Seacoast Banking Corporation of Florida (SBCF) 10-Q 12 Nov 19 2019 Q3 Quarterly report Financial data

Cover Page

Cover Page	9 Months Ended
	Sep. 30, 2019shares
Cover page.
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2019
Document Transition Report	false
Entity File Number	0-13660
Entity Registrant Name	Seacoast Banking Corporation of Florida
Entity Incorporation, State or Country Code	FL
Entity Tax Identification Number	59-2260678
Entity Address, Address Line One	815 COLORADO AVENUE,
Entity Address, City or Town	STUART
Entity Address, State or Province	FL
Entity Address, Postal Zip Code	34994
City Area Code	(772)
Local Phone Number	287-4000
Title of 12(b) Security	Common Stock
Trading Symbol	SBCF
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding	51,482,029
Amendment Flag	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Entity Central Index Key	0000730708
Current Fiscal Year End Date	--12-31

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Interest and fees on loans	$ 63,092	$ 48,713	$ 187,667	$ 140,489
Interest and dividends on securities	8,933	9,807	27,279	29,016
Interest on interest bearing deposits and other investments	800	634	2,591	1,835
Total Interest Income	72,825	59,154	217,537	171,340
Interest on deposits	4,334	2,097	13,032	5,623
Interest on time certificates	6,009	2,975	16,692	7,783
Interest on borrowed money	1,534	2,520	5,955	6,403
Total Interest Expense	11,877	7,592	35,679	19,809
Net Interest Income	60,948	51,562	181,858	151,531
Provision for loan losses	2,251	5,774	6,199	9,388
Net Interest Income after Provision for Loan Losses	58,697	45,788	175,659	142,143
Noninterest income
Other income	14,790	12,339	41,678	37,506
Securities losses, net	(847)	(48)	(1,322)	(198)
Total Noninterest Income (Note I)	13,943	12,291	40,356	37,308
Total Noninterest Expenses (Note I)	38,583	37,399	122,682	112,809
Income Before Income Taxes	34,057	20,680	93,333	66,642
Provision for income taxes	8,452	4,358	21,770	15,329
Net Income	$ 25,605	$ 16,322	$ 71,563	$ 51,313
Share Data
Net income per share of common stock - diluted (in dollars per share)	$ 0.49	$ 0.34	$ 1.38	$ 1.07
Net income per share of common stock - basic (in dollars per share)	$ 0.50	$ 0.35	$ 1.39	$ 1.09
Average common shares outstanding - diluted (in shares)	51,935	48,029	51,996	47,903
Average common shares outstanding - basic (in shares)	51,473	47,205	51,426	47,108

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net Income	$ 25,605	$ 16,322	$ 71,563	$ 51,313
Other comprehensive income (loss):
Unrealized gains (losses) on securities available for sale	5,555	(3,548)	29,864	(20,564)
Reclassification of unrealized losses on securities transferred to available for sale upon adoption of new accounting pronouncement	0	0	(730)	0
Amortization of unrealized losses on securities transferred to held to maturity, net	59	108	202	442
Reclassification adjustment for losses included in net income	895	0	1,538	0
(Provision) benefit for income taxes	(1,468)	919	(7,503)	5,358
Total other comprehensive income (loss)	5,041	(2,521)	23,371	(14,764)
Comprehensive Income	$ 30,646	$ 13,801	$ 94,934	$ 36,549

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Assets
Cash and due from banks	$ 106,349	$ 92,242
Interest bearing deposits with other banks	25,911	23,709
Total cash and cash equivalents	132,260	115,951
Time deposits with other banks	4,579	8,243
Debt securities:
Securities available for sale (at fair value)	920,811	865,831
Securities held to maturity (fair value $276,069 at September 30, 2019 and $349,895 at December 31, 2018)	273,644	357,949
Total debt securities	1,194,455	1,223,780
Loans held for sale (at fair value)	26,768	11,873
Loans	4,986,289	4,825,214
Less: Allowance for loan losses	(33,605)	(32,423)
Loans, net of allowance for loan losses	4,952,684	4,792,791
Bank premises and equipment, net	67,873	71,024
Other real estate owned	13,593	12,802
Goodwill	205,286	204,753
Other intangible assets, net	21,318	25,977
Bank owned life insurance	125,277	123,394
Net deferred tax assets	17,168	28,954
Other assets	129,384	128,117
Total Assets	6,890,645	6,747,659
Liabilities
Deposits	5,673,141	5,177,240
Securities sold under agreements to repurchase, maturing within 30 days	70,414	214,323
Federal Home Loan Bank (FHLB) borrowings	50,000	380,000
Subordinated debt	71,014	70,804
Other liabilities	63,398	41,025
Total Liabilities	5,927,967	5,883,392
Shareholders' Equity
Common stock, par value $0.10 per share, authorized 120,000,000 shares, issued 51,730,773 and outstanding 51,482,029 at September 30, 2019, and authorized 120,000,000, issued 51,514,734 and outstanding 51,361,079 shares at December 31, 2018	5,148	5,136
Other shareholders' equity	957,530	859,131
Total Shareholders' Equity	962,678	864,267
Total Liabilities and Shareholders' Equity	$ 6,890,645	$ 6,747,659

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Held to maturity, fair value	$ 276,069	$ 349,895
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized (in shares)	120,000,000	120,000,000
Common stock, shares issued (in shares)	51,730,773	51,514,734
Common stock, shares outstanding (in shares)	51,482,029	51,361,079

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash Flows from Operating Activities
Net income	$ 71,563	$ 51,313
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	4,899	4,691
Amortization of premiums and discounts on securities, net	1,876	2,567
Amortization of operating lease right-of-use assets	3,068	0
Other amortization and accretion, net	(1,914)	185
Stock based compensation	5,773	5,603
Origination of loans designated for sale	(234,130)	(225,929)
Sale of loans designated for sale	227,711	239,316
Provision for loan losses	6,199	9,388
Deferred income taxes	4,442	5,675
Losses on sale of securities	1,538	0
Gains on sale of loans	(6,683)	(7,752)
Gains on sale and write-downs of other real estate owned	(279)	(12)
Losses on disposition of fixed assets	506	216
Bank owned life insurance death benefits	(956)	0
Changes in operating assets and liabilities, net of effects from acquired companies:
Net increase in other assets	(1,585)	(4,052)
Net (decrease) increase in other liabilities	(6,721)	3,644
Net cash provided by operating activities	75,307	84,853
Cash Flows from Investing Activities
Maturities and repayments of debt securities available for sale	67,951	107,728
Maturities and repayments of debt securities held to maturity	30,382	48,945
Proceeds from sale of debt securities available for sale	122,906	0
Purchases of debt securities available for sale	(164,451)	(104,650)
Maturities of time deposits with other banks	3,664	2,740
Net new loans and principal repayments	(48,600)	(225,570)
Purchases of loans held for investment	(117,853)	(19,541)
Proceeds from sale of other real estate owned	5,153	9,260
Proceeds from sale of FHLB and Federal Reserve Bank Stock	46,283	28,751
Purchase of FHLB and Federal Reserve Bank Stock	(36,093)	(33,681)
Proceeds from sale of Visa Class B Stock	0	21,333
Proceeds from bank owned life insurance	14,218	4,232
Additions to bank premises and equipment	(2,254)	(3,557)
Net cash used in investing activities	(78,694)	(164,010)
Cash Flows from Financing Activities
Net increase in deposits	495,901	50,790
Net decrease in federal funds purchased and repurchase agreements	(143,909)	(27,059)
Net decrease in FHLB borrowings with original maturities of three months or less	(267,000)	(10,000)
Repayments of FHLB borrowings with original maturities of more than three months	(63,000)	0
Proceeds from FHLB borrowings with original maturities of more than three months	0	60,000
Stock based employee benefit plans	(2,296)	1,016
Dividends paid	0	0
Net cash provided by financing activities	19,696	74,747
Net increase (decrease) in cash and cash equivalents	16,309	(4,410)
Cash and cash equivalents at beginning of period	115,951	109,504
Cash and cash equivalents at end of period	132,260	105,094
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	35,255	18,952
Cash paid during the period for taxes	13,500	9,200
New operating lease right-of-use assets	29,430	0
New operating lease liabilities	33,756	0
Supplemental disclosure of non cash investing activities:
Transfer of debt securities from held to maturity to available for sale	52,796	0
Transfers from loans to other real estate owned	5,665	4,271
Transfers from bank premises to other real estate owned	$ 0	$ 2,052

CONSOLIDATED STATEMENTS OF SHAR

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2017		46,918
Beginning balance at Dec. 31, 2017	$ 689,664	$ 4,693	$ 661,632	$ 29,914	$ (2,359)	$ (4,216)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	36,549			51,313		(14,764)
Stock based compensation expense (in shares)		32
Stock based compensation expense	5,602		5,602
Common stock transactions related to stock based employee benefit plans (in shares)		(2)
Common stock transactions related to stock based employee benefit plans	(497)	$ 20	(22)		(495)
Common stock issued for stock options (in shares)		322
Common stock issued for stock options	1,513	$ 14	1,499
Increase (decrease) in shares during period (in shares)		352
Increase (decrease) in stockholders' equity during period	43,167	$ 34	7,079	51,198	(495)	(14,649)
Ending balance (in shares) at Sep. 30, 2018		47,270
Ending balance at Sep. 30, 2018	732,831	$ 4,727	668,711	81,112	(2,854)	(18,865)
Beginning balance (in shares) at Jun. 30, 2018		47,164
Beginning balance at Jun. 30, 2018	716,163	$ 4,716	665,885	64,790	(2,884)	(16,344)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	13,801			16,322		(2,521)
Stock based compensation expense (in shares)		32
Stock based compensation expense	1,980		1,980
Common stock transactions related to stock based employee benefit plans (in shares)		1
Common stock transactions related to stock based employee benefit plans	24	$ 3	(9)		30
Common stock issued for stock options (in shares)		73
Common stock issued for stock options	863	$ 8	855
Increase (decrease) in shares during period (in shares)		106
Increase (decrease) in stockholders' equity during period	16,668	$ 11	2,826	16,322	30	(2,521)
Ending balance (in shares) at Sep. 30, 2018		47,270
Ending balance at Sep. 30, 2018	732,831	$ 4,727	668,711	81,112	(2,854)	(18,865)
Beginning balance (in shares) at Dec. 31, 2018		51,361
Beginning balance at Dec. 31, 2018	864,267	$ 5,136	778,501	97,074	(3,384)	(13,060)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	94,934			71,563		23,371
Stock based compensation expense (in shares)		30
Stock based compensation expense	5,773		5,773
Common stock transactions related to stock based employee benefit plans (in shares)		62
Common stock transactions related to stock based employee benefit plans	(2,724)	$ 9	(38)		(2,695)
Common stock issued for stock options (in shares)		29
Common stock issued for stock options	428	$ 3	425
Increase (decrease) in shares during period (in shares)		121
Increase (decrease) in stockholders' equity during period	98,411	$ 12	6,160	71,563	(2,695)	23,371
Ending balance (in shares) at Sep. 30, 2019		51,482
Ending balance at Sep. 30, 2019	962,678	$ 5,148	784,661	168,637	(6,079)	10,311
Beginning balance (in shares) at Jun. 30, 2019		51,461
Beginning balance at Jun. 30, 2019	930,239	$ 5,146	782,928	143,032	(6,137)	5,270
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income	30,646			25,605		5,041
Stock based compensation expense (in shares)		30
Stock based compensation expense	1,745		1,745
Common stock transactions related to stock based employee benefit plans (in shares)		(9)
Common stock transactions related to stock based employee benefit plans	48	$ 2	(12)		58
Increase (decrease) in shares during period (in shares)		21
Increase (decrease) in stockholders' equity during period	32,439	$ 2	1,733	25,605	58	5,041
Ending balance (in shares) at Sep. 30, 2019		51,482
Ending balance at Sep. 30, 2019	$ 962,678	$ 5,148	$ 784,661	$ 168,637	$ (6,079)	$ 10,311

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation Basis of Presentation: The accompanying unaudited condensed consolidated financial statements of Seacoast Banking Corporation of Florida and its subsidiaries (the "Company") have been prepared in accordance with U.S. generally accepted accounting principles ("U.S. GAAP") 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. GAAP 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. Certain prior period amounts have been reclassified to conform to the current period presentation. Operating results for the nine months ended September 30, 2019 are not necessarily indicative of the results that may be expected for the year ending December 31, 2019 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, 2018 . Adoption of new accounting pronouncements: On January 1, 2019, the Company adopted Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) 2016-02, “Leases”, and all the related amendments (collectively, Accounting Standards Codification “ASC” Topic 842) through a cumulative-effect adjustment. The new guidance requires a lessee to recognize at the transition date right-of-use assets ("ROUA") and lease liabilities for all operating leases. Upon adoption, the Company recognized ROUAs of $29 million and lease liabilities of $33 million . Operating lease liabilities are measured based on the present value of lease payments over the lease term. At the transition date, ROUA was determined by adjusting lease liabilities for the carrying balances of deferred rent under ASC Topic 840 Leases , cease-use liabilities under ASC Topic 420 Exit or Disposal Cost Obligations , and assets and liabilities recognized under ASC Topic 805 Business Combinations for acquired operating leases, which aggregated to $4 million . We determine if an arrangement is a lease at the inception of a lease. ROUAs represent our right to use the underlying asset and lease liabilities represent our obligation to make lease payments for the lease term. Operating lease ROUAs and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. As most of our leases do not provide an implicit rate, we use our incremental borrowing rate based on the appropriate term and information available at commencement date in determining the present value of lease payments. The lease term may include options to extend the lease when it is reasonably certain that we will exercise that option. ROUAs and operating lease liabilities are reported in Other Assets and Other Liabilities, respectively, in the Consolidated Balance Sheet. Lease expense for lease payments is recognized on a straight-line basis over the lease term. The Company elected certain practical expedients offered by the FASB for all classes of leased assets. As a result, the Company has not reassessed whether existing contracts are or contain leases, nor has the Company reassessed the classification of existing leases. The Company elected not to separate lease and non-lease components and instead accounts for them as a single lease component. The Company also elected to exclude short-term leases from the recognition of ROUAs and lease liabilities. Therefore, if the lease term is equal to or less than twelve months (including the renewal options that we are reasonably certain to exercise) and we are not reasonably certain to exercise any available purchase options in the lease, we do not apply the new lease accounting guidance for those leases. The Company did not elect the hindsight practical expedient, which allows entities to use hindsight when determining lease term and impairment of ROUAs. On January 1, 2019, we adopted ASU 2017-12 “Derivatives and Hedging" (Topic 815): Targeted Improvements to Accounting for Hedging Activities. Upon adoption, we reclassified certain debt securities from held to maturity to available for sale. The following table summarizes the impact: January 1, 2019 (In thousands) Amortized Cost Net Unrealized Gain (Loss) Reflected in OCI Fair Value Private mortgage-backed securities and collateralized mortgage obligations $ 21,526 $ 147 $ 21,673 Collateralized loan obligations 32,000 (877 ) 31,123 Totals $ 53,526 $ (730 ) $ 52,796 Use of Estimates: The preparation of these condensed consolidated financial statements requires management to make judgments in the application of certain of its accounting policies that involve significant estimates and assumptions. We have established policies and control procedures that are intended to ensure valuation methods are well controlled and applied consistently from period to period. These estimates and assumptions, which may materially affect the reported amounts of certain assets, liabilities, revenues and expenses, are based on information available as of the date of the financial statements, and changes in this information over time and the use of revised estimates and assumptions could materially affect amounts reported in subsequent financial statements. Specific areas, among others, requiring the application of management’s estimates include determination of the allowance for loan losses, acquisition accounting and purchased loans, intangible assets and impairment testing, other fair value adjustments, other than temporary impairment of securities, income taxes and realization of deferred tax assets and contingent liabilities.

