SECURITIES (Schedule of Securities Pledged to Secure Public Deposits, Repurchase Agreements, and for Other Purposes) (Details) - USD ($) $ in Thousands		Sep. 30, 2015	Dec. 31, 2014
Available-for-sale Securities [Member]
Schedule of Investments [Line Items]
Total pledged AFS Securities, fair value		$ 299,137	$ 396,995
Available-for-sale Securities [Member] | Public Deposits [Member]
Schedule of Investments [Line Items]
Total pledged AFS Securities, fair value		150,632	312,793
Available-for-sale Securities [Member] | Repurchase Agreements [Member]
Schedule of Investments [Line Items]
Total pledged AFS Securities, fair value		118,249	51,842
Available-for-sale Securities [Member] | Other Purposes [Member]
Schedule of Investments [Line Items]
Total pledged AFS Securities, fair value	[1]	30,256	$ 32,360
Held-to-maturity Securities [Member]
Schedule of Investments [Line Items]
Total pledged HTM securities, fair value		200,319
Held-to-maturity Securities [Member] | Public Deposits [Member]
Schedule of Investments [Line Items]
Total pledged HTM securities, fair value		$ 200,319

[1] The "Other purposes" category consists of borrowings, derivatives, and accounts held at the Bank.