SECURITIES - Schedule of Unrealized Loss and Fair Value on Investments (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Fair Value
Less than 12 months	$ 156,048	$ 430,644
12 months or longer	216,718	80,700
Total	372,766	511,344
Unrealized Losses
Less than 12 months	(1,112)	(15,561)
12 months or longer	(7,398)	(4,442)
Total	(8,510)	(20,003)
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Fair Value
Less than 12 months	0	33,425
12 months or longer	29,537	35,043
Total	29,537	68,468
Unrealized Losses
Less than 12 months	0	(2,045)
12 months or longer	(512)	(2,144)
Total	(512)	(4,189)
Collateralized Mortgage Obligations Of Us Government Sponsored Entities [Member]
Fair Value
Less than 12 months	126,407	287,312
12 months or longer	165,892	45,657
Total	292,299	332,969
Unrealized Losses
Less than 12 months	(778)	(12,450)
12 months or longer	(6,586)	(2,297)
Total	(7,364)	(14,747)
Private mortage backed securities [Member]
Fair Value
Less than 12 months		29,573
12 months or longer		0
Total		29,573
Unrealized Losses
Less than 12 months		(226)
12 months or longer		0
Total		(226)
Private collaterlized mortgage obligations [Member]
Fair Value
Less than 12 months	7,043	47,653
12 months or longer	11,626	0
Total	18,669	47,653
Unrealized Losses
Less than 12 months	(105)	(413)
12 months or longer	(131)	0
Total	(236)	(413)
Collateralized Loan Obligations [Member]
Fair Value
Less than 12 months	22,598	32,179
12 months or longer	9,663	0
Total	32,261	32,179
Unrealized Losses
Less than 12 months	(229)	(413)
12 months or longer	(169)	0
Total	(398)	(413)
Obligations of state and political subdivisions [Member]
Fair Value
Less than 12 months		502
12 months or longer		0
Total		502
Unrealized Losses
Less than 12 months		(14)
12 months or longer		(1)
Total		$ (15)