Recently Issued Accounting Stan

Recently Issued Accounting Standards, Not Yet Adopted	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Recently Issued Accounting Standards, Not Yet Adopted	Recently Issued Accounting Standards, Not Yet Adopted The following provides a brief description of accounting standards that have been issued but are not yet adopted that could have a material effect on the Company's financial statements: ASU 2016-13, Financial Instruments –Credit Losses (Topic 326) Description In June 2016, FASB issued guidance to replace the incurred loss model with an expected loss model, which is referred to as the current expected credit loss (CECL) model. The CECL model is applicable to the measurement of credit losses on financial assets measured at amortized cost, including loan receivables and held to maturity debt securities. It also applies to off-balance sheet credit exposures not accounted for as insurance (i.e. loan commitments, standby letters of credit, financial guarantees and other similar instruments). Date of Adoption This amendment is effective for SEC registrants that are not Smaller Reporting Companies, including the Company, for reporting periods beginning after December 15, 2019, including interim periods within that reporting period. Effect on the Consolidated Financial Statements The Company continues to validate and refine the credit loss estimation techniques and related processes that have been developed under the direction of the Company's transition oversight committee. Updates to business processes and the documentation of accounting policy decisions are ongoing. A validation of the CECL model has been completed by a third party and the the Company is currently conducting parallel runs of the CECL model process. The Company expects to recognize an increase in the allowance for credit losses upon adoption, which will be recorded as a one-time cumulative adjustment to retained earnings at the adoption date, January 1, 2020. The magnitude of the increase, however, has not yet been determined. The expected increase is primarily attributed to the impact of the new guidance on the Company’s acquired loan portfolio. For loans currently classified as purchased unimpaired (“PUL”), the CECL standard requires a reserve for expected credit losses to be established regardless of the impact of a purchase discount on the amortized cost basis. The accounting for existing PUL purchase discounts and premiums is not affected by the standard, and these will continue to accrete into interest income over the remaining lives of the loans on a level yield basis. Existing purchased credit impaired (“PCI”) loans will be classified as purchased credit deteriorated (“PCD”) loans and a reserve for expected credit losses will be established. The impact at adoption will be influenced by the outcome of our continuing review of the model, assumptions, methodologies and judgments, and by the loan portfolio composition and by macroeconomic conditions and forecasts at the adoption date. Additionally, the CECL model could produce higher volatility in the quarterly provision for credit losses than our current reserve process. The Company does not expect adoption of the standard to materially impact its held to maturity debt security portfolio, which is comprised of securities guaranteed either explicitly or implicitly by government sponsored entities. While available for sale (“AFS”) securities are not subject to the CECL allowance requirement, the new guidance requires the Company to record an allowance for AFS securities in an unrealized loss position if a portion of the unrealized loss is credit related. The Company does not expect a material impact to AFS securities upon adoption. ASU 2017-04, Intangibles – Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Description In January 2017, the FASB amended the existing guidance to simplify the goodwill impairment measurement test by eliminating Step 2. The amendment requires the Company to perform the goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount and recognizing an impairment charge for the amount by which the carrying amount exceeds the fair value. Additionally, an entity should consider the tax effects from any tax deductible goodwill on the carrying amount when measuring the impairment loss. Date of Adoption This amendment is effective for public business entities for reporting periods beginning after December 15, 2019, including interim periods within that reporting period. Early adoption is permitted on annual goodwill impairment tests performed after January 1, 2017. Effect on the Consolidated Financial Statements The impact to the Company's consolidated financial statements from the adoption of this pronouncement is not expected to be material.

Earnings per Share

Earnings per Share	9 Months Ended
	Sep. 30, 2019
Earnings Per Share [Abstract]
Earnings per Share	Earnings per Share Basic earnings per common share is computed by dividing net income available to common shareholders by the weighted average number of shares of common stock outstanding during the period. For both the three and nine months ended September 30, 2019 , options to purchase 492,000 shares were antidilutive in each period and, accordingly, were excluded in the computation of diluted earnings per share, compared to 481,000 and 412,000 shares, respectively, for the three and nine months ended September 30, 2018 . Three Months Ended September 30, Nine Months Ended September 30, (Dollars in thousands, except per share data) 2019 2018 2019 2018 Basic earnings per share Net income $ 25,605 $ 16,322 $ 71,563 $ 51,313 Average common shares outstanding 51,473 47,205 51,426 47,108 Net income per share $ 0.50 $ 0.35 $ 1.39 $ 1.09 Diluted earnings per share Net income $ 25,605 $ 16,322 $ 71,563 $ 51,313 Average common shares outstanding 51,473 47,205 51,426 47,108 Add: Dilutive effect of employee restricted stock and stock options 462 824 570 795 Average diluted shares outstanding 51,935 48,029 51,996 47,903 Net income per share $ 0.49 $ 0.34 $ 1.38 $ 1.07

Securities

Securities	9 Months Ended
	Sep. 30, 2019
Investments, Debt and Equity Securities [Abstract]
Securities	Securities The amortized cost, gross unrealized gains and losses and fair value of securities available for sale and held to maturity at September 30, 2019 and December 31, 2018 are summarized as follows: September 30, 2019 (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Debt securities available for sale U.S. Treasury securities and obligations of U.S. government agencies $ 10,206 $ 319 $ (1 ) $ 10,524 Mortgage-backed securities and collateralized mortgage obligations of U.S. government sponsored entities 562,270 12,096 (520 ) 573,846 Private mortgage-backed securities and collateralized mortgage obligations 60,809 1,808 (17 ) 62,600 Collateralized loan obligations 241,387 1 (1,402 ) 239,986 Obligations of state and political subdivisions 32,506 1,349 — 33,855 Totals $ 907,178 $ 15,573 $ (1,940 ) $ 920,811 Debt securities held to maturity Mortgage-backed securities of U.S. government sponsored entities $ 273,644 $ 3,930 $ (1,505 ) $ 276,069 Totals $ 273,644 $ 3,930 $ (1,505 ) $ 276,069 December 31, 2018 (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Debt securities available for sale U.S. Treasury securities and obligations of U.S. government agencies $ 7,200 $ 106 $ (6 ) $ 7,300 Mortgage-backed securities and collateralized mortgage obligations of U.S. government sponsored entities 567,753 300 (14,047 ) 554,006 Private mortgage-backed securities and collateralized mortgage obligations 55,569 560 (401 ) 55,728 Collateralized loan obligations 212,807 1 (3,442 ) 209,366 Obligations of state and political subdivisions 39,543 339 (451 ) 39,431 Totals $ 882,872 $ 1,306 $ (18,347 ) $ 865,831 Debt securities held to maturity Mortgage-backed securities of U.S. government sponsored entities $ 304,423 $ — $ (7,324 ) $ 297,099 Private mortgage-backed securities and collateralized mortgage obligations 21,526 277 (130 ) 21,673 Collateralized loan obligations 32,000 — (877 ) 31,123 Totals $ 357,949 $ 277 $ (8,331 ) $ 349,895 Proceeds from sales of securities during the three and nine months ended September 30, 2019 were $49.6 million and $122.9 million , respectively. Included in "Securities losses, net" for the three months ended September 30, 2019 are gross losses of $0.9 million , and for the nine months ended September 30, 2019 , are gross gains of $0.3 million and gross losses of $1.8 million . Also included in “Securities losses, net” for the three and nine months ended September 30, 2019 is an increase of $0.1 million and $0.2 million , respectively, in the value of an investment in shares of a mutual fund that invests primarily in CRA-qualified debt securities. There were no sales of securities during the three and nine months ended September 30, 2018 . Included in “Securities losses, net” for the three and nine months ended September 30, 2018 , is a decrease of $0.1 million and $0.2 million , respectively, in the value of the CRA-qualified mutual fund investment. On January 1, 2019, the Company adopted ASU 2017-12 and subsequently transferred held to maturity debt securities with an amortized cost basis of $53.5 million to available for sale. Those securities had unrealized losses of $0.7 million that was recorded in other comprehensive income on the date of transfer. At September 30, 2019 , debt securities with a fair value of $86.1 million were pledged as collateral for United States Treasury deposits, other public deposits and trust deposits. Debt securities with a fair value of $99.9 million were pledged as collateral for repurchase agreements. The amortized cost and fair value of debt securities held to maturity and available for sale at September 30, 2019 , 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 (In thousands) Amortized Cost Fair Value Amortized Cost Fair Value Due in less than one year $ — $ — $ 10,047 $ 10,069 Due after one year through five years — — 134,560 134,537 Due after five years through ten years — — 131,057 130,712 Due after ten years — — 8,435 9,047 — — 284,099 284,365 Mortgage-backed securities and collateralized mortgage obligations of U.S. government sponsored entities 273,644 276,069 562,270 573,846 Private mortgage-backed securities and collateralized mortgage obligations — — 60,809 62,600 Totals $ 273,644 $ 276,069 $ 907,178 $ 920,811 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 flows analyses, using observable market data where available. The tables below indicate the fair value of debt securities with unrealized losses and the period of time for which these losses were outstanding at September 30, 2019 and December 31, 2018 , respectively. September 30, 2019 Less Than 12 Months 12 Months or Longer Total (In thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses U.S. Treasury securities and obligations of U.S. government agencies $ 438 (1 ) $ — $ — $ 438 $ (1 ) Mortgage-backed securities and collateralized mortgage obligations of U.S. government sponsored entities 83,139 (383 ) 115,545 (1,642 ) 198,684 (2,025 ) Private mortgage-backed securities and collateralized mortgage obligations 8,010 (17 ) — — 8,010 (17 ) Collateralized loan obligations 118,668 (568 ) 110,516 (834 ) 229,184 (1,402 ) Totals $ 210,255 $ (969 ) $ 226,061 $ (2,476 ) $ 436,316 $ (3,445 ) December 31, 2018 Less Than 12 Months 12 Months or Longer Total (In thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses U.S. Treasury securities and obligations of U.S. government agencies $ 99 $ (1 ) $ 642 $ (5 ) $ 741 $ (6 ) Mortgage-backed securities and collateralized mortgage obligations of U.S. government sponsored entities 200,184 (2,235 ) 623,420 (19,136 ) 823,604 (21,371 ) Private mortgage-backed securities and collateralized mortgage obligations 20,071 (344 ) 12,739 (187 ) 32,810 (531 ) Collateralized loan obligations 238,894 (4,319 ) — — 238,894 (4,319 ) Obligations of state and political subdivisions 19,175 (241 ) 9,553 (210 ) 28,728 (451 ) Totals $ 478,423 $ (7,140 ) $ 646,354 $ (19,538 ) $ 1,124,777 $ (26,678 ) The two tables above include debt securities that were transferred from available for sale into held to maturity during 2014. Those securities had unrealized losses of $3.1 million at the date of transfer, and at September 30, 2019 , the unamortized balance was $0.4 million . At September 30, 2019 , the Company had $2.0 million of unrealized losses on mortgage-backed securities and collateralized mortgage obligations of government sponsored entities having a fair value of $198.7 million that were attributable to a combination of factors, including relative changes in interest rates since the time of purchase. The contractual cash flows for these securities are guaranteed by U.S. government agencies and U.S. government-sponsored enterprises. Based on the assessment of these mitigating factors, management believes that the unrealized losses on these debt security holdings are a function of changes in investment spreads and interest rate movements and not changes in credit quality. Management expects to recover the entire amortized cost basis of these securities. At September 30, 2019 , the Company had unrealized losses of $1.4 million on collateralized loan obligations with a fair value of $229.2 million . The collateral for these securities is first lien senior secured corporate debt. The Company holds senior tranches rated credit A or higher. Management expects to recover the entire amortized cost basis of these securities. At September 30, 2019 , the Company does not intend to sell debt securities that are in an unrealized loss position and it is not more than 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, 2019 . Included in other assets at September 30, 2019 is $33.0 million of Federal Home Loan Bank and Federal Reserve Bank stock stated at par value. The Company has not identified events or changes in circumstances which may have a significant adverse effect on the fair value of these cost method investment securities. Also included in other assets is a $6.4 million investment in a CRA-qualified mutual fund carried at fair value. The Company holds 11,330 shares of Visa Class B stock, which following resolution of Visa litigation will be converted to Visa Class A shares. Under the current conversion ratio that became effective September 27, 2019 , the Company would receive 1.6228 shares of Class A stock for each share of Class B stock for a total of 18,386

Loans

Loans	9 Months Ended
	Sep. 30, 2019
Receivables [Abstract]
Loans	Loans Information pertaining to portfolio loans, purchased credit impaired (“PCI”) loans, and purchased unimpaired loans (“PUL”) is as follows: September 30, 2019 (In thousands) Portfolio Loans PCI Loans PULs Total Construction and land development $ 272,915 $ 158 $ 53,251 $ 326,324 Commercial real estate 1,709,227 10,259 590,881 2,310,367 Residential real estate 1,184,579 2,364 223,003 1,409,946 Commercial and financial 635,153 600 86,533 722,286 Consumer 208,425 — 8,941 217,366 Totals 1 $ 4,010,299 $ 13,381 $ 962,609 $ 4,986,289 December 31, 2018 (In thousands) Portfolio Loans PCI Loans PULs Total Construction and land development $ 301,473 $ 151 $ 141,944 $ 443,568 Commercial real estate 1,437,989 10,828 683,249 2,132,066 Residential real estate 1,055,525 2,718 266,134 1,324,377 Commercial and financial 603,057 737 118,528 722,322 Consumer 190,207 — 12,674 202,881 Totals 1 $ 3,588,251 $ 14,434 $ 1,222,529 $ 4,825,214 1 Net loan balances as of September 30, 2019 and December 31, 2018 include deferred costs of $18.7 million and $16.9 million for each period, respectively. The following tables present the contractual delinquency of the recorded investment by class of loans as of: September 30, 2019 (In thousands) Current Accruing 30-59 Days Past Due Accruing 60-89 Days Past Due Accruing Greater Than 90 Days Nonaccrual Total Financing Receivables Portfolio Loans Construction and land development $ 266,815 $ 1,747 $ — $ — $ 4,353 $ 272,915 Commercial real estate 1,702,928 1,271 599 — 4,429 1,709,227 Residential real estate 1,173,158 3,349 182 — 7,890 1,184,579 Commercial and financial 627,056 4,448 — — 3,649 635,153 Consumer 207,467 572 306 — 80 208,425 Total Portfolio Loans 3,977,424 11,387 1,087 — 20,401 4,010,299 Purchased Unimpaired Loans Construction and land development 49,682 — 2,995 — 574 53,251 Commercial real estate 587,865 872 848 — 1,296 590,881 Residential real estate 222,383 75 122 — 423 223,003 Commercial and financial 84,614 1,362 — — 557 86,533 Consumer 8,796 116 — — 29 8,941 Total PULs 953,340 2,425 3,965 — 2,879 962,609 Purchased Credit Impaired Loans Construction and land development 145 — — — 13 158 Commercial real estate 9,314 — — — 945 10,259 Residential real estate 573 — — — 1,791 2,364 Commercial and financial 585 — — — 15 600 Consumer — — — — — — Total PCI Loans 10,617 — — — 2,764 13,381 Total Loans $ 4,941,381 $ 13,812 $ 5,052 $ — $ 26,044 $ 4,986,289 December 31, 2018 (In thousands) Current Accruing 30-59 Days Past Due Accruing 60-89 Days Past Due Accruing Greater Than 90 Days Nonaccrual Total Financing Receivables Portfolio Loans Construction and land development $ 301,348 $ 97 $ — $ — $ 28 $ 301,473 Commercial real estate 1,427,413 3,852 97 141 6,486 1,437,989 Residential real estate 1,044,375 2,524 525 295 7,806 1,055,525 Commercial and financial 594,930 5,186 1,661 — 1,280 603,057 Consumer 189,061 637 326 — 183 190,207 Total Portfolio Loans 3,557,127 12,296 2,609 436 15,783 3,588,251 Purchased Unimpaired Loans Construction and land development 140,013 1,931 — — — 141,944 Commercial real estate 680,060 1,846 — — 1,343 683,249 Residential real estate 260,781 1,523 — 90 3,740 266,134 Commercial and financial 116,173 342 — — 2,013 118,528 Consumer 12,643 — 31 — — 12,674 Total PULs 1,209,670 5,642 31 90 7,096 1,222,529 Purchased Credit Impaired Loans Construction and land development 135 — — — 16 151 Commercial real estate 8,403 1,034 — — 1,391 10,828 Residential real estate 556 — — — 2,162 2,718 Commercial and financial 74 635 — — 28 737 Consumer — — — — — — Total PCI Loans 9,168 1,669 — — 3,597 14,434 Total Loans $ 4,775,965 $ 19,607 $ 2,640 $ 526 $ 26,476 $ 4,825,214 The Company's Credit Risk Management also utilizes an internal asset classification system as a means of identifying problem and potential problem loans. The following classifications are used to categorize loans under the internal classification system: • Pass: Loans that are not problem loans or potential problem loans are considered to be pass-rated. • Special Mention: 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 with the distinct possibility that the Company will sustain some loss if the deficiencies are not corrected. • Doubtful: Loans that have all the weaknesses inherent in those classified Substandard with the added characteristic that the weakness present makes collection or liquidation in full, on the basis of currently existing facts, conditions and values, highly questionable and improbable. The principal balance of loans classified as doubtful are likely to be charged off. Risk ratings on commercial lending facilities are re-evaluated during the annual review process at a minimum, based on the size of the aggregate exposure, and/or when there is a credit action of the existing credit exposure. The following tables present the risk category of loans by class based on the most recent analysis performed as of: September 30, 2019 (In thousands) Pass Special Mention Substandard Doubtful Total Construction and land development $ 316,636 $ 4,559 $ 5,129 $ — $ 326,324 Commercial real estate 2,260,472 27,838 21,736 321 2,310,367 Residential real estate 1,386,760 3,978 19,208 — 1,409,946 Commercial and financial 703,565 10,436 7,135 1,150 722,286 Consumer 212,955 3,417 994 — 217,366 Totals $ 4,880,388 $ 50,228 $ 54,202 $ 1,471 $ 4,986,289 December 31, 2018 (In thousands) Pass Special Mention Substandard Doubtful Total Construction and land development $ 428,044 $ 10,429 $ 5,095 $ — $ 443,568 Commercial real estate 2,063,589 41,429 27,048 — 2,132,066 Residential real estate 1,296,634 3,654 24,089 — 1,324,377 Commercial and financial 707,663 8,387 6,247 25 722,322 Consumer 198,367 3,397 1,117 — 202,881 Totals $ 4,694,297 $ 67,296 $ 63,596 $ 25 $ 4,825,214 PCI 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 at acquisition, considering the impact of prepayments, is referred to as the non-accretable difference. The table below summarizes the changes in accretable yield on PCI loans for the periods ended: Three Months Ended September 30, Nine Months Ended September 30, (In thousands) 2019 2018 2019 2018 Beginning balance $ 2,344 $ 3,189 $ 2,822 $ 3,699 Additions — — — — Deletions — — — (43 ) Accretion (287 ) (284 ) (1,336 ) (989 ) Reclassification from non-accretable difference 62 — 633 238 Ending balance $ 2,119 $ 2,905 $ 2,119 $ 2,905 Troubled Debt Restructured Loans The Company’s Troubled Debt Restructuring (“TDR”) concessions granted to certain borrowers 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. Loan modifications are not reported in calendar years after modification if the loans were modified at an interest rate equal to the yields of new loan originations with comparable risk and the loans are performing based on the terms of the restructured agreements. Most loans prior to modification were classified as impaired and the allowance for loan losses is determined in accordance with Company policy. During the three and nine months ended September 30, 2019 , there were three loans totaling $1.6 million and seven loans totaling $4.0 million , respectively, modified in a TDR. There were three defaults totaling $2.1 million of loans to a single borrower modified in TDRs within the twelve months preceding September 30, 2019 . During the three and nine months ended September 30, 2018 there was one loan totaling $0.1 million modified in a TDR. There was one loan that defaulted which had been modified in a TDR of $0.1 million during the t welve months preceding September 30, 2018 . 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. Impaired Loans Loans are considered impaired if they are 90 days or more past due, in nonaccrual status, or are TDRs. As of September 30, 2019 and December 31, 2018 , the Company’s recorded investment in impaired loans, excluding PCI loans, the unpaid principal balance and related valuation allowance was as follows: September 30, 2019 (In thousands) Recorded Investment Unpaid Principal Balance Related Valuation Allowance Impaired Loans with No Related Allowance Recorded: Construction and land development $ 4,972 $ 5,169 $ — Commercial real estate 6,222 7,649 — Residential real estate 9,727 14,223 — Commercial and financial 3,407 4,406 — Consumer 118 131 — Impaired Loans with an Allowance Recorded: Construction and land development 98 114 16 Commercial real estate 4,223 4,223 247 Residential real estate 4,888 5,035 517 Commercial and financial 1,948 1,963 727 Consumer 229 245 57 Total Impaired Loans Construction and land development 5,070 5,283 16 Commercial real estate 10,445 11,872 247 Residential real estate 14,615 19,258 517 Commercial and financial 5,355 6,369 727 Consumer 347 376 57 Totals $ 35,832 $ 43,158 $ 1,564 December 31, 2018 (In thousands) Recorded Investment Unpaid Principal Balance Related Valuation Allowance Impaired Loans with No Related Allowance Recorded: Construction and land development $ 15 $ 229 $ — Commercial real estate 3,852 5,138 — Residential real estate 13,510 18,111 — Commercial and financial 1,191 1,414 — Consumer 280 291 — Impaired Loans with an Allowance Recorded: Construction and land development 196 211 22 Commercial real estate 9,786 12,967 369 Residential real estate 5,537 5,664 805 Commercial and financial 2,131 2,309 1,498 Consumer 202 211 34 Total Impaired Loans Construction and land development 211 440 22 Commercial real estate 13,638 18,105 369 Residential real estate 19,047 23,775 805 Commercial and financial 3,322 3,723 1,498 Consumer 482 502 34 Totals $ 36,700 $ 46,545 $ 2,728 Impaired loans also include TDRs where concessions have been granted to borrowers who have experienced financial difficulty. At September 30, 2019 and at December 31, 2018 , accruing TDRs totaled $12.4 million and $13.3 million , respectively. Average impaired loans for the three months ended September 30, 2019 and 2018 were $35.1 million and $38.1 million , respectively. Average impaired loans for the nine months ended September 30, 2019 and 2018 were $35.5 million and $34.5 million , respectively. The impaired loans were 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 interest 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 in principal. For the three months ended September 30, 2019 and 2018 , the Company recorded interest income on impaired loans of $0.7 million and $0.5 million , respectively. For the nine months ended September 30, 2019 and 2018 , the Company recorded interest income on impaired loans of $1.5 million and $1.4 million , respectively. For impaired loans whose impairment is measured based on the present value of expected future cash flows, interest income represents the change in present value attributable to the passage of time, and totaled $40,000 and $36,000 , respectively, for the three months ended September 30, 2019 and 2018 , and $102,000 and $157,000 , respectively, for the nine months ended September 30, 2019 and 2018 .

