FAIR VALUE MEASUREMENTS- Assets and Liabilities on Recurring and Nonrecurring Basis and Level 3 Valuation Measurements (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014
Investment securities available for sale	$ 689,132	$ 672,421
Foreclosed assets	15,346	12,891
Derivative assets	996	2,368
Derivative liabilities	4,376	2,497
Level 1
Investment securities available for sale	16,532	66,028
SBA loans held for investment	0	0
Derivative assets	0	0
Derivative liabilities	0	0
Level 2
Investment securities available for sale	665,872	595,103
SBA loans held for investment	40,500	40,404
Derivative assets	588	2,027
Derivative liabilities	4,376	2,497
Level 3
Investment securities available for sale	6,728	11,290
SBA loans held for investment	0	0
Derivative assets	408	342
Derivative liabilities		0
Recurring \| Level 1
Derivative assets	0	0
Derivative liabilities	0	0
Recurring \| Level 1 \| GSE obligations
Investment securities available for sale	0	0
Recurring \| Level 1 \| SBA-guaranteed securities
Investment securities available for sale	12,176	60,120
SBA-guaranteed loans held for sale	0	0
SBA loans held for investment	0	0
Recurring \| Level 1 \| Mortgage-backed securities issued by GSE
Investment securities available for sale	0	0
Recurring \| Level 1 \| Collateralized loan obligations
Investment securities available for sale	0
Recurring \| Level 1 \| Corporate bonds
Investment securities available for sale	2,485	2,545
Recurring \| Level 1 \| Non-agency RMBS
Investment securities available for sale	0	0
Recurring \| Level 1 \| Non-agency CMBS
Investment securities available for sale		0
Recurring \| Level 1 \| Municipal bonds
Investment securities available for sale	0	0
Recurring \| Level 1 \| Other debt securities
Investment securities available for sale	245	498
Recurring \| Level 1 \| Marketable equity securities
Investment securities available for sale	1,626	2,865
Recurring \| Level 2
Derivative assets	588	2,026
Recurring \| Level 2 \| GSE obligations
Investment securities available for sale	5,982	14,944
Recurring \| Level 2 \| SBA-guaranteed securities
Investment securities available for sale	0	0
SBA-guaranteed loans held for sale	23,664	8,365
SBA loans held for investment	20,423	8,906
Recurring \| Level 2 \| Mortgage-backed securities issued by GSE
Investment securities available for sale	435,625	425,283
Recurring \| Level 2 \| Collateralized loan obligations
Investment securities available for sale	50,483
Recurring \| Level 2 \| Corporate bonds
Investment securities available for sale	115,427	106,077
Recurring \| Level 2 \| Non-agency RMBS
Investment securities available for sale	3,663	4,963
Recurring \| Level 2 \| Non-agency CMBS
Investment securities available for sale		3,578
Recurring \| Level 2 \| Municipal bonds
Investment securities available for sale	54,692	40,258
Recurring \| Level 2 \| Other debt securities
Investment securities available for sale	0	0
Recurring \| Level 2 \| Marketable equity securities
Investment securities available for sale	0	0
Recurring \| Level 3
Derivative assets	408	342
Derivative liabilities	0	0
Recurring \| Level 3 \| Available-for-sale Securities \| Pricing model
Investment securities available for sale	$ 6,728	11,290
Valuation Technique	Pricing model
Unobservable Input	Illiquidity or credit factor in discount rates
Recurring \| Level 3 \| Available-for-sale Securities \| Pricing model \| Minimum
Illiquidity of credit (as a percentage)	1.00%
Recurring \| Level 3 \| Available-for-sale Securities \| Pricing model \| Maximum
Illiquidity of credit (as a percentage)	2.00%
Recurring \| Level 3 \| Interest rate lock commitments \| Pricing model
Interest rate derivative assets, at fair value	$ 408	342
Valuation Technique	Pricing model
Unobservable Input	Pull through rates
Recurring \| Level 3 \| Interest rate lock commitments \| Pricing model \| Minimum
Pull through rates (as a percentage)	80.00%
Recurring \| Level 3 \| Interest rate lock commitments \| Pricing model \| Maximum
Pull through rates (as a percentage)	95.00%
Recurring \| Level 3 \| GSE obligations
Investment securities available for sale	$ 0	0
Recurring \| Level 3 \| SBA-guaranteed securities
Investment securities available for sale	0	0
SBA-guaranteed loans held for sale	0	0
SBA loans held for investment	0	0
Recurring \| Level 3 \| Mortgage-backed securities issued by GSE
Investment securities available for sale	0	0
Recurring \| Level 3 \| Collateralized loan obligations
Investment securities available for sale	0
Recurring \| Level 3 \| Corporate bonds
Investment securities available for sale	5,620	11,290
Recurring \| Level 3 \| Non-agency RMBS
Investment securities available for sale	0	0
Recurring \| Level 3 \| Non-agency CMBS
Investment securities available for sale		0
Recurring \| Level 3 \| Municipal bonds
Investment securities available for sale	1,108	0
Recurring \| Level 3 \| Other debt securities
Investment securities available for sale	0	0
Recurring \| Level 3 \| Marketable equity securities
