DEPOSITS AND RETAIL REPURCHASE AGREEMENTS (Deposit Liabilities) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Deposits:
Non-interest-bearing accounts	$ 1,561,516	$ 1,298,866
Interest-bearing checking	482,530	439,480
Regular savings accounts	1,030,177	901,142
Money market accounts	582,769	488,946
Total transaction and saving accounts	3,656,992	3,128,434
Certificates of deposit	730,661	770,516
Total deposits	4,387,653	3,898,950
Included in total deposits:
Public fund transaction accounts	123,260	102,854
Public fund interest-bearing certificates	27,791	35,346
Total public deposits	151,051	138,200
Total brokered deposits	$ 10,095	$ 4,799