Allowance for Loan Losses

Allowance for Loan Losses	9 Months Ended
	Sep. 30, 2019
Receivables [Abstract]
Allowance for Loan Losses	Allowance for Loan Losses Activity in the allowance for loan losses for the three and nine month periods ended September 30, 2019 and 2018 is summarized as follows: Three Months Ended September 30, 2019 (In thousands) Beginning Balance Provision for Loan Losses Charge- Offs Recoveries TDR Allowance Adjustments Ending Balance Construction & land development $ 2,243 $ (395 ) $ — $ 6 $ — $ 1,854 Commercial real estate 11,870 1,368 (232 ) 10 (19 ) 12,997 Residential real estate 7,508 87 (38 ) 52 (20 ) 7,589 Commercial and financial 8,912 769 (1,625 ) 295 — 8,351 Consumer 2,972 422 (697 ) 118 (1 ) 2,814 Totals $ 33,505 $ 2,251 $ (2,592 ) $ 481 $ (40 ) $ 33,605 Three Months Ended September 30, 2018 (In thousands) Beginning Balance Provision for Loan Losses Charge- Offs Recoveries TDR Allowance Adjustments Ending Balance Construction & land development $ 2,287 $ (221 ) $ — $ 3 $ — $ 2,069 Commercial real estate 9,126 4,191 (1 ) 18 (16 ) 13,318 Residential real estate 8,850 (1,279 ) (6 ) 99 (19 ) 7,645 Commercial and financial 7,102 1,739 (842 ) 163 — 8,162 Consumer 1,559 1,344 (296 ) 65 (1 ) 2,671 Totals $ 28,924 $ 5,774 $ (1,145 ) $ 348 $ (36 ) $ 33,865 Nine Months Ended September 30, 2019 (In thousands) Beginning Balance Provision for Loan Losses Charge- Offs Recoveries TDR Allowance Adjustments Ending Balance Construction & land development $ 2,233 $ (391 ) $ — $ 13 $ (1 ) $ 1,854 Commercial real estate 11,112 1,560 (248 ) 622 (49 ) 12,997 Residential real estate 7,775 (276 ) (102 ) 242 (50 ) 7,589 Commercial and financial 8,585 3,736 (4,450 ) 480 — 8,351 Consumer 2,718 1,570 (1,915 ) 443 (2 ) 2,814 Totals $ 32,423 $ 6,199 $ (6,715 ) $ 1,800 $ (102 ) $ 33,605 Nine Months Ended September 30, 2018 (In thousands) Beginning Balance Provision for Loan Losses Charge- Offs Recoveries TDR Allowance Adjustments Ending Balance Construction & land development $ 1,642 $ 414 $ — $ 13 $ — $ 2,069 Commercial real estate 9,285 3,826 (15 ) 268 (46 ) 13,318 Residential real estate 7,131 (78 ) (33 ) 733 (108 ) 7,645 Commercial and financial 7,297 3,639 (2,985 ) 211 — 8,162 Consumer 1,767 1,587 (931 ) 251 (3 ) 2,671 Totals $ 27,122 $ 9,388 $ (3,964 ) $ 1,476 $ (157 ) $ 33,865 The allowance for loan losses is comprised 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, 2019 and December 31, 2018 is shown in the following tables: September 30, 2019 Individually Evaluated for Impairment Collectively Evaluated for Impairment Total (In thousands) Recorded Investment Associated Allowance Recorded Investment Associated Allowance Recorded Investment Associated Allowance Construction & land development $ 5,070 $ 16 $ 321,096 $ 1,838 $ 326,166 $ 1,854 Commercial real estate 10,445 247 2,289,663 12,750 2,300,108 12,997 Residential real estate 14,615 517 1,392,967 7,072 1,407,582 7,589 Commercial and financial 5,355 727 716,331 7,624 721,686 8,351 Consumer 347 57 217,019 2,757 217,366 2,814 Totals $ 35,832 $ 1,564 $ 4,937,076 $ 32,041 $ 4,972,908 $ 33,605 December 31, 2018 Individually Evaluated for Impairment Collectively Evaluated for Impairment Total (In thousands) Recorded Investment Associated Allowance Recorded Investment Associated Allowance Recorded Investment Associated Allowance Construction & land development $ 211 $ 22 $ 443,206 $ 2,211 $ 443,417 $ 2,233 Commercial real estate 13,638 369 2,107,600 10,743 2,121,238 11,112 Residential real estate 19,047 805 1,302,612 6,970 1,321,659 7,775 Commercial and financial 3,322 1,498 718,263 7,087 721,585 8,585 Consumer 482 34 202,399 2,684 202,881 2,718 Totals $ 36,700 $ 2,728 $ 4,774,080 $ 29,695 $ 4,810,780 $ 32,423 Loans collectively evaluated for impairment reported at September 30, 2019 included acquired loans that are not PCI loans. At September 30, 2019 , the remaining fair value adjustments for PUL loans was approximately $36.3 million, or approximately 3.8% of the outstanding aggregate PUL balances. At December 31, 2018 , the remaining fair value adjustments for PUL loans was approximately $47.0 million, or 3.9% of the outstanding aggregate PUL balances. These amounts are accreted into interest income over the remaining lives of the related loans on a level yield basis. The table below summarizes PCI loans that were individually evaluated for impairment based on expected cash flows at September 30, 2019 and December 31, 2018 : September 30, 2019 December 31, 2018 PCI Loans Individually Evaluated for Impairment (In thousands) Recorded Investment Associated Allowance Recorded Investment Associated Allowance Construction & land development $ 158 $ — $ 151 $ — Commercial real estate 10,259 — 10,828 — Residential real estate 2,364 — 2,718 — Commercial and financial 600 — 737 — Consumer — — — — Totals $ 13,381 $ — $ 14,434 $ —

Securities Sold Under Agreement

Securities Sold Under Agreements to Repurchase	9 Months Ended
	Sep. 30, 2019
Brokers and Dealers [Abstract]
Securities Sold Under Agreements to Repurchase	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. Company securities sold under agreements to repurchase and securities pledged were as follows by collateral type and maturity as of: (In thousands) September 30, 2019 December 31, 2018 Fair value of pledged securities - overnight and continuous: Mortgage-backed securities and collateralized mortgage obligations of U.S. government sponsored entities $ 99,881 $ 246,829

Lease Commitments

Lease Commitments	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Lease Commitments	Lease Commitments The Company is the lessee in various noncancellable operating leases for land, buildings, and equipment. Certain leases contain provisions for variable lease payments that are linked to the consumer price index. Lease cost for the three and nine months ended September 30, 2019 consists of: (In thousands) Three Months Ended September 30, 2019 Nine Months Ended September 30, 2019 Operating lease cost $ 1,385 $ 4,174 Variable lease cost 305 901 Short-term lease cost 154 574 Sublease income (179 ) (440 ) Total lease cost $ 1,665 $ 5,209 The following table provides supplemental information related to leases as of and for the nine months ended September 30, 2019 : (In thousands, except for weighted average data) September 30, 2019 Operating lease right-of-use assets $ 26,355 Operating lease liabilities 30,381 Cash paid for amounts included in the measurement of operating lease liabilities 4,445 Right-of-use assets obtained in exchange for new operating lease obligations 353 Weighted average remaining lease term for operating leases 9 years Weighted average discount rate for operating leases 4.71 % The Company’s lease agreements often include one or more options to renew at the Company’s discretion. If, at lease inception, the Company considers the exercising of a renewal option to be reasonably certain, the Company includes the extended term in the calculation of the lease liability. Maturities of lease liabilities as of September 30, 2019 are as follows: Twelve Months Ended September 30, (In thousands) 2020 $ 5,765 2021 4,768 2022 4,493 2023 3,601 2024 3,542 Thereafter 15,360 Total undiscounted cash flows 37,529 Less: Net present value adjustment (7,148 ) Total $ 30,381

Noninterest Income and Expense

Noninterest Income and Expense	9 Months Ended
	Sep. 30, 2019
Brokers and Dealers [Abstract]
Noninterest Income and Expense	Noninterest Income and Expense Details of noninterest income and expenses for the three and nine months ended September 30, 2019 and 2018 are as follows: Three Months Ended September 30, Nine Months Ended September 30, (In thousands) 2019 2018 2019 2018 Noninterest income Service charges on deposit accounts $ 2,978 $ 2,833 $ 8,569 $ 8,179 Trust fees 1,183 1,083 3,347 3,143 Mortgage banking fees 2,127 1,135 4,976 3,873 Brokerage commissions and fees 449 444 1,426 1,264 Marine finance fees 152 194 715 1,213 Interchange income 3,206 3,119 10,012 9,137 BOLI income 928 1,078 2,770 3,200 SBA gains 569 473 1,896 1,955 Other income 3,198 1,980 7,967 5,542 14,790 12,339 41,678 37,506 Securities losses, net (847 ) (48 ) (1,322 ) (198 ) Total $ 13,943 $ 12,291 $ 40,356 $ 37,308 Noninterest expense Salaries and wages $ 18,640 $ 17,129 $ 56,566 $ 48,939 Employee benefits 2,973 3,205 10,374 9,320 Outsourced data processing costs 3,711 3,493 11,432 10,565 Telephone/data lines 603 624 2,307 1,879 Occupancy 3,368 3,214 10,916 9,647 Furniture and equipment 1,528 1,367 4,829 4,292 Marketing 933 1,139 3,276 3,735 Legal and professional fees 1,648 2,019 6,528 6,293 FDIC assessments 56 431 881 1,624 Amortization of intangibles 1,456 1,004 4,370 2,997 Foreclosed property expense and net (gain)/loss on sale 262 (136 ) 48 461 Other 3,405 3,910 11,155 13,057 Total $ 38,583 $ 37,399 $ 122,682 $ 112,809

Equity Capital

Equity Capital	9 Months Ended
	Sep. 30, 2019
Equity [Abstract]
Equity Capital	Equity Capital The Company is well capitalized and at September 30, 2019 , the Company and the Company’s principal banking subsidiary, Seacoast Bank, exceeded the common equity Tier 1 (CET1) capital ratio regulatory threshold of 6.5% for well-capitalized institutions under the Basel III standardized transition approach, as well as risk-based and leverage ratio requirements for well capitalized banks under the regulatory framework for prompt corrective action.

Contingent Liabilities

Contingent Liabilities	9 Months Ended
	Sep. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Contingent Liabilities	Contingent Liabilities The Company and its subsidiaries, because of the nature of their business, are at all times subject to numerous 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 materially adverse effect on the Company’s consolidated financial condition, operating results or cash flows.

