FB Financial (FBK) 10-Q 10 May 18 2018 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2018	May 04, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Trading Symbol	FBK
Entity Registrant Name	FB Financial Corp
Entity Central Index Key	1,649,749
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		30,680,450

Consolidated balance sheets (Un

Consolidated balance sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
ASSETS
Cash and due from banks	$ 53,060	$ 29,831
Federal funds sold	7,171	66,127
Interest bearing deposits in financial institutions	13,469	23,793
Cash and cash equivalents	73,700	119,751
Investments:
Available-for-sale debt securities, at fair value	594,248	536,270
Equity securities, at fair value	3,099	7,722
Federal Home Loan Bank stock, at cost	11,810	11,412
Loans held for sale, at fair value	414,518	526,185
Loans	3,244,663	3,166,911
Less: allowance for loan losses	24,406	24,041
Net loans	3,220,257	3,142,870
Premises and equipment, net	81,175	81,577
Other real estate owned, net	15,334	16,442
Interest receivable	13,920	13,069
Mortgage servicing rights, at fair value	93,160	76,107
Goodwill	137,190	137,190
Core deposit and other intangibles, net	14,027	14,902
Other assets	52,978	44,216
Total assets	4,725,416	4,727,713
Demand deposits
Noninterest-bearing	930,991	888,200
Interest-bearing	1,945,886	1,909,546
Savings deposits	182,265	178,320
Customer time deposits	625,616	602,628
Brokered and internet time deposits	81,393	85,701
Total time deposits	707,009	688,329
Total deposits	3,766,151	3,664,395
Securities sold under agreements to repurchase	14,724	14,293
Short-term borrowings	138,707	190,000
Long-term debt	139,586	143,302
Accrued expenses and other liabilities	55,173	118,994
Total liabilities	4,114,341	4,130,984
Shareholders' equity:
Common stock, $1 par value per share; 75,000,000 shares authorized; 30,671,763 and 30,535,517 shares issued and outstanding at March 31, 2018 and December 31, 2017, respectively	30,672	30,536
Additional paid-in capital	418,810	418,596
Retained earnings	167,094	147,449
Accumulated other comprehensive (loss) income, net	(5,501)	148
Total shareholders' equity	611,075	596,729
Total liabilities and shareholders' equity	$ 4,725,416	$ 4,727,713

Consolidated balance sheets (U3

Consolidated balance sheets (Unaudited) (Parenthetical) - $ / shares	Mar. 31, 2018	Dec. 31, 2017
Statement Of Financial Position [Abstract]
Common stock, par value	$ 1	$ 1
Common stock, shares authorized	75,000,000	75,000,000
Common stock, shares issued	30,671,763	30,535,517
Common stock, shares outstanding	30,671,763	30,535,517

Consolidated statements of inco

Consolidated statements of income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Interest income:
Interest and fees on loans	$ 50,693	$ 29,006
Interest on securities
Taxable	2,852	2,567
Tax-exempt	925	1,040
Other	378	276
Total interest income	54,848	32,889
Deposits
Demand and savings accounts	3,315	1,531
Time deposits	1,756	583
Short-term borrowings	25	10
Long-term debt	1,323	514
Total interest expense	6,419	2,638
Net interest income	48,429	30,251
Provision for loan losses	317	(257)
Net interest income after provision for loan losses	48,112	30,508
Noninterest income:
Mortgage banking income	26,471	25,080
Service charges on deposit accounts	2,097	1,766
ATM and interchange fees	2,361	2,047
Investment services and trust income	1,206	814
(Loss) gain from securities, net	(47)	1
(Loss) gain or write-downs of other real estate owned	(186)	748
Gain from other assets	68
Other income	1,305	631
Total noninterest income	33,275	31,087
Noninterest expenses:
Salaries, commissions and employee benefits	34,149	29,006
Occupancy and equipment expense	3,605	3,109
Legal and professional fees	2,043	1,428
Data processing	2,035	1,501
Merger and conversion	1,193	487
Amortization of core deposits and other intangibles	853	392
Regulatory fees and deposit insurance assessments	562	435
Software license and maintenance fees	467	457
Advertising	3,282	2,932
Other expense	7,962	6,670
Total noninterest expense	56,151	46,417
Income before income taxes	25,236	15,178
Income tax expense (Note 7)	5,482	5,425
Net income	$ 19,754	$ 9,753
Weighted average shares of common stock outstanding
Basic	30,613,284	24,138,437
Fully diluted	31,421,830	24,610,991
Earnings per share
Basic	$ 0.65	$ 0.40
Fully diluted	$ 0.63	$ 0.40

