PRESENTATION OF DEBT ISSUANCE COSTS (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Other Assets	$ 38,732	$ 19,244
Assets	3,781,959	2,288,524
Junior subordinated debentures	15,878	15,873
Liabilities	$ 3,440,831	2,113,406
Accounting Standards Update 2015-03 | As previously reported
Debt Instrument [Line Items]
Other Assets		19,373
Assets		2,288,653
Junior subordinated debentures		16,002
Liabilities		2,113,535
Accounting Standards Update 2015-03 | As reported under the new guidance
Debt Instrument [Line Items]
Other Assets		19,244
Assets		2,288,524
Junior subordinated debentures		15,873
Liabilities		$ 2,113,406