Investment securities available for sale	0	0
Nonrecurring \| Level 1 \| Impaired loans
Impaired loans	0	0
Nonrecurring \| Level 1 \| Foreclosed assets
Foreclosed assets	0	0
Nonrecurring \| Level 2 \| Impaired loans
Impaired loans	0	0
Nonrecurring \| Level 2 \| Foreclosed assets
Foreclosed assets	0	0
Nonrecurring \| Level 3 \| Impaired loans
Impaired loans	$ 15,066	9,595
Nonrecurring \| Level 3 \| Impaired loans \| Discounted appraisals
Valuation Technique	Discounted appraisals
Unobservable Input	Collateral discounts
Nonrecurring \| Level 3 \| Impaired loans \| Discounted appraisals \| Minimum
Collateral discounts (as a percentage)	15.00%
Nonrecurring \| Level 3 \| Impaired loans \| Discounted appraisals \| Maximum
Collateral discounts (as a percentage)	50.00%
Nonrecurring \| Level 3 \| Impaired loans \| Discounted expected cash flows
Valuation Technique	Discounted expected cash flows
Unobservable Input	Expected loss rates
Nonrecurring \| Level 3 \| Impaired loans \| Discounted expected cash flows \| Minimum
Expected loss rates (as a percentage)	0.00%
Discount rates (as a percent)	2.00%
Nonrecurring \| Level 3 \| Impaired loans \| Discounted expected cash flows \| Maximum
Expected loss rates (as a percentage)	75.00%
Discount rates (as a percent)	8.00%
Nonrecurring \| Level 3 \| Impaired loans \| Discount rates
Unobservable Input	Discount rates
Nonrecurring \| Level 3 \| Foreclosed assets
Foreclosed assets	$ 15,346	12,891
Nonrecurring \| Level 3 \| Foreclosed assets \| Discounted appraisals
Foreclosed assets		12,891
Valuation Technique	Discounted appraisals
Unobservable Input	Collateral discounts
Nonrecurring \| Level 3 \| Foreclosed assets \| Discounted appraisals \| Minimum
Collateral discounts (as a percentage)	15.00%
Nonrecurring \| Level 3 \| Foreclosed assets \| Discounted appraisals \| Maximum
Collateral discounts (as a percentage)	50.00%
Estimate of Fair Value Measurement
Investment securities available for sale	$ 689,132	672,421
SBA loans held for investment	40,500	40,404
Derivative assets	996	2,368
Derivative liabilities	4,376	2,497
Estimate of Fair Value Measurement \| Recurring
Derivative assets	996	2,368
Estimate of Fair Value Measurement \| Recurring \| GSE obligations
Investment securities available for sale	5,982	14,944
Estimate of Fair Value Measurement \| Recurring \| SBA-guaranteed securities
Investment securities available for sale	12,176	60,120
SBA-guaranteed loans held for sale	23,664	8,365
SBA loans held for investment	20,423	8,906
Estimate of Fair Value Measurement \| Recurring \| Mortgage-backed securities issued by GSE
Investment securities available for sale	435,625	425,283
Estimate of Fair Value Measurement \| Recurring \| Collateralized loan obligations
Investment securities available for sale	50,483
Estimate of Fair Value Measurement \| Recurring \| Corporate bonds
Investment securities available for sale	123,532	119,912
Estimate of Fair Value Measurement \| Recurring \| Non-agency RMBS
Investment securities available for sale	3,663	4,963
Estimate of Fair Value Measurement \| Recurring \| Non-agency CMBS
Investment securities available for sale		3,578
Estimate of Fair Value Measurement \| Recurring \| Municipal bonds
Investment securities available for sale	55,800	40,258
Estimate of Fair Value Measurement \| Recurring \| Other debt securities
Investment securities available for sale	245	498
Estimate of Fair Value Measurement \| Recurring \| Marketable equity securities
Investment securities available for sale	1,626	2,865
Estimate of Fair Value Measurement \| Nonrecurring \| Impaired loans
Impaired loans	15,066	9,595
Estimate of Fair Value Measurement \| Nonrecurring \| Foreclosed assets
Foreclosed assets	15,346	12,891
Estimate of Fair Value Measurement \| Nonrecurring \| Foreclosed assets \| Discounted appraisals
Foreclosed assets	15,346
Pay fixed interest rate swaps \| Recurring \| Level 2
Derivative liabilities	4,376	2,497
Pay fixed interest rate swaps \| Estimate of Fair Value Measurement \| Recurring
Derivative liabilities	$ 4,376	$ 2,497

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

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Carrying amount as of the balance sheet date of all assets obtained in full or partial satisfaction of a debt arrangement through foreclosure proceedings or defeasance; includes real and personal property; equity interests in corporations, partnerships, and joint ventures; and beneficial interests in trusts.

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Fair value of investments in debt securities classified as held-to-maturity.

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Fair value as of the balance sheet date of interest rate derivative assets, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as assets.

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Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables.

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