Consolidated statements of comp

Consolidated statements of comprehensive income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 19,754	$ 9,753
Other comprehensive (loss) income, net of tax:
Net change in unrealized (loss) gain in available-for-sale securities, net of taxes of $2,539 and $354	(7,070)	550
Reclassification adjustment for loss (gain) on securities included in net income, net of taxes of $2 and $0	7	(1)
Net change in unrealized gain in hedging activities, net of taxes of $449 and $0	1,273
Reclassification adjustment for loss on hedging activities, net of taxes of $8 and $0	32
Total other comprensive (loss) income, net of tax	(5,758)	549
Comprehensive income	$ 13,996	$ 10,302

Consolidated statements of com6

Consolidated statements of comprehensive income (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net change in unrealized (loss) gain in available-for-sale, tax	$ 2,539	$ 354
Reclassification adjustment for loss (gain) on securities, tax	2	0
Net change in unrealized gain in hedging activities, tax	449	0
Reclassification adjustment for losses on hedging activities, tax	$ 8	$ 0

Consolidated statements of chan

Consolidated statements of changes in shareholders' equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss), Net
Balance at Dec. 31, 2016	$ 330,498	$ 24,108	$ 213,480	$ 93,784	$ (874)
Initial fair value election on mortgage servicing rights, net of taxes of $396 (See Note 1)	615			615
Net income	9,753			9,753
Other comprehensive income (loss), net of taxes	549				549
Stock-based compensation expense	1,352		1,352
Restricted stock units vested and distributed, net of shares withheld for taxes	(625)	47	(672)
Balance at Mar. 31, 2017	342,142	24,155	214,160	104,152	(325)
Balance at Dec. 31, 2017	596,729	30,536	418,596	147,449	148
Initial adoption of ASU 2016-01 (See Note 1)				(109)	109
Net income	19,754			19,754
Other comprehensive income (loss), net of taxes	(5,758)				(5,758)
Stock-based compensation expense	1,958	4	1,954
Restricted stock units vested and distributed, net of shares withheld for taxes	(2,277)	115	(2,392)
Shares issued under employee stock purchase program	669	17	652
Balance at Mar. 31, 2018	$ 611,075	$ 30,672	$ 418,810	$ 167,094	$ (5,501)

Consolidated statements of cha8

Consolidated statements of changes in shareholders' equity (Unaudited) (Parenthetical) $ in Thousands	3 Months Ended
	Mar. 31, 2017USD ($)
Statement Of Stockholders Equity [Abstract]
Fair Value Election on Mortgage Servicing Rights Retained Earnings Adjustment, Tax	$ 396

