RECENT ACCOUNTING PRONOUNCEMENTS NEW ACCOUNTING PRONOUNCEMENTS (Narrative) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Available-for-sale Securities	$ 797,251	$ 779,867
Available-for-sale Securities, Amortized Cost Basis	805,198	789,229
Equity Securities [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Available-for-sale Securities	741	741
Available-for-sale Securities, Amortized Cost Basis	$ 623	$ 632