Securities unrealized loss accumulated in investments	$ 8,200,000		$ 8,200,000
Unrealized Loss as a Percent of Amortized Cost	1.00%		1.00%
Fair Value - 12 Months of More	$ 213,320,000		$ 213,320,000		307,951,000
OTTI, investments, available-for-sale securities			0	$ 0
Investment securities sold, carrying amount	0	$ 16,000,000	0	25,200,000
Gain (loss) on investments	0	$ 285,000	0	$ 451,000
Security pledged as collateral, amortized cost	479,600,000		479,600,000		486,200,000
Security pledged as collateral, fair value	$ 478,700,000		$ 478,700,000		485,600,000
Mortgage Backed Securities and Collateralized Mortgage Obligations [Member]
Schedule of Investments [Line Items]
AFS securities in unrealized loss positions, number of positions greater than or equal to one year | security	36		36
Fair Value - 12 Months of More	$ 213,300,000		$ 213,300,000
Private issue collateralized mortgage obligations
Schedule of Investments [Line Items]
AFS securities in unrealized loss positions, number of positions greater than or equal to one year | security	0		0
Fair Value - 12 Months of More	$ 0		$ 0		$ 0
Available-for-sale Securities
Schedule of Investments [Line Items]
Payments to acquire investments			56,000,000
Held-to-maturity Securities
Schedule of Investments [Line Items]
Payments to acquire investments			$ 40,200,000