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net income	$ 19,754	$ 9,753
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation expense	1,106	1,002
Amortization of core deposits and other intangibles	853	392
Capitalization of mortgage servicing rights	(13,510)	(15,013)
Net change in fair value of mortgage servicing rights	(3,543)	501
Stock-based compensation expense	1,958	1,352
Provision for loan losses	317	(257)
Provision for mortgage loan repurchases	186	183
Accretion of yield on purchased loans	(1,687)	(1,160)
Accretion of discounts and amortization of premiums on securities, net	697	708
Loss (gain) from securities, net	47	(1)
Originations of loans held for sale	(1,617,103)	(1,346,535)
Proceeds from sale of loans held for sale	1,707,527	1,507,296
Gain on sale and change in fair value of loans held for sale	(23,391)	(22,833)
Net loss (gain) or write-downs of other real estate owned	186	(748)
Loss on other assets	(68)
Provision for deferred income taxes	5,482	5,425
Changes in:
Other assets and interest receivable	(4,759)	11,954
Accrued expenses and other liabilities	(26,207)	(4,107)
Net cash provided by operating activities	47,845	147,912
Activity in available-for-sale securities:
Sales	221
Maturities, prepayments and calls	16,503	19,480
Purchases	(81,990)	(4,987)
Net increase in loans	(74,928)	(46,190)
Purchases of premises and equipment	(704)	(459)
Proceeds from the sale of other real estate owned	1,432	2,228
Net cash used in investing activities	(139,466)	(29,928)
Cash flows from financing activities:
Net increase in demand and savings deposits	83,076	31,135
Net increase (decrease) in time deposits	18,680	(1,498)
Net increase (decrease) in securities sold under agreements to repurchase	431	(3,431)
Decrease in short-term borrowings	(51,293)	(150,000)
Decrease in long-term debt	(3,716)	(340)
Share based compensation withholding obligation	(2,277)	(625)
Net proceeds from sale of common stock	669
Net cash provided by (used in) financing activities	45,570	(124,759)
Net change in cash and cash equivalents	(46,051)	(6,775)
Cash and cash equivalents at beginning of the period	119,751	136,327
Cash and cash equivalents at end of the period	73,700	129,552
Supplemental cash flow information:
Interest paid	6,066	2,330
Taxes paid	31	31
Supplemental noncash disclosures:
Transfers from loans to other real estate owned	630	888
Transfers from other real estate owned to loans	120
Transfers from loans held for sale to loans	1,599	4,341
Derecognition of rebooked GNMA delinquent loans (See Note 1)	43,035
Trade date payable - securities	3,912
Adoption of ASU 2016-01 (See Note 1)	$ (109)
Fair value election of mortgage servicing rights		$ 1,011