Fair Value

Fair Value	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value	Fair Value Under ASC Topic 820, fair value measurements for items measured at fair value on a recurring and nonrecurring basis at September 30, 2019 and December 31, 2018 included: (In thousands) Fair Value Measurements Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) September 30, 2019 Available for sale debt securities 1 $ 920,811 $ 100 $ 920,711 $ — Loans held for sale 2 26,768 — 26,768 — Loans 3 4,606 — 1,737 2,869 Other real estate owned 4 13,593 — 241 13,352 Equity securities 5 6,422 6,422 — — December 31, 2018 Available for sale debt securities 1 $ 865,831 $ 100 $ 865,731 $ — Loans held for sale 2 11,873 — 11,873 — Loans 3 8,590 — 2,290 6,300 Other real estate owned 4 12,802 — 297 12,505 Equity securities 5 6,205 6,205 — — 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 E. 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 Topic 310. 4 Fair value is measured on a nonrecurring basis in accordance with ASC Topic 360. 5 An investment in shares of a mutual fund that invests primarily in CRA-qualified debt securities, reported at fair value in Other Assets. Recurring fair value basis is determined using market quotations. Available for sale debt 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 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. 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 held for sale : Fair values are based upon estimated values to be 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 were 90 days or more past due or on nonaccrual as of September 30, 2019 and December 31, 2018 . The aggregate fair value and contractual balance of loans held for sale as of September 30, 2019 and December 31, 2018 is as follows: (In thousands) September 30, 2019 December 31, 2018 Aggregate fair value $ 26,768 $ 11,873 Contractual balance 25,803 11,562 Excess 965 311 Loans : Level 2 loans consist of impaired real estate loans which are collateral dependent. Fair value is based on recent real estate appraisals less estimated costs of sale. For residential real estate impaired loans, appraised values or internal evaluations are based on the comparative sales approach. Level 3 loans consist of commercial and commercial real estate impaired loans. For these 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, 2019 , the capitalization rates utilized to determine fair value of the underlying collateral averaged approximately 7.6% . Adjustments to comparable sales may be made by an appraiser to reflect local market conditions or other economic factors and may result in changes in the fair value of an asset over time. As such, the fair value of these impaired loans is considered level 3 in the fair value hierarchy. Impaired loans measured at fair value total $4.6 million with a specific reserve of $1.6 million at September 30, 2019 , compared to $8.6 million with a specific reserve of $2.7 million at December 31, 2018 . For loans classified as level 3, changes included loans migrating to OREO of $4.6 million and paydowns and chargeoffs of $1.5 million , offset by additions of $2.7 million for the nine months ended September 30, 2019 . Other real estate owned : 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. For OREO classified as level 3 during the nine months ended September 30, 2019 , changes included additions of foreclosed loans of $5.5 million , offset by sales of $4.3 million and writedowns of $0.4 million . 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. There were no such transfers for loans and OREO classified as level 3 during the nine months ended September 30, 2019 and 2018 . The carrying amount and fair value of the Company’s other financial instruments that were not disclosed previously in the balance sheet and for which carrying amount is not fair value as of September 30, 2019 and December 31, 2018 is as follows: (In thousands) Carrying Amount Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) September 30, 2019 Financial Assets Debt securities held to maturity 1 $ 273,644 $ — $ 276,069 $ — Time deposits with other banks 4,579 — — 4,473 Loans, net 4,948,078 — — 4,961,833 Financial Liabilities Deposit liabilities 5,673,141 — — 5,672,972 Federal Home Loan Bank (FHLB) borrowings 50,000 — — 49,996 Subordinated debt 71,014 — 61,160 — December 31, 2018 Financial Assets Debt securities held to maturity 1 $ 357,949 $ — $ 349,895 $ — Time deposits with other banks 8,243 — — 8,132 Loans, net 4,784,201 — — 4,835,248 Financial Liabilities Deposit liabilities 5,177,240 — — 5,172,098 Federal Home Loan Bank (FHLB) borrowings 380,000 — — 380,027 Subordinated debt 70,804 — 61,224 — 1 See Note D for further detail 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, and securities sold under agreements to repurchase, maturing within 30 days. 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, 2019 and December 31, 2018 : Held to maturity debt securities : These debt securities are reported at fair value utilizing level 2 inputs. 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. 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 as well as performing and nonperforming categories. The fair value of loans is calculated by discounting scheduled cash flows through the estimated life including prepayment considerations, using estimated market discount rates that reflect the risks inherent in the loan. The fair value approach considers market-driven variables including credit related factors and reflects an “exit price” as defined in ASC 820. 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, 2019
Business Combinations [Abstract]
Business Combinations	Business Combinations Acquisition of First Green Bancorp, Inc. On October 19, 2018, the Company completed its acquisition of First Green Bancorp, Inc (“First Green”). Simultaneously, upon completion of the merger of First Green and the Company, First Green's wholly owned subsidiary bank, First Green Bank, was merged with and into Seacoast Bank. Prior to the acquisition, First Green operated seven branches in the Orlando, Daytona, and Fort Lauderdale markets. As a result of this acquisition, the Company expects to enhance its presence in the Orlando, Daytona, and Fort Lauderdale markets, expand its customer base and leverage operating cost through economies of scale, and positively affect the Company’s operating results to the extent the Company earns more from interest earning assets than it pays in interest on its interest bearing liabilities. The Company acquired 100% of the outstanding common stock of First Green. Under the terms of the definitive agreement, each share of First Green common stock was converted into the right to receive 0.7324 shares of Seacoast common stock. (In thousands, except per share data) October 19, 2018 Shares exchanged for cash $ 5,462 Per share exchange ratio 0.7324 Number of shares of common stock issued 4,000 Multiplied by common stock price per share on October 19, 2018 $ 26.87 Value of common stock issued 107,486 Cash paid for First Green vested stock options 6,558 Total purchase price $ 114,044 The acquisition of First Green was accounted for under the acquisition method in accordance with ASC Topic 805, Business Combinations . The Company recognized goodwill of $56.7 million for this acquisition that is nondeductible for tax purposes. Determining fair values of assets and liabilities, especially the loan portfolio, core deposit intangibles, and deferred taxes, is a complicated process involving significant judgment regarding methods and assumptions used to calculate estimated fair values. The adjustments reflected in the table below are the result of information obtained subsequent to the initial measurement. (In thousands) Initially Measured October 19, 2018 Measurement Period Adjustments As Adjusted October 19, 2018 Assets: Cash $ 29,434 $ — $ 29,434 Investment securities 32,145 — 32,145 Loans, net 631,497 — 631,497 Fixed assets 16,828 — 16,828 Other real estate owned 410 — 410 Core deposit intangibles 10,170 (678 ) 9,492 Goodwill 56,198 532 56,730 Other assets 40,669 181 40,850 Totals $ 817,351 $ 35 $ 817,386 Liabilities: Deposits $ 624,289 $ — $ 624,289 Other liabilities 79,018 35 79,053 Totals $ 703,307 $ 35 $ 703,342 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. October 19, 2018 (In thousands) Book Balance Fair Value Loans: Single family residential real estate $ 101,674 $ 101,119 Commercial real estate 437,767 406,613 Construction/development/land 61,195 58,385 Commercial loans 56,288 54,973 Consumer and other loans 9,156 8,942 Purchased Credit Impaired 2,136 1,465 Total acquired loans $ 668,216 $ 631,497 For the loans acquired we first segregated all acquired loans with specifically identified credit deficiency factors. 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.” 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 October 19, 2018 for PCI loans. Contractually required principal and interest payments have been adjusted for estimated prepayments. (In thousands) October 19, 2018 Contractually required principal and interest $ 2,136 Non-accretable difference (671 ) Cash flows expected to be collected 1,465 Accretable yield — Total purchased credit-impaired loans acquired $ 1,465 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. 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. Pro-Forma Information Pro-forma data for the three and nine months ended September 30, 2018 presents information as if the acquisition of First Green occurred at the beginning of 2018 , as follows: (In thousands, except per share amounts) Three Months Ended September 30, 2018 Nine Months Ended September 30, 2018 Net interest income $ 59,670 $ 174,416 Net income 21,070 64,440 EPS - basic $ 0.41 $ 1.26 EPS - diluted 0.40 1.24

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation: The accompanying unaudited condensed consolidated financial statements of Seacoast Banking Corporation of Florida and its subsidiaries (the "Company") have been prepared in accordance with U.S. generally accepted accounting principles ("U.S. GAAP") 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. GAAP 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. Certain prior period amounts have been reclassified to conform to the current period presentation. Operating results for the nine months ended September 30, 2019 are not necessarily indicative of the results that may be expected for the year ending December 31, 2019 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, 2018
Adoption of New Accounting Pronouncements and Recent Issued Accounting Standards, Not Yet Adopted	Adoption of new accounting pronouncements: On January 1, 2019, the Company adopted Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) 2016-02, “Leases”, and all the related amendments (collectively, Accounting Standards Codification “ASC” Topic 842) through a cumulative-effect adjustment. The new guidance requires a lessee to recognize at the transition date right-of-use assets ("ROUA") and lease liabilities for all operating leases. Upon adoption, the Company recognized ROUAs of $29 million and lease liabilities of $33 million . Operating lease liabilities are measured based on the present value of lease payments over the lease term. At the transition date, ROUA was determined by adjusting lease liabilities for the carrying balances of deferred rent under ASC Topic 840 Leases , cease-use liabilities under ASC Topic 420 Exit or Disposal Cost Obligations , and assets and liabilities recognized under ASC Topic 805 Business Combinations for acquired operating leases, which aggregated to $4 million . We determine if an arrangement is a lease at the inception of a lease. ROUAs represent our right to use the underlying asset and lease liabilities represent our obligation to make lease payments for the lease term. Operating lease ROUAs and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. As most of our leases do not provide an implicit rate, we use our incremental borrowing rate based on the appropriate term and information available at commencement date in determining the present value of lease payments. The lease term may include options to extend the lease when it is reasonably certain that we will exercise that option. ROUAs and operating lease liabilities are reported in Other Assets and Other Liabilities, respectively, in the Consolidated Balance Sheet. Lease expense for lease payments is recognized on a straight-line basis over the lease term. The Company elected certain practical expedients offered by the FASB for all classes of leased assets. As a result, the Company has not reassessed whether existing contracts are or contain leases, nor has the Company reassessed the classification of existing leases. The Company elected not to separate lease and non-lease components and instead accounts for them as a single lease component. The Company also elected to exclude short-term leases from the recognition of ROUAs and lease liabilities. Therefore, if the lease term is equal to or less than twelve months (including the renewal options that we are reasonably certain to exercise) and we are not reasonably certain to exercise any available purchase options in the lease, we do not apply the new lease accounting guidance for those leases. The Company did not elect the hindsight practical expedient, which allows entities to use hindsight when determining lease term and impairment of ROUAs. On January 1, 2019, we adopted ASU 2017-12 “Derivatives and Hedging" (Topic 815): Targeted Improvements to Accounting for Hedging Activities. Upon adoption, we reclassified certain debt securities from held to maturity to available for sale. The following table summarizes the impact: January 1, 2019 (In thousands) Amortized Cost Net Unrealized Gain (Loss) Reflected in OCI Fair Value Private mortgage-backed securities and collateralized mortgage obligations $ 21,526 $ 147 $ 21,673 Collateralized loan obligations 32,000 (877 ) 31,123 Totals $ 53,526 $ (730 ) $ 52,796 The following provides a brief description of accounting standards that have been issued but are not yet adopted that could have a material effect on the Company's financial statements: ASU 2016-13, Financial Instruments –Credit Losses (Topic 326) Description In June 2016, FASB issued guidance to replace the incurred loss model with an expected loss model, which is referred to as the current expected credit loss (CECL) model. The CECL model is applicable to the measurement of credit losses on financial assets measured at amortized cost, including loan receivables and held to maturity debt securities. It also applies to off-balance sheet credit exposures not accounted for as insurance (i.e. loan commitments, standby letters of credit, financial guarantees and other similar instruments). Date of Adoption This amendment is effective for SEC registrants that are not Smaller Reporting Companies, including the Company, for reporting periods beginning after December 15, 2019, including interim periods within that reporting period. Effect on the Consolidated Financial Statements The Company continues to validate and refine the credit loss estimation techniques and related processes that have been developed under the direction of the Company's transition oversight committee. Updates to business processes and the documentation of accounting policy decisions are ongoing. A validation of the CECL model has been completed by a third party and the the Company is currently conducting parallel runs of the CECL model process. The Company expects to recognize an increase in the allowance for credit losses upon adoption, which will be recorded as a one-time cumulative adjustment to retained earnings at the adoption date, January 1, 2020. The magnitude of the increase, however, has not yet been determined. The expected increase is primarily attributed to the impact of the new guidance on the Company’s acquired loan portfolio. For loans currently classified as purchased unimpaired (“PUL”), the CECL standard requires a reserve for expected credit losses to be established regardless of the impact of a purchase discount on the amortized cost basis. The accounting for existing PUL purchase discounts and premiums is not affected by the standard, and these will continue to accrete into interest income over the remaining lives of the loans on a level yield basis. Existing purchased credit impaired (“PCI”) loans will be classified as purchased credit deteriorated (“PCD”) loans and a reserve for expected credit losses will be established. The impact at adoption will be influenced by the outcome of our continuing review of the model, assumptions, methodologies and judgments, and by the loan portfolio composition and by macroeconomic conditions and forecasts at the adoption date. Additionally, the CECL model could produce higher volatility in the quarterly provision for credit losses than our current reserve process. The Company does not expect adoption of the standard to materially impact its held to maturity debt security portfolio, which is comprised of securities guaranteed either explicitly or implicitly by government sponsored entities. While available for sale (“AFS”) securities are not subject to the CECL allowance requirement, the new guidance requires the Company to record an allowance for AFS securities in an unrealized loss position if a portion of the unrealized loss is credit related. The Company does not expect a material impact to AFS securities upon adoption. ASU 2017-04, Intangibles – Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Description In January 2017, the FASB amended the existing guidance to simplify the goodwill impairment measurement test by eliminating Step 2. The amendment requires the Company to perform the goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount and recognizing an impairment charge for the amount by which the carrying amount exceeds the fair value. Additionally, an entity should consider the tax effects from any tax deductible goodwill on the carrying amount when measuring the impairment loss. Date of Adoption This amendment is effective for public business entities for reporting periods beginning after December 15, 2019, including interim periods within that reporting period. Early adoption is permitted on annual goodwill impairment tests performed after January 1, 2017. Effect on the Consolidated Financial Statements The impact to the Company's consolidated financial statements from the adoption of this pronouncement is not expected to be material.
Use of Estimates	Use of Estimates: The preparation of these condensed consolidated financial statements requires management to make judgments in the application of certain of its accounting policies that involve significant estimates and assumptions. We have established policies and control procedures that are intended to ensure valuation methods are well controlled and applied consistently from period to period. These estimates and assumptions, which may materially affect the reported amounts of certain assets, liabilities, revenues and expenses, are based on information available as of the date of the financial statements, and changes in this information over time and the use of revised estimates and assumptions could materially affect amounts reported in subsequent financial statements. Specific areas, among others, requiring the application of management’s estimates include determination of the allowance for loan losses, acquisition accounting and purchased loans, intangible assets and impairment testing, other fair value adjustments, other than temporary impairment of securities, income taxes and realization of deferred tax assets and contingent liabilities.

Basis of Presentation (Tables)

Basis of Presentation (Tables)	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Schedule of Reclassification of Debt Securities	Upon adoption, we reclassified certain debt securities from held to maturity to available for sale. The following table summarizes the impact: January 1, 2019 (In thousands) Amortized Cost Net Unrealized Gain (Loss) Reflected in OCI Fair Value Private mortgage-backed securities and collateralized mortgage obligations $ 21,526 $ 147 $ 21,673 Collateralized loan obligations 32,000 (877 ) 31,123 Totals $ 53,526 $ (730 ) $ 52,796

Earnings per Share (Tables)

Earnings per Share (Tables)	9 Months Ended
	Sep. 30, 2019
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	Three Months Ended September 30, Nine Months Ended September 30, (Dollars in thousands, except per share data) 2019 2018 2019 2018 Basic earnings per share Net income $ 25,605 $ 16,322 $ 71,563 $ 51,313 Average common shares outstanding 51,473 47,205 51,426 47,108 Net income per share $ 0.50 $ 0.35 $ 1.39 $ 1.09 Diluted earnings per share Net income $ 25,605 $ 16,322 $ 71,563 $ 51,313 Average common shares outstanding 51,473 47,205 51,426 47,108 Add: Dilutive effect of employee restricted stock and stock options 462 824 570 795 Average diluted shares outstanding 51,935 48,029 51,996 47,903 Net income per share $ 0.49 $ 0.34 $ 1.38 $ 1.07

Securities (Tables)

