INVESTMENT SECURITIES, Amortized Cost, Maturities and Approximate Fair Value (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Amortized Cost [Abstract]
Due in one year or less	$ 22,134		$ 22,134
Due from one to five years	129,676		129,676
Due from five to ten years	38,283		38,283
Total securities available for sale	190,093		190,093		$ 244,706
Fair Value [Abstract]
Due in one year or less	22,402		22,402
Due from one to five years	133,050		133,050
Due from five to ten years	38,821		38,821
Total securities available for sale	194,273		194,273		247,099
Amortized Cost [Abstract]
Due in one year or less	2,636		2,636
Due from one to five years	1,344		1,344
Due from five to ten years	8,375		8,375
Due after ten years	6,541		6,541
Amortized Cost	18,896		18,896		61,309
Fair Value [Abstract]
Due in one year or less	2,714		2,714
Due from one to five years	1,393		1,393
Due from five to ten years	8,663		8,663
Due after ten years	6,863		6,863
Total securities held to maturity	19,633		19,633		63,272
Total Amortized Cost	208,989		208,989		306,015
Total Fair Value	213,906		213,906		310,371
Contingent liability from counterparty estimated future exposure from Visa litigation	752		752		752
Approximate cash payment per quarter for Visa litigation	87	$ 73	243	$ 214
US Government agency securities held as available-for-sale pledged as collateral	$ 3,000		$ 3,000		$ 3,000
Shares of Visa Class B securities held (in shares)	38,638		38,638		38,638