Seacoast Banking Corporation of Florida (SBCF) 10-Q 8 Nov 17 2017 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information	9 Months Ended
	Sep. 30, 2017shares
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3
Entity Registrant Name	SEACOAST BANKING CORP OF FLORIDA
Entity Central Index Key	730,708
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Trading Symbol	SBCF
Entity Common Stock, Shares Outstanding	43,512,179

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands		Sep. 30, 2017	Dec. 31, 2016
ASSETS
Cash and due from banks		$ 114,621	$ 82,520
Interest bearing deposits with other banks		10,657	27,124
Total cash and cash equivalents		125,278	109,644
Time deposits with other banks		14,591	0
Securities:
Available for sale (at fair value)		996,799	950,503
Held to maturity (fair value: $374,961 at September 30, 2017, and $369,881 at December 31, 2016)		374,773	372,498
Total Securities		1,371,572	1,323,001
Loans held for sale (at fair value)		29,447	15,332
Loans	[1]	3,384,991	2,879,536
Less: Allowance for loan losses		(26,232)	(23,400)
NET LOANS		3,358,759	2,856,136
Bank premises and equipment, net		57,092	58,684
Other real estate owned		7,142	9,949
Goodwill		101,747	64,649
Other intangible assets, net		16,102	14,572
Bank owned life insurance		118,762	84,580
Net deferred income taxes		43,951	60,818
Other assets		95,856	83,567
TOTAL ASSETS		5,340,299	4,680,932
LIABILITIES
Deposits		4,112,600	3,523,245
Federal funds purchased and securities sold under agreements to repurchase, maturing within 30 days		142,153	204,202
Federal Home Loan Bank (FHLB) borrowings		389,000	415,000
Subordinated debt		70,451	70,241
Other liabilities		31,654	32,847
TOTAL LIABILITIES		4,745,858	4,245,535
SHAREHOLDERS' EQUITY
Common stock, par value $0.10 per share, authorized 60,000,000 shares, issued 43,601,722 and outstanding 43,512,179 shares at September 30, 2017 and issued 38,090,568 and outstanding 38,021,835 shares at December 31, 2016		4,351	3,802
Other shareholders' equity		590,090	431,595
TOTAL SHAREHOLDERS' EQUITY		594,441	435,397
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY		$ 5,340,299	$ 4,680,932
[1]	Net loan balances as of September 30, 2017 and December 31, 2016 include deferred costs of $12.1 million and $10.6 million respectively.

CONDENSED CONSOLIDATED BALANCE3

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Held for Investment, Fair Value, Total	$ 374,961	$ 369,881
Common stock, par value	$ 0.10	$ 0.10
Common stock, shares authorized	60,000,000	60,000,000
Common stock, shares issued	43,601,722	38,090,568
Common stock, shares outstanding	43,512,179	38,021,835

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Interest and fees on loans	$ 40,403	$ 31,932	$ 110,503	$ 87,210
Interest and dividends on securities	9,012	7,253	25,971	20,002
Interest on interest bearing deposits and other investments	664	429	1,778	1,152
TOTAL INTEREST INCOME	50,079	39,614	138,252	108,364
Interest on deposits	2,196	1,292	5,054	3,447
Interest on borrowed money	2,134	874	5,128	2,754
TOTAL INTEREST EXPENSE	4,330	2,166	10,182	6,201
NET INTEREST INCOME	45,749	37,448	128,070	102,163
Provision for loan losses	680	550	3,385	1,411
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	45,069	36,898	124,685	100,752
Noninterest income
Other income	11,481	9,764	31,853	27,505
Securities gains (losses), net (includes net (losses) of $(2) and $(648) in other comprehensive income reclassifications for the three months ended September 30, 2017 and 2016, respectively, and net (losses) of $(25) and $(620) for the nine months ended September 30, 2017 and 2016, respectively)	(47)	225	(26)	361
TOTAL NONINTEREST INCOME	11,434	9,989	31,827	27,866
TOTAL NONINTEREST EXPENSES	34,361	33,435	110,732	100,584
INCOME BEFORE INCOME TAXES	22,142	13,452	45,780	28,034
Provision for income taxes (includes $(1) and $(250) in income tax benefit from reclassification items for the three months ended September 30, 2017 and 2016, respectively, and $(10) and $(239) in income tax benefit for the nine months ended September 30, 2017 and 2016, respectively).	7,926	4,319	15,962	9,603
NET INCOME	$ 14,216	$ 9,133	$ 29,818	$ 18,431
PER SHARE COMMON STOCK:
Net income diluted (in dollars per share)	$ 0.32	$ 0.24	$ 0.7	$ 0.49
Net income basic (in dollars per share)	0.33	0.24	0.72	0.5
Cash dividends declared (in dollars per share)	$ 0	$ 0	$ 0	$ 0
Average shares outstanding - diluted (in shares)	43,792,108	38,169,863	42,298,136	37,258,133
Average shares outstanding - basic (in shares)	43,151,248	37,549,804	41,626,356	36,626,290

CONDENSED CONSOLIDATED STATEME5

CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Reclassification adjustment for securities gains (losses) included in net losses	$ (2)	$ (648)	$ (25)	$ (620)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	$ (1)	$ (250)	$ (10)	$ (239)

CONDENSED CONSOLIDATED STATEME6

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
NET INCOME	$ 14,216	$ 9,133	$ 29,818	$ 18,431
Other comprehensive income:
Unrealized gains (losses) on securities available for sale	1,149	(391)	9,920	16,347
Amortization of unrealized losses on securities transferred to held to maturity, net	122	122	365	365
Reclassification adjustment for losses (gains) included in net income	47	(225)	26	(361)
Income tax effect on other comprehensive income	(503)	195	(3,964)	(6,307)
COMPREHENSIVE INCOME	$ 15,031	$ 8,834	$ 36,165	$ 28,475

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 29,818	$ 18,431
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	3,961	3,774
Amortization of premiums and discounts on securities, net	2,864	6,381
Other amortization and accretion, net	(346)	(1,862)
Stock based compensation	3,787	3,275
Origination of loans designated for sale	(164,878)	(132,482)
Sale of loans designated for sale	161,587	140,998
Provision for loan losses	3,385	1,411
Deferred income taxes	15,077	9,107
Losses (gains) on sale of securities	26	(361)
Gain on sale of loans	(5,160)	(4,661)
Losses (gains) on sale and write-downs of other real estate owned	(657)	22
Losses on disposition of fixed assets	1,973	2,440
Changes in operating assets and liabilities, net of effects from acquired companies:
Net increase in other assets	(419)	(7,557)
Net increase (decrease) in other liabilities	(2,575)	3,494
Net cash provided by operating activities	48,443	42,410
CASH FLOWS FROM INVESTING ACTIVITIES
Maturity and paydowns on securities available for sale	176,978	94,135
Maturity and paydowns on securities held for investment	64,984	29,582
Proceeds from sale of securities available for sale	7,525	39,047
Purchases of securities available for sale	(223,805)	(159,576)
Purchases of securities held for investment	(67,563)	(218,654)
Maturity of time deposits with other banks	2,682	0
Net new loans and principal repayments	(277,142)	(253,221)
Proceeds from the sale of portfolio loans	74,211	33,593
Purchases of loans held for investment	(55,352)	(61,584)
Proceeds from the sale of other real estate owned	5,123	4,987
Proceeds from sale of Federal Home Loan Bank (FHLB) and Federal Reserve Bank stock	29,984	1,700
Purchase of FHLB and Federal Reserve Stock	(32,398)	(16,213)
Purchase of VISA Class B stock	(6,180)	0
Purchases of bank owned life insurance	(30,000)	0
Net cash from bank acquisition	30,225	235,546
Additions to bank premises and equipment	(4,247)	(5,100)
Net cash used in investing activities	(304,975)	(275,758)
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase in deposits	304,005	14,568
Net decrease in federal funds purchased and repurchase agreements	(62,049)	(4,312)
Net increase (decrease) in FHLB borrowings, maturing in 30 days or less	(26,000)	305,000
Early redemption of FHLB borrowings	0	(50,000)
Stock based employee benefit plans	569	(592)
Issuance of common stock, net of related expense	55,641	0
Dividends paid	0	0
Net cash provided by financing activities	272,166	264,664
Net increase in cash and cash equivalents	15,634	31,316
Cash and cash equivalents at beginning of period	109,644	136,067
Cash and cash equivalents at end of period	125,278	167,383
Supplemental disclosure of non cash investing activities:
Transfer from loans to other real estate owned	448	2,996
Transfer from bank premises to other real estate owned	1,212	7,708
Transfers from loans held for investment to loans held for sale	$ 5,664	$ 0

BASIS OF PRESENTATION

BASIS OF PRESENTATION	9 Months Ended
	Sep. 30, 2017
Accounting Policies [Abstract]
BASIS OF PRESENTATION	NOTE A — BASIS OF PRESENTATION The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the nine-month period ended September 30 2017, are not necessarily indicative of the results that may be expected for the year ending December 31, 2017 or any other period. For further information, refer to the consolidated financial statements and footnotes thereto included in the Company’s annual report on Form 10-K for the year ended December 31, 2016. Use of Estimates The preparation of these condensed consolidated financial statements required the use of certain estimates by management in determining the Company’s assets, liabilities, revenues and expenses. Actual results could differ from those estimates. Specific areas, among others, requiring the application of management’s estimates include determination of the allowance for loan losses, the valuation of investment securities available for sale, fair value of impaired loans, contingent liabilities, fair value of other real estate owned, and the valuation of deferred tax assets. Actual results could differ from those estimates.

RECENTLY ISSUED ACCOUNTING STAN

RECENTLY ISSUED ACCOUNTING STANDARDS, Not adopted as of September 30, 2017	9 Months Ended
	Sep. 30, 2017
Accounting Changes and Error Corrections [Abstract]
RECENTLY ISSUED ACCOUNTING STANDARDS	NOTE B — RECENTLY ISSUED ACCOUNTING STANDARDS, Not adopted as of September 30, 2017 The following provides a brief description of accounting standards that have been issued but are not yet adopted that could affect the Company's financial statements: In May 2017, the Financial Account Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2017-09, clarifying when changes to the terms of share-based awards, such as value, vesting conditions or classification of the awards, should be accounted for as modifications. All the disclosures about modifications that are currently required would need to be made, along with disclosure of any change (or no change) in compensation expense. This guidance is effective for annual and interim periods beginning after December 15, 2017. Early adoption is permitted. Adoption of this standard is being evaluated as to its effect on the Company’s operating results and financial condition. In March 2017, the FASB issued ASU 2017-08, requiring entities to amortize premiums on certain purchased callable debt securities to their earliest call date. The accounting for purchased callable debt securities held at a discount did not change. Amortizing the premium to the earliest call date generally aligns interest income recognition with the economics of instruments. This guidance requires a modified retrospective transition under which a cumulative adjustment will be made to retained earnings as of the beginning of the first reporting period in which the guidance is adopted. This guidance is effective for fiscal years beginning after December 15, 2018. Adoption of this standard is being evaluated as to its effect on the Company’s operating results or financial condition. In January 2017, the FASB issued ASU 2017-04, eliminating Step 2 from the goodwill impairment test. Under the amendments to the guidance, an entity should perform its goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value. The loss recognized, however, should not exceed the total amount of goodwill allocated to that reporting unit. Additionally, an entity should consider income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit when measuring the goodwill impairment loss, if applicable. The guidance is effective for annual periods or any interim goodwill impairment tests beginning after December 15, 2019 using a prospective transition method. Early adoption is permitted. Adoption of this standard is being evaluated as to its effect on the Company’s operating results or financial condition. In August and November 2016, the FASB issued final guidance via ASU 2016-15 and ASU 2016-18, which address classification of certain cash receipts and cash payments, including changes in restricted cash, in the statement of cash flows. The guidance may change how an entity classifies certain cash receipts and cash payments on its statement of cash flows, the purpose being to reduce diversity in practice. The Company is evaluating the impact of ASU 2016-15 and 2016-18 on the Company’s statement of cash flows which will generally be applied retrospectively for fiscal years beginning after December 15, 2017. In June 2016, the FASB issued ASU 2016-13 for “Measurement of Credit Losses on Financial Instruments” to replace the incurred loss impairment methodology with a current expected credit loss methodology for financial instruments measured at amortized cost and other commitments to extend credit. Expected credit losses reflect losses over the remaining contractual life of an asset, considering the effect of voluntary prepayments and considering available information about the collectability of cash flows, including information about past events, current conditions, and supportable forecasts. The resultant allowance for credit losses reflects the portion of the amortized cost basis that the entity does not expect to collect. Additional quantitative and qualitative disclosures are required upon adoption. The Company has established a transition oversight committee that is responsible for assessing expected loss estimation models, data requirements, and changes in processes that will be necessary to meet the requirements of this new accounting guidance. Adoption is required January 1, 2020, with early adoption permitted on January 1, 2019. In March 2016, under ASU 2016-04, “Liabilities – Extinguishments of Liabilities, Breakage for Certain Prepaid Stored-Value Products” the FASB intends for entities to recognize liabilities for the sale of prepaid stored value products redeemable for goods, services, or cash. This guidance aligns recognition of breakage for these liabilities in a way consistent with how gift card breakage will be recognized. The Company does not expect adoption of this standard to affect the Company’s operating results or financial condition. Effective date for implementation of the guidance is for annual periods after December 15, 2018. In February 2016, the FASB amended existing guidance related to the recognition of lease assets and lease liabilities on the balance sheet and disclosures of key information about leasing arrangements, under ASU 2016-02. The guidance requires all parties to classify leases to determine how to recognize lease-related revenue and expense. The amendment requires lessees to put most leases on their balance sheet and record expenses to the income statement. Changes in the guidance eliminate real estate centric provisions for sale-leaseback transactions, including initial direct costs and lease execution costs for all entities. For lessors, the new FASB standard modifies classification criteria and accounting for sales type and direct financing leases. The Company is currently evaluating the impact of adopting the new guidance on its consolidated financial statements. The amended accounting guidance is applicable to periods after December 15, 2018 and interim periods within that year. In January 2016, the FASB issued ASU 2016-01 for “Recognition and Measurement of Financial Assets and Liabilities.” The ASU addresses certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. The update: a) requires equity investments (except those accounted for under the equity method of accounting) to be measured at fair value and recognized in net income, b) simplifies impairment assessments of equity investments without readily determinable fair values by requiring a qualitative assessment to identify impairment, and if impaired requires measurement of the investment at fair value, c) eliminates the requirement to disclose the methods and significant assumptions used to estimate the fair value, d) requires entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes, e) requires an entity to present separately in other comprehensive income the portion of the total change in fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments, f) requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset (that is, securities or loans and receivables) on the balance sheet or the accompanying notes to the financial statements, and g) clarifies that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available-for-sale securities in combination with the entity’s other deferred tax assets. The Company is evaluating the use of the measurement alternative available for equity securities without a readily determinable fair value, and the related impact to accounting policies, presentation, and disclosures. The ASU is effective for fiscal years beginning after December 15, 2017, and must be adopted on a modified retrospective basis, including interim periods within those fiscal years. In May 2014, the FASB issued ASU 2014-09, “Revenue Recognition – Revenue from Contracts with Customers.” The ASU is a converged standard between the FASB and the IASB that provides a single comprehensive revenue recognition model for all contracts with customers across transactions and industries. The primary objective of the ASU is revenue recognition that represents the transfer of control of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Revenue associated with loans and securities is not in the scope of the new guidance, and based on the Company’s evaluation to date we do not expect the adoption to have a significant impact on the Company’s operating results or financial condition. The Company continues to evaluate the changes in disclosures required by the new guidance. The Company plans to adopt the new guidance on January 1, 2018.

BASIC AND DILUTED EARNINGS PER

BASIC AND DILUTED EARNINGS PER COMMON SHARE	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
BASIC AND DILUTED EARNINGS PER COMMON SHARE	NOTE C — BASIC AND DILUTED EARNINGS PER COMMON SHARE 274,000 191,000 243,000 199,000 Three Months Ended Nine Months Ended September 30, September 30, (Dollars in thousands, except per share data) 2017 2016 2017 2016 Basic: Income available to common shareholders $ 14,216 $ 9,133 $ 29,818 $ 18,431 Average basic shares outstanding 43,151,248 37,549,804 41,626,356 36,626,290 Basic earnings per share $ 0.33 $ 0.24 $ 0.72 $ 0.50 Diluted: Income available to common shareholders $ 14,216 $ 9,133 $ 29,818 $ 18,431 Average basic shares outstanding 43,151,248 37,549,804 41,626,356 36,626,290 Restricted stock and stock options 640,860 620,059 671,780 631,843 Average diluted shares outstanding 43,792,108 38,169,863 42,298,136 37,258,133 Diluted earnings per share $ 0.32 $ 0.24 $ 0.70 $ 0.49 The dilutive impact of restricted stock and stock options is calculated under the treasury method.

SECURITIES

SECURITIES	9 Months Ended
	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
SECURITIES	NOTE D — SECURITIES September 30, 2017 Gross Gross Gross Amortized Unrealized Unrealized Fair (Dollars in thousands) Cost Gains Losses Value SECURITIES AVAILABLE FOR SALE U.S. Treasury securities and obligations of U.S. Government Sponsored Entities $ 9,830 $ 310 $ 0 $ 10,140 Mortgage backed securities of U.S. Government Sponsored Entities 284,015 1,245 (2,298) 282,962 Collateralized mortgage obligations of U.S. Government Sponsored Entities 232,278 525 (4,001) 228,802 Commercial mortgage backed securities of U.S. Government Sponsored Entities 22,274 355 (10) 22,619 Private mortgage backed securities 32,928 925 0 33,853 Private collateralized mortgage obligations 50,725 682 (302) 51,105 Collateralized loan obligations 207,341 794 (18) 208,117 Obligations of state and political subdivisions 59,495 1,065 (375) 60,185 Corporate and other debt securities 70,083 803 (89) 70,797 Private commercial mortgage backed securities 28,186 198 (165) 28,219 $ 997,155 $ 6,902 $ (7,258) $ 996,799 SECURITIES HELD TO MATURITY Mortgage backed securities of U.S. Government Sponsored Entities $ 179,437 $ 1,403 $ (996) $ 179,844 Collateralized mortgage obligations of U.S. Government Sponsored Entities 126,849 462 (1,506) 125,805 Commercial mortgage backed securities of U.S. Government Sponsored Entities 17,441 645 0 18,086 Collateralized loan obligations 45,438 228 0 45,666 Private collateralized mortgage obligations 5,608 8 (56) 5,560 $ 374,773 $ 2,746 $ (2,558) $ 374,961 December 31, 2016 Gross Gross Gross Amortized Unrealized Unrealized Fair (Dollars in thousands) Cost Gains Losses Value SECURITIES AVAILABLE FOR SALE U.S. Treasury securities and obligations of U.S. Government Sponsored Entities $ 12,073 $ 255 $ 0 $ 12,328 Mortgage backed securities of U.S. Government Sponsored Entities 287,726 585 (4,823) 283,488 Collateralized mortgage obligations of U.S. Government Sponsored Entities 238,805 314 (5,065) 234,054 Commercial mortgage backed securities of U.S. Government Sponsored Entities 22,351 222 (28) 22,545 Private mortgage backed securities 32,780 0 (791) 31,989 Private collateralized mortgage obligations 67,542 563 (816) 67,289 Collateralized loan obligations 124,716 838 (665) 124,889 Obligations of state and political subdivisions 63,161 622 (895) 62,888 Corporate and other debt securities 74,121 257 (517) 73,861 Private commercial mortgage backed securities 37,534 111 (473) 37,172 $ 960,809 $ 3,767 $ (14,073) $ 950,503 SECURITIES HELD TO MATURITY Mortgage backed securities of U.S. Government Sponsored Entities $ 159,941 $ 704 $ (1,243) $ 159,402 Collateralized mortgage obligations of U.S. Government Sponsored Entities 147,208 386 (2,630) 144,964 Commercial mortgage backed securities of U.S. Government Sponsored Entities 17,375 233 (74) 17,534 Collateralized loan obligations 41,547 430 (314) 41,663 Private collateralized mortgage obligations 6,427 0 (109) 6,318 $ 372,498 $ 1,753 $ (4,370) $ 369,881 Proceeds from sales of securities during the three month period ended September 30, 2017 were $ 3.7 15,000 62,000 7.5 36,000 62,000 26.8 301,000 76,000 39.0 448,000 87,000 In 2014, approximately $ 158.8 3.1 1.5 Securities at September 30, 2017 with a fair value of $ 178.3 142.2 Held to Maturity Available for Sale Amortized Fair Amortized Fair (Dollars in thousands) Cost Value Cost Value Due in less than one year $ 0 $ 0 $ 6,103 $ 6,108 Due after one year through five years 3,600 3,614 79,463 80,338 Due after five years through ten years 41,838 42,052 224,255 225,737 Due after ten years 0 0 26,525 26,635 45,438 45,666 336,346 338,818 Mortgage backed securities of U.S. Government Sponsored Entities 179,437 179,844 284,015 282,962 Collateralized mortgage obligations of U.S. Government Sponsored Entities 126,849 125,805 232,278 228,802 Commercial mortgage backed securities of U.S. Government Sponsored Entities 17,441 18,086 22,274 22,619 Private mortgage backed securities 0 0 32,928 33,853 Private collateralized mortgage obligations 5,608 5,560 50,725 51,105 Other debt securities 0 0 10,403 10,421 Private commercial mortgage backed securities 0 0 28,186 28,219 $ 374,773 $ 374,961 $ 997,155 $ 996,799 The estimated fair value of a security is determined based on market quotations when available or, if not available, by using quoted market prices for similar securities, pricing models or discounted cash flow analyses, using observable market data where available. September 30, 2017 Less than 12 months 12 months or longer Total Fair Unrealized Fair Unrealized Fair Unrealized (Dollars in thousands) Value Losses Value Losses Value Losses Mortgage backed securities of U.S. Government Sponsored Entities $ 152,796 $ (1,963) $ 109,433 $ (1,331) $ 262,229 $ (3,294) Collateralized mortgage obligations of U.S. Government Sponsored Entities 51,067 (365) 225,546 (5,142) 276,613 (5,507) Commercial mortgage-backed securities of U.S. Government Sponsored Entities 3,111 (10) 0 0 3,111 (10) Private mortgage backed securities 0 0 0 0 0 0 Private collateralized mortgage obligations 0 0 22,003 (358) 22,003 (358) Collateralized loan obligations 21,998 (18) 0 0 21,998 (18) Obligations of state and political subdivisions 11,556 (86) 5,639 (289) 17,195 (375) Corporate and other debt securities 998 0 8,301 (89) 9,299 (89) Private commercial mortgage backed securities 7,887 (95) 3,727 (70) 11,614 (165) Total temporarily impaired securities $ 249,413 $ (2,537) $ 374,649 $ (7,279) $ 624,062 $ (9,816) December 31, 2016 Less than 12 months 12 months or longer Total Fair Unrealized Fair Unrealized Fair Unrealized (Dollars in thousands) Value Losses Value Losses Value Losses Mortgage backed securities of U.S. Government Sponsored Entities $ 327,759 $ (5,991) $ 5,387 $ (75) $ 333,146 $ (6,066) Collateralized mortgage obligations of U.S. Government Sponsored Entities 234,175 (5,599) 58,912 (2,096) 293,087 (7,695) Commercial mortgage backed securities of U.S. Government Sponsored Entities 7,934 (102) 0 0 7,934 (102) Private mortgage backed securities 0 0 36,848 (900) 36,848 (900) Private collateralized mortgage obligations 1,460 0 38,417 (816) 39,877 (816) Collateralized loan obligations 8,152 (41) 51,694 (938) 59,846 (979) Obligations of state and political subdivisions 39,321 (895) 0 0 39,321 (895) Corporate and other debt securities 33,008 (517) 0 0 33,008 (517) Private commercial mortgage backed securities 12,667 (306) 7,139 (167) 19,806 (473) Total temporarily impaired securities $ 664,476 $ (13,451) $ 198,397 $ (4,992) $ 862,873 $ (18,443) The two tables above include securities held to maturity that were transferred from available for sale into held to maturity during 2014. Those securities had unrealized losses of $ 3.1 1.5 6.6 22.8 additional 0.1 0.4 additional 0.2 At September 30, 2017, unrealized losses on mortgage backed securities, collateralized mortgage obligations and commercial mortgage backed securities of U.S. government sponsored entities having a fair value of $ 542.0 8.8 At September 30, 2017, private label securities secured by seasoned residential collateral with a fair value of $ 22.0 0.4 At September 30, 2017, remaining securities categories had unrealized losses of $ 0.6 60.1 As of September 30, 2017, management does not intend to sell securities that are in unrealized loss positions and it is not more likely than not that the Company will be required to sell these securities before recovery of the amortized cost basis. Therefore, management does not consider any investment to be other-than-temporarily impaired at September 30, 2017. Included in other assets is $ 38.6 The Company also holds 211,330 1.6483 348,335 11,330 200,000 6.2

