COMMITMENTS AND CONTINGENCIES COMMITMENTS AND CONTINGENCIES Schedule of customer loan swaps (Details) $ in Thousands		Jun. 30, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Derivative [Line Items]
Derivative, Number of Instruments Held		2
Interest rate swaps
Derivative [Line Items]
Notional amount of derivative		$ 43,000	$ 43,000
Derivative, fair value	[1]	$ (13,265)	$ (9,229)
Interest rate swaps | Federal home loan bank 30-day
Derivative [Line Items]
Derivative, Number of Instruments Held	[2]	44		28
Notional amount of derivative	[2]	$ 232,257		$ 142,944
Derivative, fair value	[2]	$ 15,001		$ 3,166
Commercial and Industrial Sector | Interest rate swaps
Derivative [Line Items]
Derivative, Number of Instruments Held	[3]	44		28
Notional amount of derivative	[3]	$ 232,257		$ 142,944
Derivative, fair value	[3]	$ (15,001)		$ (3,166)

[1] Presented within accrued interest and other liabilities on the consolidated statements of condition.

[2] Presented within other assets on the consolidated statements of condition.

[3] Presented within accrued interest and other liabilities on the consolidated statements of condition.