SECURITIES (Securities with Unrealized Losses Aggregated by Investment Category and Length of Time Individual Securities have been in Continuous Unrealized Loss Position) (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Investments, Unrealized Loss Position [Line Items]
Less than 12 Months Fair Value	$ 238,286	$ 45,075
Less than 12 Months Unrealized Loss	(6,025)	(392)
12 Months or More Fair Value	20,096	0
12 Months or More Unrealized Loss	(856)	0
Total Fair Value	258,382	45,075
Total Unrealized Loss	(6,881)	(392)
U S Treasury and Government [Member]
Investments, Unrealized Loss Position [Line Items]
Less than 12 Months Fair Value	94,641	11,877
Less than 12 Months Unrealized Loss	(2,522)	(69)
12 Months or More Fair Value	5,996	0
12 Months or More Unrealized Loss	(386)	0
Total Fair Value	100,637	11,877
Total Unrealized Loss	(2,908)	(69)
Residential Mortgage Backed Securities [Member]
Investments, Unrealized Loss Position [Line Items]
Less than 12 Months Fair Value	116,709	18,142
Less than 12 Months Unrealized Loss	(2,241)	(84)
12 Months or More Fair Value	7,530	0
12 Months or More Unrealized Loss	(94)	0
Total Fair Value	124,239	18,142
Total Unrealized Loss	(2,335)	(84)
Municipal and Other Obligations [Member]
Investments, Unrealized Loss Position [Line Items]
Less than 12 Months Fair Value	26,936	15,056
Less than 12 Months Unrealized Loss	(1,262)	(239)
12 Months or More Fair Value	6,570	0
12 Months or More Unrealized Loss	(376)	0
Total Fair Value	33,506	15,056
Total Unrealized Loss	$ (1,638)	$ (239)