LOANS

LOANS	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
LOANS	NOTE E — LOANS September 30, 2017 Portfolio Loans PCI Loans PUL's Total (In thousands) Construction and land development $ 200,860 $ 116 $ 44,175 $ 245,151 Commercial real estate 1,146,359 8,975 322,758 1,478,092 Residential real estate 832,656 528 107,985 941,169 Commercial and financial 476,511 824 58,122 535,457 Consumer 180,467 0 4,018 184,485 Other loans 637 0 0 637 NET LOAN BALANCES (1) $ 2,837,490 $ 10,443 $ 537,058 $ 3,384,991 December 31, 2016 Portfolio Loans PCI Loans PUL's Total (In thousands) Construction and land development $ 137,480 $ 114 $ 22,522 $ 160,116 Commercial real estate 1,041,915 11,257 304,420 1,357,592 Residential real estate 784,290 684 51,813 836,787 Commercial and financial 308,731 941 60,917 370,589 Consumer 152,927 0 1,018 153,945 Other loans 507 0 0 507 NET LOAN BALANCES (1) $ 2,425,850 $ 12,996 $ 440,690 $ 2,879,536 (1) Net loan balances as of September 30, 2017 and December 31, 2016 include deferred costs of $ 12.1 10.6 Purchased Loans - PCI loans are accounted for pursuant to ASC Topic 310-30. The excess of cash flows expected to be collected over the estimated fair value is referred to as the accretable yield and is recognized in interest income over the remaining life of the loan in situations where there is a reasonable expectation about the timing and amount of cash flows expected to be collected. The difference between the contractually required payments and the cash flows expected to be collected, considering the impact of prepayments, is referred to as the nonaccretable difference. We have applied ASC Topic 310-20 accounting treatment to PULs. The table below summarizes the changes in accretable yield for PCI loans during the three and nine month periods ended September 30, 2017 and 2016, respectively: Reclassifications from nonaccretable September 30, June 30, 2017 Additions Deletions Accretion difference 2017 (In thousands) Accretable yield $ 3,265 0 0 (357) 407 $ 3,315 Recorded investment of acquired loans $ 13,132 $ 10,443 Allowance for loan losses 0 0 Recorded investment less allowance for loan losses $ 13,132 $ 10,443 Activity during the nine months ended September 30, 2017: Reclassifications from December 31, nonaccretable September 30, 2016 Additions Deletions Accretion difference 2017 (In thousands) Accretable yield $ 3,807 0 (10) (1,173) 691 $ 3,315 Recorded investment of acquired loans $ 12,996 $ 10,443 Allowance for loan losses 0 0 Recorded investment less allowance for loan losses $ 12,996 $ 10,443 Activity during the three months ended September 30, 2016: Reclassifications from nonaccretable September 30, June 30, 2016 Additions Deletions Accretion difference 2016 (In thousands) Accretable yield $ 4,674 0 0 (492) 0 $ 4,182 Recorded investment of acquired loans $ 13,652 $ 13,057 Allowance for loan losses 0 Recorded investment less allowance for loan losses $ 13,652 $ 13,057 Activity during the nine months ended September 30, 2016: Reclassifications from December 31, nonaccretable September 30, 2015 Additions Deletions Accretion difference 2016 (In thousands) Accretable yield $ 2,610 2,094 (15) (1,499) 992 $ 4,182 Recorded investment of acquired loans $ 12,109 $ 13,057 Allowance for loan losses 0 0 Recorded investment less allowance for loan losses $ 12,109 $ 13,057 Accruing Accruing Accruing Greater Total September 30, 2017 30-59 Days 60-89 Days Than Financing (In thousands) Past Due Past Due 90 Days Nonaccrual Current Receivables Portfolio Loans Construction and land development $ 273 $ 0 $ 0 $ 364 $ 200,223 $ 200,860 Commercial real estate 646 0 0 1,870 1,143,843 1,146,359 Residential real estate 1,013 107 0 8,341 823,195 832,656 Commercial and financial 1,699 0 0 193 474,619 476,511 Consumer 396 16 0 109 179,946 180,467 Other 0 0 0 0 637 637 Total 4,027 123 0 10,877 2,822,463 2,837,490 Purchased Unimpaired Loans Construction and land development 35 0 0 72 44,068 44,175 Commercial real estate 860 0 0 732 321,166 322,758 Residential real estate 152 113 0 1,163 106,557 107,985 Commercial and financial 321 0 0 332 57,469 58,122 Consumer 0 0 0 0 4,018 4,018 Other 0 0 0 0 0 0 Total 1,368 113 0 2,299 533,278 537,058 Purchased Credit Impaired Loans Construction and land development 0 0 0 0 116 116 Commercial real estate 0 0 0 1,199 7,776 8,975 Residential real estate 0 0 0 0 528 528 Commercial and financial 0 0 0 0 824 824 Consumer 0 0 0 0 0 0 Other 0 0 0 0 0 0 Total 0 0 0 1,199 9,244 10,443 Total Loans $ 5,395 $ 236 $ 0 $ 14,375 $ 3,364,985 $ 3,384,991 Accruing Accruing Accruing Greater Total December 31, 2016 30-59 Days 60-89 Days Than Financing (In thousands) Past Due Past Due 90 Days Nonaccrual Current Receivables Portfolio Loans Construction and land development 0 0 0 438 137,042 137,480 Commercial real estate 78 171 0 1,784 1,039,882 1,041,915 Residential real estate 1,570 261 0 8,582 773,877 784,290 Commercial and financial 30 0 0 49 308,652 308,731 Consumer 29 59 0 170 152,669 152,927 Other 0 0 0 0 507 507 Total 1,707 491 0 11,023 2,412,629 2,425,850 Purchased Unimpaired Loans Construction and land development 0 0 0 32 22,490 22,522 Commercial real estate 345 485 0 1,272 302,318 304,420 Residential real estate 153 0 0 1,262 50,398 51,813 Commercial and financial 39 328 0 197 60,353 60,917 Consumer 37 0 0 0 981 1,018 Other 0 0 0 0 0 0 Total 574 813 0 2,763 436,540 440,690 Purchased Impaired Loans Construction and land development 0 0 0 0 114 114 Commercial real estate 0 0 0 4,285 6,972 11,257 Residential real estate 0 185 0 0 499 684 Commercial and financial 0 0 0 0 941 941 Consumer 0 0 0 0 0 0 Other 0 0 0 0 0 0 Total 0 185 0 4,285 8,526 12,996 Total Loans $ 2,281 $ 1,489 $ 0 $ 18,071 $ 2,857,695 $ 2,879,536 The Company utilizes an internal asset classification system as a means of reporting problem and potential problem loans. Under the Company’s risk rating system, the Company classifies problem and potential problem loans as “Special Mention,” “Substandard,” and “Doubtful” and these loans are monitored on an ongoing basis. Loans that do not currently expose the Company to sufficient risk to warrant classification in the Substandard or Doubtful categories, but possess weaknesses that deserve management’s close attention are deemed to be Special Mention. Substandard loans include those characterized by the distinct possibility that the Company will sustain some loss if the deficiencies are not corrected. Loans classified as Substandard may require a specific allowance. Loans classified as Doubtful have all the weaknesses inherent in those classified Substandard with the added characteristic that the weaknesses present make collection or liquidation in full, on the basis of currently existing facts, conditions and values, highly questionable and improbable. The principal on loans classified as Doubtful is generally charged off. Risk ratings are updated any time the situation warrants. Loans that are not problem or potential problem loans are considered to be pass-rated loans and risk grades are recalculated at least annually by the loan relationship manager. The following tables present the risk category of loans by class of loans based on the most recent analysis performed as of September 30, 2017 and December 31, 2016: September 30, 2017 Construction Commercial & Land Commercial Residential and Consumer (In thousands) Development Real Estate Real Estate Financial Loans Total Pass $ 232,183 $ 1,442,538 $ 917,500 $ 527,190 $ 183,031 $ 3,302,442 Special mention 8,844 11,534 1,317 3,414 1,462 26,571 Substandard 3,439 14,466 2,966 4,328 223 25,422 Doubtful 0 0 0 0 0 0 Nonaccrual 436 3,801 9,504 525 109 14,375 Pass-Troubled debt restructures 33 4,876 0 0 0 4,909 Troubled debt restructures 216 877 9,882 0 297 11,272 $ 245,151 $ 1,478,092 $ 941,169 $ 535,457 $ 185,122 $ 3,384,991 December 31, 2016 Construction Commercial & Land Commercial Residential and Consumer (In thousands) Development Real Estate Real Estate Financial Loans Total Pass $ 148,563 $ 1,319,696 $ 811,576 $ 364,241 $ 153,730 $ 2,797,806 Special mention 5,037 17,184 1,780 3,949 67 28,017 Substandard 5,497 7,438 2,709 2,153 134 17,931 Doubtful 0 0 0 0 0 0 Nonaccrual 470 7,341 9,844 246 170 18,071 Pass-Troubled debt restructures 44 4,988 358 0 44 5,434 Troubled debt restructures 505 945 10,520 0 307 12,277 $ 160,116 $ 1,357,592 $ 836,787 $ 370,589 $ 154,452 $ 2,879,536

IMPAIRED LOANS AND ALLOWANCE FO

IMPAIRED LOANS AND ALLOWANCE FOR LOAN LOSSES	9 Months Ended
	Sep. 30, 2017
Loans and Leases Receivable Disclosure [Abstract]
Impaired Loans and Allowance for Loan Losses	NOTE F — IMPAIRED LOANS AND ALLOWANCE FOR LOAN LOSSES The Company’s Troubled Debt Restructuring (“TDR”) concessions granted generally do not include forgiveness of principal balances , but may include interest rate reductions, an extension of the amortization period and/or converting the loan to interest only for a limited period of time Pre- Post- Modification Modification Number Outstanding Outstanding Valuation of Recorded Recorded Allowance (Dollars in thousands) Contracts Investment Investment Recorded Construction and land development 1 $ 52 $ 46 $ 6 Residential real estate 1 15 15 0 2 $ 67 $ 61 $ 6 The following table presents loans that were modified during the nine months ended September 30, 2016: Pre- Post- Modification Modification Number Outstanding Outstanding Valuation of Recorded Recorded Allowance (Dollars in thousands) Contracts Investment Investment Recorded Residential real estate 6 $ 1,660 $ 1,489 $ 171 6 $ 1,660 $ 1,489 $ 171 During the nine months ended September 30, 2017 and 2016, there were no payment defaults on loans that had been modified in a TDR within the previous twelve months. The Company considers a loan to have defaulted when it becomes 90 days or more delinquent under the modified terms, has been transferred to nonaccrual status, or has been transferred to other real estate owned. A defaulted TDR is generally placed on nonaccrual and a specific allowance for loan loss is assigned in accordance with the Company’s policy. September 30, 2017 Unpaid Related Recorded Principal Valuation (Dollars in thousands) Investment Balance Allowance Impaired Loans with No Related Allowance Recorded: Construction and land development $ 397 $ 702 $ 0 Commercial real estate 3,431 4,811 0 Residential real estate 10,598 15,283 0 Commercial and financial 29 39 0 Consumer 117 191 0 Impaired Loans with an Allowance Recorded: Construction and land development 289 355 91 Commercial real estate 4,931 4,939 222 Residential real estate 8,773 8,970 1,188 Commercial and financial 1,127 501 521 Consumer 290 292 48 Total: Construction and land development 686 1,057 91 Commercial real estate 8,362 9,750 222 Residential real estate 19,371 24,253 1,188 Commercial and financial 1,156 540 521 Consumer 407 483 48 $ 29,982 $ 36,083 $ 2,070 December 31, 2016 Unpaid Related Recorded Principal Valuation (Dollars in thousands) Investment Balance Allowance Impaired Loans with No Related Allowance Recorded: Construction and land development $ 226 $ 321 $ 0 Commercial real estate 3,267 4,813 0 Residential real estate 9,706 14,136 0 Commercial and financial 199 206 0 Consumer 0 0 0 Impaired Loans with an Allowance Recorded: Construction and land development 51 51 0 Commercial real estate 6,937 6,949 395 Residential real estate 12,332 12,681 2,059 Commercial and financial 0 0 0 Consumer 0 0 0 Total: Construction and land development 277 372 0 Commercial real estate 10,204 11,762 395 Residential real estate 22,038 26,817 2,059 Commercial and financial 199 206 0 Consumer 0 0 0 $ 32,718 $ 39,157 $ 2,454 For the three months ended September 30, 2017 and 2016, the Company’s average recorded investments in impaired loans (excluding PCI loans) and related interest income were as follows: Three Months Ended Three Months Ended September 30, 2017 September 30, 2016 Average Interest Average Interest Recorded Income Recorded Income (Dollars in thousands) Investment Recognized Investment Recognized Impaired Loans with No Related Allowance Recorded: Construction & land development $ 517 $ 13 $ 208 $ 3 Commercial real estate 3,004 75 1,437 31 Residential real estate 10,266 150 9,346 138 Commercial and financial 244 1 16 0 Consumer 124 3 157 3 Impaired Loans with an Allowance Recorded: Construction & land development 333 2 609 7 Commercial real estate 4,953 56 6,565 64 Residential real estate 9,831 63 12,038 102 Commercial and financial 646 2 0 0 Consumer 333 3 383 4 Total: Construction & land development 850 15 817 10 Commercial real estate 7,957 131 8,002 95 Residential real estate 20,097 213 21,384 240 Commercial and financial 890 3 16 0 Consumer 457 6 540 7 $ 30,251 $ 368 $ 30,759 $ 352 Nine Months Ended Nine Months Ended September 30, 2017 September 30, 2016 Average Interest Average Interest Recorded Income Recorded Income (Dollars in thousands) Investment Recognized Investment Recognized Impaired Loans with No Related Allowance Recorded: Construction & land development $ 460 $ 35 $ 188 $ 11 Commercial real estate 2,833 154 1,854 97 Residential real estate 9,933 447 9,444 406 Commercial and financial 183 3 16 0 Consumer 111 10 193 10 Impaired Loans with an Allowance Recorded: Construction & land development 242 8 671 20 Commercial real estate 5,789 163 6,835 193 Residential real estate 11,029 260 12,098 322 Commercial and financial 378 14 0 0 Consumer 247 12 363 14 Total: Construction & land development 702 43 859 31 Commercial real estate 8,622 317 8,689 290 Residential real estate 20,962 707 21,542 728 Commercial and financial 561 17 16 0 Consumer 358 22 556 24 $ 31,205 $ 1,106 $ 31,662 $ 1,073 Impaired loans also include loans that have been modified in TDRs where concessions to borrowers who experienced financial difficulties have been granted. At September 30, 2017 and at December 31, 2016, accruing TDRs totaled $ 16.2 17.7 The impaired loans are measured for impairment based on the value of underlying collateral or the present value of expected future cash flows discounted at the loan’s effective rate. The valuation allowance is included in the allowance for loan losses. Interest payments received on impaired loans are recorded as interest income unless collection of the remaining recorded investment is doubtful at which time payments received are recorded as reductions to principal. For impaired loans whose impairment is measured based on the present value of expected future cash flows, a total of $ 169,000 282,000 83,000 176,000 Nonaccrual loans and accruing loans past due 90 days or more (excluding purchased loans) totaled $ 10.9 0 11.0 0 3.5 0 7.0 0 Allowance for Loan Losses for the Three Months Ended September 30, 2017 Provision TDR Beginning for Loan Charge- Valuation Ending (Dollars in thousands) Balance Losses Offs Recoveries Adjustments Balance Construction & land development $ 1,574 $ (690) $ 0 $ 728 $ 0 $ 1,612 Commercial real estate 9,923 62 (239) 175 (15) 9,906 Residential real estate 7,423 116 (296) 39 (148) 7,134 Commercial and financial 5,460 834 (333) 28 0 5,989 Consumer 1,620 358 (442) 61 (6) 1,591 $ 26,000 $ 680 $ (1,310) $ 1,031 $ (169) $ 26,232 Allowance for Loan Losses for the Nine Months Ended September 30, 2017 Provision TDR Beginning for Loan Charge- Valuation Ending (Dollars in thousands) Balance Losses Offs Recoveries Adjustments Balance Construction & land development $ 1,219 $ (496) $ 0 $ 891 $ (2) $ 1,612 Commercial real estate 9,273 410 (341) 613 (49) 9,906 Residential real estate 7,483 90 (482) 266 (223) 7,134 Commercial and financial 3,636 3,036 (837) 154 0 5,989 Consumer 1,789 345 (756) 221 (8) 1,591 $ 23,400 $ 3,385 $ (2,416) $ 2,145 $ (282) $ 26,232 Allowance for Loan Losses for the Three Months Ended September 30, 2016 Provision TDR Beginning for Loan Charge- Valuation Ending (Dollars in thousands) Balance Losses Offs Recoveries Adjustments Balance Construction & land development $ 1,160 $ 50 $ 0 $ 25 $ (2) $ 1,233 Commercial real estate 7,192 1,505 (78) 169 (55) 8,733 Residential real estate 8,299 (637) 0 272 (25) 7,909 Commercial and financial 2,591 (633) (200) 1,278 0 3,036 Consumer 1,483 265 (18) 44 (1) 1,773 $ 20,725 $ 550 $ (296) $ 1,788 $ (83) $ 22,684 Allowance for Loan Losses for the Nine Months Ended September 30, 2016 Provision TDR Beginning for Loan Charge- Valuation Ending (Dollars in thousands) Balance Losses Offs Recoveries Adjustments Balance Construction & land development $ 1,151 $ (125) $ 0 $ 214 $ (7) $ 1,233 Commercial real estate 6,756 2,025 (209) 271 (110) 8,733 Residential real estate 8,057 (626) (135) 669 (56) 7,909 Commercial and financial 2,042 (524) (255) 1,773 0 3,036 Consumer 1,122 661 (98) 91 (3) 1,773 $ 19,128 $ 1,411 $ (697) $ 3,018 $ (176) $ 22,684 At September 30, 2017 Individually Evaluated for Collectively Evaluated for Impairment Impairment Total Recorded Associated Recorded Associated Recorded Associated (Dollars in thousands) Investment Allowance Investment Allowance Investment Allowance Construction & land development $ 686 $ 91 $ 244,349 $ 1,521 $ 245,035 $ 1,612 Commercial real estate 8,362 222 1,460,755 9,684 1,469,117 9,906 Residential real estate 19,371 1,188 921,270 5,946 940,641 7,134 Commercial and financial 1,156 521 533,477 5,468 534,633 5,989 Consumer 407 48 184,715 1,543 185,122 1,591 $ 29,982 $ 2,070 $ 3,344,566 $ 24,162 $ 3,374,548 $ 26,232 At December 31, 2016 Individually Evaluated for Collectively Evaluated for Impairment Impairment Total Recorded Associated Recorded Associated Recorded Associated (Dollars in thousands) Investment Allowance Investment Allowance Investment Allowance Construction & land development $ 277 $ 0 $ 159,839 $ 1,219 $ 160,116 $ 1,219 Commercial real estate 10,204 395 1,335,832 8,878 1,346,036 9,273 Residential real estate 22,038 2,059 814,250 5,424 836,288 7,483 Commercial and financial 199 0 369,449 3,636 369,648 3,636 Consumer 0 0 154,452 1,789 154,452 1,789 $ 32,718 $ 2,454 $ 2,833,822 $ 20,946 $ 2,866,540 $ 23,400 Loans collectively evaluated for impairment included loans acquired in connection with the acquisition of GulfShore Bancshares, Inc. (“GulfShore”) on April 7, 2017, Floridian Financial Group, Inc. (“Floridian”) on March 11, 2016, certain branches from BMO Harris Bank N.A. (“BMO”) on June 3, 2016, Grand Bankshares Inc., (“Grand”) on July 17, 2015, and BANKshares, Inc. on October 1, 2014, that are not PCI loans. At September 30, 2017, the remaining fair value adjustments for loans acquired was approximately $ 15.6 2.77 13.7 3.11 PCI Loans Individually Evaluated for Impairment September 30, 2017 December 31, 2016 Recorded Associated Recorded Associated (Dollars in thousands) Investment Allowance Investment Allowance Construction & land development $ 116 $ 0 $ 114 $ 0 Commercial real estate 8,975 0 11,257 0 Residential real estate 528 0 684 0 Commercial and financial 824 0 941 0 Consumer 0 0 0 0 $ 10,443 $ 0 $ 12,996 $ 0

