INVESTMENT SECURITIES - UNREALIZED LOSSES AND FAIR VALUE OF SECURITIES IN A CONITINUOS LOSS POSITION (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Securities available for sale:
Less Than 12 Months, Fair Value	$ 223,831	$ 313,649
Less Than 12 Months, Unrealized Losses	1,040	3,992
12 Months or More, Fair Value	61,403	121,742
12 months or more, unrealized losses	1,905	3,583
Total Fair Value	285,234	435,391
Total Unrealized Losses	2,945	7,575
GSE obligations
Securities available for sale:
Less Than 12 Months, Fair Value		999
Less Than 12 Months, Unrealized Losses		1
12 Months or More, Fair Value		0
12 months or more, unrealized losses		0
Total Fair Value		999
Total Unrealized Losses	0	1
SBA-guaranteed securities
Securities available for sale:
Less Than 12 Months, Fair Value	2,464	5,043
Less Than 12 Months, Unrealized Losses	11	12
12 Months or More, Fair Value	0	0
12 months or more, unrealized losses	0	0
Total Fair Value	2,464	5,043
Total Unrealized Losses	11	12
Mortgage-backed securities issued by GSEs
Securities available for sale:
Less Than 12 Months, Fair Value	120,411	208,620
Less Than 12 Months, Unrealized Losses	530	2,453
12 Months or More, Fair Value	37,302	117,144
12 months or more, unrealized losses	338	3,463
Total Fair Value	157,713	325,764
Total Unrealized Losses	868	5,916
Municipal bonds
Securities available for sale:
Less Than 12 Months, Fair Value	19,144	8,995
Less Than 12 Months, Unrealized Losses	163	106
12 Months or More, Fair Value	0	0
12 months or more, unrealized losses	0	0
Total Fair Value	19,144	8,995
Total Unrealized Losses	163	106
Corporate bonds
Securities available for sale:
Less Than 12 Months, Fair Value	41,816	43,110
Less Than 12 Months, Unrealized Losses	218	577
12 Months or More, Fair Value	22,588	3,697
12 months or more, unrealized losses	900	111
Total Fair Value	64,404	46,807
Total Unrealized Losses	1,118	688
Collateralized loan obligations
Securities available for sale:
Less Than 12 Months, Fair Value	30,909	45,471
Less Than 12 Months, Unrealized Losses	76	55
12 Months or More, Fair Value	0	0
12 months or more, unrealized losses	0	0
Total Fair Value	30,909	45,471
Total Unrealized Losses	76	55
Non-agency RMBS
Securities available for sale:
Less Than 12 Months, Fair Value		0
Less Than 12 Months, Unrealized Losses		0
12 Months or More, Fair Value		901
12 months or more, unrealized losses		9
Total Fair Value		901
Total Unrealized Losses		9
Non-agency CMBS
Securities available for sale:
Less Than 12 Months, Fair Value	9,087
Less Than 12 Months, Unrealized Losses	42
12 Months or More, Fair Value	0
12 months or more, unrealized losses	0
Total Fair Value	9,087
Total Unrealized Losses	42
Equity securities
Securities available for sale:
Less Than 12 Months, Fair Value	0	1,411
Less Than 12 Months, Unrealized Losses	0	788
12 Months or More, Fair Value	1,513	0
12 months or more, unrealized losses	667	0
Total Fair Value	1,513	1,411
Total Unrealized Losses	$ 667	$ 788