INVESTMENT SECURITIES - Summary of Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Securities available for sale:
Amortized Cost	$ 694,511	$ 674,156
Gross Unrealized Gains	2,196	2,822
Gross Unrealized Losses	7,575	4,557
Fair Value	689,132	672,421
GSE obligations
Securities available for sale:
Amortized Cost	5,980	14,914
Gross Unrealized Gains	3	30
Gross Unrealized Losses	1	0
Fair Value	5,982	14,944
SBA-guaranteed securities
Securities available for sale:
Amortized Cost	12,114	60,408
Gross Unrealized Gains	74	84
Gross Unrealized Losses	12	372
Fair Value	12,176	60,120
Mortgage-backed securities issued by GSE
Securities available for sale:
Amortized Cost	440,654	428,076
Gross Unrealized Gains	887	1,086
Gross Unrealized Losses	5,916	3,879
Fair Value	435,625	425,283
Municipal bonds
Securities available for sale:
Amortized Cost	55,402	39,907
Gross Unrealized Gains	504	355
Gross Unrealized Losses	106	4
Fair Value	55,800	40,258
Securities held to maturity:
Amortized Cost	39,182	39,620
Gross Unrealized Gains	1,318	966
Gross Unrealized Losses	0	0
Fair Value	40,500	40,586
Corporate bonds
Securities available for sale:
Amortized Cost	123,669	118,799
Gross Unrealized Gains	551	1,261
Gross Unrealized Losses	688	148
Fair Value	123,532	119,912
Collateralized loan obligations
Securities available for sale:
Amortized Cost	50,538
Gross Unrealized Gains	0
Gross Unrealized Losses	55
Fair Value	50,483
Non-agency RMBS
Securities available for sale:
Amortized Cost	3,528	4,961
Gross Unrealized Gains	144	3
Gross Unrealized Losses	9	1
Fair Value	3,663	4,963
Non-agency CMBS
Securities available for sale:
Amortized Cost		3,576
Gross Unrealized Gains		2
Gross Unrealized Losses		0
Fair Value		3,578
Other debt securities
Securities available for sale:
Amortized Cost	245	498
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	245	498
Marketable equity securities
Securities available for sale:
Amortized Cost	2,381	3,017
Gross Unrealized Gains	33	1
Gross Unrealized Losses	788	153
Fair Value	$ 1,626	$ 2,865

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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