SECURITIES SOLD UNDER AGREEMENT

SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE	9 Months Ended
	Sep. 30, 2017
Brokers and Dealers [Abstract]
SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE	NOTE G — SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE Securities sold under agreements to repurchase are accounted for as secured borrowings. For securities sold under agreements to repurchase, the Company is obligated to provide additional collateral in the event of a significant decline in fair value of collateral pledged. At September 30, 2017 and December 31, 2016, the fair value of Company securities pledged under agreements to repurchase were as follows by collateral type and maturity: Overnight and Continuous Maturity September 30, December 31, (Dollars in thousands) 2017 2016 Mortgage backed securities and collateralized mortgage obligations of U.S. Government Sponsored Entities $ 142,153 $ 204,202

NONINTEREST INCOME AND EXPENSES

NONINTEREST INCOME AND EXPENSES	9 Months Ended
	Sep. 30, 2017
Noninterest Income and Expenses [Abstract]
NONINTEREST INCOME AND EXPENSE	NOTE H – NONINTEREST INCOME AND EXPENSES Three Months Ended Nine Months Ended September 30, September 30, (In thousands) 2017 2016 2017 2016 Noninterest income Service charges on deposits $ 2,626 $ 2,698 $ 7,483 $ 7,057 Trust income 967 820 2,764 2,464 Mortgage banking fees 2,138 1,885 4,962 4,248 Brokerage commissions and fees 351 463 1,079 1,564 Marine finance fees 137 138 597 558 Interchange income 2,582 2,306 7,747 6,893 Other deposit-based EFT fees 100 109 354 352 BOLI income 836 382 2,326 1,602 Other income 1,744 963 4,541 2,767 11,481 9,764 31,853 27,505 Securities gains (losses), net (47) 225 (26) 361 TOTAL $ 11,434 $ 9,989 $ 31,827 $ 27,866 Noninterest expense Salaries and wages $ 15,627 $ 14,337 $ 49,371 $ 41,620 Employee benefits 2,917 2,425 8,920 7,428 Outsourced data processing costs 3,231 3,198 9,956 10,440 Telephone/data lines 573 539 1,753 1,606 Occupancy 2,447 3,675 10,025 10,292 Furniture and equipment 1,191 1,228 4,261 3,509 Marketing 1,298 780 3,294 2,786 Legal and professional fees 2,560 2,213 7,968 7,226 FDIC assessments 548 517 1,768 1,704 Amortization of intangibles 839 728 2,397 1,767 Asset disposition expense 117 219 306 469 Net loss (gain) on other real estate owned and repossessed assets (414) (96) (599) (348) Early redemption cost for Federal Home Loan Bank borrowings 0 0 0 1,777 Other 3,427 3,672 11,312 10,308 TOTAL $ 34,361 $ 33,435 $ 110,732 $ 100,584

EQUITY CAPITAL

EQUITY CAPITAL	9 Months Ended
	Sep. 30, 2017
Equity [Abstract]
EQUITY CAPITAL	NOTE I — EQUITY CAPITAL On February 21, 2017, the Company completed a public offering of 2,702,500 55.7 6,210,000 The Company is well capitalized and at September 30, 2017, the Company and the Company’s principal banking subsidiary, Seacoast National Bank, or “Seacoast Bank”, met the common equity Tier 1 capital ratio (CET1) regulatory threshold of 6.5

CONTINGENCIES

CONTINGENCIES	9 Months Ended
	Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
CONTINGENCIES	NOTE J — CONTINGENCIES The Company and its subsidiaries, because of the nature of their businesses, are at all times subject to legal actions, threatened or filed. Management presently believes that none of the legal proceedings to which it is a party are likely to have a material adverse effect on the Company’s consolidated financial condition, operating results or cash flows, although no assurance can be given with respect to the ultimate outcome of any such claim or litigation.

FAIR VALUE

FAIR VALUE	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
FAIR VALUE	NOTE K — FAIR VALUE Quoted Prices in Active Significant Markets for Other Significant Identical Observable Unobservable Fair Value Assets Inputs Inputs (Dollars in thousands) Measurements (Level 1) (Level 2) (Level 3) At September 30, 2017: Available for sale securities (1) $ 996,799 $ 100 $ 996,699 $ 0 Loans held for sale (2) 29,447 0 29,447 0 Loans (3) 4,160 0 2,973 1,187 Other real estate owned (4) 7,142 0 0 7,142 At December 31, 2016: Available for sale securities (1) $ 950,503 $ 100 $ 950,403 $ 0 Loans held for sale (2) 15,332 0 15,332 0 Loans (3) 4,120 0 3,170 950 Other real estate owned (4) 9,949 0 0 9,949 (1) See Note D for further detail of fair value of individual investment categories. (2) Recurring fair value basis determined using observable market data. (3) See Note F. Nonrecurring fair value adjustments to loans identified as impaired reflect full or partial write-downs that are based on the loan’s observable market price or current appraised value of the collateral in accordance with ASC 310. (4) Fair value is measured on a nonrecurring basis in accordance with ASC 360 . The fair value of impaired real estate loans which are collateral dependent is based on recent real estate appraisals less estimated costs of sale. For residential real estate impaired loans, appraised values or internal evaluation are based on the comparative sales approach. These impaired loans are considered level 2 in the fair value hierarchy. For commercial and commercial real estate impaired loans, evaluations may use either a single valuation approach or a combination of approaches, such as comparative sales, cost and/or income approach. A significant unobservable input in the income approach is the estimated capitalization rate for a given piece of collateral. At September 30, 2017, the capitalization rates utilized to determine fair value of the underlying collateral averaged approximately 7.7 4.2 1.4 million at September 30, 2017, compared to $ 4.1 0.4 Fair value of available for sale securities is determined using valuation techniques for individual investments as described in Note D. When appraisals are used to determine fair value and the appraisals are based on a market approach, the fair value of other real estate owned (“OREO”) is classified as a level 2 input. When the fair value of OREO is based on appraisals which require significant adjustments to market-based valuation inputs or apply an income approach based on unobservable cash flows, the fair value of OREO is classified as Level 3. Transfers between levels of the fair value hierarchy are recognized on the actual date of the event or circumstances that caused the transfer, which generally coincides with the Company’s monthly and/or quarter-end valuation process. During the nine months ended September 30, 2017 and 2016, there were no transfers between levels of the fair value hierarchy. For loans classified as level 3, additions totaled $ 0.8 0.6 Charge-offs recognized upon loan foreclosures are generally offset by general or specific allocations of the allowance for loan losses and generally do not, and did not during the reported periods, significantly impact the Company’s provision for loan losses. For OREO classified as level 3 during the first nine months of 2017, foreclosed loans added $ 0.4 1.2 4.4 4.2 Quoted Prices in Active Significant Markets for Other Significant Identical Observable Unobservable Carrying Assets Inputs Inputs (Dollars in thousands) Amount (Level 1) (Level 2) (Level 3) At September 30, 2017: Financial Assets Securities held to maturity (1) $ 374,773 $ 0 $ 374,961 $ 0 Time deposits with other banks 14,591 0 0 14,557 Loans, net 3,345,978 0 0 3,328,023 Financial Liabilities Deposit liabilities 4,112,600 0 0 4,110,324 Subordinated debt 70,451 0 55,072 0 At December 31, 2016: Financial Assets Securities held to maturity (1) $ 372,498 $ 0 $ 369,881 $ 0 Loans, net 2,852,016 0 0 2,840,993 Financial Liabilities Deposit liabilities 3,523,245 0 0 3,523,322 Subordinated debt 70,241 0 54,908 0 (1) See Note D for further detail of fair value of individual investment categories. The short maturity of Seacoast’s assets and liabilities results in having a significant number of financial instruments whose fair value equals or closely approximates carrying value. Such financial instruments are reported in the following balance sheet captions: cash and due from banks, interest bearing deposits with other banks, federal funds purchased, and securities sold under agreement to repurchase, maturing within 30 days, and FHLB borrowings. The following methods and assumptions were used to estimate the fair value of each class of financial instrument for which it is practicable to estimate that value at September 30, 2017 and December 31, 2016: Securities : U.S. Treasury securities are reported at fair value utilizing Level 1 inputs. Other securities are reported at fair value utilizing Level 2 inputs. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury yield curve, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the bond’s terms and conditions, among other factors. The Company reviews the prices supplied by independent pricing services, as well as their underlying pricing methodologies, for reasonableness and to ensure such prices are aligned with traditional pricing matrices. The fair value of collateralized loan obligations is determined from broker quotes. From time to time, the Company will validate, on a sample basis, prices supplied by the independent pricing service by comparison to prices obtained from other brokers and third-party sources or derived using internal models. Loans : Fair values are estimated for portfolios of loans with similar financial characteristics. Loans are segregated by type such as commercial or mortgage. Each loan category is further segmented into fixed and adjustable rate interest terms and by performing and nonperforming categories. The fair value of loans, except residential mortgages, is calculated by discounting scheduled cash flows through the estimated maturity using estimated market discount rates that reflect the credit and interest rate risks inherent in the loan. For residential mortgage loans, fair value is estimated by discounting contractual cash flows adjusting for prepayment assumptions using discount rates based on secondary market sources. The estimated fair value is not an exit price fair value under ASC 820 when this valuation technique is used. Loans held for sale : Fair values are based upon estimated values received from independent third party purchasers. These loans are intended for sale and the Company believes that the fair value is the best indicator of the resolution of these loans. Interest income is recorded based on the contractual terms of the loan and in accordance with the Company’s policy on loans held for investment. None of the loans are 90 days or more past due or on nonaccrual as of September 30, 2017 and December 31, 2016, respectively. September 30, December 31, (Dollars in thousands) 2017 2016 Aggregate fair value $ 29,447 $ 15,332 Contractual balance 28,782 14,904 Gains 665 428 Deposit Liabilities : The fair value of demand deposits, savings accounts and money market deposits is the amount payable at the reporting date. The fair value of fixed maturity certificates of deposit is estimated using the rates currently offered for funding of similar remaining maturities.

BUSINESS COMBINATIONS

BUSINESS COMBINATIONS	9 Months Ended
	Sep. 30, 2017
Business Combinations [Abstract]
Business Combinations	NOTE L — BUSINESS COMBINATIONS Acquisition of Floridian Financial Group, Inc. On March 11, 2016, the Company completed its acquisition of Floridian. Simultaneously, upon completion of the merger, Floridian’s wholly owned subsidiary bank, Floridian Bank, was merged with and into Seacoast Bank. Floridian, headquartered in Lake Mary, Florida, operated 10 branches in Orlando and Daytona Beach, of which several were consolidated with Seacoast locations. This acquisition added approximately $ 417 337 266 The Company acquired 100 Under the terms of the definitive agreement, Floridian shareholders received, at their election, (i) the combination of $4.29 in cash and 0.5291 shares of Seacoast common stock, (ii) $12.25 in cash, or (iii) 0.8140 shares of Seacoast common stock, subject to a customary proration mechanism so that the aggregate consideration mix equaled 35% cash and 65% Seacoast shares (based on Seacoast’s closing price of $15.47 per share on March 11, 2016). March 11, 2016 Shares exchanged for cash $ 26,699,000 Number of Floridian Financial Group, Inc. common shares outstanding 6,222,119 Per share exchange ratio 0.5289 Number of shares of Seacoast common stock issued 3,291,066 Multiplied by common stock price per share on March 11, 2016 $ 15.47 Value of common stock issued 50,912,791 Total purchase price $ 77,611,791 Business Combinations Measurement Initial Report Period As Adjusted Date of acquisition March 11, 2016 Adjustments March 11, 2016 (in thousands) Assets: Cash $ 28,243 $ 0 $ 28,243 Investment securities 66,912 95 67,007 Loans, net 268,249 (2,112) 266,137 Fixed assets 7,801 (628) 7,173 Core deposit intangibles 3,375 0 3,375 Goodwill 29,985 1,647 31,632 Other assets 12,879 998 13,877 $ 417,444 $ 0 $ 417,444 Liabilities: Deposits $ 337,341 $ 0 $ 337,341 Other liabilities 2,492 0 2,492 $ 339,833 $ 0 $ 339,833 The table below presents information with respect to the fair value of acquired loans, as well as their unpaid principal balance (“Book Balance”) at acquisition date. March 11, 2016 (In thousands) Book Balance Fair Value Loans: Single family residential real estate $ 38,304 $ 37,367 Commercial real estate 172,531 167,105 Construction/development/land 20,546 18,108 Commercial loans 39,070 37,804 Consumer and other loans 3,385 3,110 Purchased credit-impaired 6,186 2,643 Total acquired loans $ 280,022 $ 266,137 For the loans acquired we first segregated all acquired loans with specifically identified credit deficiency factor(s). The factors we considered to identify loans as PCI loans were all acquired loans that were nonaccrual, 60 days or more past due, designated as TDRs, graded “special mention” or “substandard.” These loans were then evaluated to determine estimated fair values as of the acquisition date. As required by generally accepted accounting principles, we are accounting for these loans pursuant to ASC Topic 310-30. The table below summarizes the total contractually required principal and interest cash payments, management’s estimate of expected total cash payments and fair value of the loans as of March 11, 2016 for PCI loans. (In thousands) March 11, 2016 Contractually required principal and interest $ 8,031 Non-accretable difference (4,820) Cash flows expected to be collected 3,211 Accretable yield (568) Total purchased credit-impaired loan acquired $ 2,643 Loans without specifically identified credit deficiency factors are referred to as Purchased Unimpaired Loans (“PULs”) for disclosure purposes. These loans were then evaluated to determine estimated fair values as of the acquisition date. Although no specific credit deficiencies were identifiable, we believe there is an element of risk as to whether all contractual cash flows will be eventually received. Factors that were considered included the economic environment both nationally and locally as well as the real estate market particularly in Florida. We have applied ASC Topic 310-20 accounting treatment to the PULs. The Company believes the deposits assumed from the acquisition have an intangible value. The Company applied ASC Topic 805, which prescribes the accounting for goodwill and other intangible assets such as core deposit intangibles, in a business combination. In determining the valuation amount, deposits were analyzed based on factors such as type of deposit, deposit retention, interest rates and age of deposit relationships. The acquisition of Floridian constitutes a business combination. Accordingly, the assets acquired and liabilities assumed are presented at their fair values. The determination of fair value required management to make estimates about discount rates, future expected cash flows, market conditions and other future events that are highly subjective in nature and subject to change, and in some instances rely on use of third party experts. Acquisition of BMO Harris Central Florida Offices, Deposits and Loans On June 3, 2016, Seacoast Bank assumed approximately $ 314 3.0 63 0.5 Business Combinations Measurement Initial Report Period As Adjusted Date of acquisition June 3, 2016 Adjustments June 3, 2016 (in thousands) Assets: Cash from BMO (net of payable) $ 234,094 $ 0 $ 234,094 Loans, net 62,671 0 62,671 Fixed assets 3,715 0 3,715 Core deposit intangibles 5,223 (135) 5,088 Goodwill 7,645 163 7,808 Other assets 952 (28) 924 $ 314,300 $ 0 $ 314,300 Liabilities: Deposits $ 314,248 $ 0 $ 314,248 Other liabilities 52 0 52 $ 314,300 $ 0 $ 314,300 The table below presents information with respect to the fair value of acquired loans, as well as their unpaid principal balance (“Book Balance”) at acquisition date. June 3, 2016 (In thousands) Book Balance Fair Value Loans: Commercial real estate $ 31,564 $ 31,200 Commercial loans 32,479 31,471 Purchased credit-impaired 0 0 Total acquired loans $ 64,043 $ 62,671 At June 3, 2016, no loans acquired from BMO were specifically identified with a credit deficiency factor(s). The factors we consider to identify loans as PCI loans are acquired loans that were nonaccrual, 60 days or more past due, designated as TDR, graded “special mention” or “substandard.” PULs were evaluated to determine estimated fair values as of the acquisition date. Although no specific credit deficiencies were identifiable, we believe there is an element of risk as to whether all contractual cash flows will be eventually received. Factors that were considered included the economic environment both nationally and locally as well as the real estate market particularly in Florida. We have applied ASC Topic 310-20 accounting treatment to the PULs. The Company believes the deposits assumed from the acquisition have an intangible value. The Company applied ASC Topic 805, which prescribes the accounting for goodwill and other intangible assets such as core deposit intangibles, in a business combination. In determining the valuation amount, a third party analyzed the deposits based on factors such as type of deposit, deposit retention, interest rates and age of deposit relationships. The Company recognized intangibles (including goodwill) of approximately $ 13 15 Acquisition of GulfShore Bancshares, Inc. On April 7, 2017, the Company completed its acquisition of GulfShore. Simultaneously, upon completion of the merger, GulfShore’s wholly owned subsidiary bank, GulfShore Bank, was merged with and into Seacoast Bank. GulfShore, headquartered in Tampa, Florida, operated 3 branches in Tampa and St. Petersburg, of which all have been retained as Seacoast locations. 100 April 7, 2017 Shares exchanged for cash $ 8,033,999 Number of GulfShore Bancshares, Inc. common shares outstanding 5,464,308 Per share exchange ratio 0.4807 Number of shares of Seacoast common stock issued 2,626,693 Multiplied by common stock price per share on April 7, 2017 $ 23.94 Value of common stock issued 62,883,030 Total purchase price $ 70,917,029 Merger related charges summed to $ 4.3 Business Combinations 37 Measurement Initial Report Period As Adjusted Date of acquisition April 7, 2017 Adjustments April 7, 2017 (in thousands) Assets: Cash $ 55,540 $ 0 $ 55,540 Investment securities 316 0 316 Loans, net 250,884 (8) 250,876 Fixed assets 1,307 0 1,307 Other real estate owned 13 0 13 Core deposit intangibles 3,927 0 3,927 Goodwill 37,090 8 37,098 Other assets 8,572 0 8,572 $ 357,649 $ 0 $ 357,649 Liabilities: Deposits $ 285,350 $ 0 $ 285,350 Other liabilities 1,382 0 1,382 $ 286,732 $ 0 $ 286,732 The table below presents information with respect to the fair value of acquired loans, as well as their unpaid principal balance (“Book Balance”) at acquisition date. April 7, 2017 (In thousands) Book Balance Fair Value Loans: Single family residential real estate $ 101,281 $ 99,598 Commercial real estate 106,729 103,905 Construction/development/land 13,175 11,653 Commercial loans 32,137 32,247 Consumer and other loans 3,554 3,473 Purchased credit-impaired 0 0 Total acquired loans $ 256,876 $ 250,876 No loans acquired were specifically identified with credit deficiency factor(s), pursuant to ASC Topic 310-30. The factors we considered to identify loans as PCI loans were all acquired loans that were nonaccrual, 60 days or more past due, designated as TDR, graded “special mention” or “substandard.” Loans without specifically identified credit deficiency factors are referred to as PULs for disclosure purposes. These loans were then evaluated to determine estimated fair values as of the acquisition date. Although no specific credit deficiencies were identifiable, we believe there is an element of risk as to whether all contractual cash flows will be eventually received. Factors that were considered included the economic environment both nationally and locally as well as the real estate market particularly in Florida. We have applied ASC Topic 310-20 accounting treatment to the PULs. The Company believes the deposits assumed from the acquisition have an intangible value. The Company applied ASC Topic 805, which prescribes the accounting for goodwill and other intangible assets such as core deposit intangibles, in a business combination. In determining the valuation amount, deposits were analyzed based on factors such as type of deposit, deposit retention, interest rates and age of deposit relationships. The determination of fair value required management to make estimates about discount rates, future expected cash flows, market conditions and other future events that are highly subjective in nature and subject to change, and in some instances rely on use of third party experts. These fair value estimates are considered preliminary and are subject to change for up to one year after the closing date of the acquisition as additional information becomes available. For GulfShore, fair values as presented for securities, loans, fixed assets, other real estate owned, and certain other assets and liabilities are necessarily considered preliminary. Operating results of the Company for the three months ended September 30, 2017 include the operation of the acquired assets and assumed liabilities since the date of acquisition of April 7, 2017. Three Months Ended September 30, Nine Months Ended September 30, (In thousands, except per share amounts) 2016 2017 2016 Net interest income $ 40,102 $ 131,178 $ 109,738 Net income 9,798 30,884 20,364 EPS - basic 0.24 0.73 0.52 EPS - diluted 0.24 0.72 0.51 Acquisition of NorthStar Bank On October 20, 2017, the Company completed its acquisition of NorthStar Banking Corporation (“NSBC”). Simultaneously, upon completion of the merger, NSBC’s wholly owned subsidiary bank, NorthStar Bank, was merged with and into Seacoast Bank. NorthStar, headquartered in Tampa, Florida, operated three branches in Tampa, of which all have been retained as Seacoast locations. 100 October 20, 2017 Shares exchanged for cash $ 4,700,129 Number of NorthStar Banking Corporation common shares outstanding 1,958,387 Per share exchange ratio 0.5605 Number of shares of Seacoast common stock issued 1,097,675 Multiplied by common stock price per share on October 20, 2017 $ 24.92 Value of common stock issued 27,354,061 Cash paid for NorthStar Banking vested Corporation stock options 801,168 Total purchase price $ 32,855,358 Acquisition of Palm Beach Community Bank On November 3, 2017, the Company completed its acquisition of Palm Beach Community Bank (“PBCB”), and PBCB was merged with and into Seacoast Bank. PBCB, headquartered in West Palm Beach, Florida, operated four branches in West Palm Beach, of which all have been retained as Seacoast locations. 100 November 3, 2017 Shares exchanged for cash $ 15,693,929 Number of Palm Beach Community Bank common shares outstanding 2,506,867 Per share exchange ratio 0.9240 Number of shares of Seacoast common stock issued 2,316,345 Multiplied by common stock price per share on November 3, 2017 $ 24.31 Value of common stock issued 56,310,350 Total purchase price $ 72,004,279 The acquisitions of NorthStar and PBCB will be accounted for under the acquisition method of accounting in accordance with ASC Topic 805, Business Combinations. The Company’s assessment of the fair value of assets acquired and liabilities assumed as of the acquisition date is incomplete at the time of this filing; therefore, certain disclosures have been omitted. The Company expects to recognize goodwill in each of these transactions, which is expected to be nondeductible for tax purposes.