Securities (Tables)	9 Months Ended
	Sep. 30, 2019
Investments, Debt and Equity Securities [Abstract]
Summary of Amortized Cost and Fair Value of Securities Available for Sale	The amortized cost, gross unrealized gains and losses and fair value of securities available for sale and held to maturity at September 30, 2019 and December 31, 2018 are summarized as follows: September 30, 2019 (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Debt securities available for sale U.S. Treasury securities and obligations of U.S. government agencies $ 10,206 $ 319 $ (1 ) $ 10,524 Mortgage-backed securities and collateralized mortgage obligations of U.S. government sponsored entities 562,270 12,096 (520 ) 573,846 Private mortgage-backed securities and collateralized mortgage obligations 60,809 1,808 (17 ) 62,600 Collateralized loan obligations 241,387 1 (1,402 ) 239,986 Obligations of state and political subdivisions 32,506 1,349 — 33,855 Totals $ 907,178 $ 15,573 $ (1,940 ) $ 920,811 Debt securities held to maturity Mortgage-backed securities of U.S. government sponsored entities $ 273,644 $ 3,930 $ (1,505 ) $ 276,069 Totals $ 273,644 $ 3,930 $ (1,505 ) $ 276,069 December 31, 2018 (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Debt securities available for sale U.S. Treasury securities and obligations of U.S. government agencies $ 7,200 $ 106 $ (6 ) $ 7,300 Mortgage-backed securities and collateralized mortgage obligations of U.S. government sponsored entities 567,753 300 (14,047 ) 554,006 Private mortgage-backed securities and collateralized mortgage obligations 55,569 560 (401 ) 55,728 Collateralized loan obligations 212,807 1 (3,442 ) 209,366 Obligations of state and political subdivisions 39,543 339 (451 ) 39,431 Totals $ 882,872 $ 1,306 $ (18,347 ) $ 865,831 Debt securities held to maturity Mortgage-backed securities of U.S. government sponsored entities $ 304,423 $ — $ (7,324 ) $ 297,099 Private mortgage-backed securities and collateralized mortgage obligations 21,526 277 (130 ) 21,673 Collateralized loan obligations 32,000 — (877 ) 31,123 Totals $ 357,949 $ 277 $ (8,331 ) $ 349,895
Summary of Amortized Cost and Fair Value of Held-to-Maturity Securities	The amortized cost, gross unrealized gains and losses and fair value of securities available for sale and held to maturity at September 30, 2019 and December 31, 2018 are summarized as follows: September 30, 2019 (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Debt securities available for sale U.S. Treasury securities and obligations of U.S. government agencies $ 10,206 $ 319 $ (1 ) $ 10,524 Mortgage-backed securities and collateralized mortgage obligations of U.S. government sponsored entities 562,270 12,096 (520 ) 573,846 Private mortgage-backed securities and collateralized mortgage obligations 60,809 1,808 (17 ) 62,600 Collateralized loan obligations 241,387 1 (1,402 ) 239,986 Obligations of state and political subdivisions 32,506 1,349 — 33,855 Totals $ 907,178 $ 15,573 $ (1,940 ) $ 920,811 Debt securities held to maturity Mortgage-backed securities of U.S. government sponsored entities $ 273,644 $ 3,930 $ (1,505 ) $ 276,069 Totals $ 273,644 $ 3,930 $ (1,505 ) $ 276,069 December 31, 2018 (In thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Debt securities available for sale U.S. Treasury securities and obligations of U.S. government agencies $ 7,200 $ 106 $ (6 ) $ 7,300 Mortgage-backed securities and collateralized mortgage obligations of U.S. government sponsored entities 567,753 300 (14,047 ) 554,006 Private mortgage-backed securities and collateralized mortgage obligations 55,569 560 (401 ) 55,728 Collateralized loan obligations 212,807 1 (3,442 ) 209,366 Obligations of state and political subdivisions 39,543 339 (451 ) 39,431 Totals $ 882,872 $ 1,306 $ (18,347 ) $ 865,831 Debt securities held to maturity Mortgage-backed securities of U.S. government sponsored entities $ 304,423 $ — $ (7,324 ) $ 297,099 Private mortgage-backed securities and collateralized mortgage obligations 21,526 277 (130 ) 21,673 Collateralized loan obligations 32,000 — (877 ) 31,123 Totals $ 357,949 $ 277 $ (8,331 ) $ 349,895
Summary of Investments Classified by Contractual Maturity	Securities not due at a single maturity date are shown separately. Held to Maturity Available for Sale (In thousands) Amortized Cost Fair Value Amortized Cost Fair Value Due in less than one year $ — $ — $ 10,047 $ 10,069 Due after one year through five years — — 134,560 134,537 Due after five years through ten years — — 131,057 130,712 Due after ten years — — 8,435 9,047 — — 284,099 284,365 Mortgage-backed securities and collateralized mortgage obligations of U.S. government sponsored entities 273,644 276,069 562,270 573,846 Private mortgage-backed securities and collateralized mortgage obligations — — 60,809 62,600 Totals $ 273,644 $ 276,069 $ 907,178 $ 920,811
Schedule of Debt Securities in Unrealized Loss Position	The tables below indicate the fair value of debt securities with unrealized losses and the period of time for which these losses were outstanding at September 30, 2019 and December 31, 2018 , respectively. September 30, 2019 Less Than 12 Months 12 Months or Longer Total (In thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses U.S. Treasury securities and obligations of U.S. government agencies $ 438 (1 ) $ — $ — $ 438 $ (1 ) Mortgage-backed securities and collateralized mortgage obligations of U.S. government sponsored entities 83,139 (383 ) 115,545 (1,642 ) 198,684 (2,025 ) Private mortgage-backed securities and collateralized mortgage obligations 8,010 (17 ) — — 8,010 (17 ) Collateralized loan obligations 118,668 (568 ) 110,516 (834 ) 229,184 (1,402 ) Totals $ 210,255 $ (969 ) $ 226,061 $ (2,476 ) $ 436,316 $ (3,445 ) December 31, 2018 Less Than 12 Months 12 Months or Longer Total (In thousands) Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses U.S. Treasury securities and obligations of U.S. government agencies $ 99 $ (1 ) $ 642 $ (5 ) $ 741 $ (6 ) Mortgage-backed securities and collateralized mortgage obligations of U.S. government sponsored entities 200,184 (2,235 ) 623,420 (19,136 ) 823,604 (21,371 ) Private mortgage-backed securities and collateralized mortgage obligations 20,071 (344 ) 12,739 (187 ) 32,810 (531 ) Collateralized loan obligations 238,894 (4,319 ) — — 238,894 (4,319 ) Obligations of state and political subdivisions 19,175 (241 ) 9,553 (210 ) 28,728 (451 ) Totals $ 478,423 $ (7,140 ) $ 646,354 $ (19,538 ) $ 1,124,777 $ (26,678 )

Loans (Tables)

Loans (Tables)	9 Months Ended
	Sep. 30, 2019
Receivables [Abstract]
Schedule of Portfolio Loans, Purchased Credit Impaired Loans and Purchased Unimpaired Loans	Information pertaining to portfolio loans, purchased credit impaired (“PCI”) loans, and purchased unimpaired loans (“PUL”) is as follows: September 30, 2019 (In thousands) Portfolio Loans PCI Loans PULs Total Construction and land development $ 272,915 $ 158 $ 53,251 $ 326,324 Commercial real estate 1,709,227 10,259 590,881 2,310,367 Residential real estate 1,184,579 2,364 223,003 1,409,946 Commercial and financial 635,153 600 86,533 722,286 Consumer 208,425 — 8,941 217,366 Totals 1 $ 4,010,299 $ 13,381 $ 962,609 $ 4,986,289 December 31, 2018 (In thousands) Portfolio Loans PCI Loans PULs Total Construction and land development $ 301,473 $ 151 $ 141,944 $ 443,568 Commercial real estate 1,437,989 10,828 683,249 2,132,066 Residential real estate 1,055,525 2,718 266,134 1,324,377 Commercial and financial 603,057 737 118,528 722,322 Consumer 190,207 — 12,674 202,881 Totals 1 $ 3,588,251 $ 14,434 $ 1,222,529 $ 4,825,214 1 Net loan balances as of September 30, 2019 and December 31, 2018 include deferred costs of $18.7 million and $16.9 million for each period, respectively.
Schedule of Past Due Financing Receivables	The following tables present the contractual delinquency of the recorded investment by class of loans as of: September 30, 2019 (In thousands) Current Accruing 30-59 Days Past Due Accruing 60-89 Days Past Due Accruing Greater Than 90 Days Nonaccrual Total Financing Receivables Portfolio Loans Construction and land development $ 266,815 $ 1,747 $ — $ — $ 4,353 $ 272,915 Commercial real estate 1,702,928 1,271 599 — 4,429 1,709,227 Residential real estate 1,173,158 3,349 182 — 7,890 1,184,579 Commercial and financial 627,056 4,448 — — 3,649 635,153 Consumer 207,467 572 306 — 80 208,425 Total Portfolio Loans 3,977,424 11,387 1,087 — 20,401 4,010,299 Purchased Unimpaired Loans Construction and land development 49,682 — 2,995 — 574 53,251 Commercial real estate 587,865 872 848 — 1,296 590,881 Residential real estate 222,383 75 122 — 423 223,003 Commercial and financial 84,614 1,362 — — 557 86,533 Consumer 8,796 116 — — 29 8,941 Total PULs 953,340 2,425 3,965 — 2,879 962,609 Purchased Credit Impaired Loans Construction and land development 145 — — — 13 158 Commercial real estate 9,314 — — — 945 10,259 Residential real estate 573 — — — 1,791 2,364 Commercial and financial 585 — — — 15 600 Consumer — — — — — — Total PCI Loans 10,617 — — — 2,764 13,381 Total Loans $ 4,941,381 $ 13,812 $ 5,052 $ — $ 26,044 $ 4,986,289 December 31, 2018 (In thousands) Current Accruing 30-59 Days Past Due Accruing 60-89 Days Past Due Accruing Greater Than 90 Days Nonaccrual Total Financing Receivables Portfolio Loans Construction and land development $ 301,348 $ 97 $ — $ — $ 28 $ 301,473 Commercial real estate 1,427,413 3,852 97 141 6,486 1,437,989 Residential real estate 1,044,375 2,524 525 295 7,806 1,055,525 Commercial and financial 594,930 5,186 1,661 — 1,280 603,057 Consumer 189,061 637 326 — 183 190,207 Total Portfolio Loans 3,557,127 12,296 2,609 436 15,783 3,588,251 Purchased Unimpaired Loans Construction and land development 140,013 1,931 — — — 141,944 Commercial real estate 680,060 1,846 — — 1,343 683,249 Residential real estate 260,781 1,523 — 90 3,740 266,134 Commercial and financial 116,173 342 — — 2,013 118,528 Consumer 12,643 — 31 — — 12,674 Total PULs 1,209,670 5,642 31 90 7,096 1,222,529 Purchased Credit Impaired Loans Construction and land development 135 — — — 16 151 Commercial real estate 8,403 1,034 — — 1,391 10,828 Residential real estate 556 — — — 2,162 2,718 Commercial and financial 74 635 — — 28 737 Consumer — — — — — — Total PCI Loans 9,168 1,669 — — 3,597 14,434 Total Loans $ 4,775,965 $ 19,607 $ 2,640 $ 526 $ 26,476 $ 4,825,214
Schedule of Risk Categories of Loans by Class of Loans	The following tables present the risk category of loans by class based on the most recent analysis performed as of: September 30, 2019 (In thousands) Pass Special Mention Substandard Doubtful Total Construction and land development $ 316,636 $ 4,559 $ 5,129 $ — $ 326,324 Commercial real estate 2,260,472 27,838 21,736 321 2,310,367 Residential real estate 1,386,760 3,978 19,208 — 1,409,946 Commercial and financial 703,565 10,436 7,135 1,150 722,286 Consumer 212,955 3,417 994 — 217,366 Totals $ 4,880,388 $ 50,228 $ 54,202 $ 1,471 $ 4,986,289 December 31, 2018 (In thousands) Pass Special Mention Substandard Doubtful Total Construction and land development $ 428,044 $ 10,429 $ 5,095 $ — $ 443,568 Commercial real estate 2,063,589 41,429 27,048 — 2,132,066 Residential real estate 1,296,634 3,654 24,089 — 1,324,377 Commercial and financial 707,663 8,387 6,247 25 722,322 Consumer 198,367 3,397 1,117 — 202,881 Totals $ 4,694,297 $ 67,296 $ 63,596 $ 25 $ 4,825,214
Summary of Changes in Accretable Yield on PCI Loans	The table below summarizes the changes in accretable yield on PCI loans for the periods ended: Three Months Ended September 30, Nine Months Ended September 30, (In thousands) 2019 2018 2019 2018 Beginning balance $ 2,344 $ 3,189 $ 2,822 $ 3,699 Additions — — — — Deletions — — — (43 ) Accretion (287 ) (284 ) (1,336 ) (989 ) Reclassification from non-accretable difference 62 — 633 238 Ending balance $ 2,119 $ 2,905 $ 2,119 $ 2,905
Schedule of Impaired Financing Receivables, Excluding PCI Loans and Valuation Allowances	As of September 30, 2019 and December 31, 2018 , the Company’s recorded investment in impaired loans, excluding PCI loans, the unpaid principal balance and related valuation allowance was as follows: September 30, 2019 (In thousands) Recorded Investment Unpaid Principal Balance Related Valuation Allowance Impaired Loans with No Related Allowance Recorded: Construction and land development $ 4,972 $ 5,169 $ — Commercial real estate 6,222 7,649 — Residential real estate 9,727 14,223 — Commercial and financial 3,407 4,406 — Consumer 118 131 — Impaired Loans with an Allowance Recorded: Construction and land development 98 114 16 Commercial real estate 4,223 4,223 247 Residential real estate 4,888 5,035 517 Commercial and financial 1,948 1,963 727 Consumer 229 245 57 Total Impaired Loans Construction and land development 5,070 5,283 16 Commercial real estate 10,445 11,872 247 Residential real estate 14,615 19,258 517 Commercial and financial 5,355 6,369 727 Consumer 347 376 57 Totals $ 35,832 $ 43,158 $ 1,564 December 31, 2018 (In thousands) Recorded Investment Unpaid Principal Balance Related Valuation Allowance Impaired Loans with No Related Allowance Recorded: Construction and land development $ 15 $ 229 $ — Commercial real estate 3,852 5,138 — Residential real estate 13,510 18,111 — Commercial and financial 1,191 1,414 — Consumer 280 291 — Impaired Loans with an Allowance Recorded: Construction and land development 196 211 22 Commercial real estate 9,786 12,967 369 Residential real estate 5,537 5,664 805 Commercial and financial 2,131 2,309 1,498 Consumer 202 211 34 Total Impaired Loans Construction and land development 211 440 22 Commercial real estate 13,638 18,105 369 Residential real estate 19,047 23,775 805 Commercial and financial 3,322 3,723 1,498 Consumer 482 502 34 Totals $ 36,700 $ 46,545 $ 2,728

Allowance for Loan Losses (Tabl

Allowance for Loan Losses (Tables)	9 Months Ended
	Sep. 30, 2019
Receivables [Abstract]
Schedule of Allowance for Loan Losses	Activity in the allowance for loan losses for the three and nine month periods ended September 30, 2019 and 2018 is summarized as follows: Three Months Ended September 30, 2019 (In thousands) Beginning Balance Provision for Loan Losses Charge- Offs Recoveries TDR Allowance Adjustments Ending Balance Construction & land development $ 2,243 $ (395 ) $ — $ 6 $ — $ 1,854 Commercial real estate 11,870 1,368 (232 ) 10 (19 ) 12,997 Residential real estate 7,508 87 (38 ) 52 (20 ) 7,589 Commercial and financial 8,912 769 (1,625 ) 295 — 8,351 Consumer 2,972 422 (697 ) 118 (1 ) 2,814 Totals $ 33,505 $ 2,251 $ (2,592 ) $ 481 $ (40 ) $ 33,605 Three Months Ended September 30, 2018 (In thousands) Beginning Balance Provision for Loan Losses Charge- Offs Recoveries TDR Allowance Adjustments Ending Balance Construction & land development $ 2,287 $ (221 ) $ — $ 3 $ — $ 2,069 Commercial real estate 9,126 4,191 (1 ) 18 (16 ) 13,318 Residential real estate 8,850 (1,279 ) (6 ) 99 (19 ) 7,645 Commercial and financial 7,102 1,739 (842 ) 163 — 8,162 Consumer 1,559 1,344 (296 ) 65 (1 ) 2,671 Totals $ 28,924 $ 5,774 $ (1,145 ) $ 348 $ (36 ) $ 33,865 Nine Months Ended September 30, 2019 (In thousands) Beginning Balance Provision for Loan Losses Charge- Offs Recoveries TDR Allowance Adjustments Ending Balance Construction & land development $ 2,233 $ (391 ) $ — $ 13 $ (1 ) $ 1,854 Commercial real estate 11,112 1,560 (248 ) 622 (49 ) 12,997 Residential real estate 7,775 (276 ) (102 ) 242 (50 ) 7,589 Commercial and financial 8,585 3,736 (4,450 ) 480 — 8,351 Consumer 2,718 1,570 (1,915 ) 443 (2 ) 2,814 Totals $ 32,423 $ 6,199 $ (6,715 ) $ 1,800 $ (102 ) $ 33,605 Nine Months Ended September 30, 2018 (In thousands) Beginning Balance Provision for Loan Losses Charge- Offs Recoveries TDR Allowance Adjustments Ending Balance Construction & land development $ 1,642 $ 414 $ — $ 13 $ — $ 2,069 Commercial real estate 9,285 3,826 (15 ) 268 (46 ) 13,318 Residential real estate 7,131 (78 ) (33 ) 733 (108 ) 7,645 Commercial and financial 7,297 3,639 (2,985 ) 211 — 8,162 Consumer 1,767 1,587 (931 ) 251 (3 ) 2,671 Totals $ 27,122 $ 9,388 $ (3,964 ) $ 1,476 $ (157 ) $ 33,865
Schedule of Loan Portfolio, Excluding PCI Loans and Related Allowance	The Company’s loan portfolio, excluding PCI loans, and related allowance at September 30, 2019 and December 31, 2018 is shown in the following tables: September 30, 2019 Individually Evaluated for Impairment Collectively Evaluated for Impairment Total (In thousands) Recorded Investment Associated Allowance Recorded Investment Associated Allowance Recorded Investment Associated Allowance Construction & land development $ 5,070 $ 16 $ 321,096 $ 1,838 $ 326,166 $ 1,854 Commercial real estate 10,445 247 2,289,663 12,750 2,300,108 12,997 Residential real estate 14,615 517 1,392,967 7,072 1,407,582 7,589 Commercial and financial 5,355 727 716,331 7,624 721,686 8,351 Consumer 347 57 217,019 2,757 217,366 2,814 Totals $ 35,832 $ 1,564 $ 4,937,076 $ 32,041 $ 4,972,908 $ 33,605 December 31, 2018 Individually Evaluated for Impairment Collectively Evaluated for Impairment Total (In thousands) Recorded Investment Associated Allowance Recorded Investment Associated Allowance Recorded Investment Associated Allowance Construction & land development $ 211 $ 22 $ 443,206 $ 2,211 $ 443,417 $ 2,233 Commercial real estate 13,638 369 2,107,600 10,743 2,121,238 11,112 Residential real estate 19,047 805 1,302,612 6,970 1,321,659 7,775 Commercial and financial 3,322 1,498 718,263 7,087 721,585 8,585 Consumer 482 34 202,399 2,684 202,881 2,718 Totals $ 36,700 $ 2,728 $ 4,774,080 $ 29,695 $ 4,810,780 $ 32,423 The table below summarizes PCI loans that were individually evaluated for impairment based on expected cash flows at September 30, 2019 and December 31, 2018 : September 30, 2019 December 31, 2018 PCI Loans Individually Evaluated for Impairment (In thousands) Recorded Investment Associated Allowance Recorded Investment Associated Allowance Construction & land development $ 158 $ — $ 151 $ — Commercial real estate 10,259 — 10,828 — Residential real estate 2,364 — 2,718 — Commercial and financial 600 — 737 — Consumer — — — — Totals $ 13,381 $ — $ 14,434 $ —

