SECURITIES (Schedule of Securities Pledged to Secure Public Deposits, Repurchase Agreements, and for Other Purposes) (Details) - USD ($) $ in Thousands		Mar. 31, 2016	Dec. 31, 2015
Available-for-sale Securities [Member]
Schedule of Investments [Line Items]
Total pledged AFS securities, fair value		$ 328,150	$ 337,301
Available-for-sale Securities [Member] | Public Deposits [Member]
Schedule of Investments [Line Items]
Total pledged AFS securities, fair value		182,313	184,635
Available-for-sale Securities [Member] | Repurchase Agreements [Member]
Schedule of Investments [Line Items]
Total pledged AFS securities, fair value		120,351	126,120
Available-for-sale Securities [Member] | Other Purposes [Member]
Schedule of Investments [Line Items]
Total pledged AFS securities, fair value	[1]	25,486	26,546
Held-to-maturity Securities [Member]
Schedule of Investments [Line Items]
Total pledged HTM securities, fair value		210,349	207,140
Held-to-maturity Securities [Member] | Public Deposits [Member]
Schedule of Investments [Line Items]
Total pledged HTM securities, fair value		$ 210,349	$ 207,140

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