BASIS OF PRESENTATION (Policies

BASIS OF PRESENTATION (Policies)	9 Months Ended
	Sep. 30, 2017
Accounting Policies [Abstract]
Use of Estimates	Use of Estimates The preparation of these condensed consolidated financial statements required the use of certain estimates by management in determining the Company’s assets, liabilities, revenues and expenses. Actual results could differ from those estimates. Specific areas, among others, requiring the application of management’s estimates include determination of the allowance for loan losses, the valuation of investment securities available for sale, fair value of impaired loans, contingent liabilities, fair value of other real estate owned, and the valuation of deferred tax assets. Actual results could differ from those estimates.

BASIC AND DILUTED EARNINGS PE21

BASIC AND DILUTED EARNINGS PER COMMON SHARE (Tables)	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	Options to purchase 274,000 191,000 243,000 199,000 Three Months Ended Nine Months Ended September 30, September 30, (Dollars in thousands, except per share data) 2017 2016 2017 2016 Basic: Income available to common shareholders $ 14,216 $ 9,133 $ 29,818 $ 18,431 Average basic shares outstanding 43,151,248 37,549,804 41,626,356 36,626,290 Basic earnings per share $ 0.33 $ 0.24 $ 0.72 $ 0.50 Diluted: Income available to common shareholders $ 14,216 $ 9,133 $ 29,818 $ 18,431 Average basic shares outstanding 43,151,248 37,549,804 41,626,356 36,626,290 Restricted stock and stock options 640,860 620,059 671,780 631,843 Average diluted shares outstanding 43,792,108 38,169,863 42,298,136 37,258,133 Diluted earnings per share $ 0.32 $ 0.24 $ 0.70 $ 0.49

SECURITIES (Tables)

SECURITIES (Tables)	9 Months Ended
	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Amortized Cost and Fair Value of Securities Available for Sale and Held for Investment	The amortized cost, unrealized gains and losses, and fair value of securities available for sale and held to maturity at September 30, 2017 and December 31, 2016 are summarized as follows: September 30, 2017 Gross Gross Gross Amortized Unrealized Unrealized Fair (Dollars in thousands) Cost Gains Losses Value SECURITIES AVAILABLE FOR SALE U.S. Treasury securities and obligations of U.S. Government Sponsored Entities $ 9,830 $ 310 $ 0 $ 10,140 Mortgage backed securities of U.S. Government Sponsored Entities 284,015 1,245 (2,298) 282,962 Collateralized mortgage obligations of U.S. Government Sponsored Entities 232,278 525 (4,001) 228,802 Commercial mortgage backed securities of U.S. Government Sponsored Entities 22,274 355 (10) 22,619 Private mortgage backed securities 32,928 925 0 33,853 Private collateralized mortgage obligations 50,725 682 (302) 51,105 Collateralized loan obligations 207,341 794 (18) 208,117 Obligations of state and political subdivisions 59,495 1,065 (375) 60,185 Corporate and other debt securities 70,083 803 (89) 70,797 Private commercial mortgage backed securities 28,186 198 (165) 28,219 $ 997,155 $ 6,902 $ (7,258) $ 996,799 SECURITIES HELD TO MATURITY Mortgage backed securities of U.S. Government Sponsored Entities $ 179,437 $ 1,403 $ (996) $ 179,844 Collateralized mortgage obligations of U.S. Government Sponsored Entities 126,849 462 (1,506) 125,805 Commercial mortgage backed securities of U.S. Government Sponsored Entities 17,441 645 0 18,086 Collateralized loan obligations 45,438 228 0 45,666 Private collateralized mortgage obligations 5,608 8 (56) 5,560 $ 374,773 $ 2,746 $ (2,558) $ 374,961 December 31, 2016 Gross Gross Gross Amortized Unrealized Unrealized Fair (Dollars in thousands) Cost Gains Losses Value SECURITIES AVAILABLE FOR SALE U.S. Treasury securities and obligations of U.S. Government Sponsored Entities $ 12,073 $ 255 $ 0 $ 12,328 Mortgage backed securities of U.S. Government Sponsored Entities 287,726 585 (4,823) 283,488 Collateralized mortgage obligations of U.S. Government Sponsored Entities 238,805 314 (5,065) 234,054 Commercial mortgage backed securities of U.S. Government Sponsored Entities 22,351 222 (28) 22,545 Private mortgage backed securities 32,780 0 (791) 31,989 Private collateralized mortgage obligations 67,542 563 (816) 67,289 Collateralized loan obligations 124,716 838 (665) 124,889 Obligations of state and political subdivisions 63,161 622 (895) 62,888 Corporate and other debt securities 74,121 257 (517) 73,861 Private commercial mortgage backed securities 37,534 111 (473) 37,172 $ 960,809 $ 3,767 $ (14,073) $ 950,503 SECURITIES HELD TO MATURITY Mortgage backed securities of U.S. Government Sponsored Entities $ 159,941 $ 704 $ (1,243) $ 159,402 Collateralized mortgage obligations of U.S. Government Sponsored Entities 147,208 386 (2,630) 144,964 Commercial mortgage backed securities of U.S. Government Sponsored Entities 17,375 233 (74) 17,534 Collateralized loan obligations 41,547 430 (314) 41,663 Private collateralized mortgage obligations 6,427 0 (109) 6,318 $ 372,498 $ 1,753 $ (4,370) $ 369,881
Amortized Cost and Fair Value of Securities by Contractual Maturity	The amortized cost and fair value of securities available for sale and held to maturity at September 30, 2017, by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because prepayments of the underlying collateral for these securities may occur, due to the right to call or repay obligations with or without call or prepayment penalties. Securities not due at a single maturity date are shown separately. Held to Maturity Available for Sale Amortized Fair Amortized Fair (Dollars in thousands) Cost Value Cost Value Due in less than one year $ 0 $ 0 $ 6,103 $ 6,108 Due after one year through five years 3,600 3,614 79,463 80,338 Due after five years through ten years 41,838 42,052 224,255 225,737 Due after ten years 0 0 26,525 26,635 45,438 45,666 336,346 338,818 Mortgage backed securities of U.S. Government Sponsored Entities 179,437 179,844 284,015 282,962 Collateralized mortgage obligations of U.S. Government Sponsored Entities 126,849 125,805 232,278 228,802 Commercial mortgage backed securities of U.S. Government Sponsored Entities 17,441 18,086 22,274 22,619 Private mortgage backed securities 0 0 32,928 33,853 Private collateralized mortgage obligations 5,608 5,560 50,725 51,105 Other debt securities 0 0 10,403 10,421 Private commercial mortgage backed securities 0 0 28,186 28,219 $ 374,773 $ 374,961 $ 997,155 $ 996,799
Schedule of Unrealized Loss and Fair Value on Investments	The tables below indicate the amount of securities with unrealized losses and the period of time for which these losses were outstanding at September 30, 2017 and December 31, 2016, respectively. September 30, 2017 Less than 12 months 12 months or longer Total Fair Unrealized Fair Unrealized Fair Unrealized (Dollars in thousands) Value Losses Value Losses Value Losses Mortgage backed securities of U.S. Government Sponsored Entities $ 152,796 $ (1,963) $ 109,433 $ (1,331) $ 262,229 $ (3,294) Collateralized mortgage obligations of U.S. Government Sponsored Entities 51,067 (365) 225,546 (5,142) 276,613 (5,507) Commercial mortgage-backed securities of U.S. Government Sponsored Entities 3,111 (10) 0 0 3,111 (10) Private mortgage backed securities 0 0 0 0 0 0 Private collateralized mortgage obligations 0 0 22,003 (358) 22,003 (358) Collateralized loan obligations 21,998 (18) 0 0 21,998 (18) Obligations of state and political subdivisions 11,556 (86) 5,639 (289) 17,195 (375) Corporate and other debt securities 998 0 8,301 (89) 9,299 (89) Private commercial mortgage backed securities 7,887 (95) 3,727 (70) 11,614 (165) Total temporarily impaired securities $ 249,413 $ (2,537) $ 374,649 $ (7,279) $ 624,062 $ (9,816) December 31, 2016 Less than 12 months 12 months or longer Total Fair Unrealized Fair Unrealized Fair Unrealized (Dollars in thousands) Value Losses Value Losses Value Losses Mortgage backed securities of U.S. Government Sponsored Entities $ 327,759 $ (5,991) $ 5,387 $ (75) $ 333,146 $ (6,066) Collateralized mortgage obligations of U.S. Government Sponsored Entities 234,175 (5,599) 58,912 (2,096) 293,087 (7,695) Commercial mortgage backed securities of U.S. Government Sponsored Entities 7,934 (102) 0 0 7,934 (102) Private mortgage backed securities 0 0 36,848 (900) 36,848 (900) Private collateralized mortgage obligations 1,460 0 38,417 (816) 39,877 (816) Collateralized loan obligations 8,152 (41) 51,694 (938) 59,846 (979) Obligations of state and political subdivisions 39,321 (895) 0 0 39,321 (895) Corporate and other debt securities 33,008 (517) 0 0 33,008 (517) Private commercial mortgage backed securities 12,667 (306) 7,139 (167) 19,806 (473) Total temporarily impaired securities $ 664,476 $ (13,451) $ 198,397 $ (4,992) $ 862,873 $ (18,443)

LOANS (Tables)

LOANS (Tables)	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
Schedule of Accounts, Notes, Loans and Financing Receivable	Information relating to portfolio loans, purchased credit impaired (“PCI”) loans, and purchased unimpaired loans (“PUL”) as of September 30, 2017 and December 31, 2016 is summarized as follows: September 30, 2017 Portfolio Loans PCI Loans PUL's Total (In thousands) Construction and land development $ 200,860 $ 116 $ 44,175 $ 245,151 Commercial real estate 1,146,359 8,975 322,758 1,478,092 Residential real estate 832,656 528 107,985 941,169 Commercial and financial 476,511 824 58,122 535,457 Consumer 180,467 0 4,018 184,485 Other loans 637 0 0 637 NET LOAN BALANCES (1) $ 2,837,490 $ 10,443 $ 537,058 $ 3,384,991 December 31, 2016 Portfolio Loans PCI Loans PUL's Total (In thousands) Construction and land development $ 137,480 $ 114 $ 22,522 $ 160,116 Commercial real estate 1,041,915 11,257 304,420 1,357,592 Residential real estate 784,290 684 51,813 836,787 Commercial and financial 308,731 941 60,917 370,589 Consumer 152,927 0 1,018 153,945 Other loans 507 0 0 507 NET LOAN BALANCES (1) $ 2,425,850 $ 12,996 $ 440,690 $ 2,879,536 (1) Net loan balances as of September 30, 2017 and December 31, 2016 include deferred costs of $ 12.1 10.6
Contractually Required Principal And Interest Cash Payments Changes	Activity during the three months ended September 30, 2017: Reclassifications from nonaccretable September 30, June 30, 2017 Additions Deletions Accretion difference 2017 (In thousands) Accretable yield $ 3,265 0 0 (357) 407 $ 3,315 Recorded investment of acquired loans $ 13,132 $ 10,443 Allowance for loan losses 0 0 Recorded investment less allowance for loan losses $ 13,132 $ 10,443 Activity during the nine months ended September 30, 2017: Reclassifications from December 31, nonaccretable September 30, 2016 Additions Deletions Accretion difference 2017 (In thousands) Accretable yield $ 3,807 0 (10) (1,173) 691 $ 3,315 Recorded investment of acquired loans $ 12,996 $ 10,443 Allowance for loan losses 0 0 Recorded investment less allowance for loan losses $ 12,996 $ 10,443 Activity during the three months ended September 30, 2016: Reclassifications from nonaccretable September 30, June 30, 2016 Additions Deletions Accretion difference 2016 (In thousands) Accretable yield $ 4,674 0 0 (492) 0 $ 4,182 Recorded investment of acquired loans $ 13,652 $ 13,057 Allowance for loan losses 0 Recorded investment less allowance for loan losses $ 13,652 $ 13,057 Activity during the nine months ended September 30, 2016: Reclassifications from December 31, nonaccretable September 30, 2015 Additions Deletions Accretion difference 2016 (In thousands) Accretable yield $ 2,610 2,094 (15) (1,499) 992 $ 4,182 Recorded investment of acquired loans $ 12,109 $ 13,057 Allowance for loan losses 0 0 Recorded investment less allowance for loan losses $ 12,109 $ 13,057
Past Due Financing Receivables	The following tables present the contractual delinquency of the recorded investment in past due loans by class of loans as of September 30, 2017 and December 31, 2016: Accruing Accruing Accruing Greater Total September 30, 2017 30-59 Days 60-89 Days Than Financing (In thousands) Past Due Past Due 90 Days Nonaccrual Current Receivables Portfolio Loans Construction and land development $ 273 $ 0 $ 0 $ 364 $ 200,223 $ 200,860 Commercial real estate 646 0 0 1,870 1,143,843 1,146,359 Residential real estate 1,013 107 0 8,341 823,195 832,656 Commercial and financial 1,699 0 0 193 474,619 476,511 Consumer 396 16 0 109 179,946 180,467 Other 0 0 0 0 637 637 Total 4,027 123 0 10,877 2,822,463 2,837,490 Purchased Unimpaired Loans Construction and land development 35 0 0 72 44,068 44,175 Commercial real estate 860 0 0 732 321,166 322,758 Residential real estate 152 113 0 1,163 106,557 107,985 Commercial and financial 321 0 0 332 57,469 58,122 Consumer 0 0 0 0 4,018 4,018 Other 0 0 0 0 0 0 Total 1,368 113 0 2,299 533,278 537,058 Purchased Credit Impaired Loans Construction and land development 0 0 0 0 116 116 Commercial real estate 0 0 0 1,199 7,776 8,975 Residential real estate 0 0 0 0 528 528 Commercial and financial 0 0 0 0 824 824 Consumer 0 0 0 0 0 0 Other 0 0 0 0 0 0 Total 0 0 0 1,199 9,244 10,443 Total Loans $ 5,395 $ 236 $ 0 $ 14,375 $ 3,364,985 $ 3,384,991 Accruing Accruing Accruing Greater Total December 31, 2016 30-59 Days 60-89 Days Than Financing (In thousands) Past Due Past Due 90 Days Nonaccrual Current Receivables Portfolio Loans Construction and land development 0 0 0 438 137,042 137,480 Commercial real estate 78 171 0 1,784 1,039,882 1,041,915 Residential real estate 1,570 261 0 8,582 773,877 784,290 Commercial and financial 30 0 0 49 308,652 308,731 Consumer 29 59 0 170 152,669 152,927 Other 0 0 0 0 507 507 Total 1,707 491 0 11,023 2,412,629 2,425,850 Purchased Unimpaired Loans Construction and land development 0 0 0 32 22,490 22,522 Commercial real estate 345 485 0 1,272 302,318 304,420 Residential real estate 153 0 0 1,262 50,398 51,813 Commercial and financial 39 328 0 197 60,353 60,917 Consumer 37 0 0 0 981 1,018 Other 0 0 0 0 0 0 Total 574 813 0 2,763 436,540 440,690 Purchased Impaired Loans Construction and land development 0 0 0 0 114 114 Commercial real estate 0 0 0 4,285 6,972 11,257 Residential real estate 0 185 0 0 499 684 Commercial and financial 0 0 0 0 941 941 Consumer 0 0 0 0 0 0 Other 0 0 0 0 0 0 Total 0 185 0 4,285 8,526 12,996 Total Loans $ 2,281 $ 1,489 $ 0 $ 18,071 $ 2,857,695 $ 2,879,536
Financing Receivable Credit Quality Indicators	The following tables present the risk category of loans by class of loans based on the most recent analysis performed as of September 30, 2017 and December 31, 2016: September 30, 2017 Construction Commercial & Land Commercial Residential and Consumer (In thousands) Development Real Estate Real Estate Financial Loans Total Pass $ 232,183 $ 1,442,538 $ 917,500 $ 527,190 $ 183,031 $ 3,302,442 Special mention 8,844 11,534 1,317 3,414 1,462 26,571 Substandard 3,439 14,466 2,966 4,328 223 25,422 Doubtful 0 0 0 0 0 0 Nonaccrual 436 3,801 9,504 525 109 14,375 Pass-Troubled debt restructures 33 4,876 0 0 0 4,909 Troubled debt restructures 216 877 9,882 0 297 11,272 $ 245,151 $ 1,478,092 $ 941,169 $ 535,457 $ 185,122 $ 3,384,991 December 31, 2016 Construction Commercial & Land Commercial Residential and Consumer (In thousands) Development Real Estate Real Estate Financial Loans Total Pass $ 148,563 $ 1,319,696 $ 811,576 $ 364,241 $ 153,730 $ 2,797,806 Special mention 5,037 17,184 1,780 3,949 67 28,017 Substandard 5,497 7,438 2,709 2,153 134 17,931 Doubtful 0 0 0 0 0 0 Nonaccrual 470 7,341 9,844 246 170 18,071 Pass-Troubled debt restructures 44 4,988 358 0 44 5,434 Troubled debt restructures 505 945 10,520 0 307 12,277 $ 160,116 $ 1,357,592 $ 836,787 $ 370,589 $ 154,452 $ 2,879,536

