GOODWILL, OTHER INTANGIBLE ASSETS AND MORTGAGE SERVICING RIGHTS (Mortgage Servicing Rights) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Servicing Asset at Amortized Value, Balance [Roll Forward]
Additions—acquired through business combinations		$ 0	$ 0	$ 2,172	$ 0
Valuation adjustments in the period				0	0
Mortgage Servicing Rights [Member]
Morgage Servicing Rights at Amortized Value [Line Items]
Loans Serviced For Others		2,225,000		2,225,000		$ 1,391,000
Custodial Accounts		13,600		13,600		$ 6,700
Servicing Asset at Amortized Value, Balance [Roll Forward]
Balance, net of valuation allowance, beginning of the period		12,329	8,481	9,030	8,086
Additions—amounts capitalized		1,360	846	4,052	2,215
Amortization	[1]	(810)	(543)	(2,375)	(1,517)
Valuation adjustments in the period		0	0	0	0
Balance, net of valuation allowance, end of the period	[2]	12,879	$ 8,784	12,879	$ 8,784
Valuation allowance, end of period	[2]	$ 0		$ 0

[1] Amortization of mortgage servicing rights is recorded as a reduction of loan servicing income and any unamortized balance is fully written off if the loan repays in full.

[2] There was no valuation allowance as of September 30, 2015 and 2014.