Basis of Presentation

Basis of Presentation	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Basis of presentation	Note (1)—Basis of presentation: FB Financial Corporation (the “Company”) is a bank holding company, headquartered in Nashville, Tennessee. The Company operates through its wholly owned bank subsidiary, FirstBank (the “Bank”), with 56 full-service bank branches across Tennessee, north Alabama and north Georgia, and a national mortgage business with office locations across the Southeast. The consolidated financial statements, including the notes thereto of the Company, have been prepared in accordance with United States generally accepted accounting principles (“GAAP”) interim reporting requirements, and therefore do not include all information and notes included in the annual consolidated financial statements in conformity with GAAP. These interim consolidated financial statements and notes thereto should be read in conjunction with the Company’s audited consolidated financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K. The unaudited consolidated financial statements include all adjustments, consisting of normal recurring adjustments, necessary for a fair presentation of the results for the interim periods. The results for interim periods are not necessarily indicative of results for a full year. The accompanying consolidated financial statements have been prepared in conformity with GAAP and general banking industry. In preparing the financial statements, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the balance sheet and the reported results of operations for the periods then ended. Actual results could differ significantly from those estimates. Certain prior period amounts have been reclassified to conform to the current period presentation without any impact on the reported amounts of net income or shareholders’ equity. Effective July 31, 2017, the Bank completed its previously announced acquisitions of Clayton Bank and Trust and American City Bank headquartered in Knoxville, Tennessee and Tullahoma, Tennessee, respectively. See Note 2, “Mergers and acquisitions” in these Notes to the consolidated unaudited financial statements for further details regarding acquisitions. The Company has evaluated, for consideration of recognition or disclosure, subsequent events that occurred through the date of issuance of these financial statements. The Company has determined that there were no other subsequent events other than described below that occurred after March 31, 2018, but prior to the issuance of these financial statements that would have a material impact on the Company’s consolidated financial statements. On April 23, 2018, the Company declared the initiation of a regular quarterly dividend of $0.06 per share to be paid on May 15, 2018 to shareholders of record as of April 30, 2018, totaling approximately $1,841. As of March 31, 2018, the Company is considered a “controlled company” and is controlled by the Company’s Executive Chairman and former sole shareholder, James W. Ayers. Additionally, the Company qualifies as an “emerging growth company” as defined by the Jumpstart Our Business Startups Act (“JOBS Act”). Basic earnings per common share are net income divided by the weighted average number of common shares outstanding during the period. Diluted earnings per common share include the dilutive effect of additional potential common shares issuable under the restricted stock units granted but not yet vested and distributable. Unearned compensation is used to repurchase common stock at the average market price. The following is a summary of the basic and diluted earnings per common share calculation for each of the periods presented: Three Months Ended March 31, 2018 2017 Basic earnings per share calculation: Net income $ 19,754 $ 9,753 Weighted-average basic shares outstanding 30,613,284 24,138,437 Basic earnings per share $ 0.65 $ 0.40 Diluted earnings per share: Net income $ 19,754 $ 9,753 Weighted-average basic shares outstanding 30,613,284 24,138,437 Average diluted common shares outstanding 808,546 472,554 Weighted-average diluted shares outstanding 31,421,830 24,610,991 Diluted earnings per share $ 0.63 $ 0.40 Rebooked GNMA loans included in loans held for sale Government National Mortgage Association (“GNMA”) optional repurchase programs allow financial institutions to buy back individual delinquent mortgage loans that meet certain criteria from the securitized loan pool for which the institution provides servicing and was the original transferor. At the servicer’s option and without GNMA’s prior authorization, the servicer may repurchase such a delinquent loan for an amount equal to 100 percent of the remaining principal balance of the loan. Under FASB ASC Topic 860, “Transfers and Servicing,” this buy-back option is considered a conditional option until the delinquency criteria are met, at which time the option becomes unconditional. When the Company is deemed to have regained effective control over these loans under the unconditional buy-back option, the loans can no longer be reported as sold and must be brought back onto the balance sheet as loans held for sale, regardless of whether the Company intends to exercise the buy-back option if the buyback option provides the transferor a more-than-trivial benefit. At March 31, 2018, there were $45,933 of delinquent GNMA loans that had previously been sold; however, the Company determined there was not a “more-than-trivial benefit” based on an analysis of interest rates and an assessment of potential reputational risk associated with these loans. As such, the Company did not rebook the GNMA loans as of March 31, 2018. At December 31, 2017, rebooked GNMA loans held for sale amounted to $43,035 with an offsetting liability included in accrued expenses and other liabilities in the same amount. The fair value option election does not apply to the GNMA optional repurchase loans which do not meet the requirements under FASB ASC Topic 825 to be accounted for under the fair value option. Except as set forth below, the Company did not adopt any new accounting policies that were not disclosed in the Company’s 2017 audited consolidated financial statements included on Form 10-K. Recently adopted accounting principles: On January 1, 2018, the Company adopted the following newly issued accounting standards: In May 2014, the FASB issued an update to Accounting Standards Update (“ASU”) No. 2014-09, “Revenue from Contracts with Customers”. The Company adopted this guidance on January 1, 2018 and all subsequent amendments to the ASU (collectively, “ASC 606”) which (i) creates a single framework for recognizing revenue from contracts with customers that fall within its scope and (ii) revises when it is appropriate to recognize a gain (loss) from the transfer of nonfinancial assets, such as OREO. The majority of the Company’s revenues come from interest income and other sources, including loans, leases, securities and derivatives that are outside the scope of ASC 606. The Company’s services that fall within the scope of ASC 606 are presented within Noninterest income and are recognized as revenue as the Company satisfies its obligation to the customer. Services within the