IMPAIRED LOANS AND ALLOWANCE 24

IMPAIRED LOANS AND ALLOWANCE FOR LOAN LOSSES (Tables)	9 Months Ended
	Sep. 30, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Troubled Debt Restructurings on Financing Receivables	The following table presents loans that were modified during the nine months ended September 30, 2017: Pre- Post- Modification Modification Number Outstanding Outstanding Valuation of Recorded Recorded Allowance (Dollars in thousands) Contracts Investment Investment Recorded Construction and land development 1 $ 52 $ 46 $ 6 Residential real estate 1 15 15 0 2 $ 67 $ 61 $ 6 The following table presents loans that were modified during the nine months ended September 30, 2016: Pre- Post- Modification Modification Number Outstanding Outstanding Valuation of Recorded Recorded Allowance (Dollars in thousands) Contracts Investment Investment Recorded Residential real estate 6 $ 1,660 $ 1,489 $ 171 6 $ 1,660 $ 1,489 $ 171
Impaired Financing Receivables	As of September 30, 2017 and December 31, 2016, the Company’s recorded investment in impaired loans (excluding PCI loans), the unpaid principal balance, and the related valuation allowance were as follows: September 30, 2017 Unpaid Related Recorded Principal Valuation (Dollars in thousands) Investment Balance Allowance Impaired Loans with No Related Allowance Recorded: Construction and land development $ 397 $ 702 $ 0 Commercial real estate 3,431 4,811 0 Residential real estate 10,598 15,283 0 Commercial and financial 29 39 0 Consumer 117 191 0 Impaired Loans with an Allowance Recorded: Construction and land development 289 355 91 Commercial real estate 4,931 4,939 222 Residential real estate 8,773 8,970 1,188 Commercial and financial 1,127 501 521 Consumer 290 292 48 Total: Construction and land development 686 1,057 91 Commercial real estate 8,362 9,750 222 Residential real estate 19,371 24,253 1,188 Commercial and financial 1,156 540 521 Consumer 407 483 48 $ 29,982 $ 36,083 $ 2,070 December 31, 2016 Unpaid Related Recorded Principal Valuation (Dollars in thousands) Investment Balance Allowance Impaired Loans with No Related Allowance Recorded: Construction and land development $ 226 $ 321 $ 0 Commercial real estate 3,267 4,813 0 Residential real estate 9,706 14,136 0 Commercial and financial 199 206 0 Consumer 0 0 0 Impaired Loans with an Allowance Recorded: Construction and land development 51 51 0 Commercial real estate 6,937 6,949 395 Residential real estate 12,332 12,681 2,059 Commercial and financial 0 0 0 Consumer 0 0 0 Total: Construction and land development 277 372 0 Commercial real estate 10,204 11,762 395 Residential real estate 22,038 26,817 2,059 Commercial and financial 199 206 0 Consumer 0 0 0 $ 32,718 $ 39,157 $ 2,454 For the three months ended September 30, 2017 and 2016, the Company’s average recorded investments in impaired loans (excluding PCI loans) and related interest income were as follows: Three Months Ended Three Months Ended September 30, 2017 September 30, 2016 Average Interest Average Interest Recorded Income Recorded Income (Dollars in thousands) Investment Recognized Investment Recognized Impaired Loans with No Related Allowance Recorded: Construction & land development $ 517 $ 13 $ 208 $ 3 Commercial real estate 3,004 75 1,437 31 Residential real estate 10,266 150 9,346 138 Commercial and financial 244 1 16 0 Consumer 124 3 157 3 Impaired Loans with an Allowance Recorded: Construction & land development 333 2 609 7 Commercial real estate 4,953 56 6,565 64 Residential real estate 9,831 63 12,038 102 Commercial and financial 646 2 0 0 Consumer 333 3 383 4 Total: Construction & land development 850 15 817 10 Commercial real estate 7,957 131 8,002 95 Residential real estate 20,097 213 21,384 240 Commercial and financial 890 3 16 0 Consumer 457 6 540 7 $ 30,251 $ 368 $ 30,759 $ 352 For the nine months ended September 30, 2017 and 2016, the Company’s average recorded investments in impaired loans and related interest income were as follows: Nine Months Ended Nine Months Ended September 30, 2017 September 30, 2016 Average Interest Average Interest Recorded Income Recorded Income (Dollars in thousands) Investment Recognized Investment Recognized Impaired Loans with No Related Allowance Recorded: Construction & land development $ 460 $ 35 $ 188 $ 11 Commercial real estate 2,833 154 1,854 97 Residential real estate 9,933 447 9,444 406 Commercial and financial 183 3 16 0 Consumer 111 10 193 10 Impaired Loans with an Allowance Recorded: Construction & land development 242 8 671 20 Commercial real estate 5,789 163 6,835 193 Residential real estate 11,029 260 12,098 322 Commercial and financial 378 14 0 0 Consumer 247 12 363 14 Total: Construction & land development 702 43 859 31 Commercial real estate 8,622 317 8,689 290 Residential real estate 20,962 707 21,542 728 Commercial and financial 561 17 16 0 Consumer 358 22 556 24 $ 31,205 $ 1,106 $ 31,662 $ 1,073
Allowance for Credit Losses on Financing Receivables	Activity in the allowance for loan losses (excluding PCI loans) for the three month and nine month periods ended September 30, 2017 and 2016 is summarized as follows: Allowance for Loan Losses for the Three Months Ended September 30, 2017 Provision TDR Beginning for Loan Charge- Valuation Ending (Dollars in thousands) Balance Losses Offs Recoveries Adjustments Balance Construction & land development $ 1,574 $ (690) $ 0 $ 728 $ 0 $ 1,612 Commercial real estate 9,923 62 (239) 175 (15) 9,906 Residential real estate 7,423 116 (296) 39 (148) 7,134 Commercial and financial 5,460 834 (333) 28 0 5,989 Consumer 1,620 358 (442) 61 (6) 1,591 $ 26,000 $ 680 $ (1,310) $ 1,031 $ (169) $ 26,232 Allowance for Loan Losses for the Nine Months Ended September 30, 2017 Provision TDR Beginning for Loan Charge- Valuation Ending (Dollars in thousands) Balance Losses Offs Recoveries Adjustments Balance Construction & land development $ 1,219 $ (496) $ 0 $ 891 $ (2) $ 1,612 Commercial real estate 9,273 410 (341) 613 (49) 9,906 Residential real estate 7,483 90 (482) 266 (223) 7,134 Commercial and financial 3,636 3,036 (837) 154 0 5,989 Consumer 1,789 345 (756) 221 (8) 1,591 $ 23,400 $ 3,385 $ (2,416) $ 2,145 $ (282) $ 26,232 Allowance for Loan Losses for the Three Months Ended September 30, 2016 Provision TDR Beginning for Loan Charge- Valuation Ending (Dollars in thousands) Balance Losses Offs Recoveries Adjustments Balance Construction & land development $ 1,160 $ 50 $ 0 $ 25 $ (2) $ 1,233 Commercial real estate 7,192 1,505 (78) 169 (55) 8,733 Residential real estate 8,299 (637) 0 272 (25) 7,909 Commercial and financial 2,591 (633) (200) 1,278 0 3,036 Consumer 1,483 265 (18) 44 (1) 1,773 $ 20,725 $ 550 $ (296) $ 1,788 $ (83) $ 22,684 Allowance for Loan Losses for the Nine Months Ended September 30, 2016 Provision TDR Beginning for Loan Charge- Valuation Ending (Dollars in thousands) Balance Losses Offs Recoveries Adjustments Balance Construction & land development $ 1,151 $ (125) $ 0 $ 214 $ (7) $ 1,233 Commercial real estate 6,756 2,025 (209) 271 (110) 8,733 Residential real estate 8,057 (626) (135) 669 (56) 7,909 Commercial and financial 2,042 (524) (255) 1,773 0 3,036 Consumer 1,122 661 (98) 91 (3) 1,773 $ 19,128 $ 1,411 $ (697) $ 3,018 $ (176) $ 22,684
Loan Portfolio And Related Allowance	The allowance for loan losses is composed of specific allowances for certain impaired loans and general allowances grouped into loan pools based on similar characteristics. The Company’s loan portfolio (excluding PCI loans) and related allowance at September 30, 2017 and December 31, 2016 is shown in the following tables: At September 30, 2017 Individually Evaluated for Collectively Evaluated for Impairment Impairment Total Recorded Associated Recorded Associated Recorded Associated (Dollars in thousands) Investment Allowance Investment Allowance Investment Allowance Construction & land development $ 686 $ 91 $ 244,349 $ 1,521 $ 245,035 $ 1,612 Commercial real estate 8,362 222 1,460,755 9,684 1,469,117 9,906 Residential real estate 19,371 1,188 921,270 5,946 940,641 7,134 Commercial and financial 1,156 521 533,477 5,468 534,633 5,989 Consumer 407 48 184,715 1,543 185,122 1,591 $ 29,982 $ 2,070 $ 3,344,566 $ 24,162 $ 3,374,548 $ 26,232 At December 31, 2016 Individually Evaluated for Collectively Evaluated for Impairment Impairment Total Recorded Associated Recorded Associated Recorded Associated (Dollars in thousands) Investment Allowance Investment Allowance Investment Allowance Construction & land development $ 277 $ 0 $ 159,839 $ 1,219 $ 160,116 $ 1,219 Commercial real estate 10,204 395 1,335,832 8,878 1,346,036 9,273 Residential real estate 22,038 2,059 814,250 5,424 836,288 7,483 Commercial and financial 199 0 369,449 3,636 369,648 3,636 Consumer 0 0 154,452 1,789 154,452 1,789 $ 32,718 $ 2,454 $ 2,833,822 $ 20,946 $ 2,866,540 $ 23,400
PCI Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loan Portfolio And Related Allowance	The table below summarizes PCI loans that were individually evaluated for impairment based on expected cash flows at September 30, 2017 and December 31, 2016: PCI Loans Individually Evaluated for Impairment September 30, 2017 December 31, 2016 Recorded Associated Recorded Associated (Dollars in thousands) Investment Allowance Investment Allowance Construction & land development $ 116 $ 0 $ 114 $ 0 Commercial real estate 8,975 0 11,257 0 Residential real estate 528 0 684 0 Commercial and financial 824 0 941 0 Consumer 0 0 0 0 $ 10,443 $ 0 $ 12,996 $ 0

SECURITIES SOLD UNDER AGREEME25

SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE (Tables)	9 Months Ended
	Sep. 30, 2017
Brokers and Dealers [Abstract]
Schedule of Securities Financing Transactions	At September 30, 2017 and December 31, 2016, the fair value of Company securities pledged under agreements to repurchase were as follows by collateral type and maturity: Overnight and Continuous Maturity September 30, December 31, (Dollars in thousands) 2017 2016 Mortgage backed securities and collateralized mortgage obligations of U.S. Government Sponsored Entities $ 142,153 $ 204,202

NONINTEREST INCOME AND EXPENS26

NONINTEREST INCOME AND EXPENSES (Tables)	9 Months Ended
	Sep. 30, 2017
Noninterest Income and Expenses [Abstract]
Summary of Noninterest Income and Expense	Detail of noninterest income and expenses as of the three and nine months ended September 30, 2017 and 2016 follows: Three Months Ended Nine Months Ended September 30, September 30, (In thousands) 2017 2016 2017 2016 Noninterest income Service charges on deposits $ 2,626 $ 2,698 $ 7,483 $ 7,057 Trust income 967 820 2,764 2,464 Mortgage banking fees 2,138 1,885 4,962 4,248 Brokerage commissions and fees 351 463 1,079 1,564 Marine finance fees 137 138 597 558 Interchange income 2,582 2,306 7,747 6,893 Other deposit-based EFT fees 100 109 354 352 BOLI income 836 382 2,326 1,602 Other income 1,744 963 4,541 2,767 11,481 9,764 31,853 27,505 Securities gains (losses), net (47) 225 (26) 361 TOTAL $ 11,434 $ 9,989 $ 31,827 $ 27,866 Noninterest expense Salaries and wages $ 15,627 $ 14,337 $ 49,371 $ 41,620 Employee benefits 2,917 2,425 8,920 7,428 Outsourced data processing costs 3,231 3,198 9,956 10,440 Telephone/data lines 573 539 1,753 1,606 Occupancy 2,447 3,675 10,025 10,292 Furniture and equipment 1,191 1,228 4,261 3,509 Marketing 1,298 780 3,294 2,786 Legal and professional fees 2,560 2,213 7,968 7,226 FDIC assessments 548 517 1,768 1,704 Amortization of intangibles 839 728 2,397 1,767 Asset disposition expense 117 219 306 469 Net loss (gain) on other real estate owned and repossessed assets (414) (96) (599) (348) Early redemption cost for Federal Home Loan Bank borrowings 0 0 0 1,777 Other 3,427 3,672 11,312 10,308 TOTAL $ 34,361 $ 33,435 $ 110,732 $ 100,584

FAIR VALUE (Tables)

FAIR VALUE (Tables)	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value, Assets Measured on Recurring and Nonrecurring Basis	Under ASC 820, fair value measurements for items measured at fair value on a recurring and nonrecurring basis at September 30, 2017 and December 31, 2016 included: Quoted Prices in Active Significant Markets for Other Significant Identical Observable Unobservable Fair Value Assets Inputs Inputs (Dollars in thousands) Measurements (Level 1) (Level 2) (Level 3) At September 30, 2017: Available for sale securities (1) $ 996,799 $ 100 $ 996,699 $ 0 Loans held for sale (2) 29,447 0 29,447 0 Loans (3) 4,160 0 2,973 1,187 Other real estate owned (4) 7,142 0 0 7,142 At December 31, 2016: Available for sale securities (1) $ 950,503 $ 100 $ 950,403 $ 0 Loans held for sale (2) 15,332 0 15,332 0 Loans (3) 4,120 0 3,170 950 Other real estate owned (4) 9,949 0 0 9,949 (1) See Note D for further detail of fair value of individual investment categories. (2) Recurring fair value basis determined using observable market data. (3) See Note F. Nonrecurring fair value adjustments to loans identified as impaired reflect full or partial write-downs that are based on the loan’s observable market price or current appraised value of the collateral in accordance with ASC 310. (4) Fair value is measured on a nonrecurring basis in accordance with ASC 360 .
Fair Value Measurements, Recurring and Nonrecurring	The carrying amount and fair value of the Company’s other significant financial instruments that are not measured at fair value on a recurring basis in the balance sheet as of September 30, 2017 and December 31, 2016 is as follows: Quoted Prices in Active Significant Markets for Other Significant Identical Observable Unobservable Carrying Assets Inputs Inputs (Dollars in thousands) Amount (Level 1) (Level 2) (Level 3) At September 30, 2017: Financial Assets Securities held to maturity (1) $ 374,773 $ 0 $ 374,961 $ 0 Time deposits with other banks 14,591 0 0 14,557 Loans, net 3,345,978 0 0 3,328,023 Financial Liabilities Deposit liabilities 4,112,600 0 0 4,110,324 Subordinated debt 70,451 0 55,072 0 At December 31, 2016: Financial Assets Securities held to maturity (1) $ 372,498 $ 0 $ 369,881 $ 0 Loans, net 2,852,016 0 0 2,840,993 Financial Liabilities Deposit liabilities 3,523,245 0 0 3,523,322 Subordinated debt 70,241 0 54,908 0 (1) See Note D for further detail of fair value of individual investment categories.
Schedule of contractual balance and gains or losses aggregate fair value	Loans held for sale were as follows at September 30, 2017 and December 31, 2016: September 30, December 31, (Dollars in thousands) 2017 2016 Aggregate fair value $ 29,447 $ 15,332 Contractual balance 28,782 14,904 Gains 665 428

BUSINESS COMBINATIONS (Tables)

BUSINESS COMBINATIONS (Tables)	9 Months Ended
	Sep. 30, 2017
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Information	Pro-forma data for the three months ended September 30, 2016 and nine months ended September 30, 2017 and 2016 listed in the table below present pro-forma information as if the acquisition occurred at the beginning of 2016. Three Months Ended September 30, Nine Months Ended September 30, (In thousands, except per share amounts) 2016 2017 2016 Net interest income $ 40,102 $ 131,178 $ 109,738 Net income 9,798 30,884 20,364 EPS - basic 0.24 0.73 0.52 EPS - diluted 0.24 0.72 0.51
Floridian Financial Group Inc [Member]
Business Acquisition [Line Items]
Schedule of summarizing the purchase price calculation	The following table represents the purchase price paid to Floridian shareholders in connection with the acquisition: March 11, 2016 Shares exchanged for cash $ 26,699,000 Number of Floridian Financial Group, Inc. common shares outstanding 6,222,119 Per share exchange ratio 0.5289 Number of shares of Seacoast common stock issued 3,291,066 Multiplied by common stock price per share on March 11, 2016 $ 15.47 Value of common stock issued 50,912,791 Total purchase price $ 77,611,791
Schedule of Business Acquisitions, by Acquisition	The acquisition was accounted for under the acquisition method in accordance with ASC Topic 805, Business Combinations Measurement Initial Report Period As Adjusted Date of acquisition March 11, 2016 Adjustments March 11, 2016 (in thousands) Assets: Cash $ 28,243 $ 0 $ 28,243 Investment securities 66,912 95 67,007 Loans, net 268,249 (2,112) 266,137 Fixed assets 7,801 (628) 7,173 Core deposit intangibles 3,375 0 3,375 Goodwill 29,985 1,647 31,632 Other assets 12,879 998 13,877 $ 417,444 $ 0 $ 417,444 Liabilities: Deposits $ 337,341 $ 0 $ 337,341 Other liabilities 2,492 0 2,492 $ 339,833 $ 0 $ 339,833
Fair Value, Assets Measured on Recurring Basis	The table below presents information with respect to the fair value of acquired loans, as well as their unpaid principal balance (“Book Balance”) at acquisition date. March 11, 2016 (In thousands) Book Balance Fair Value Loans: Single family residential real estate $ 38,304 $ 37,367 Commercial real estate 172,531 167,105 Construction/development/land 20,546 18,108 Commercial loans 39,070 37,804 Consumer and other loans 3,385 3,110 Purchased credit-impaired 6,186 2,643 Total acquired loans $ 280,022 $ 266,137
Schedule of Contractually required principal and interest payments	Contractually required principal and interest payments have been adjusted for estimated prepayments. (In thousands) March 11, 2016 Contractually required principal and interest $ 8,031 Non-accretable difference (4,820) Cash flows expected to be collected 3,211 Accretable yield (568) Total purchased credit-impaired loan acquired $ 2,643
BMO Harris Bank [Member]
Business Acquisition [Line Items]
Schedule Of Business Combinations Purchase Price Allocation [Table Text Block]	The acquisition is accounted for under the acquisition method in accordance with ASC Topic 805, Business Combinations Measurement Initial Report Period As Adjusted Date of acquisition June 3, 2016 Adjustments June 3, 2016 (in thousands) Assets: Cash from BMO (net of payable) $ 234,094 $ 0 $ 234,094 Loans, net 62,671 0 62,671 Fixed assets 3,715 0 3,715 Core deposit intangibles 5,223 (135) 5,088 Goodwill 7,645 163 7,808 Other assets 952 (28) 924 $ 314,300 $ 0 $ 314,300 Liabilities: Deposits $ 314,248 $ 0 $ 314,248 Other liabilities 52 0 52 $ 314,300 $ 0 $ 314,300 The table below presents information with respect to the fair value of acquired loans, as well as their unpaid principal balance (“Book Balance”) at acquisition date. June 3, 2016 (In thousands) Book Balance Fair Value Loans: Commercial real estate $ 31,564 $ 31,200 Commercial loans 32,479 31,471 Purchased credit-impaired 0 0 Total acquired loans $ 64,043 $ 62,671
Gulf Shore Banc shares Inc [Member]
Business Acquisition [Line Items]
Schedule of summarizing the purchase price calculation	The Company acquired 100 April 7, 2017 Shares exchanged for cash $ 8,033,999 Number of GulfShore Bancshares, Inc. common shares outstanding 5,464,308 Per share exchange ratio 0.4807 Number of shares of Seacoast common stock issued 2,626,693 Multiplied by common stock price per share on April 7, 2017 $ 23.94 Value of common stock issued 62,883,030 Total purchase price $ 70,917,029
Schedule of Business Acquisitions, by Acquisition	The acquisition was accounted for under the acquisition method in accordance with ASC Topic 805, Business Combinations 37 Measurement Initial Report Period As Adjusted Date of acquisition April 7, 2017 Adjustments April 7, 2017 (in thousands) Assets: Cash $ 55,540 $ 0 $ 55,540 Investment securities 316 0 316 Loans, net 250,884 (8) 250,876 Fixed assets 1,307 0 1,307 Other real estate owned 13 0 13 Core deposit intangibles 3,927 0 3,927 Goodwill 37,090 8 37,098 Other assets 8,572 0 8,572 $ 357,649 $ 0 $ 357,649 Liabilities: Deposits $ 285,350 $ 0 $ 285,350 Other liabilities 1,382 0 1,382 $ 286,732 $ 0 $ 286,732 The table below presents information with respect to the fair value of acquired loans, as well as their unpaid principal balance (“Book Balance”) at acquisition date. April 7, 2017 (In thousands) Book Balance Fair Value Loans: Single family residential real estate $ 101,281 $ 99,598 Commercial real estate 106,729 103,905 Construction/development/land 13,175 11,653 Commercial loans 32,137 32,247 Consumer and other loans 3,554 3,473 Purchased credit-impaired 0 0 Total acquired loans $ 256,876 $ 250,876
NorthStar Bank [Member]
Business Acquisition [Line Items]
Schedule of summarizing the purchase price calculation	The Company acquired 100 October 20, 2017 Shares exchanged for cash $ 4,700,129 Number of NorthStar Banking Corporation common shares outstanding 1,958,387 Per share exchange ratio 0.5605 Number of shares of Seacoast common stock issued 1,097,675 Multiplied by common stock price per share on October 20, 2017 $ 24.92 Value of common stock issued 27,354,061 Cash paid for NorthStar Banking vested Corporation stock options 801,168 Total purchase price $ 32,855,358
Palm Beach Community Bank [Member]
Business Acquisition [Line Items]
Schedule of summarizing the purchase price calculation	The Company acquired 100 November 3, 2017 Shares exchanged for cash $ 15,693,929 Number of Palm Beach Community Bank common shares outstanding 2,506,867 Per share exchange ratio 0.9240 Number of shares of Seacoast common stock issued 2,316,345 Multiplied by common stock price per share on November 3, 2017 $ 24.31 Value of common stock issued 56,310,350 Total purchase price $ 72,004,279

