DUE TO DEPOSITORS (Details) - USD ($) $ in Thousands		Dec. 31, 2015	Dec. 31, 2014
Deposits [Abstract]
Savings accounts		$ 368,671	$ 372,753
Certificates of deposit ("CDs")		858,847	926,318
Money market accounts		1,618,617	1,094,698
Interest bearing checking accounts		78,994	78,430
Non-interest bearing checking accounts		259,181	187,593
Total deposits		$ 3,184,310	$ 2,659,792
Weighted Average Rate Domestic Deposit Liabilities [Abstract]
Savings accounts (in hundredths)		0.05%	0.05%
Certificates of deposit ("CDs") (in hundredths)		1.44%	1.43%
Money market accounts (in hundredths)		0.81%	0.61%
Interest bearing checking accounts (in hundredths)		0.08%	0.08%
Effective cost on noninterest bearing accounts (in hundredths)		0.00%	0.00%
TOTAL (in hundredths)		0.81%	0.76%
Maturities of Time Deposits [Abstract]
2016		$ 304,694
2017		266,060
2018		126,345
2018		114,711
2019		40,848
2021 and beyond		6,189
TOTAL		$ 858,847
Weighted Average Rate of Time Deposits [Abstract]
2016		0.88%
2017		1.50%
2018		2.04%
2019		1.98%
2020		1.66%
2021 and beyond		1.72%
TOTAL	[1]	1.44%
Weighted average cost of CDs, inclusive of their contractual compounding of interest (in hundredths)		1.44%
Aggregate amount of CDs $100,000 or More		$ 138,022	$ 122,603

[1] The weighted average cost of CDs, inclusive of their contractual compounding of interest, was 1.44% at December 31, 2015.