Securities Sold Under Agreeme_2

Securities Sold Under Agreements to Repurchase (Tables)	9 Months Ended
	Sep. 30, 2019
Brokers and Dealers [Abstract]
Schedule of Securities Sold Under Agreements to Repurchase and Securities Pledged	Company securities sold under agreements to repurchase and securities pledged were as follows by collateral type and maturity as of: (In thousands) September 30, 2019 December 31, 2018 Fair value of pledged securities - overnight and continuous: Mortgage-backed securities and collateralized mortgage obligations of U.S. government sponsored entities $ 99,881 $ 246,829

Lease Commitments (Tables)

Lease Commitments (Tables)	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Schedule of Supplemental Lease Cost Information Related to Operating Leases	Lease cost for the three and nine months ended September 30, 2019 consists of: (In thousands) Three Months Ended September 30, 2019 Nine Months Ended September 30, 2019 Operating lease cost $ 1,385 $ 4,174 Variable lease cost 305 901 Short-term lease cost 154 574 Sublease income (179 ) (440 ) Total lease cost $ 1,665 $ 5,209
Schedule of Supplemental Balance Sheet Information Related to Operating Leases	The following table provides supplemental information related to leases as of and for the nine months ended September 30, 2019 : (In thousands, except for weighted average data) September 30, 2019 Operating lease right-of-use assets $ 26,355 Operating lease liabilities 30,381 Cash paid for amounts included in the measurement of operating lease liabilities 4,445 Right-of-use assets obtained in exchange for new operating lease obligations 353 Weighted average remaining lease term for operating leases 9 years Weighted average discount rate for operating leases 4.71 %
Schedule of Maturities of Lease Liabilities	Maturities of lease liabilities as of September 30, 2019 are as follows: Twelve Months Ended September 30, (In thousands) 2020 $ 5,765 2021 4,768 2022 4,493 2023 3,601 2024 3,542 Thereafter 15,360 Total undiscounted cash flows 37,529 Less: Net present value adjustment (7,148 ) Total $ 30,381

Noninterest Income and Expense

Noninterest Income and Expense (Tables)	9 Months Ended
	Sep. 30, 2019
Brokers and Dealers [Abstract]
Schedule of Noninterest Income and Expense	Details of noninterest income and expenses for the three and nine months ended September 30, 2019 and 2018 are as follows: Three Months Ended September 30, Nine Months Ended September 30, (In thousands) 2019 2018 2019 2018 Noninterest income Service charges on deposit accounts $ 2,978 $ 2,833 $ 8,569 $ 8,179 Trust fees 1,183 1,083 3,347 3,143 Mortgage banking fees 2,127 1,135 4,976 3,873 Brokerage commissions and fees 449 444 1,426 1,264 Marine finance fees 152 194 715 1,213 Interchange income 3,206 3,119 10,012 9,137 BOLI income 928 1,078 2,770 3,200 SBA gains 569 473 1,896 1,955 Other income 3,198 1,980 7,967 5,542 14,790 12,339 41,678 37,506 Securities losses, net (847 ) (48 ) (1,322 ) (198 ) Total $ 13,943 $ 12,291 $ 40,356 $ 37,308 Noninterest expense Salaries and wages $ 18,640 $ 17,129 $ 56,566 $ 48,939 Employee benefits 2,973 3,205 10,374 9,320 Outsourced data processing costs 3,711 3,493 11,432 10,565 Telephone/data lines 603 624 2,307 1,879 Occupancy 3,368 3,214 10,916 9,647 Furniture and equipment 1,528 1,367 4,829 4,292 Marketing 933 1,139 3,276 3,735 Legal and professional fees 1,648 2,019 6,528 6,293 FDIC assessments 56 431 881 1,624 Amortization of intangibles 1,456 1,004 4,370 2,997 Foreclosed property expense and net (gain)/loss on sale 262 (136 ) 48 461 Other 3,405 3,910 11,155 13,057 Total $ 38,583 $ 37,399 $ 122,682 $ 112,809

Fair Value (Tables)

Fair Value (Tables)	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Schedule of Fair Value of Assets Measured on Recurring and Nonrecurring Basis	Under ASC Topic 820, fair value measurements for items measured at fair value on a recurring and nonrecurring basis at September 30, 2019 and December 31, 2018 included: (In thousands) Fair Value Measurements Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) September 30, 2019 Available for sale debt securities 1 $ 920,811 $ 100 $ 920,711 $ — Loans held for sale 2 26,768 — 26,768 — Loans 3 4,606 — 1,737 2,869 Other real estate owned 4 13,593 — 241 13,352 Equity securities 5 6,422 6,422 — — December 31, 2018 Available for sale debt securities 1 $ 865,831 $ 100 $ 865,731 $ — Loans held for sale 2 11,873 — 11,873 — Loans 3 8,590 — 2,290 6,300 Other real estate owned 4 12,802 — 297 12,505 Equity securities 5 6,205 6,205 — — 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 E. 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 Topic 310. 4 Fair value is measured on a nonrecurring basis in accordance with ASC Topic 360. 5 An investment in shares of a mutual fund that invests primarily in CRA-qualified debt securities, reported at fair value in Other Assets. Recurring fair value basis is determined using market quotations.
Schedule of Aggregate Fair Value and Contractual Balance of Loans for Sale	The aggregate fair value and contractual balance of loans held for sale as of September 30, 2019 and December 31, 2018 is as follows: (In thousands) September 30, 2019 December 31, 2018 Aggregate fair value $ 26,768 $ 11,873 Contractual balance 25,803 11,562 Excess 965 311
Schedule of Carrying Amount and Fair Value of Other Significant Financial Instruments Not Measured on a Recurring Basis	The carrying amount and fair value of the Company’s other financial instruments that were not disclosed previously in the balance sheet and for which carrying amount is not fair value as of September 30, 2019 and December 31, 2018 is as follows: (In thousands) Carrying Amount Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) September 30, 2019 Financial Assets Debt securities held to maturity 1 $ 273,644 $ — $ 276,069 $ — Time deposits with other banks 4,579 — — 4,473 Loans, net 4,948,078 — — 4,961,833 Financial Liabilities Deposit liabilities 5,673,141 — — 5,672,972 Federal Home Loan Bank (FHLB) borrowings 50,000 — — 49,996 Subordinated debt 71,014 — 61,160 — December 31, 2018 Financial Assets Debt securities held to maturity 1 $ 357,949 $ — $ 349,895 $ — Time deposits with other banks 8,243 — — 8,132 Loans, net 4,784,201 — — 4,835,248 Financial Liabilities Deposit liabilities 5,177,240 — — 5,172,098 Federal Home Loan Bank (FHLB) borrowings 380,000 — — 380,027 Subordinated debt 70,804 — 61,224 — 1 See Note D for further detail of individual investment categories.

Business Combinations (Tables)

Business Combinations (Tables)	9 Months Ended
	Sep. 30, 2019
Business Combinations [Abstract]
Schedule of Purchase Price Calculation	(In thousands, except per share data) October 19, 2018 Shares exchanged for cash $ 5,462 Per share exchange ratio 0.7324 Number of shares of common stock issued 4,000 Multiplied by common stock price per share on October 19, 2018 $ 26.87 Value of common stock issued 107,486 Cash paid for First Green vested stock options 6,558 Total purchase price $ 114,044
Schedule of Business Acquisitions	The adjustments reflected in the table below are the result of information obtained subsequent to the initial measurement. (In thousands) Initially Measured October 19, 2018 Measurement Period Adjustments As Adjusted October 19, 2018 Assets: Cash $ 29,434 $ — $ 29,434 Investment securities 32,145 — 32,145 Loans, net 631,497 — 631,497 Fixed assets 16,828 — 16,828 Other real estate owned 410 — 410 Core deposit intangibles 10,170 (678 ) 9,492 Goodwill 56,198 532 56,730 Other assets 40,669 181 40,850 Totals $ 817,351 $ 35 $ 817,386 Liabilities: Deposits $ 624,289 $ — $ 624,289 Other liabilities 79,018 35 79,053 Totals $ 703,307 $ 35 $ 703,342
Schedule of Fair Value of Acquired Loans and Unpaid Principal Balance	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. October 19, 2018 (In thousands) Book Balance Fair Value Loans: Single family residential real estate $ 101,674 $ 101,119 Commercial real estate 437,767 406,613 Construction/development/land 61,195 58,385 Commercial loans 56,288 54,973 Consumer and other loans 9,156 8,942 Purchased Credit Impaired 2,136 1,465 Total acquired loans $ 668,216 $ 631,497
Schedule of Contractually Required Principal and Interest Payments Adjusted for Estimated Prepayments	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 October 19, 2018 for PCI loans. Contractually required principal and interest payments have been adjusted for estimated prepayments. (In thousands) October 19, 2018 Contractually required principal and interest $ 2,136 Non-accretable difference (671 ) Cash flows expected to be collected 1,465 Accretable yield — Total purchased credit-impaired loans acquired $ 1,465
Schedule of Pro-Forma Data	Pro-forma data for the three and nine months ended September 30, 2018 presents information as if the acquisition of First Green occurred at the beginning of 2018 , as follows: (In thousands, except per share amounts) Three Months Ended September 30, 2018 Nine Months Ended September 30, 2018 Net interest income $ 59,670 $ 174,416 Net income 21,070 64,440 EPS - basic $ 0.41 $ 1.26 EPS - diluted 0.40 1.24

Basis of Presentation - Narrati

Basis of Presentation - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019
Accounting Policies [Line Items]
Operating lease right-of-use assets	$ 26,355
Operating lease liabilities	$ 30,381
Accounting Standards Update 2016-02
Accounting Policies [Line Items]
Operating lease right-of-use assets		$ 29,000
Operating lease liabilities		33,000
Right-of-use assets recognized from acquired operating leases		4,000
Liabilities recognized from acquired operating leases		$ 4,000

Basis of Presentation - Schedul

Basis of Presentation - Schedule of Reclassification of Debt Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 907,178		$ 882,872
Securities available for sale (at fair value)	920,811		865,831
Private mortgage-backed securities and collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	60,809		55,569
Securities available for sale (at fair value)	62,600		55,728
Collateralized loan obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	241,387		212,807
Securities available for sale (at fair value)	$ 239,986		$ 209,366
Accounting Standards Update 2017-12
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		$ 53,526
Net Unrealized Gain (Loss) Reflected in OCI		(730)
Securities available for sale (at fair value)		52,796
Accounting Standards Update 2017-12 | Private mortgage-backed securities and collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		21,526
Net Unrealized Gain (Loss) Reflected in OCI		147
Securities available for sale (at fair value)		21,673
Accounting Standards Update 2017-12 | Collateralized loan obligations
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		32,000
Net Unrealized Gain (Loss) Reflected in OCI		(877)
Securities available for sale (at fair value)		$ 31,123

Earnings per Share - Narrative

Earnings per Share - Narrative (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Earnings Per Share [Abstract]
Antidilutive securities excluded from diluted earnings per share calculation (in shares)	492,000	481,000	492,000	412,000

Earnings per Share - Schedule o

Earnings per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Basic earnings per share
Net income	$ 25,605	$ 16,322	$ 71,563	$ 51,313
Average common shares outstanding (in shares)	51,473	47,205	51,426	47,108
Net income per share (in dollars per share)	$ 0.50	$ 0.35	$ 1.39	$ 1.09
Diluted earnings per share
Average common shares outstanding (in shares)	51,473	47,205	51,426	47,108
Add: Dilutive effect of employee restricted stock and stock options (in shares)	462	824	570	795
Average diluted shares outstanding (in shares)	51,935	48,029	51,996	47,903
Net income per share (in dollars per share)	$ 0.49	$ 0.34	$ 1.38	$ 1.07

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, 2019	Dec. 31, 2018
Debt securities available for sale
Available for sale, amortized cost, total	$ 907,178	$ 882,872
Available for sale, gross unrealized gains	15,573	1,306
Available for sale, gross unrealized losses	(1,940)	(18,347)
Available for sale, fair value	920,811	865,831
Debt securities held to maturity
Held to maturity, amortized cost, total	273,644	357,949
Held to maturity, gross unrealized gains	3,930	277
Held to maturity, gross unrealized losses	(1,505)	(8,331)
Held to maturity, fair value	276,069	349,895
U.S. Treasury securities and obligations of U.S. government agencies
Debt securities available for sale
Available for sale, amortized cost, total	10,206	7,200
Available for sale, gross unrealized gains	319	106
Available for sale, gross unrealized losses	(1)	(6)
Available for sale, fair value	10,524	7,300
Mortgage-backed securities and collateralized mortgage obligations of U.S. government sponsored entities
Debt securities available for sale
Available for sale, amortized cost, total	562,270	567,753
Available for sale, gross unrealized gains	12,096	300
Available for sale, gross unrealized losses	(520)	(14,047)
Available for sale, fair value	573,846	554,006
Debt securities held to maturity
Held to maturity, amortized cost, total	273,644	304,423
Held to maturity, gross unrealized gains	3,930	0
Held to maturity, gross unrealized losses	(1,505)	(7,324)
Held to maturity, fair value	276,069	297,099
Private mortgage-backed securities and collateralized mortgage obligations
Debt securities available for sale
Available for sale, amortized cost, total	60,809	55,569
Available for sale, gross unrealized gains	1,808	560
Available for sale, gross unrealized losses	(17)	(401)
Available for sale, fair value	62,600	55,728
Debt securities held to maturity
Held to maturity, amortized cost, total		21,526
Held to maturity, gross unrealized gains		277
Held to maturity, gross unrealized losses		(130)
Held to maturity, fair value	0	21,673
Collateralized loan obligations
Debt securities available for sale
Available for sale, amortized cost, total	241,387	212,807
Available for sale, gross unrealized gains	1	1
Available for sale, gross unrealized losses	(1,402)	(3,442)
Available for sale, fair value	239,986	209,366
Debt securities held to maturity
Held to maturity, amortized cost, total		32,000
Held to maturity, gross unrealized gains		0
Held to maturity, gross unrealized losses		(877)
Held to maturity, fair value		31,123
Obligations of state and political subdivisions
Debt securities available for sale
Available for sale, amortized cost, total	32,506	39,543
Available for sale, gross unrealized gains	1,349	339
Available for sale, gross unrealized losses	0	(451)
Available for sale, fair value	$ 33,855	$ 39,431

Securities - Narrative (Details

Securities - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Jan. 01, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Proceeds from sale of debt securities available for sale	$ 49,600		$ 122,906	$ 0
Gross losses from sale of securities	900		1,800
Gross gains from sale of securities			300
Gain (loss) on investment in shares of mutual funds	(847)	$ (48)	(1,322)	(198)
Held to maturity, amortized cost	907,178		907,178			$ 882,872
Unrealized losses from securities transferred from available for sale to held to maturity			3,100
Unamortized balance of securities transferred from available for sale to held to maturity	400		400
Unrealized losses on mortgage backed securities of government sponsored entities	3,445		3,445			26,678
Fair value of securities in unrealized loss position	436,316		436,316			1,124,777
Federal Home Loan Bank and Federal Reserve stock recorded in other assets	$ 33,000		$ 33,000
Visa | Common Class B
Debt Securities, Available-for-sale [Line Items]
Shares of Visa stock held (in shares)	11,330		11,330
Visa | Common Class A
Debt Securities, Available-for-sale [Line Items]
Conversion rate of Class A stock for each share of Class B stock (in dollars per share)	$ 1.6228		$ 1.6228
Shares issued (in shares)			18,386
Accounting Standards Update 2017-12
Debt Securities, Available-for-sale [Line Items]
Held to maturity, amortized cost					$ 53,526
Unrealized losses recorded in other comprehensive income					700
CRA - Qualified Mutual Fund
Debt Securities, Available-for-sale [Line Items]
Gain (loss) on investment in shares of mutual funds	$ 100	$ (100)	$ 200	$ (200)
Investment in mutual fund carried at fair value	6,400		6,400
Public and Trust Deposits | Carrying Value
Debt Securities, Available-for-sale [Line Items]
Fair value of debt securities pledged as collateral	86,100		86,100
Repurchase Agreement | Carrying Value | Mortgage-backed securities and collateralized mortgage obligations of U.S. government sponsored entities
Debt Securities, Available-for-sale [Line Items]
Fair value of debt securities pledged as collateral	99,881		99,881			246,829
Mortgage-backed securities and collateralized mortgage obligations of U.S. government sponsored entities
Debt Securities, Available-for-sale [Line Items]
Held to maturity, amortized cost	562,270		562,270			567,753
Unrealized losses on mortgage backed securities of government sponsored entities	2,025		2,025			21,371
Fair value of securities in unrealized loss position	198,684		198,684			823,604
Collateralized loan obligations
Debt Securities, Available-for-sale [Line Items]
Held to maturity, amortized cost	241,387		241,387			212,807
Unrealized losses on mortgage backed securities of government sponsored entities	1,402		1,402			4,319
Fair value of securities in unrealized loss position	$ 229,184		$ 229,184			$ 238,894
Collateralized loan obligations | Accounting Standards Update 2017-12
Debt Securities, Available-for-sale [Line Items]
Held to maturity, amortized cost					$ 32,000