BASIC AND DILUTED EARNINGS PE29

BASIC AND DILUTED EARNINGS PER COMMON SHARE - Additional Information (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	274,000	191,000	243,000	199,000

BASIC AND DILUTED EARNINGS PE30

BASIC AND DILUTED EARNINGS PER COMMON SHARE - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Basic:
Income available to common shareholders	$ 14,216	$ 9,133	$ 29,818	$ 18,431
Average basic shares outstanding	43,151,248	37,549,804	41,626,356	36,626,290
Basic earnings per share	$ 0.33	$ 0.24	$ 0.72	$ 0.5
Diluted:
Income available to common shareholders	$ 14,216	$ 9,133	$ 29,818	$ 18,431
Average basic shares outstanding	43,151,248	37,549,804	41,626,356	36,626,290
Restricted stock and stock options	640,860	620,059	671,780	631,843
Average diluted shares outstanding	43,792,108	38,169,863	42,298,136	37,258,133
Diluted earnings per share	$ 0.32	$ 0.24	$ 0.7	$ 0.49

SECURITIES - Additional Informa

SECURITIES - Additional Information (Details) - USD ($)	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2017	Mar. 31, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2014	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Proceeds from Sale of Available-for-sale Securities, Debt	$ 3,700,000		$ 26,800,000	$ 7,525,000	$ 39,047,000
Available-for-sale Securities, Gross Realized Gains	15,000		301,000	36,000	448,000
Available-for-sale Securities, Gross Realized Losses	62,000		$ 76,000	62,000	$ 87,000
Federal Home Loan Bank Stock and Federal Reserve Bank Stock	38,600,000			38,600,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	624,062,000			624,062,000			$ 862,873,000
Accumulated unrealized losses	9,816,000			9,816,000			18,443,000
Securities Available For Sale Transferred To Held-To-Maturity				60,100,000		$ 158,800,000
Available For Sale Securities Transferred To Held To Maturity Securities Unrealized Gain Loss				3,100,000		$ 3,100,000
Trading Securities, Unrealized Holding Loss				1,500,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	249,413,000			249,413,000			664,476,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	2,537,000			2,537,000			13,451,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	374,649,000			374,649,000			198,397,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 7,279,000			$ 7,279,000			$ 4,992,000
Common Stock, Shares, Outstanding	43,512,179			43,512,179			38,021,835
Stock Issued During Period, Value, Conversion of Convertible Securities, Net of Adjustments, Total		$ 6,200,000
Common Class B [Member]
Schedule of Available-for-sale Securities [Line Items]
Common Stock, Shares, Outstanding	11,330	211,330		11,330
Stock Issued During Period, Shares, Conversion of Convertible Securities		200,000
Common Class A [Member]
Schedule of Available-for-sale Securities [Line Items]
Debt Instrument, Convertible, Conversion Price		$ 1.6483
Stock Issued During Period, Shares, Conversion of Convertible Securities		348,335
Available-for-sale Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	$ 1,500,000			$ 1,500,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	6,600,000			6,600,000			$ 22,800,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	100,000			100,000			400,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value							$ 13,100,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	200,000			200,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	0			0
Carrying Amount [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities pledged as collateral	178,300,000			178,300,000
Carrying Amount [Member] | Repurchase Agreement [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities pledged as collateral	142,200,000			142,200,000
Private Collateralized Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	542,000,000			542,000,000
Accumulated unrealized losses	8,800,000			8,800,000
Seasoned Residential Collateral Of Us Government Sponsored Entities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	22,000,000			22,000,000
Accumulated unrealized losses	$ 400,000			$ 400,000

SECURITIES - Amortized Cost and

SECURITIES - Amortized Cost and Fair Value of Securities Available for Sale and Held for Investment (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Amortized cost and fair value of securities available for sale and held for investment
Gross Amortized Cost, Available for Sale	$ 997,155	$ 960,809
Gross Unrealized Gains, Available for Sale	6,902	3,767
Gross Unrealized Losses, Available for Sale	(7,258)	(14,073)
Fair Value, Available for Sale	996,799	950,503
Gross Amortized Cost, Held for Investment Securities	374,773	372,498
Gross Unrealized Gains, Held for Investment Securities	2,746	1,753
Gross Unrealized Losses, Held for Investment Securities	(2,558)	(4,370)
Fair Value, Held for Investment Securities	374,961	369,881
U.S. Treasury Securities and obligations of U.S. Government Sponsored Entities [Member]
Amortized cost and fair value of securities available for sale and held for investment
Gross Amortized Cost, Available for Sale	9,830	12,073
Gross Unrealized Gains, Available for Sale	310	255
Gross Unrealized Losses, Available for Sale	0	0
Fair Value, Available for Sale	10,140	12,328
Mortgage-backed securities of U.S. Government Sponsored Entities [Member]
Amortized cost and fair value of securities available for sale and held for investment
Gross Amortized Cost, Available for Sale	284,015	287,726
Gross Unrealized Gains, Available for Sale	1,245	585
Gross Unrealized Losses, Available for Sale	(2,298)	(4,823)
Fair Value, Available for Sale	282,962	283,488
Gross Amortized Cost, Held for Investment Securities	179,437	159,941
Gross Unrealized Gains, Held for Investment Securities	1,403	704
Gross Unrealized Losses, Held for Investment Securities	(996)	(1,243)
Fair Value, Held for Investment Securities	179,844	159,402
Collateralized Mortgage Obligations Of US Government Sponsored Entities [Member]
Amortized cost and fair value of securities available for sale and held for investment
Gross Amortized Cost, Available for Sale	232,278	238,805
Gross Unrealized Gains, Available for Sale	525	314
Gross Unrealized Losses, Available for Sale	(4,001)	(5,065)
Fair Value, Available for Sale	228,802	234,054
Gross Amortized Cost, Held for Investment Securities	126,849	147,208
Gross Unrealized Gains, Held for Investment Securities	462	386
Gross Unrealized Losses, Held for Investment Securities	(1,506)	(2,630)
Fair Value, Held for Investment Securities	125,805	144,964
Commercial mortgage backed securities of U.S. Government Sponsored Entities [Member]
Amortized cost and fair value of securities available for sale and held for investment
Gross Amortized Cost, Available for Sale	22,274	22,351
Gross Unrealized Gains, Available for Sale	355	222
Gross Unrealized Losses, Available for Sale	(10)	(28)
Fair Value, Available for Sale	22,619	22,545
Gross Amortized Cost, Held for Investment Securities	17,441	17,375
Gross Unrealized Gains, Held for Investment Securities	645	233
Gross Unrealized Losses, Held for Investment Securities	0	(74)
Fair Value, Held for Investment Securities	18,086	17,534
Private mortgage backed securities [Member]
Amortized cost and fair value of securities available for sale and held for investment
Gross Amortized Cost, Available for Sale	32,928	32,780
Gross Unrealized Gains, Available for Sale	925	0
Gross Unrealized Losses, Available for Sale	0	(791)
Fair Value, Available for Sale	33,853	31,989
Fair Value, Held for Investment Securities	0
Private collateralized mortgage obligations [Member]
Amortized cost and fair value of securities available for sale and held for investment
Gross Amortized Cost, Available for Sale	50,725	67,542
Gross Unrealized Gains, Available for Sale	682	563
Gross Unrealized Losses, Available for Sale	(302)	(816)
Fair Value, Available for Sale	51,105	67,289
Gross Amortized Cost, Held for Investment Securities	5,608	6,427
Gross Unrealized Gains, Held for Investment Securities	8	0
Gross Unrealized Losses, Held for Investment Securities	(56)	(109)
Fair Value, Held for Investment Securities	5,560	6,318
Collateralized loan obligations [Member]
Amortized cost and fair value of securities available for sale and held for investment
Gross Amortized Cost, Available for Sale	207,341	124,716
Gross Unrealized Gains, Available for Sale	794	838
Gross Unrealized Losses, Available for Sale	(18)	(665)
Fair Value, Available for Sale	208,117	124,889
Gross Amortized Cost, Held for Investment Securities	45,438	41,547
Gross Unrealized Gains, Held for Investment Securities	228	430
Gross Unrealized Losses, Held for Investment Securities	0	(314)
Fair Value, Held for Investment Securities	45,666	41,663
Obligations of state and political subdivisions [Member]
Amortized cost and fair value of securities available for sale and held for investment
Gross Amortized Cost, Available for Sale	59,495	63,161
Gross Unrealized Gains, Available for Sale	1,065	622
Gross Unrealized Losses, Available for Sale	(375)	(895)
Fair Value, Available for Sale	60,185	62,888
Corporate and other debt securities [Member]
Amortized cost and fair value of securities available for sale and held for investment
Gross Amortized Cost, Available for Sale	70,083	74,121
Gross Unrealized Gains, Available for Sale	803	257
Gross Unrealized Losses, Available for Sale	(89)	(517)
Fair Value, Available for Sale	70,797	73,861
Fair Value, Held for Investment Securities	0
Private commercial mortgage backed securities [Member]
Amortized cost and fair value of securities available for sale and held for investment
Gross Amortized Cost, Available for Sale	28,186	37,534
Gross Unrealized Gains, Available for Sale	198	111
Gross Unrealized Losses, Available for Sale	(165)	(473)
Fair Value, Available for Sale	28,219	$ 37,172
Fair Value, Held for Investment Securities	$ 0

SECURITIES - Amortized Cost a33

SECURITIES - Amortized Cost and Fair Value of Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Held-to-maturity Securities [Line Items]
Held for Investment, Amortized Cost, Total	$ 374,773	$ 372,498
Held for Investment, Fair Value, Total	374,961	369,881
Available for Sale, Amortized Cost, Total	997,155
Available for Sale, Fair Value, Total	996,799	950,503
Collateralized Loan Obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held for Investment, Amortized Cost, Due in less than one year	0
Held for Investment, Fair Value, Due in less than one year	0
Available for Sale Amortized Cost, Due in less than one year	6,103
Available for Sale, Fair Value, Due in less than one year	6,108
Held for Investment, Amortized Cost, Due after one year through five years	3,600
Held for Investment, Fair Value, Due after one year through five years	3,614
Available for Sale, Amortized Cost, Due after one year through five years	79,463
Available for Sale, Fair Value, Due after one year through five years	80,338
Held for Investment, Amortized Cost, Due after five years through ten years	41,838
Held for Investment, Fair Value, Due after five years through ten years	42,052
Available for Sale, Amortized Cost, Due after five years through ten years	224,255
Available for Sale, Fair Value, Due after five years through ten years	225,737
Held for Investment, Amortized Cost, Due after ten years	0
Held for Investment, Fair Value, Due after ten years	0
Available for Sale, Amortized Cost, Due after ten years	26,525
Available for Sale, Fair Value, Due after ten years	26,635
Held for Investment, Amortized Cost, Total	45,438
Held for Investment, Fair Value, Total	45,666
Available for Sale, Amortized Cost, Total	336,346
Available for Sale, Fair Value, Total	338,818
Mortgage-backed securities of U.S. Government Sponsored Entities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held for Investment, Amortized Cost, Total	179,437
Held for Investment, Fair Value, Total	179,844	159,402
Available for Sale, Amortized Cost, Total	284,015
Available for Sale, Fair Value, Total	282,962	283,488
Collateralized Mortgage Obligations Of US Government Sponsored Entities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held for Investment, Amortized Cost, Total	126,849
Held for Investment, Fair Value, Total	125,805	144,964
Available for Sale, Amortized Cost, Total	232,278
Available for Sale, Fair Value, Total	228,802	234,054
Commercial mortgage backed securities of U.S. Government Sponsored Entities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held for Investment, Amortized Cost, Total	17,441
Held for Investment, Fair Value, Total	18,086	17,534
Available for Sale, Amortized Cost, Total	22,274
Available for Sale, Fair Value, Total	22,619	22,545
Private mortgage backed securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held for Investment, Amortized Cost, Total	0
Held for Investment, Fair Value, Total	0
Available for Sale, Amortized Cost, Total	32,928
Available for Sale, Fair Value, Total	33,853	31,989
Private collateralized mortgage obligations [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held for Investment, Amortized Cost, Total	5,608
Held for Investment, Fair Value, Total	5,560	6,318
Available for Sale, Amortized Cost, Total	50,725
Available for Sale, Fair Value, Total	51,105	67,289
Other debt securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held for Investment, Amortized Cost, Total	0
Held for Investment, Fair Value, Total	0
Available for Sale, Amortized Cost, Total	10,403
Available for Sale, Fair Value, Total	70,797	73,861
Private commercial mortgage backed securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held for Investment, Amortized Cost, Total	0
Held for Investment, Fair Value, Total	0
Available for Sale, Amortized Cost, Total	28,186
Available for Sale, Fair Value, Total	$ 28,219	$ 37,172

SECURITIES - Schedule of Unreal

SECURITIES - Schedule of Unrealized Loss and Fair Value on Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value
Less than 12 months	$ 249,413	$ 664,476
12 months or longer	374,649	198,397
Total	624,062	862,873
Unrealized Losses
Less than 12 months	(2,537)	(13,451)
12 months or longer	(7,279)	(4,992)
Total	(9,816)	(18,443)
Collateralized Loan Obligations [Member]
Fair Value
Less than 12 months	21,998	8,152
12 months or longer	0	51,694
Total	21,998	59,846
Unrealized Losses
Less than 12 months	(18)	(41)
12 months or longer	0	(938)
Total	(18)	(979)
Mortgage-backed securities of U.S. Government Sponsored Entities [Member]
Fair Value
Less than 12 months	152,796	327,759
12 months or longer	109,433	5,387
Total	262,229	333,146
Unrealized Losses
Less than 12 months	(1,963)	(5,991)
12 months or longer	(1,331)	(75)
Total	(3,294)	(6,066)
Collateralized Mortgage Obligations Of US Government Sponsored Entities [Member]
Fair Value
Less than 12 months	51,067	234,175
12 months or longer	225,546	58,912
Total	276,613	293,087
Unrealized Losses
Less than 12 months	(365)	(5,599)
12 months or longer	(5,142)	(2,096)
Total	(5,507)	(7,695)
Commercial mortgage backed securities of U.S. Government Sponsored Entities [Member]
Fair Value
Less than 12 months	3,111	7,934
12 months or longer	0	0
Total	3,111	7,934
Unrealized Losses
Less than 12 months	(10)	(102)
12 months or longer	0	0
Total	(10)	(102)
Private mortgage backed securities [Member]
Fair Value
Less than 12 months	0	0
12 months or longer	0	36,848
Total	0	36,848
Unrealized Losses
Less than 12 months	0	0
12 months or longer	0	(900)
Total	0	(900)
Private collateralized mortgage obligations [Member]
Fair Value
Less than 12 months	0	1,460
12 months or longer	22,003	38,417
Total	22,003	39,877
Unrealized Losses
Less than 12 months	0	0
12 months or longer	(358)	(816)
Total	(358)	(816)
Obligations of state and political subdivisions [Member]
Fair Value
Less than 12 months	11,556	39,321
12 months or longer	5,639	0
Total	17,195	39,321
Unrealized Losses
Less than 12 months	(86)	(895)
12 months or longer	(289)	0
Total	(375)	(895)
Corporate and other debt securities [member]
Fair Value
Less than 12 months	998	33,008
12 months or longer	8,301	0
Total	9,299	33,008
Unrealized Losses
Less than 12 months	0	(517)
12 months or longer	(89)	0
Total	(89)	(517)
Private commercial mortgage backed securities [Member]
Fair Value
Less than 12 months	7,887	12,667
12 months or longer	3,727	7,139
Total	11,614	19,806
Unrealized Losses
Less than 12 months	(95)	(306)
12 months or longer	(70)	(167)
Total	$ (165)	$ (473)

LOANS - Additional Information

LOANS - Additional Information (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Deferred Costs, Noncurrent	$ 12.1	$ 10.6

LOANS - Information Relating to

LOANS - Information Relating to Loans (Details) - USD ($) $ in Thousands		Sep. 30, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES	[1]	$ 3,384,991	$ 2,879,536
Commercial and financial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES		535,457	370,589
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES		184,485	153,945
Construction and land development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES		245,151	160,116
Commercial real estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES		1,478,092	1,357,592
Residential real estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES		941,169	836,787
Other loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES		637	507
Portfolio Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES	[1]	2,837,490	2,425,850
Portfolio Loans [Member] | Commercial and financial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES		476,511	308,731
Portfolio Loans [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES		180,467	152,927
Portfolio Loans [Member] | Construction and land development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES		200,860	137,480
Portfolio Loans [Member] | Commercial real estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES		1,146,359	1,041,915
Portfolio Loans [Member] | Residential real estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES		832,656	784,290
Portfolio Loans [Member] | Other loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES		637	507
PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES	[1]	10,443	12,996
PCI Loans [Member] | Commercial and financial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES		824	941
PCI Loans [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES		0	0
PCI Loans [Member] | Construction and land development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES		116	114
PCI Loans [Member] | Commercial real estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES		8,975	11,257
PCI Loans [Member] | Residential real estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES		528	684
PCI Loans [Member] | Other loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES		0	0
PULs [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES	[1]	537,058	440,690
PULs [Member] | Commercial and financial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES		58,122	60,917
PULs [Member] | Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES		4,018	1,018
PULs [Member] | Construction and land development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES		44,175	22,522
PULs [Member] | Commercial real estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES		322,758	304,420
PULs [Member] | Residential real estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES		107,985	51,813
PULs [Member] | Other loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
NET LOAN BALANCES		$ 0	$ 0
[1]	Net loan balances as of September 30, 2017 and December 31, 2016 include deferred costs of $12.1 million and $10.6 million respectively.

