INVESTMENT SECURITIES - Contractual Final Maturity Distribution of Debt Securities Classified as Available for Sale and Held to Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Available for Sale, Fair Value
Within One Year	$ 100
After One But Within Five Years	154,630
After Five But Within Ten Years	5,996
Securities not due at a Single Maturity	127,263
Total	287,989	$ 333,998
Available for Sale, Amortized Cost
Within One Year	100
After One But Within Five Years	155,281
After Five But Within Ten Years	5,926
Securities not due at a Single Maturity	127,574
Total	288,881	334,846
Held to Maturity, Fair Value
After Ten Years	16,979
Securities not due at a Single Maturity	64,109
Total	81,088	85,749
Held to Maturity, Amortized Cost
After Ten Years	16,864
Securities not due at a Single Maturity	64,127
Total	80,991	85,694
U.S. Treasury Obligations
Available for Sale, Fair Value
Within One Year	100
After One But Within Five Years	10,064
Total	10,164	25,183
Available for Sale, Amortized Cost
Within One Year	100
After One But Within Five Years	9,989
Total	10,089	25,079
U.S. Agency Obligations
Held to Maturity, Fair Value
After Ten Years	16,979
Total	16,979	17,935
Held to Maturity, Amortized Cost
After Ten Years	16,864
Total	16,864	17,849
U.S. GSEs
Available for Sale, Fair Value
After One But Within Five Years	83,512
Total	83,512	93,353
Available for Sale, Amortized Cost
After One But Within Five Years	83,916
Total	83,916	93,883
FHLB Obligations
Available for Sale, Fair Value
After One But Within Five Years	61,054
After Five But Within Ten Years	5,996
Total	67,050	67,006
Available for Sale, Amortized Cost
After One But Within Five Years	61,376
After Five But Within Ten Years	5,926
Total	67,302	67,362
Agency MBSs
Available for Sale, Fair Value
Securities not due at a Single Maturity	64,277
Total	64,277	75,209
Available for Sale, Amortized Cost
Securities not due at a Single Maturity	63,919
Total	63,919	74,573
Held to Maturity, Fair Value
Securities not due at a Single Maturity	5,649
Total	5,649	5,879
Held to Maturity, Amortized Cost
Securities not due at a Single Maturity	5,548
Total	5,548	5,787
Agency CMBSs
Available for Sale, Fair Value
Securities not due at a Single Maturity	23,370
Total	23,370	23,608
Available for Sale, Amortized Cost
Securities not due at a Single Maturity	23,784
Total	23,784	23,972
Agency CMOs
Available for Sale, Fair Value
Securities not due at a Single Maturity	39,616
Total	39,616	49,333
Available for Sale, Amortized Cost
Securities not due at a Single Maturity	39,871
Total	39,871	49,694
Held to Maturity, Fair Value
Securities not due at a Single Maturity	58,460
Total	58,460	61,935
Held to Maturity, Amortized Cost
Securities not due at a Single Maturity	58,579
Total	$ 58,579	62,058
ABSs
Available for Sale, Fair Value
Total		306
Available for Sale, Amortized Cost
Total		$ 283