MERGERS AND ACQUISITIONS - Balance Sheet - Yadkin (Details) - USD ($)			12 Months Ended
		Jul. 04, 2014	Dec. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Cash and cash equivalents			$ 60,783,000	$ 65,312,000
Investment securities available for sale			689,132,000	672,421,000
Loans, net			3,066,775,000	2,890,449,000
Foreclosed assets			15,346,000	12,891,000
Deferred tax asset, net			59,850,000	76,105,000
Goodwill			152,152,000	152,152,000
Accrued interest receivable and other assets			53,032,000	36,506,000
Total assets			4,474,144,000	4,268,034,000
Deposits			3,310,297,000	3,247,364,000
Short-term borrowings			375,500,000	250,500,000
Long-term debt			194,967,000	180,164,000
Accrued interest payable and other liabilities			30,831,000	32,204,000
Total liabilities			3,911,595,000	3,710,232,000
Preferred stock			0	28,405,000
Common stock warrants			$ 717,000	$ 717,000
Yadkin Financial Corporation
Business Acquisition [Line Items]
Cash and cash equivalents		$ 36,116,000
Investment securities available for sale		257,655,000
Loans held for sale		15,696,000
Loans, net		1,372,679,000
Federal Home Loan Bank stock, at cost		3,778,000
Premises and equipment		37,860,000
Bank-owned life insurance		27,306,000
Foreclosed assets		1,670,000
Deferred tax asset, net		24,091,000
Goodwill		125,899,000
Other intangible assets		12,951,000
Accrued interest receivable and other assets		14,101,000
Total assets		1,929,802,000
Deposits		1,514,600,000
Short-term borrowings		72,879,000
Long-term debt		22,731,000
Accrued interest payable and other liabilities		11,355,000
Total liabilities		1,621,565,000
Net assets acquired		308,237,000
Preferred stock		28,405,000
Common stock warrants		717,000
Total other equity interests		29,122,000
Purchase price		279,115,000
As Reported by Yadkin at July 4, 2014 | Yadkin Financial Corporation
Business Acquisition [Line Items]
Cash and cash equivalents		36,116,000
Investment securities available for sale		259,143,000
Loans held for sale		15,696,000
Loans, net		1,403,419,000
Federal Home Loan Bank stock, at cost		3,778,000
Premises and equipment		40,204,000
Bank-owned life insurance		27,306,000
Foreclosed assets		2,271,000
Deferred tax asset, net		16,955,000
Goodwill		0
Other intangible assets		1,665,000
Accrued interest receivable and other assets		16,330,000
Total assets		1,822,883,000
Deposits		1,509,581,000
Short-term borrowings		72,879,000
Long-term debt		38,217,000
Accrued interest payable and other liabilities		8,448,000
Total liabilities		1,629,125,000
Net assets acquired		193,758,000
Preferred stock		28,405,000
Common stock warrants		1,850,000
Total other equity interests		30,255,000
Initial Fair Value Adjustments | Yadkin Financial Corporation
Business Acquisition [Line Items]
Cash and cash equivalents		0
Investment securities available for sale	[1]	(1,488,000)
Loans held for sale		0
Loans, net	[2]	(30,740,000)
Federal Home Loan Bank stock, at cost		0
Premises and equipment	[3]	(2,344,000)
Bank-owned life insurance		0
Foreclosed assets	[4]	(601,000)
Deferred tax asset, net	[5]	5,939,000
Goodwill	[6]	124,172,000
Other intangible assets	[7]	10,965,000
Accrued interest receivable and other assets	[8]	(2,229,000)
Total assets		103,674,000
Deposits	[9]	5,019,000
Short-term borrowings		0
Long-term debt	[10]	(15,486,000)
Accrued interest payable and other liabilities	[11]	(338,000)
Total liabilities		(10,805,000)
Net assets acquired		114,479,000
Preferred stock	[12]	0
Common stock warrants	[13]	(1,133,000)
Total other equity interests		(1,133,000)
Allowance loan losses		16,400,000
Fair value discount		$ 47,200,000
Preferred stock, dividend rate (as a percentage)		9.00%
Initial Fair Value Adjustments | Yadkin Financial Corporation | Common Stock Warrants
Business Acquisition [Line Items]
Number of warrants outstanding (in shares)			91,178
Volatility (as a percent)			48.60%
Expected dividends			$ 0
Risk free interest rate (as a percent)			1.74%
Exercise price (in dollars per share)			$ 21.9
Measurement Period Adjustments | Yadkin Financial Corporation
Business Acquisition [Line Items]
Cash and cash equivalents		$ 0
Investment securities available for sale		0
Loans held for sale		0
Loans, net		0
Federal Home Loan Bank stock, at cost		0
Premises and equipment		0
Bank-owned life insurance		0
Foreclosed assets		0
Deferred tax asset, net		1,197,000
Goodwill	[14]	1,727,000
Other intangible assets	[15]	321,000
Accrued interest receivable and other assets	[16]	0
Total assets		3,245,000
Deposits		0
Short-term borrowings		0
Long-term debt		0
Accrued interest payable and other liabilities	[17]	3,245,000
Total liabilities		3,245,000
Net assets acquired		0
Preferred stock		0
Common stock warrants		0
Total other equity interests		$ 0