LOANS - Summarizes Changes in T

LOANS - Summarizes Changes in Total Contractually Required Principal and Interest Cash Payments (Details) - Purchased Credit Impaired Loan [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Schedule of Contractually Required Principal And Interest Cash Payments Changes [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	$ 13,132	$ 13,652	$ 12,996	$ 12,109
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	10,443	13,057	10,443	13,057
Accretable yield [Member]
Schedule of Contractually Required Principal And Interest Cash Payments Changes [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	3,265	4,674	3,807	2,610
Additions	0	0	0	2,094
Deletions	0	0	(10)	(15)
Accretion	(357)	(492)	(1,173)	(1,499)
Reclassifications from nonaccretable difference	407	0	691	992
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	3,315	4,182	3,315	4,182
Recorded investment of acquired loans [Member]
Schedule of Contractually Required Principal And Interest Cash Payments Changes [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	13,132	13,652	12,996	12,109
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	10,443	13,057	10,443	13,057
Allowance for loan losses [Member]
Schedule of Contractually Required Principal And Interest Cash Payments Changes [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	0		0	0
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	$ 0	$ 0	$ 0	$ 0

LOANS - Contractual Aging of Re

LOANS - Contractual Aging of Recorded Investment in Past Due Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	$ 14,375	$ 18,071
Current	3,364,985	2,857,695
Total Financing Receivables	3,384,991	2,879,536
Accruing 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	5,395	2,281
Accruing 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	236	1,489
Accruing Greater Than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Portfolio Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	10,877	11,023
Current	2,822,463	2,412,629
Total Financing Receivables	2,837,490	2,425,850
Portfolio Loans [Member] | Commercial and financial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	193	49
Current	474,619	308,652
Total Financing Receivables	476,511	308,731
Portfolio Loans [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	109	170
Current	179,946	152,669
Total Financing Receivables	180,467	152,927
Portfolio Loans [Member] | Commercial real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	1,870	1,784
Current	1,143,843	1,039,882
Total Financing Receivables	1,146,359	1,041,915
Portfolio Loans [Member] | Accruing 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	4,027	1,707
Portfolio Loans [Member] | Accruing 30-59 Days Past Due | Commercial and financial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	1,699	30
Portfolio Loans [Member] | Accruing 30-59 Days Past Due | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	396	29
Portfolio Loans [Member] | Accruing 30-59 Days Past Due | Commercial real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	646	78
Portfolio Loans [Member] | Accruing 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	123	491
Portfolio Loans [Member] | Accruing 60-89 Days Past Due | Commercial and financial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Portfolio Loans [Member] | Accruing 60-89 Days Past Due | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	16	59
Portfolio Loans [Member] | Accruing 60-89 Days Past Due | Commercial real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	171
Portfolio Loans [Member] | Accruing Greater Than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Portfolio Loans [Member] | Accruing Greater Than 90 Days | Commercial and financial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Portfolio Loans [Member] | Accruing Greater Than 90 Days | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Portfolio Loans [Member] | Accruing Greater Than 90 Days | Commercial real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Purchased Unimpaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	2,299	2,763
Current	533,278	436,540
Total Financing Receivables	537,058	440,690
Purchased Unimpaired Loans [Member] | Commercial and financial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	332	197
Current	57,469	60,353
Total Financing Receivables	58,122	60,917
Purchased Unimpaired Loans [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	0	0
Current	4,018	981
Total Financing Receivables	4,018	1,018
Purchased Unimpaired Loans [Member] | Commercial real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	732	1,272
Current	321,166	302,318
Total Financing Receivables	322,758	304,420
Purchased Unimpaired Loans [Member] | Accruing 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	1,368	574
Purchased Unimpaired Loans [Member] | Accruing 30-59 Days Past Due | Commercial and financial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	321	39
Purchased Unimpaired Loans [Member] | Accruing 30-59 Days Past Due | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	37
Purchased Unimpaired Loans [Member] | Accruing 30-59 Days Past Due | Commercial real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	860	345
Purchased Unimpaired Loans [Member] | Accruing 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	113	813
Purchased Unimpaired Loans [Member] | Accruing 60-89 Days Past Due | Commercial and financial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	328
Purchased Unimpaired Loans [Member] | Accruing 60-89 Days Past Due | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Purchased Unimpaired Loans [Member] | Accruing 60-89 Days Past Due | Commercial real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	485
Purchased Unimpaired Loans [Member] | Accruing Greater Than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Purchased Unimpaired Loans [Member] | Accruing Greater Than 90 Days | Commercial and financial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Purchased Unimpaired Loans [Member] | Accruing Greater Than 90 Days | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Purchased Unimpaired Loans [Member] | Accruing Greater Than 90 Days | Commercial real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	1,199	4,285
Current	9,244	8,526
Total Financing Receivables	10,443	12,996
Purchased Credit Impaired Loans [Member] | Commercial and financial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	0	0
Current	824	941
Total Financing Receivables	824	941
Purchased Credit Impaired Loans [Member] | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	0	0
Current	0	0
Total Financing Receivables	0	0
Purchased Credit Impaired Loans [Member] | Commercial real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	1,199	4,285
Current	7,776	6,972
Total Financing Receivables	8,975	11,257
Purchased Credit Impaired Loans [Member] | Accruing 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Purchased Credit Impaired Loans [Member] | Accruing 30-59 Days Past Due | Commercial and financial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Purchased Credit Impaired Loans [Member] | Accruing 30-59 Days Past Due | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Purchased Credit Impaired Loans [Member] | Accruing 30-59 Days Past Due | Commercial real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Purchased Credit Impaired Loans [Member] | Accruing 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	185
Purchased Credit Impaired Loans [Member] | Accruing 60-89 Days Past Due | Commercial and financial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Purchased Credit Impaired Loans [Member] | Accruing 60-89 Days Past Due | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Purchased Credit Impaired Loans [Member] | Accruing 60-89 Days Past Due | Commercial real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Purchased Credit Impaired Loans [Member] | Accruing Greater Than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Purchased Credit Impaired Loans [Member] | Accruing Greater Than 90 Days | Commercial and financial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Purchased Credit Impaired Loans [Member] | Accruing Greater Than 90 Days | Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Purchased Credit Impaired Loans [Member] | Accruing Greater Than 90 Days | Commercial real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Construction and land development [Member] | Portfolio Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	364	438
Current	200,223	137,042
Total Financing Receivables	200,860	137,480
Construction and land development [Member] | Portfolio Loans [Member] | Accruing 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	273	0
Construction and land development [Member] | Portfolio Loans [Member] | Accruing 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Construction and land development [Member] | Portfolio Loans [Member] | Accruing Greater Than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Construction and land development [Member] | Purchased Unimpaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	72	32
Current	44,068	22,490
Total Financing Receivables	44,175	22,522
Construction and land development [Member] | Purchased Unimpaired Loans [Member] | Accruing 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	35	0
Construction and land development [Member] | Purchased Unimpaired Loans [Member] | Accruing 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Construction and land development [Member] | Purchased Unimpaired Loans [Member] | Accruing Greater Than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Construction and land development [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	0	0
Current	116	114
Total Financing Receivables	116	114
Construction and land development [Member] | Purchased Credit Impaired Loans [Member] | Accruing 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Construction and land development [Member] | Purchased Credit Impaired Loans [Member] | Accruing 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Construction and land development [Member] | Purchased Credit Impaired Loans [Member] | Accruing Greater Than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Residential real estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Financing Receivables	941,169	836,787
Residential real estate [Member] | Portfolio Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	8,341	8,582
Current	823,195	773,877
Total Financing Receivables	832,656	784,290
Residential real estate [Member] | Portfolio Loans [Member] | Accruing 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	1,013	1,570
Residential real estate [Member] | Portfolio Loans [Member] | Accruing 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	107	261
Residential real estate [Member] | Portfolio Loans [Member] | Accruing Greater Than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Residential real estate [Member] | Purchased Unimpaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	1,163	1,262
Current	106,557	50,398
Total Financing Receivables	107,985	51,813
Residential real estate [Member] | Purchased Unimpaired Loans [Member] | Accruing 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	152	153
Residential real estate [Member] | Purchased Unimpaired Loans [Member] | Accruing 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	113	0
Residential real estate [Member] | Purchased Unimpaired Loans [Member] | Accruing Greater Than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Residential real estate [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	0	0
Current	528	499
Total Financing Receivables	528	684
Residential real estate [Member] | Purchased Credit Impaired Loans [Member] | Accruing 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Residential real estate [Member] | Purchased Credit Impaired Loans [Member] | Accruing 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	185
Residential real estate [Member] | Purchased Credit Impaired Loans [Member] | Accruing Greater Than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Other [Member] | Portfolio Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	0	0
Current	637	507
Total Financing Receivables	637	507
Other [Member] | Portfolio Loans [Member] | Accruing 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Other [Member] | Portfolio Loans [Member] | Accruing 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Other [Member] | Portfolio Loans [Member] | Accruing Greater Than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Other [Member] | Purchased Unimpaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	0	0
Current	0	0
Total Financing Receivables	0	0
Other [Member] | Purchased Unimpaired Loans [Member] | Accruing 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Other [Member] | Purchased Unimpaired Loans [Member] | Accruing 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Other [Member] | Purchased Unimpaired Loans [Member] | Accruing Greater Than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Other [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	0	0
Current	0	0
Total Financing Receivables	0	0
Other [Member] | Purchased Credit Impaired Loans [Member] | Accruing 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Other [Member] | Purchased Credit Impaired Loans [Member] | Accruing 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	0	0
Other [Member] | Purchased Credit Impaired Loans [Member] | Accruing Greater Than 90 Days
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable, Recorded Investment, Past Due	$ 0	$ 0

LOANS - Risk Category, Class of

LOANS - Risk Category, Class of Loans and Recorded Investment (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 3,384,991	$ 2,879,536
Construction & Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	245,151	160,116
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,478,092	1,357,592
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	941,169	836,787
Commercial and Financial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	535,457	370,589
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	185,122	154,452
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	3,302,442	2,797,806
Pass [Member] | Construction & Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	232,183	148,563
Pass [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,442,538	1,319,696
Pass [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	917,500	811,576
Pass [Member] | Commercial and Financial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	527,190	364,241
Pass [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	183,031	153,730
Special mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	26,571	28,017
Special mention [Member] | Construction & Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	8,844	5,037
Special mention [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	11,534	17,184
Special mention [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,317	1,780
Special mention [Member] | Commercial and Financial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	3,414	3,949
Special mention [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,462	67
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	25,422	17,931
Substandard [Member] | Construction & Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	3,439	5,497
Substandard [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	14,466	7,438
Substandard [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	2,966	2,709
Substandard [Member] | Commercial and Financial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	4,328	2,153
Substandard [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	223	134
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Doubtful [Member] | Construction & Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Doubtful [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Doubtful [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Doubtful [Member] | Commercial and Financial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Doubtful [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	14,375	18,071
Nonaccrual [Member] | Construction & Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	436	470
Nonaccrual [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	3,801	7,341
Nonaccrual [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	9,504	9,844
Nonaccrual [Member] | Commercial and Financial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	525	246
Nonaccrual [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	109	170
restructures [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	4,909	5,434
restructures [Member] | Construction & Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	33	44
restructures [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	4,876	4,988
restructures [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	0	358
restructures [Member] | Commercial and Financial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
restructures [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	0	44
Troubled debt restructures [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	11,272	12,277
Troubled debt restructures [Member] | Construction & Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	216	505
Troubled debt restructures [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	877	945
Troubled debt restructures [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	9,882	10,520
Troubled debt restructures [Member] | Commercial and Financial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Troubled debt restructures [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 297	$ 307

IMPAIRED LOANS AND ALLOWANCE 40

IMPAIRED LOANS AND ALLOWANCE FOR LOAN LOSSES - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructuring Outstanding	$ 16,200,000		$ 16,200,000		$ 17,700,000
Loans and Leases Receivable, Impaired, Interest Income Recognized, Change in Present Value Attributable to Passage of Time	169,000	$ 83,000	282,000	$ 176,000
Nonaccrual loans and loans past due ninety days	14,375,000		14,375,000		18,071,000
Purchased Loans [Member]
Financing Receivable, Modifications [Line Items]
Nonaccrual loans and loans past due ninety days	3,500,000		3,500,000		7,000,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	0		0		0
Nonaccrual [Member]
Financing Receivable, Modifications [Line Items]
Nonaccrual loans and loans past due ninety days	10,900,000		10,900,000		11,000,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	$ 0		0		0
Loans [Member] | Bank shares, Inc [Member]
Financing Receivable, Modifications [Line Items]
Assets, Fair Value Adjustment			$ 15,600,000		$ 13,700,000
Fair value adjustment Percent	2.77%		2.77%		3.11%

IMPAIRED LOANS AND ALLOWANCE 41

IMPAIRED LOANS AND ALLOWANCE FOR LOAN LOSSES - Modified Loans (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2017USD ($)Number	Sep. 30, 2016USD ($)Number
Financing Receivable, Modifications [Line Items]
Number of Contracts | Number	2	6
Pre-Modification Outstanding Recorded Investment	$ 67	$ 1,660
Post-Modification Outstanding Recorded Investment	61	1,489
Valuation Allowance Recorded	$ 6	$ 171
Construction and Land Development [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Number	1
Pre-Modification Outstanding Recorded Investment	$ 52
Post-Modification Outstanding Recorded Investment	46
Valuation Allowance Recorded	$ 6
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Number	1	6
Pre-Modification Outstanding Recorded Investment	$ 15	$ 1,660
Post-Modification Outstanding Recorded Investment	15	1,489
Valuation Allowance Recorded	$ 0	$ 171

IMPAIRED LOANS AND ALLOWANCE 42

IMPAIRED LOANS AND ALLOWANCE FOR LOAN LOSSES - Company's Recorded Investments in Impaired Loans and the Related Valuation Allowances (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Recorded Investment
Total	$ 29,982		$ 29,982		$ 32,718
Unpaid Principal Balance
Total	36,083		36,083		39,157
Related Valuation Allowance
Total	2,070		2,070		2,454
Average Recorded Investment
Total	30,251	$ 30,759	31,205	$ 31,662
Interest Income Recognized
Total	368	352	1,106	1,073
Construction and Land Development [Member]
Recorded Investment
Impaired Loans with No Related Allowance Recorded	397		397		226
Impaired Loans with an Allowance Recorded	289		289		51
Total	686		686		277
Unpaid Principal Balance
Impaired Loans with No Related Allowance Recorded	702		702		321
Impaired Loans with an Allowance Recorded	355		355		51
Total	1,057		1,057		372
Related Valuation Allowance
Impaired Loans with No Related Allowance Recorded	0		0		0
Impaired Loans with an Allowance Recorded	91		91		0
Total	91		91		0
Commercial Real Estate [Member]
Recorded Investment
Impaired Loans with No Related Allowance Recorded	3,431		3,431		3,267
Impaired Loans with an Allowance Recorded	4,931		4,931		6,937
Total	8,362		8,362		10,204
Unpaid Principal Balance
Impaired Loans with No Related Allowance Recorded	4,811		4,811		4,813
Impaired Loans with an Allowance Recorded	4,939		4,939		6,949
Total	9,750		9,750		11,762
Related Valuation Allowance
Impaired Loans with No Related Allowance Recorded	0		0		0
Impaired Loans with an Allowance Recorded	222		222		395
Total	222		222		395
Average Recorded Investment
Total	7,957	8,002	8,622	8,689
Interest Income Recognized
Total	131	95	317	290
Residential Real Estate [Member]
Recorded Investment
Impaired Loans with No Related Allowance Recorded	10,598		10,598		9,706
Impaired Loans with an Allowance Recorded	8,773		8,773		12,332
Total	19,371		19,371		22,038
Unpaid Principal Balance
Impaired Loans with No Related Allowance Recorded	15,283		15,283		14,136
Impaired Loans with an Allowance Recorded	8,970		8,970		12,681
Total	24,253		24,253		26,817
Related Valuation Allowance
Impaired Loans with No Related Allowance Recorded	0		0		0
Impaired Loans with an Allowance Recorded	1,188		1,188		2,059
Total	1,188		1,188		2,059
Average Recorded Investment
Total	20,097	21,384	20,962	21,542
Interest Income Recognized
Total	213	$ 240	707	$ 728
Commercial And Financial [Member]
Recorded Investment
Impaired Loans with No Related Allowance Recorded	29		29		199
Impaired Loans with an Allowance Recorded	1,127		1,127		0
Total	1,156		1,156		199
Unpaid Principal Balance
Impaired Loans with No Related Allowance Recorded	39		39		206
Impaired Loans with an Allowance Recorded	501		501		0
Total	540		540		206
Related Valuation Allowance
Impaired Loans with No Related Allowance Recorded	0		0		0
Impaired Loans with an Allowance Recorded	521		521		0
Total	521		521		0
Consumer [Member]
Recorded Investment
Impaired Loans with No Related Allowance Recorded	117		117		0
Impaired Loans with an Allowance Recorded	290		290		0
Total	407		407		0
Unpaid Principal Balance
Impaired Loans with No Related Allowance Recorded	191		191		0
Impaired Loans with an Allowance Recorded	292		292		0
Total	483		483		0
Related Valuation Allowance
Impaired Loans with No Related Allowance Recorded	0		0		0
Impaired Loans with an Allowance Recorded	48		48		0
Total	$ 48		$ 48		$ 0

IMPAIRED LOANS AND ALLOWANCE 43

IMPAIRED LOANS AND ALLOWANCE FOR LOAN LOSSES - Company's Average Recorded Investments in Impaired Loans and Related Interest Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Average Recorded Investment
Total	$ 30,251	$ 30,759	$ 31,205	$ 31,662
Interest Income Recognized
Total	368	352	1,106	1,073
Commercial Real Estate [Member]
Average Recorded Investment
Impaired Loans with No Related Allowance Recorded	3,004	1,437	2,833	1,854
Impaired Loans with an Allowance Recorded	4,953	6,565	5,789	6,835
Total	7,957	8,002	8,622	8,689
Interest Income Recognized
Impaired Loans with No Related Allowance Recorded	75	31	154	97
Impaired Loans with an Allowance Recorded	56	64	163	193
Total	131	95	317	290
Residential Real Estate [Member]
Average Recorded Investment
Impaired Loans with No Related Allowance Recorded	10,266	9,346	9,933	9,444
Impaired Loans with an Allowance Recorded	9,831	12,038	11,029	12,098
Total	20,097	21,384	20,962	21,542
Interest Income Recognized
Impaired Loans with No Related Allowance Recorded	150	138	447	406
Impaired Loans with an Allowance Recorded	63	102	260	322
Total	213	240	707	728
Construction and Land Development [Member]
Average Recorded Investment
Impaired Loans with No Related Allowance Recorded	517	208	460	188
Impaired Loans with an Allowance Recorded	333	609	242	671
Total	850	817	702	859
Interest Income Recognized
Impaired Loans with No Related Allowance Recorded	13	3	35	11
Impaired Loans with an Allowance Recorded	2	7	8	20
Total	15	10	43	31
Commercial And Financial [Member]
Average Recorded Investment
Impaired Loans with No Related Allowance Recorded	244	16	183	16
Impaired Loans with an Allowance Recorded	646	0	378	0
Total	890	16	561	16
Interest Income Recognized
Impaired Loans with No Related Allowance Recorded	1	0	3	0
Impaired Loans with an Allowance Recorded	2	0	14	0
Total	3	0	17	0
Consumer Portfolio Segment [Member]
Average Recorded Investment
Impaired Loans with No Related Allowance Recorded	124	157	111	193
Impaired Loans with an Allowance Recorded	333	383	247	363
Total	457	540	358	556
Interest Income Recognized
Impaired Loans with No Related Allowance Recorded	3	3	10	10
Impaired Loans with an Allowance Recorded	3	4	12	14
Total	$ 6	$ 7	$ 22	$ 24

IMPAIRED LOANS AND ALLOWANCE 44

IMPAIRED LOANS AND ALLOWANCE FOR LOAN LOSSES - Activity in Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Allowance for Loan Losses:
Beginning Balance	$ 26,000	$ 20,725	$ 23,400	$ 19,128
Provision for Loan Losses	680	550	3,385	1,411
Charge-Offs	(1,310)	(296)	(2,416)	(697)
Recoveries	1,031	1,788	2,145	3,018
TDR Valuation Adjustments	(169)	(83)	(282)	(176)
Ending Balance	26,232	22,684	26,232	22,684
Construction and Land Development [Member]
Allowance for Loan Losses:
Beginning Balance	1,574	1,160	1,219	1,151
Provision for Loan Losses	(690)	50	(496)	(125)
Charge-Offs	0	0	0	0
Recoveries	728	25	891	214
TDR Valuation Adjustments	0	(2)	(2)	(7)
Ending Balance	1,612	1,233	1,612	1,233
Commercial Real Estate [Member]
Allowance for Loan Losses:
Beginning Balance	9,923	7,192	9,273	6,756
Provision for Loan Losses	62	1,505	410	2,025
Charge-Offs	(239)	(78)	(341)	(209)
Recoveries	175	169	613	271
TDR Valuation Adjustments	(15)	(55)	(49)	(110)
Ending Balance	9,906	8,733	9,906	8,733
Residential Real Estate [Member]
Allowance for Loan Losses:
Beginning Balance	7,423	8,299	7,483	8,057
Provision for Loan Losses	116	(637)	90	(626)
Charge-Offs	(296)	0	(482)	(135)
Recoveries	39	272	266	669
TDR Valuation Adjustments	(148)	(25)	(223)	(56)
Ending Balance	7,134	7,909	7,134	7,909
Commercial And Financial [Member]
Allowance for Loan Losses:
Beginning Balance	5,460	2,591	3,636	2,042
Provision for Loan Losses	834	(633)	3,036	(524)
Charge-Offs	(333)	(200)	(837)	(255)
Recoveries	28	1,278	154	1,773
TDR Valuation Adjustments	0	0	0	0
Ending Balance	5,989	3,036	5,989	3,036
Consumer [Member]
Allowance for Loan Losses:
Beginning Balance	1,620	1,483	1,789	1,122
Provision for Loan Losses	358	265	345	661
Charge-Offs	(442)	(18)	(756)	(98)
Recoveries	61	44	221	91
TDR Valuation Adjustments	(6)	(1)	(8)	(3)
Ending Balance	$ 1,591	$ 1,773	$ 1,591	$ 1,773