scope of ASC 606 include deposit service charges on deposits, interchange income, investment services and trust income, and the sale of OREO, all within the Banking Segment. The Company has evaluated the effect of this updated on these fee-based income streams and concluded that adoption did not result in a change to the accounting for any of the in-scope revenue streams; as such, no cumulative effect adjustment was recorded. The following is a summary of the implementation considerations for the revenue streams that fall within the scope of Topic 606: • Service charges on deposits, investment services and trust income, and interchange fees — Fees from these services are either transaction based, for which the performance obligations are satisfied when the individual transaction is processed, or set periodic service charges, for which the performance obligations are satisfied over the period the service is provided. Transaction based fees are recognized at the time the transaction is processed, and periodic service charges are recognized over the service period. The adoption of Topic 606 had no impact on the Company's revenue recognition practice for these services. • Gains on sales of other real estate — ASU 2014-09 creates Topic 610-20, under which a gain on sale should be recognized when a contract for sale exists and control of the asset has been transferred to the buyer. Topic 606 list several criteria which must exist to conclude that a contract for sale exists, including a determination that the institution will collect substantially all of the consideration to which it is entitled. This presents a key difference between the current and new guidance related to the recognition of the gain when the institution finances the sale of the property. Rather than basing recognition on the amount of the buyer's initial investment, which was the primary consideration under prior guidance, the analysis is now based on various factors including not only the loan to value, but also the credit quality of the borrower, the structure of the loan, and any other factors that may affect collectability. While these differences may affect the decision to recognize or defer gains on sales of other real estate in circumstances where the Company has financed the sale, the effects are not expected to be material to its financial statements. In January 2016, the FASB released ASU 2016-01, “Recognition and Measurement of Financial Assets and Liabilities.” The main provisions of the update are to eliminate the available for sale classification of accounting for equity securities and adjust the fair value disclosures for financial instruments carried at amortized cost such that the disclosed fair values represent an exit price as opposed to an entry price. The provisions of this update will require that equity securities be carried at fair market value on the balance sheet and any periodic changes in value will be adjustments to the income statement. A practical expedient is provided for equity securities without a readily determinable fair value such that these securities can be carried at cost less any impairment. Results for reporting periods beginning after January 1, 2018 are presented under this method while prior period disclosures are presented under legacy GAAP. The Company recorded a net loss in beginning retained earnings of $109 in connection with this transition. In August 2016, the FASB issued ASU 2016-15, “Statement of Cash Flows - Classification of Certain Cash Receipts and Cash Payments (Topic 230).” ASU 2016-15 provides guidance related to certain cash flow issues in order to reduce the current and potential future diversity in practice. This adoption did not have an impact on our financial statements. In May 2017, the FASB issued ASU 2017-09, “Stock Compensation - Scope of Modification Accounting (Topic 718): Scope of Modification Accounting.” The amendments in this ASU provide guidance on when changes to the terms or conditions of a share-based payment award are to be accounted for as modifications. Under ASU 2017-09, entities are not required to apply modification accounting to a share-based payment award when the award’s fair value, vesting conditions, and classification as an entity or a liability instrument remain the same after the change. ASU 2017-09 is effective for all entities beginning after December 15, 2017 including interim periods within the fiscal year. The adoption of this update on January 1, 2018 did not have a significant impact on the Company’s consolidated financial statements. In August 2017, the FASB issued ASU 2017-12, “Derivatives and Hedging: Targeted Improvements to Accounting for Hedging Activities.” The amendments in this ASU make more financial and non-financial hedging strategies eligible for hedge accounting. It also amends the presentation and disclosure requirements and changes how companies assess effectiveness. There was no impact to the Company’s financial statements or disclosures as a result of this early adoption as of January 1, 2018. Newly issued not yet effective accounting standards: In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842).” The update will require lessees to recognize right-of-use assets and lease liabilities for all leases not considered short term leases. The provisions of the update also include (a) defining direct costs to only include those incremental costs that would not have been incurred if the lease had not been entered into, (b) circumstances under which the transfer contract in a sale-leaseback transaction should be accounted for as the sale of an asset by the seller-lessee and the purchase of an asset by the buyer-lessor, and (c) additional disclosure requirements. The provisions of this update become effective for interim and annual periods beginning after December 15, 2018. Management is currently evaluating the potential impact of this update. In June 2016, the FASB issued ASU 2016-13, “Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.” ASU 2016-13 requires the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts and requires enhanced disclosures related to the significant estimates and judgments used in estimating credit losses, as well as, the credit quality and underwriting standards of an organization’s portfolio. In addition, ASU 2016-13 amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. ASU 2016-13 will become effective for interim and annual periods beginning after December 15, 2019. Management is currently evaluating the potential impact of this update. In March 2017, the FASB issued ASU 2017-08, “Receivables – Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities.” The amendments in this ASU shorten the amortization period for certain callable debt securities held at a premium. Specifically, the amendments require the premium to be amortized to the earliest call date. The amendments do not require an accounting change for securities held at a discount, which continue to be amortized to maturity. Public business entities must prospectively apply the amendments in this ASU to annual periods beginning after December 15, 2018, including interim periods. The adoption of this update will not have an impact on its consolidate financial statements.