[1] Adjustment reflects opening fair value of securities portfolio, which was established as the new book basis of the portfolio.

[2] Adjustment reflects the elimination of Yadkin's historical allowance for loan losses of $16.4 million and the recording of a fair value discount of $47.2 million on the loan portfolio. The fair value discount was calculated by forecasting cash flows over the expected remaining life of each loan and discounting those cash flows to present value using current market rates for similar loans. Forecasted cash flows include an estimate of lifetime credit losses on the loan portfolio.

[3] Adjustment reflects fair value adjustments on certain acquired branch offices as well as certain software and computer equipment.

[4] Adjustment reflects the write down of certain foreclosed assets based on current estimates of property values given current market conditions and additional discounts based on the Company's planned disposition strategy.

[5] Adjustment reflects the tax impact of acquisition accounting fair value adjustments.

[6] Goodwill represents the excess of the purchase price over the fair value of acquired net assets.

[7] Adjustment reflects the estimated fair value of the acquired core deposit intangible.

[8] Adjustment reflects the impact of fair value adjustments on other assets, which include mortgage servicing assets, certain unusable prepaid expenses, and the elimination of accrued interest on purchased credit-impaired loans.

[9] Adjustment reflects the fair value premium on time deposits, which was calculated by discounting future contractual interest payments at a current market interest rate.

[10] Adjustments reflect the fair value adjustments for subordinated debt issued to fund trust preferred securities and long-term Federal Home Loan Bank ("FHLB") advances, which were calculated by discounting future contractual interest payments at a current market interest rate for similar instruments. For FHLB advances, the fair value adjustment is consistent with the prepayment penalty the FHLB would charge to terminate the advance.

[11] Adjustments reflect accruals and fair value adjustments for other liabilities, which include the write-off of unearned income, deferred gains, and accrued liabilities that will not be paid.

[12] No fair value adjustments were made to Yadkin's outstanding preferred stock. The current preferred dividend rate of 9.0 percent approximates the current market yield for issuances of similar perpetual preferred stock. The preferred stock is currently redeemable at the liquidation value, and the Company expects the remaining life of this preferred stock to be relatively short.

[13] The fair value of the common stock warrants was estimated using a Black-Scholes option pricing model assuming all 91,178 warrants will remain outstanding through expiration on July 24, 2019. Assumptions and inputs used in the option pricing model included stock price volatility of 48.6 percent, no dividends, a risk free interest rate of 1.74 percent, and an exercise price of $21.90 per common warrant.

[14] Amount reflects adjustments to goodwill resulting from adjustments (o), (p) and (q).

[15] Amount reflects an adjustment to estimated fair value of the acquired core deposit intangible.

[16] Amount reflects adjustments to acquired deferred tax assets and the tax impact of adjustments (o) and (q).

[17] Amount reflects the adjustment of change in control obligations existing under various employment agreements that were triggered by the 2014 Mergers, an increase in reserves for unfunded letters of credit, and additional accruals for certain legal matters and other liabilities.