Securities - Amortized Cost a_2

Securities - Amortized Cost and Fair Value of Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Amortized Cost
Held to maturity, amortized cost, total	$ 273,644	$ 357,949
Fair Value
Held to maturity, fair value, total	276,069	349,895
Amortized Cost
Available for sale, amortized cost, total	907,178	882,872
Fair Value
Available for sale, fair value, total	920,811	865,831
Mortgage-backed securities and collateralized mortgage obligations of U.S. government sponsored entities
Amortized Cost
Held to maturity, amortized cost, total	273,644
Fair Value
Held to maturity, fair value, total	276,069	297,099
Amortized Cost
Available for sale, amortized cost, total	562,270	567,753
Fair Value
Available for sale, fair value, total	573,846	554,006
Private mortgage-backed securities and collateralized mortgage obligations
Amortized Cost
Held to maturity, amortized cost, total	0
Fair Value
Held to maturity, fair value, total	0	21,673
Amortized Cost
Available for sale, amortized cost, total	60,809	55,569
Fair Value
Available for sale, fair value, total	62,600	$ 55,728
Collateralized loan obligations
Amortized Cost
Held to maturity, amortized cost, due in less than one year	0
Held to maturity, amortized cost, due after one year through five years	0
Held to maturity, amortized cost, due after five years through ten years	0
Held to maturity, amortized cost, due after ten years	0
Held to maturity, amortized cost, total	0
Fair Value
Held to maturity, fair value, due in less than one year	0
Held to maturity, fair value, due after one year through five years	0
Held to maturity, fair value, due after five years through ten years	0
Held to maturity, fair value, due after ten years	0
Held to maturity, fair value, total	0
Amortized Cost
Available for sale, amortized cost, due in less than one year	10,047
Available for sale, amortized cost, due after one year through five years	134,560
Available for sale, amortized cost, due after five years through ten years	131,057
Available for sale, amortized cost, due after ten years	8,435
Available for sale, amortized cost, total	284,099
Fair Value
Available for sale, fair value, due in less than one year	10,069
Available for sale, fair value, due after one year through five years	134,537
Available for sale, fair value, due after five years through ten years	130,712
Available for sale, fair value, due after ten years	9,047
Available for sale, fair value, total	$ 284,365

Securities - Schedule of Unreal

Securities - Schedule of Unrealized Loss and Fair Value on Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Fair Value
Less Than 12 Months	$ 210,255	$ 478,423
12 Months or Longer	226,061	646,354
Total	436,316	1,124,777
Unrealized Losses
Less Than 12 Months	(969)	(7,140)
12 Months or Longer	(2,476)	(19,538)
Total	(3,445)	(26,678)
U.S. Treasury securities and obligations of U.S. government agencies
Fair Value
Less Than 12 Months	438	99
12 Months or Longer	0	642
Total	438	741
Unrealized Losses
Less Than 12 Months	(1)	(1)
12 Months or Longer	0	(5)
Total	(1)	(6)
Mortgage-backed securities and collateralized mortgage obligations of U.S. government sponsored entities
Fair Value
Less Than 12 Months	83,139	200,184
12 Months or Longer	115,545	623,420
Total	198,684	823,604
Unrealized Losses
Less Than 12 Months	(383)	(2,235)
12 Months or Longer	(1,642)	(19,136)
Total	(2,025)	(21,371)
Private mortgage-backed securities and collateralized mortgage obligations
Fair Value
Less Than 12 Months	8,010	20,071
12 Months or Longer	0	12,739
Total	8,010	32,810
Unrealized Losses
Less Than 12 Months	(17)	(344)
12 Months or Longer	0	(187)
Total	(17)	(531)
Collateralized loan obligations
Fair Value
Less Than 12 Months	118,668	238,894
12 Months or Longer	110,516	0
Total	229,184	238,894
Unrealized Losses
Less Than 12 Months	(568)	(4,319)
12 Months or Longer	(834)	0
Total	$ (1,402)	(4,319)
Obligations of state and political subdivisions
Fair Value
Less Than 12 Months		19,175
12 Months or Longer		9,553
Total		28,728
Unrealized Losses
Less Than 12 Months		(241)
12 Months or Longer		(210)
Total		$ (451)

Loans - Schedule of Portfolio L

Loans - Schedule of Portfolio Loans, Purchased Credit Impaired Loans and Purchased Unimpaired Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	$ 4,986,289	$ 4,825,214
Deferred costs	18,700	16,900
Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	326,324	443,568
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	2,310,367	2,132,066
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	1,409,946	1,324,377
Commercial and financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	722,286	722,322
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	217,366	202,881
Portfolio Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	4,010,299	3,588,251
Portfolio Loans | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	272,915	301,473
Portfolio Loans | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	1,709,227	1,437,989
Portfolio Loans | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	1,184,579	1,055,525
Portfolio Loans | Commercial and financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	635,153	603,057
Portfolio Loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	208,425	190,207
PCI Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	13,381	14,434
PCI Loans | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	158	151
PCI Loans | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	10,259	10,828
PCI Loans | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	2,364	2,718
PCI Loans | Commercial and financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	600	737
PCI Loans | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	0	0
PULs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	962,609	1,222,529
PULs | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	53,251	141,944
PULs | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	590,881	683,249
PULs | Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	223,003	266,134
PULs | Commercial and financial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	86,533	118,528
PULs | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	$ 8,941	$ 12,674

Loans - Past Due Financing Rece

Loans - Past Due Financing Receivables (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Financing Receivable, Past Due [Line Items]
Current	$ 4,941,381	$ 4,775,965
Nonaccrual	26,044	26,476
Total Financing Receivables	4,986,289	4,825,214
Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	13,812	19,607
Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	5,052	2,640
Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	526
Construction and land development
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	326,324	443,568
Commercial real estate
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	2,310,367	2,132,066
Residential real estate
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	1,409,946	1,324,377
Commercial and financial
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	722,286	722,322
Consumer
Financing Receivable, Past Due [Line Items]
Total Financing Receivables	217,366	202,881
Portfolio Loans
Financing Receivable, Past Due [Line Items]
Current	3,977,424	3,557,127
Nonaccrual	20,401	15,783
Total Financing Receivables	4,010,299	3,588,251
Portfolio Loans | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	11,387	12,296
Portfolio Loans | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	1,087	2,609
Portfolio Loans | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	436
Portfolio Loans | Construction and land development
Financing Receivable, Past Due [Line Items]
Current	266,815	301,348
Nonaccrual	4,353	28
Total Financing Receivables	272,915	301,473
Portfolio Loans | Construction and land development | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	1,747	97
Portfolio Loans | Construction and land development | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Portfolio Loans | Construction and land development | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Portfolio Loans | Commercial real estate
Financing Receivable, Past Due [Line Items]
Current	1,702,928	1,427,413
Nonaccrual	4,429	6,486
Total Financing Receivables	1,709,227	1,437,989
Portfolio Loans | Commercial real estate | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	1,271	3,852
Portfolio Loans | Commercial real estate | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	599	97
Portfolio Loans | Commercial real estate | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	141
Portfolio Loans | Residential real estate
Financing Receivable, Past Due [Line Items]
Current	1,173,158	1,044,375
Nonaccrual	7,890	7,806
Total Financing Receivables	1,184,579	1,055,525
Portfolio Loans | Residential real estate | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	3,349	2,524
Portfolio Loans | Residential real estate | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	182	525
Portfolio Loans | Residential real estate | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	295
Portfolio Loans | Commercial and financial
Financing Receivable, Past Due [Line Items]
Current	627,056	594,930
Nonaccrual	3,649	1,280
Total Financing Receivables	635,153	603,057
Portfolio Loans | Commercial and financial | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	4,448	5,186
Portfolio Loans | Commercial and financial | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	1,661
Portfolio Loans | Commercial and financial | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Portfolio Loans | Consumer
Financing Receivable, Past Due [Line Items]
Current	207,467	189,061
Nonaccrual	80	183
Total Financing Receivables	208,425	190,207
Portfolio Loans | Consumer | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	572	637
Portfolio Loans | Consumer | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	306	326
Portfolio Loans | Consumer | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Purchased Unimpaired Loans
Financing Receivable, Past Due [Line Items]
Current	953,340	1,209,670
Nonaccrual	2,879	7,096
Total Financing Receivables	962,609	1,222,529
Purchased Unimpaired Loans | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	2,425	5,642
Purchased Unimpaired Loans | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	3,965	31
Purchased Unimpaired Loans | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	90
Purchased Unimpaired Loans | Construction and land development
Financing Receivable, Past Due [Line Items]
Current	49,682	140,013
Nonaccrual	574	0
Total Financing Receivables	53,251	141,944
Purchased Unimpaired Loans | Construction and land development | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	1,931
Purchased Unimpaired Loans | Construction and land development | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	2,995	0
Purchased Unimpaired Loans | Construction and land development | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Purchased Unimpaired Loans | Commercial real estate
Financing Receivable, Past Due [Line Items]
Current	587,865	680,060
Nonaccrual	1,296	1,343
Total Financing Receivables	590,881	683,249
Purchased Unimpaired Loans | Commercial real estate | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	872	1,846
Purchased Unimpaired Loans | Commercial real estate | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	848	0
Purchased Unimpaired Loans | Commercial real estate | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Purchased Unimpaired Loans | Residential real estate
Financing Receivable, Past Due [Line Items]
Current	222,383	260,781
Nonaccrual	423	3,740
Total Financing Receivables	223,003	266,134
Purchased Unimpaired Loans | Residential real estate | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	75	1,523
Purchased Unimpaired Loans | Residential real estate | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	122	0
Purchased Unimpaired Loans | Residential real estate | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	90
Purchased Unimpaired Loans | Commercial and financial
Financing Receivable, Past Due [Line Items]
Current	84,614	116,173
Nonaccrual	557	2,013
Total Financing Receivables	86,533	118,528
Purchased Unimpaired Loans | Commercial and financial | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	1,362	342
Purchased Unimpaired Loans | Commercial and financial | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Purchased Unimpaired Loans | Commercial and financial | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Purchased Unimpaired Loans | Consumer
Financing Receivable, Past Due [Line Items]
Current	8,796	12,643
Nonaccrual	29	0
Total Financing Receivables	8,941	12,674
Purchased Unimpaired Loans | Consumer | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	116	0
Purchased Unimpaired Loans | Consumer | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	31
Purchased Unimpaired Loans | Consumer | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Purchased Credit Impaired Loans
Financing Receivable, Past Due [Line Items]
Current	10,617	9,168
Nonaccrual	2,764	3,597
Total Financing Receivables	13,381	14,434
Purchased Credit Impaired Loans | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	1,669
Purchased Credit Impaired Loans | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Purchased Credit Impaired Loans | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Purchased Credit Impaired Loans | Construction and land development
Financing Receivable, Past Due [Line Items]
Current	145	135
Nonaccrual	13	16
Total Financing Receivables	158	151
Purchased Credit Impaired Loans | Construction and land development | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Purchased Credit Impaired Loans | Construction and land development | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Purchased Credit Impaired Loans | Construction and land development | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Purchased Credit Impaired Loans | Commercial real estate
Financing Receivable, Past Due [Line Items]
Current	9,314	8,403
Nonaccrual	945	1,391
Total Financing Receivables	10,259	10,828
Purchased Credit Impaired Loans | Commercial real estate | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	1,034
Purchased Credit Impaired Loans | Commercial real estate | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Purchased Credit Impaired Loans | Commercial real estate | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Purchased Credit Impaired Loans | Residential real estate
Financing Receivable, Past Due [Line Items]
Current	573	556
Nonaccrual	1,791	2,162
Total Financing Receivables	2,364	2,718
Purchased Credit Impaired Loans | Residential real estate | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Purchased Credit Impaired Loans | Residential real estate | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Purchased Credit Impaired Loans | Residential real estate | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Purchased Credit Impaired Loans | Commercial and financial
Financing Receivable, Past Due [Line Items]
Current	585	74
Nonaccrual	15	28
Total Financing Receivables	600	737
Purchased Credit Impaired Loans | Commercial and financial | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	635
Purchased Credit Impaired Loans | Commercial and financial | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Purchased Credit Impaired Loans | Commercial and financial | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Purchased Credit Impaired Loans | Consumer
Financing Receivable, Past Due [Line Items]
Current	0	0
Nonaccrual	0	0
Total Financing Receivables	0	0
Purchased Credit Impaired Loans | Consumer | Accruing 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Purchased Credit Impaired Loans | Consumer | Accruing 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0	0
Purchased Credit Impaired Loans | Consumer | Accruing Greater Than 90 Days
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	$ 0	$ 0

Loans - Risk Categories of Loan

Loans - Risk Categories of Loans by Class of Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	$ 4,986,289	$ 4,825,214
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	4,880,388	4,694,297
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	50,228	67,296
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	54,202	63,596
Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	1,471	25
Construction and land development
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	326,324	443,568
Construction and land development | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	316,636	428,044
Construction and land development | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	4,559	10,429
Construction and land development | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	5,129	5,095
Construction and land development | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	2,310,367	2,132,066
Commercial real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	2,260,472	2,063,589
Commercial real estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	27,838	41,429
Commercial real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	21,736	27,048
Commercial real estate | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	321	0
Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	1,409,946	1,324,377
Residential real estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	1,386,760	1,296,634
Residential real estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	3,978	3,654
Residential real estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	19,208	24,089
Residential real estate | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	0	0
Commercial and financial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	722,286	722,322
Commercial and financial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	703,565	707,663
Commercial and financial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	10,436	8,387
Commercial and financial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	7,135	6,247
Commercial and financial | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	1,150	25
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	217,366	202,881
Consumer | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	212,955	198,367
Consumer | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	3,417	3,397
Consumer | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	994	1,117
Consumer | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Loans	$ 0	$ 0

Loans - Changes in Accretable Y

Loans - Changes in Accretable Yield on PCI Loans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Beginning balance	$ 2,344	$ 3,189	$ 2,822	$ 3,699
Additions	0	0	0	0
Deletions	0	0	0	(43)
Accretion	(287)	(284)	(1,336)	(989)
Reclassification from non-accretable difference	62	0	633	238
Ending balance	$ 2,119	$ 2,905	$ 2,119	$ 2,905

Loans - Narrative (Details)

Loans - Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019USD ($)contract	Sep. 30, 2018USD ($)contract	Sep. 30, 2019USD ($)contract	Sep. 30, 2018USD ($)contract	Sep. 30, 2019USD ($)contract	Sep. 30, 2018USD ($)contract	Dec. 31, 2018USD ($)
Receivables [Abstract]
Number of loans under trouble debt restructuring | contract	3	1	7	1	3	1
Value of loans under trouble debt restructuring	$ 1,600	$ 100	$ 4,000	$ 100	$ 2,100	$ 100
Troubled debt restructuring outstanding amount	12,400		12,400		$ 12,400		$ 13,300
Average impaired loans	35,100	38,100	35,500	34,500
Interest income recorded on impaired loans	700	500	1,500	1,400
Interest income related to impaired loans with impairment measured on present value of expected future cash flows	$ 40	$ 36	$ 102,000	$ 157,000

Loans - Impaired Financing Rece

Loans - Impaired Financing Receivables, Excluding PCI Loans and Valuation Allowances (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Recorded Investment
Total Impaired Loans	$ 35,832	$ 36,700
Unpaid Principal Balance
Total Impaired Loans	43,158	46,545
Related Valuation Allowance	1,564	2,728
Construction and land development
Recorded Investment
Impaired Loans with No Related Allowance Recorded	4,972	15
Impaired Loans with an Allowance Recorded	98	196
Total Impaired Loans	5,070	211
Unpaid Principal Balance
Impaired Loans with No Related Allowance Recorded	5,169	229
Impaired Loans with an Allowance Recorded	114	211
Total Impaired Loans	5,283	440
Related Valuation Allowance	16	22
Commercial real estate
Recorded Investment
Impaired Loans with No Related Allowance Recorded	6,222	3,852
Impaired Loans with an Allowance Recorded	4,223	9,786
Total Impaired Loans	10,445	13,638
Unpaid Principal Balance
Impaired Loans with No Related Allowance Recorded	7,649	5,138
Impaired Loans with an Allowance Recorded	4,223	12,967
Total Impaired Loans	11,872	18,105
Related Valuation Allowance	247	369
Residential real estate
Recorded Investment
Impaired Loans with No Related Allowance Recorded	9,727	13,510
Impaired Loans with an Allowance Recorded	4,888	5,537
Total Impaired Loans	14,615	19,047
Unpaid Principal Balance
Impaired Loans with No Related Allowance Recorded	14,223	18,111
Impaired Loans with an Allowance Recorded	5,035	5,664
Total Impaired Loans	19,258	23,775
Related Valuation Allowance	517	805
Commercial and financial
Recorded Investment
Impaired Loans with No Related Allowance Recorded	3,407	1,191
Impaired Loans with an Allowance Recorded	1,948	2,131
Total Impaired Loans	5,355	3,322
Unpaid Principal Balance
Impaired Loans with No Related Allowance Recorded	4,406	1,414
Impaired Loans with an Allowance Recorded	1,963	2,309
Total Impaired Loans	6,369	3,723
Related Valuation Allowance	727	1,498
Consumer
Recorded Investment
Impaired Loans with No Related Allowance Recorded	118	280
Impaired Loans with an Allowance Recorded	229	202
Total Impaired Loans	347	482
Unpaid Principal Balance
Impaired Loans with No Related Allowance Recorded	131	291
Impaired Loans with an Allowance Recorded	245	211
Total Impaired Loans	376	502
Related Valuation Allowance	$ 57	$ 34