Mergers and acquisitions

Mergers and acquisitions	3 Months Ended
	Mar. 31, 2018
Business Combinations [Abstract]
Mergers and acquisitions	Note (2)—Mergers and acquisitions: Clayton Bank and Trust and American City Bank On July 31, 2017, the Bank completed its merger with Clayton Bank and Trust (“CBT”) and American City Bank (“ACB” and together with CBT, the “Clayton Banks”), pursuant to the Stock Purchase Agreement with Clayton HC, Inc., a Tennessee corporation (“Seller”), and James L. Clayton, the majority shareholder of Seller, dated February 8, 2017, as amended on May 26, 2017, with a purchase price of approximately $236,484. The Company issued 1,521,200 shares of common stock and paid cash of $184,200 to purchase all of the outstanding shares of the Clayton Banks. At closing, the Clayton Banks merged with and into FirstBank, with FirstBank continuing as the surviving banking entity. Prior to the merger, the Clayton Banks operated 18 banking locations across Tennessee. The merger with the Clayton Banks has allowed the Company to further its strategic initiatives by expanding its geographic footprint in Knoxville and other Tennessee markets and accelerates the growth of the Company’s Banking segment. Goodwill of $90,323 recorded in connection with the transaction resulted primarily from anticipated synergies arising from the combination of certain operational areas of the Clayton Banks and the Company as well as the purchase premium inherent to buying a complete and successful banking operation. Goodwill is included in the Banking segment as substantially all of the operations resulting from the Clayton Banks merger is included in the Banking segment. In connection with the transaction, the Company incurred $1,193 and $487 in merger and conversion expenses during the three months ended March 31, 2018 and 2017, respectively. For income tax purposes, the merger with the Clayton Banks was treated as an asset purchase. As an asset purchase for income tax purposes, the carrying value of assets and liabilities for the Clayton Banks are the same for both financial reporting and income tax purposes; therefore, no deferred taxes were recorded at the date of acquisition. Additionally, this treatment allows for the deductibility of the goodwill and core deposit intangible for income tax purposes over 15 years. The Company accounted for the Clayton Banks transaction under the acquisition method under ASC Topic 805. Accordingly, the fair value of the assets acquired and liabilities assumed along with the resulting goodwill was recorded as of the date of the merger. The Company’s operating results for the three months ended March 31, 2018 include the operating results of the acquired assets and assumed liabilities of the Clayton Banks. As of December 31, 2017, the Company finalized its valuation of all assets acquired and liabilities assumed, resulting in no material changes to preliminary purchase accounting adjustments. The following tables present the final estimated fair value of net assets acquired as of the July 31, 2017 acquisition date and the consideration paid and an allocation of the purchase price to net assets acquired: As of July 31, 2017 As Recorded by FB Financial Corporation (1) Assets Cash and cash equivalents $ 49,059 Investment securities 59,493 FHLB stock 3,409 Loans 1,059,728 Allowance for loan losses — Premises and equipment 18,866 Other real estate owned 6,888 Intangibles, net 12,334 Other assets 5,978 Total assets $ 1,215,755 Liabilities Interest-bearing deposits $ 670,054 Non-interest bearing deposits 309,464 Borrowings 84,831 Accrued expenses and other liabilities 5,245 Total liabilities $ 1,069,594 Net assets acquired $ 146,161 Purchase price: Equity consideration Common stock issued 1,521,200 Price per share as of July 31, 2017 $ 34.37 Total equity consideration $ 52,284 Cash consideration 184,200 (2) Total consideration paid $ 236,484 Preliminary allocation of consideration paid: Fair value of net assets acquired including identifiable intangible assets $ 146,161 Goodwill 90,323 Total consideration paid $ 236,484 (1) Amounts include certain reclassifications of opening balances to conform to the Company’s presentation. (2) Amount was deposited into an interest-bearing account with the Bank in the name of the Seller as of July 31, 2017. The following unaudited pro forma condensed consolidated financial information presents the results of operations for the three months ended March 31, 2017 as though the merger had been completed as of January 1, 2016. The unaudited estimated pro forma information combines the historical results of the Clayton Banks with the Company’s historical consolidated results and includes certain adjustments reflecting the estimated impact of certain fair value adjustments including loan discount accretion, amortization of core deposit and other intangibles and amortization of the discount on time deposits for the period presented. The pro forma information is not indicative of what would have occurred had the acquisition taken place on January 1, 2016 and does not include the effect of all cost-saving or revenue-enhancing strategies. Three months ended March 31, 2017 Net interest income $ 46,687 Total revenues $ 79,281 Net income $ 16,728