IMPAIRED LOANS AND ALLOWANCE 45

IMPAIRED LOANS AND ALLOWANCE FOR LOAN LOSSES - Loan Portfolio and Related Allowance (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Carrying Value
Individually Evaluated for Impairment	$ 29,982	$ 32,718
Collectively Evaluated for Impairment	24,162	20,946
Total	3,374,548	2,866,540
Associated Allowance
Individually Evaluated for Impairment	2,070	2,454
Collectively Evaluated for Impairment	3,344,566	2,833,822
Total	26,232	23,400
PCI Loans [Member]
Carrying Value
Individually Evaluated for Impairment	10,443	12,996
Associated Allowance
Individually Evaluated for Impairment	0	0
Construction and Land Development [Member]
Carrying Value
Individually Evaluated for Impairment	686	277
Collectively Evaluated for Impairment	1,521	1,219
Total	245,035	160,116
Associated Allowance
Individually Evaluated for Impairment	91	0
Collectively Evaluated for Impairment	244,349	159,839
Total	1,612	1,219
Construction and Land Development [Member] | PCI Loans [Member]
Carrying Value
Individually Evaluated for Impairment	116	114
Associated Allowance
Individually Evaluated for Impairment	0	0
Commercial Real Estate [Member]
Carrying Value
Individually Evaluated for Impairment	8,362	10,204
Collectively Evaluated for Impairment	9,684	8,878
Total	1,469,117	1,346,036
Associated Allowance
Individually Evaluated for Impairment	222	395
Collectively Evaluated for Impairment	1,460,755	1,335,832
Total	9,906	9,273
Commercial Real Estate [Member] | PCI Loans [Member]
Carrying Value
Individually Evaluated for Impairment	8,975	11,257
Associated Allowance
Individually Evaluated for Impairment	0	0
Residential Real Estate [Member]
Carrying Value
Individually Evaluated for Impairment	19,371	22,038
Collectively Evaluated for Impairment	5,946	5,424
Total	940,641	836,288
Associated Allowance
Individually Evaluated for Impairment	1,188	2,059
Collectively Evaluated for Impairment	921,270	814,250
Total	7,134	7,483
Residential Real Estate [Member] | PCI Loans [Member]
Carrying Value
Individually Evaluated for Impairment	528	684
Associated Allowance
Individually Evaluated for Impairment	0	0
Commercial And Financial [Member]
Carrying Value
Individually Evaluated for Impairment	1,156	199
Collectively Evaluated for Impairment	5,468	3,636
Total	534,633	369,648
Associated Allowance
Individually Evaluated for Impairment	521	0
Collectively Evaluated for Impairment	533,477	369,449
Total	5,989	3,636
Commercial And Financial [Member] | PCI Loans [Member]
Carrying Value
Individually Evaluated for Impairment	824	941
Associated Allowance
Individually Evaluated for Impairment	0	0
Consumer [Member]
Carrying Value
Individually Evaluated for Impairment	407	0
Collectively Evaluated for Impairment	1,543	1,789
Total	185,122	154,452
Associated Allowance
Individually Evaluated for Impairment	48	0
Collectively Evaluated for Impairment	184,715	154,452
Total	1,591	1,789
Consumer [Member] | PCI Loans [Member]
Carrying Value
Individually Evaluated for Impairment	0	0
Associated Allowance
Individually Evaluated for Impairment	$ 0	$ 0

SECURITIES SOLD UNDER AGREEME46

SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE - Schedule Of Securities Financing Transactions (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Mortgage-backed securities of U.S. Government Sponsored Entities [Member]
Securities Financing Transaction [Line Items]
Securities Sold under Agreements to Repurchase, Fair Value of Collateral	$ 142,153	$ 204,202

NONINTEREST INCOME AND EXPENS47

NONINTEREST INCOME AND EXPENSES - Summary of Noninterest Income and Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Noninterest income
Service charges on deposits	$ 2,626	$ 2,698	$ 7,483	$ 7,057
Trust income	967	820	2,764	2,464
Mortgage banking fees	2,138	1,885	4,962	4,248
Brokerage commissions and fees	351	463	1,079	1,564
Marine finance fees	137	138	597	558
Interchange income	2,582	2,306	7,747	6,893
Other deposit-based EFT fees	100	109	354	352
BOLI income	836	382	2,326	1,602
Other income	1,744	963	4,541	2,767
Noninterest Income	11,481	9,764	31,853	27,505
Securities gains (losses), net	(47)	225	(26)	361
TOTAL	11,434	9,989	31,827	27,866
Noninterest expense
Salaries and wages	15,627	14,337	49,371	41,620
Employee benefits	2,917	2,425	8,920	7,428
Outsourced data processing costs	3,231	3,198	9,956	10,440
Telephone/data lines	573	539	1,753	1,606
Occupancy	2,447	3,675	10,025	10,292
Furniture and equipment	1,191	1,228	4,261	3,509
Marketing	1,298	780	3,294	2,786
Legal and professional fees	2,560	2,213	7,968	7,226
FDIC assessments	548	517	1,768	1,704
Amortization of intangibles	839	728	2,397	1,767
Asset dispositions expense	117	219	306	469
Net loss (gain) on other real estate owned and repossessed assets	(414)	(96)	(599)	(348)
Early redemption cost for Federal Home Loan Bank borrowings	0	0	0	1,777
Other	3,427	3,672	11,312	10,308
TOTAL	$ 34,361	$ 33,435	$ 110,732	$ 100,584

EQUITY CAPITAL - Additional Inf

EQUITY CAPITAL - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended	9 Months Ended
	Feb. 21, 2017	Sep. 30, 2017	Sep. 30, 2016
Class of Stock [Line Items]
Proceeds from Issuance of Common Stock	$ 55,700	$ 55,641	$ 0
Tier One Risk Based Capital Required to be Well Capitalized to Risk Weighted Assets		6.50%
Stock Issued During Period, Shares, New Issues	2,702,500
CapGen Capital Group III LP [Member]
Class of Stock [Line Items]
Sale of Stock, Number of Shares Issued in Transaction	6,210,000

FAIR VALUE - Additional Informa

FAIR VALUE - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
		Sep. 30, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	[1]		$ 400
Capitalization Rates Utilized To Determine Fair Value Of Underlying Collateral Averaged Percentage		7.70%	7.70%
Loans and Leases Receivable, Allowance		$ 26,232	$ 26,232	$ 26,000	$ 23,400	$ 22,684	$ 20,725	$ 19,128
Loans Receivable [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3			800
Other Real Estate Owned And Other Reductions		600	600
Other Real Estate Owned [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Real Estate Revenue			4,200
Loans Receivable, Fair Value Disclosure		4,200	4,200		4,100
Loans and Leases Receivable, Allowance		1,400	1,400		$ 400
Other Real Estate, Disposals			4,400
Other Real Estate, Improvements		$ 6,000	$ 1,200
[1]	See Note D for further detail of fair value of individual investment categories.

FAIR VALUE - Fair Value Measure

FAIR VALUE - Fair Value Measurements for Items Measured at Fair Value (Details) - USD ($) $ in Thousands		Sep. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale		$ 29,447	$ 15,332
Other real estate owned		7,142	9,949
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities	[1]	996,799	950,503
Loans held for sale	[2]	29,447	15,332
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities	[1]	100	100
Loans held for sale	[2]	0	0
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities	[1]	996,699	950,403
Loans held for sale	[2]	29,447	15,332
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities	[1]	0	0
Loans held for sale	[2]	0	0
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	[3]	4,160	4,120
Other real estate owned	[4]	7,142	9,949
Fair Value, Measurements, Nonrecurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	[3]	0	0
Other real estate owned	[4]	0	0
Fair Value, Measurements, Nonrecurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	[3]	2,973	3,170
Other real estate owned	[4]	0	0
Fair Value, Measurements, Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	[3]	1,187	950
Other real estate owned	[4]	$ 7,142	$ 9,949
[1]	See Note D for further detail of fair value of individual investment categories.
[2]	Recurring fair value basis determined using observable market data.
[3]	See Note F. Nonrecurring fair value adjustments to loans identified as impaired reflect full or partial write-downs that are based on the loan’s observable market price or current appraised value of the collateral in accordance with ASC 310.
[4]	Fair value is measured on a nonrecurring basis in accordance with ASC 360.

FAIR VALUE - Summary of Carryin

FAIR VALUE - Summary of Carrying Value and Fair Value of Company's Financial Instruments (Details) - USD ($) $ in Thousands		Sep. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity		$ 374,773	$ 372,498
Loans, net		3,358,759	2,856,136
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity	[1]	0	0
Time deposits with other banks		0
Loans, net		0	0
Deposit liabilities		0	0
Subordinated debt		0	0
Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity	[1]	374,961	369,881
Time deposits with other banks		0
Loans, net		0	0
Deposit liabilities		0	0
Subordinated debt		55,072	54,908
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity	[1]	0	0
Time deposits with other banks		14,557
Loans, net		3,328,023	2,840,993
Deposit liabilities		4,110,324	3,523,322
Subordinated debt		0	0
Carrying Amount [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities held to maturity	[1]	374,773	372,498
Time deposits with other banks		14,591
Loans, net		3,345,978	2,852,016
Deposit liabilities		4,112,600	3,523,245
Subordinated debt		$ 70,451	$ 70,241
[1]	See Note D for further detail of fair value of individual investment categories.

FAIR VALUE - fair value of cont

FAIR VALUE - fair value of contractual balance and gains or losses (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Aggregate fair value	$ 29,447	$ 15,332
Contractual balance	28,782	14,904
Gains	$ 665	$ 428

BUSINESS COMBINATIONS - Additio

BUSINESS COMBINATIONS - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	Nov. 03, 2017	Apr. 07, 2017	Mar. 11, 2016	Oct. 20, 2017	Jun. 30, 2017	Sep. 30, 2017	Jun. 03, 2016
Business Acquisition [Line Items]
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Deposit Premium Percentage							3.00%
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Loan Held For Sale							$ 314
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable							$ 63
Business Acquisition Intangible Assets Expected Tax Deductible Amount						$ 13
Business Acquisition Intangible Assets Tax Deductible Period						15 years
Business Loan Premium							0.50%
Payments for Merger Related Costs					$ 4.3
Subsequent Event [Member]
Business Acquisition [Line Items]
Share Price	$ 0
Floridian Financial Group [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets			$ 417
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Noncurrent Liabilities Deposits			337
Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Noncurrent Assets Loans			266
Business Acquisition, Equity Interest Issued or Issuable, Description						Under the terms of the definitive agreement, Floridian shareholders received, at their election, (i) the combination of $4.29 in cash and 0.5291 shares of Seacoast common stock, (ii) $12.25 in cash, or (iii) 0.8140 shares of Seacoast common stock, subject to a customary proration mechanism so that the aggregate consideration mix equaled 35% cash and 65% Seacoast shares (based on Seacoast’s closing price of $15.47 per share on March 11, 2016).
Business Acquisition, Percentage of Voting Interests Acquired						100.00%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount			$ 32
Gulf Shore Banc shares Inc [Member]
Business Acquisition [Line Items]
Business Acquisition, Equity Interest Issued or Issuable, Description						Under the terms of the definitive agreement, GulfShore shareholders received, for each share of Gulfshore common stock, the combination of $1.47 in cash and 0.4807 shares of Seacoast common stock (based on Seacoast’s closing price of $23.94 per share on April 7, 2017).
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount		$ 37
Gulf Shore Banc shares Inc [Member] | Common Stock [Member]
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired						100.00%
Palm Beach Community Bank [Member] | Subsequent Event [Member]
Business Acquisition [Line Items]
Business Acquisition, Equity Interest Issued or Issuable, Description	Under the terms of the definitive agreement, PBCB shareholders received, for each share of PBCB stock, the combination of $6.26 in cash and 0.9240 shares of Seacoast common stock.
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
NorthStar Bank [Member] | Subsequent Event [Member]
Business Acquisition [Line Items]
Business Acquisition, Equity Interest Issued or Issuable, Description				Under the terms of the definitive agreement, NSBC shareholders received, for each share of NSBC common stock, the combination of $2.40 in cash and 0.5605 shares of Seacoast common stock
Business Acquisition, Percentage of Voting Interests Acquired				100.00%

BUSINESS COMBINATIONS - Purchas

BUSINESS COMBINATIONS - Purchase Price (Details)	Nov. 03, 2017USD ($)$ / sharesshares	Apr. 07, 2017USD ($)$ / sharesshares	Mar. 11, 2016USD ($)$ / sharesshares	Oct. 20, 2017USD ($)$ / sharesshares	Sep. 30, 2017shares	Dec. 31, 2016shares
Business Acquisition [Line Items]
Number of NorthStar Banking Corporation common shares outstanding | shares					43,512,179	38,021,835
Floridian Financial Group [Member]
Business Acquisition [Line Items]
Shares exchanged for cash			$ 26,699,000
Number of GulfShore Bancshares, Inc. common shares outstanding | shares			6,222,119
Per share exchange ratio			0.5289
Number of shares of Seacoast common stock issued | shares			3,291,066
Multiplied by common stock price per share | $ / shares			$ 15.47
Value of common stock issued			$ 50,912,791
Total purchase price			$ 77,611,791
Gulf Shore Banc shares Inc [Member]
Business Acquisition [Line Items]
Shares exchanged for cash		$ 8,033,999
Number of GulfShore Bancshares, Inc. common shares outstanding | shares		5,464,308
Per share exchange ratio		0.4807
Number of shares of Seacoast common stock issued | shares		2,626,693
Multiplied by common stock price per share | $ / shares		$ 23.94
Value of common stock issued		$ 62,883,030
Total purchase price		$ 70,917,029
NorthStar Bank [Member] | Subsequent Event [Member]
Business Acquisition [Line Items]
Shares exchanged for cash				$ 4,700,129
Number of NorthStar Banking Corporation common shares outstanding | shares				1,958,387
Per share exchange ratio				0.5605
Number of shares of Seacoast common stock issued | shares				1,097,675
Multiplied by common stock price per share | $ / shares				$ 24.92
Value of common stock issued				$ 27,354,061
Cash paid for NorthStar Banking vested Corporation stock options				801,168
Total purchase price				$ 32,855,358
Palm Beach Community Bank [Member] | Subsequent Event [Member]
Business Acquisition [Line Items]
Shares exchanged for cash	$ 15,693,929
Number of NorthStar Banking Corporation common shares outstanding | shares	2,506,867
Per share exchange ratio	0.9240
Number of shares of Seacoast common stock issued | shares	2,316,345
Multiplied by common stock price per share | $ / shares	$ 24.31
Value of common stock issued	$ 56,310,350
Total purchase price	$ 72,004,279

BUSINESS COMBINATIONS - fair va

BUSINESS COMBINATIONS - fair value of the assets purchased, including goodwill, and liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Apr. 07, 2017	Dec. 31, 2016	Jun. 03, 2016	Mar. 11, 2016
Assets:
Loans, net				$ 314,000
Goodwill	$ 101,747		$ 64,649
Liabilities:
Deposits				63,000
Measurement Period Adjustments [Member]
Assets:
Total assets acquired				0
Liabilities:
Total liabilities assumed				0	$ 0
Scenario, Previously Reported [Member]
Assets:
Total assets acquired				314,300
Liabilities:
Total liabilities assumed				314,300
Restatement Adjustment [Member]
Assets:
Total assets acquired				314,300	417,444
Liabilities:
Total liabilities assumed				314,300	339,833
Bank shares, Inc [Member] | Measurement Period Adjustments [Member]
Assets:
Cash					0
Investment securities					95
Loans, net					(2,112)
Fixed assets					(628)
Core deposit intangibles					0
Goodwill					1,647
Other assets					998
Total assets acquired					0
Liabilities:
Deposits					0
Other liabilities					0
Bank shares, Inc [Member] | Scenario, Previously Reported [Member]
Assets:
Cash					28,243
Investment securities					66,912
Loans, net					268,249
Fixed assets					7,801
Core deposit intangibles					3,375
Goodwill					29,985
Other assets					12,879
Total assets acquired					417,444
Liabilities:
Deposits					337,341
Other liabilities					2,492
Total liabilities assumed					339,833
Bank shares, Inc [Member] | Restatement Adjustment [Member]
Assets:
Cash					28,243
Investment securities					67,007
Loans, net					266,137
Fixed assets					7,173
Core deposit intangibles					3,375
Goodwill					31,632
Other assets					13,877
Liabilities:
Deposits					337,341
Other liabilities					$ 2,492
BMO Harris Bank [Member] | Measurement Period Adjustments [Member]
Assets:
Cash				0
Loans, net				0
Fixed assets				0
Core deposit intangibles				(135)
Goodwill				163
Other assets				(28)
Liabilities:
Deposits				0
Other liabilities				0
BMO Harris Bank [Member] | Scenario, Previously Reported [Member]
Assets:
Cash				234,094
Loans, net				62,671
Fixed assets				3,715
Core deposit intangibles				5,223
Goodwill				7,645
Other assets				952
Liabilities:
Deposits				314,248
Other liabilities				52
BMO Harris Bank [Member] | Restatement Adjustment [Member]
Assets:
Cash				234,094
Loans, net				62,671
Fixed assets				3,715
Core deposit intangibles				5,088
Goodwill				7,808
Other assets				924
Liabilities:
Deposits				314,248
Other liabilities				$ 52
Gulf Shore Banc shares Inc [Member] | Measurement Period Adjustments [Member]
Assets:
Cash		$ 0
Investment securities		0
Loans, net		(8)
Fixed assets		0
Other real estate owned		0
Core deposit intangibles		0
Goodwill		8
Other assets		0
Total assets acquired		0
Liabilities:
Deposits		0
Other liabilities		0
Total liabilities assumed		0
Gulf Shore Banc shares Inc [Member] | Scenario, Previously Reported [Member]
Assets:
Cash		55,540
Investment securities		316
Loans, net		250,884
Fixed assets		1,307
Other real estate owned		13
Core deposit intangibles		3,927
Goodwill		37,090
Other assets		8,572
Total assets acquired		357,649
Liabilities:
Deposits		285,350
Other liabilities		1,382
Total liabilities assumed		286,732
Gulf Shore Banc shares Inc [Member] | Restatement Adjustment [Member]
Assets:
Cash		55,540
Investment securities		316
Loans, net		250,876
Fixed assets		1,307
Other real estate owned		13
Core deposit intangibles		3,927
Goodwill		37,098
Other assets		8,572
Total assets acquired		357,649
Liabilities:
Deposits		285,350
Other liabilities		1,382
Total liabilities assumed		$ 286,732

BUSINESS COMBINATIONS - fair 56

BUSINESS COMBINATIONS - fair value of acquired loans (Details) - USD ($) $ in Thousands	Apr. 07, 2017	Jun. 03, 2016	Mar. 11, 2016
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net			$ 280,022
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value			266,137
Commercial Real Estate [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net			172,531
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value			167,105
Commercial Loan [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net			39,070
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value			37,804
Single Family Residential Real Estate [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net			38,304
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value			37,367
Construction Development Land [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net			20,546
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value			18,108
Consumer And Other Loans [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net			3,385
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value			3,110
Purchased Credit Impaired [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net			6,186
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value			$ 2,643
BMO Harris Bank [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	$ 256,876	$ 64,043
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value	250,876	62,671
BMO Harris Bank [Member] | Commercial Real Estate [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	106,729	31,564
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value	103,905	31,200
BMO Harris Bank [Member] | Commercial Loan [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	32,137	32,479
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value	32,247	31,471
BMO Harris Bank [Member] | Single Family Residential Real Estate [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	101,281
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value	99,598
BMO Harris Bank [Member] | Construction Development Land [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	13,175
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value	11,653
BMO Harris Bank [Member] | Consumer And Other Loans [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	3,554
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value	3,473
BMO Harris Bank [Member] | Purchased Credit Impaired [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	0	0
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value	$ 0	$ 0

BUSINESS COMBINATIONS - purch57

BUSINESS COMBINATIONS - purchased credit impaired loans (Details) $ in Thousands	Mar. 11, 2016USD ($)
Total purchased credit-impaired loan acquired	$ 266,137
Floridian Financial Group [Member]
Contractually required principal and interest	8,031
Non-accretable difference	(4,820)
Cash flows expected to be collected	3,211
Accretable yield	(568)
Total purchased credit-impaired loan acquired	$ 2,643

BUSINESS COMBINATIONS - Pro-for

BUSINESS COMBINATIONS - Pro-forma information (Details) - Gulf Shore Banc shares Inc [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Business Acquisition [Line Items]
Net interest income	$ 40,102	$ 131,178	$ 109,738
Net income	$ 9,798	$ 30,884	$ 20,364
EPS - basic (in dollars per share)	$ 0.24	$ 0.73	$ 0.52
EPS - diluted (in dollars per share)	$ 0.24	$ 0.72	$ 0.51