Allowance for Loan Losses - Act

Allowance for Loan Losses - Activity in Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	$ 33,505	$ 28,924	$ 32,423	$ 27,122
Provision for Loan Losses	2,251	5,774	6,199	9,388
Charge- Offs	(2,592)	(1,145)	(6,715)	(3,964)
Recoveries	481	348	1,800	1,476
TDR Allowance Adjustments	(40)	(36)	(102)	(157)
Ending Balance	33,605	33,865	33,605	33,865
Construction & land development
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	2,243	2,287	2,233	1,642
Provision for Loan Losses	(395)	(221)	(391)	414
Charge- Offs	0	0	0	0
Recoveries	6	3	13	13
TDR Allowance Adjustments	0	0	(1)	0
Ending Balance	1,854	2,069	1,854	2,069
Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	11,870	9,126	11,112	9,285
Provision for Loan Losses	1,368	4,191	1,560	3,826
Charge- Offs	(232)	(1)	(248)	(15)
Recoveries	10	18	622	268
TDR Allowance Adjustments	(19)	(16)	(49)	(46)
Ending Balance	12,997	13,318	12,997	13,318
Residential real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	7,508	8,850	7,775	7,131
Provision for Loan Losses	87	(1,279)	(276)	(78)
Charge- Offs	(38)	(6)	(102)	(33)
Recoveries	52	99	242	733
TDR Allowance Adjustments	(20)	(19)	(50)	(108)
Ending Balance	7,589	7,645	7,589	7,645
Commercial and financial
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	8,912	7,102	8,585	7,297
Provision for Loan Losses	769	1,739	3,736	3,639
Charge- Offs	(1,625)	(842)	(4,450)	(2,985)
Recoveries	295	163	480	211
TDR Allowance Adjustments	0	0	0	0
Ending Balance	8,351	8,162	8,351	8,162
Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance	2,972	1,559	2,718	1,767
Provision for Loan Losses	422	1,344	1,570	1,587
Charge- Offs	(697)	(296)	(1,915)	(931)
Recoveries	118	65	443	251
TDR Allowance Adjustments	(1)	(1)	(2)	(3)
Ending Balance	$ 2,814	$ 2,671	$ 2,814	$ 2,671

Allowance for Loan Losses - Sch

Allowance for Loan Losses - Schedule of Loan Portfolio, Excluding PCI Loans and Related Allowance (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Recorded Investment
Individually Evaluated for Impairment	$ 35,832	$ 36,700
Collectively Evaluated for Impairment	4,937,076	4,774,080
Total	4,972,908	4,810,780
Associated Allowance
Individually Evaluated for Impairment	1,564	2,728
Collectively Evaluated for Impairment	32,041	29,695
Total	33,605	32,423
PCI Loans
Recorded Investment
Individually Evaluated for Impairment	13,381	14,434
Associated Allowance
Individually Evaluated for Impairment	0	0
Construction & land development
Recorded Investment
Individually Evaluated for Impairment	5,070	211
Collectively Evaluated for Impairment	321,096	443,206
Total	326,166	443,417
Associated Allowance
Individually Evaluated for Impairment	16	22
Collectively Evaluated for Impairment	1,838	2,211
Total	1,854	2,233
Construction & land development | PCI Loans
Recorded Investment
Individually Evaluated for Impairment	158	151
Associated Allowance
Individually Evaluated for Impairment	0	0
Commercial real estate
Recorded Investment
Individually Evaluated for Impairment	10,445	13,638
Collectively Evaluated for Impairment	2,289,663	2,107,600
Total	2,300,108	2,121,238
Associated Allowance
Individually Evaluated for Impairment	247	369
Collectively Evaluated for Impairment	12,750	10,743
Total	12,997	11,112
Commercial real estate | PCI Loans
Recorded Investment
Individually Evaluated for Impairment	10,259	10,828
Associated Allowance
Individually Evaluated for Impairment	0	0
Residential real estate
Recorded Investment
Individually Evaluated for Impairment	14,615	19,047
Collectively Evaluated for Impairment	1,392,967	1,302,612
Total	1,407,582	1,321,659
Associated Allowance
Individually Evaluated for Impairment	517	805
Collectively Evaluated for Impairment	7,072	6,970
Total	7,589	7,775
Residential real estate | PCI Loans
Recorded Investment
Individually Evaluated for Impairment	2,364	2,718
Associated Allowance
Individually Evaluated for Impairment	0	0
Commercial and financial
Recorded Investment
Individually Evaluated for Impairment	5,355	3,322
Collectively Evaluated for Impairment	716,331	718,263
Total	721,686	721,585
Associated Allowance
Individually Evaluated for Impairment	727	1,498
Collectively Evaluated for Impairment	7,624	7,087
Total	8,351	8,585
Commercial and financial | PCI Loans
Recorded Investment
Individually Evaluated for Impairment	600	737
Associated Allowance
Individually Evaluated for Impairment	0	0
Consumer
Recorded Investment
Individually Evaluated for Impairment	347	482
Collectively Evaluated for Impairment	217,019	202,399
Total	217,366	202,881
Associated Allowance
Individually Evaluated for Impairment	57	34
Collectively Evaluated for Impairment	2,757	2,684
Total	2,814	2,718
Consumer | PCI Loans
Recorded Investment
Individually Evaluated for Impairment	0	0
Associated Allowance
Individually Evaluated for Impairment	$ 0	$ 0

Allowance for Loan Losses - Nar

Allowance for Loan Losses - Narrative (Details) - Loans - Bank Shares, Inc - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Financing Receivable, Troubled Debt Restructuring [Line Items]
Remaining fair value adjustment for loans acquired	$ 36.3	$ 47
Percentage of fair value adjustment for loans acquired	3.80%	3.90%

Securities Sold Under Agreeme_3

Securities Sold Under Agreements to Repurchase - Schedule of Securities Sold Under Agreements to Repurchase and Securities Pledged (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Carrying Value | Repurchase Agreement | Mortgage-backed securities and collateralized mortgage obligations of U.S. government sponsored entities
Fair value of pledged securities - overnight and continuous:
Fair value of debt securities pledged as collateral	$ 99,881	$ 246,829

Lease Commitments - Lease Cost

Lease Commitments - Lease Cost Information Related to Operating Leases (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Leases [Abstract]
Operating lease cost	$ 1,385	$ 4,174
Variable lease cost	305	901
Short-term lease cost	154	574
Sublease income	(179)	(440)
Total lease cost	$ 1,665	$ 5,209

Lease Commitments - Supplementa

Lease Commitments - Supplemental Balance Sheet and Cash Flow Information Related to Operating Leases (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019USD ($)
Leases [Abstract]
Operating lease right-of-use assets	$ 26,355
Operating lease liabilities	30,381
Cash paid for amounts included in the measurement of operating lease liabilities	4,445
Right-of-use assets obtained in exchange for new operating lease obligations	$ 353
Weighted average remaining lease term for operating leases	9 years
Weighted average discount rate for operating leases	4.71%

Lease Commitments - Maturities

Lease Commitments - Maturities of Lease Liabilities (Details) $ in Thousands	Sep. 30, 2019USD ($)
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2020	$ 5,765
2021	4,768
2022	4,493
2023	3,601
2024	3,542
Thereafter	15,360
Total undiscounted cash flows	37,529
Less: Net present value adjustment	(7,148)
Total	$ 30,381

Noninterest Income and Expens_2

Noninterest Income and Expense - Summary of Noninterest Income and Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Noninterest income
Brokerage commissions and fees	$ 449	$ 444	$ 1,426	$ 1,264
Marine finance fees	152	194	715	1,213
Interchange income	3,206	3,119	10,012	9,137
BOLI income	928	1,078	2,770	3,200
SBA gains	569	473	1,896	1,955
Other income	3,198	1,980	7,967	5,542
Noninterest income, gross	14,790	12,339	41,678	37,506
Securities losses, net	(847)	(48)	(1,322)	(198)
Total	13,943	12,291	40,356	37,308
Noninterest expense
Salaries and wages	18,640	17,129	56,566	48,939
Employee benefits	2,973	3,205	10,374	9,320
Outsourced data processing costs	3,711	3,493	11,432	10,565
Telephone/data lines	603	624	2,307	1,879
Occupancy	3,368	3,214	10,916	9,647
Furniture and equipment	1,528	1,367	4,829	4,292
Marketing	933	1,139	3,276	3,735
Legal and professional fees	1,648	2,019	6,528	6,293
FDIC assessments	56	431	881	1,624
Amortization of intangibles	1,456	1,004	4,370	2,997
Foreclosed property expense and net (gain)/loss on sale	262	(136)	48	461
Other	3,405	3,910	11,155	13,057
Total	38,583	37,399	122,682	112,809
Service charges on deposit accounts
Noninterest income
Revenue from contracts with customers	2,978	2,833	8,569	8,179
Trust fees
Noninterest income
Revenue from contracts with customers	1,183	1,083	3,347	3,143
Mortgage banking fees
Noninterest income
Revenue from contracts with customers	$ 2,127	$ 1,135	$ 4,976	$ 3,873

Equity Capital - Narrative (Det

Equity Capital - Narrative (Details)	Sep. 30, 2019
Equity [Abstract]
Regulatory threshold for well-capitalized institutions	6.50%

Fair Value - Fair Value of Asse

Fair Value - Fair Value of Assets Measured on Recurring and Nonrecurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale, fair value	$ 920,811	$ 865,831
Value of loans held for sale	26,768	11,873
Other real estate owned	13,593	12,802
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale, fair value	920,811	865,831
Value of loans held for sale	26,768	11,873
Equity securities	6,422	6,205
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale, fair value	100	100
Value of loans held for sale	0	0
Equity securities	6,422	6,205
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale, fair value	920,711	865,731
Value of loans held for sale	26,768	11,873
Equity securities	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale, fair value	0	0
Value of loans held for sale	0	0
Equity securities	0	0
Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	4,606	8,590
Other real estate owned	13,593	12,802
Fair Value, Measurements, Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0
Other real estate owned	0	0
Fair Value, Measurements, Nonrecurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	1,737	2,290
Other real estate owned	241	297
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	2,869	6,300
Other real estate owned	$ 13,352	$ 12,505

Fair Value - Aggregate Fair Val

Fair Value - Aggregate Fair Value and Contractual Balance of Loans for Sale (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Value of loans held for sale	$ 26,768	$ 11,873
Excess	965	311
Contractual Balance
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Value of loans held for sale	$ 25,803	$ 11,562

Fair Value - Narrative (Details

Fair Value - Narrative (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Average capitalization rate	7.60%
Specific reserve for impaired loans	$ 33,605	$ 33,505	$ 32,423	$ 33,865	$ 28,924	$ 27,122
Additions to level 3 from foreclosed loans	4,600
Paydowns and chargeoffs	1,500
Additions	2,700
Other Real Estate Owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of impaired loans	4,600		8,600
Specific reserve for impaired loans	1,600		$ 2,700
Additions to level 3 from foreclosed loans	5,500
Reductions related to sale of loans	4,300
Writedowns	$ 400

Fair Value - Carrying Amount an

Fair Value - Carrying Amount and Fair Value of Other Significant Financial Instruments Not Measured on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Financial Assets
Debt securities held to maturity	$ 273,644	$ 357,949
Time deposits with other banks	4,579	8,243
Loans, net	4,952,684	4,792,791
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial Assets
Debt securities held to maturity	0	0
Time deposits with other banks	0	0
Loans, net	0	0
Financial Liabilities
Deposit liabilities	0	0
Federal Home Loan Bank (FHLB) borrowings	0	0
Subordinated debt	0	0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Financial Assets
Debt securities held to maturity	276,069	349,895
Time deposits with other banks	0	0
Loans, net	0	0
Financial Liabilities
Deposit liabilities	0	0
Federal Home Loan Bank (FHLB) borrowings	0	0
Subordinated debt	61,160	61,224
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Financial Assets
Debt securities held to maturity	0	0
Time deposits with other banks	4,473	8,132
Loans, net	4,961,833	4,835,248
Financial Liabilities
Deposit liabilities	5,672,972	5,172,098
Federal Home Loan Bank (FHLB) borrowings	49,996	380,027
Subordinated debt	0	0
Carrying Value | Fair Value, Measurements, Recurring
Financial Assets
Debt securities held to maturity	273,644	357,949
Time deposits with other banks	4,579	8,243
Loans, net	4,948,078	4,784,201
Financial Liabilities
Deposit liabilities	5,673,141	5,177,240
Federal Home Loan Bank (FHLB) borrowings	50,000	380,000
Subordinated debt	$ 71,014	$ 70,804

Business Combinations - Narrati

Business Combinations - Narrative (Details) $ in Millions	Oct. 19, 2018USD ($)branch
Business Acquisition [Line Items]
Number of branches operated | branch	7
First Green Bancorp, Inc.
Business Acquisition [Line Items]
Percentage of common stock acquired	100.00%
Common stock portion, number of Seacoast stock for each share of stock converted (in shares)	0.7324
Goodwill recognized from acquisition, nondeductible | $	$ 56.7

Business Combinations - Purchas

Business Combinations - Purchase Price (Details) - First Green Bancorp, Inc. $ / shares in Units, shares in Thousands, $ in Thousands	Oct. 19, 2018USD ($)$ / sharesshares
Business Acquisition [Line Items]
Shares exchanged for cash	$ 5,462
Per share exchange ratio (in shares)	0.7324
Number of shares of common stock issued (in shares) | shares	4,000
Multiplied by common stock price per share (in dollars per share) | $ / shares	$ 26.87
Value of common stock issued	$ 107,486
Cash paid for First Green vested stock options	6,558
Total purchase price	$ 114,044

Business Combinations - Fair Va

Business Combinations - Fair Value of the Assets Purchased, Including Goodwill and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Oct. 19, 2018
Assets:
Goodwill	$ 205,286	$ 204,753
First Green Bancorp, Inc. | Measurement Period Adjustments
Assets:
Cash			$ 0
Investment securities			0
Loans, net			0
Fixed assets			0
Other real estate owned			0
Core deposit intangibles			(678)
Goodwill			532
Other assets			181
Totals			35
Liabilities:
Deposits			0
Other liabilities			35
Totals			35
Initially Measured October 19, 2018 | First Green Bancorp, Inc.
Assets:
Cash			29,434
Investment securities			32,145
Loans, net			631,497
Fixed assets			16,828
Other real estate owned			410
Core deposit intangibles			10,170
Goodwill			56,198
Other assets			40,669
Totals			817,351
Liabilities:
Deposits			624,289
Other liabilities			79,018
Totals			703,307
As Adjusted October 19, 2018 | First Green Bancorp, Inc.
Assets:
Cash			29,434
Investment securities			32,145
Loans, net			631,497
Fixed assets			16,828
Other real estate owned			410
Core deposit intangibles			9,492
Goodwill			56,730
Other assets			40,850
Totals			817,386
Liabilities:
Deposits			624,289
Other liabilities			79,053
Totals			$ 703,342

Business Combinations - Fair _2

Business Combinations - Fair Value of Acquired Loans (Details) - First Green Bancorp, Inc. $ in Thousands	Oct. 19, 2018USD ($)
Business Acquisition [Line Items]
Book Balance	$ 668,216
Fair Value	631,497
Commercial real estate
Business Acquisition [Line Items]
Book Balance	437,767
Fair Value	406,613
Commercial loans
Business Acquisition [Line Items]
Book Balance	56,288
Fair Value	54,973
Single family residential real estate
Business Acquisition [Line Items]
Book Balance	101,674
Fair Value	101,119
Construction/development/land
Business Acquisition [Line Items]
Book Balance	61,195
Fair Value	58,385
Consumer and other loans
Business Acquisition [Line Items]
Book Balance	9,156
Fair Value	8,942
Purchased Credit Impaired
Business Acquisition [Line Items]
Book Balance	2,136
Fair Value	$ 1,465

Business Combinations - Purch_2

Business Combinations - Purchased Credit Impaired Loans (Details) - First Green Bancorp, Inc. $ in Thousands	Oct. 19, 2018USD ($)
Business Acquisition [Line Items]
Total purchased credit-impaired loans acquired	$ 631,497
Purchased Credit Impaired Loans
Business Acquisition [Line Items]
Contractually required principal and interest	2,136
Non-accretable difference	(671)
Cash flows expected to be collected	1,465
Accretable yield	0
Total purchased credit-impaired loans acquired	$ 1,465

Business Combinations - Pro-For

Business Combinations - Pro-Forma Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018
Business Combinations [Abstract]
Net interest income	$ 59,670	$ 174,416
Net income	$ 21,070	$ 64,440
EPS - basic (in dollars per share)	$ 0.41	$ 1.26
EPS - diluted (in dollars per share)	$ 0.40	$ 1.24

Uncategorized Items - sbcf20190

Label	Element	Value
Accounting Standards Update 2016-01 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 0
Accounting Standards Update 2016-01 [Member] | Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	(115,000)
Accounting Standards Update 2016-01 [Member] | AOCI Attributable to Parent [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 115,000