Investment securities

Investment securities	3 Months Ended
	Mar. 31, 2018
Investments Debt And Equity Securities [Abstract]
Investment securities	Note (3)—Investment securities: The amortized cost of securities and their fair values at March 31, 2018 and December 31, 2017 are shown below: March 31, 2018 Amortized cost Gross unrealized gains Gross unrealized losses Fair Value Investment Securities Available-for-sale debt securities U.S. government agency securities $ 999 $ — $ (17 ) $ 982 Mortgage-backed securities - residential 486,907 237 (14,214 ) 472,930 Municipals, tax exempt 113,492 1,582 (1,916 ) 113,158 Treasury securities 7,356 — (178 ) 7,178 Total $ 608,754 $ 1,819 $ (16,325 ) $ 594,248 As of March 31, 2018, the Company also had $3,099 in marketable equity securities recorded at fair value. A loss of $38 was recognized due to changes in fair value of these securities during the three months ended March 31, 2018. As of January 1, 2018, the Company adopted ASU 2016-01 (See Note 1) and reclassified $3,604 of other securities without readily determinable market values to other assets. December 31, 2017 Amortized cost Gross unrealized gains Gross unrealized losses Fair Value Investment Securities Available-for-sale debt securities U.S. government agency securities $ 999 $ — $ (13 ) $ 986 Mortgage-backed securities - residential 425,557 374 (7,150 ) 418,781 Municipals, tax exempt 107,127 2,692 (568 ) 109,251 Treasury securities 7,345 — (93 ) 7,252 Total debt securities 541,028 3,066 (7,824 ) 536,270 Equity and other securities 7,870 1 (149 ) 7,722 Total investment securities $ 548,898 $ 3,067 $ (7,973 ) $ 543,992 Securities pledged at March 31, 2018 and December 31, 2017 had a carrying amount of $427,995 and $337,604, respectively, and were pledged to secure Federal Home Loan Bank advances, a Federal Reserve Bank line of credit, public deposits and repurchase agreements. The amortized cost and fair value of debt securities by contractual maturity at March 31, 2018 and December 31, 2017 are shown below. Maturities may differ from contractual maturities in mortgage-backed securities because the mortgage underlying the security may be called or repaid without any penalties. Therefore, mortgage-backed securities are not included in the maturity categories in the following maturity summary. March 31, 2018 December 31, 2017 Available-for-sale Available-for-sale Amortized cost Fair value Amortized cost Fair value Due in one year or less $ 5,715 $ 5,841 $ 905 $ 925 Due in one to five years 24,165 24,396 28,332 28,878 Due in five to ten years 19,817 19,960 19,218 19,588 Due in over ten years 72,150 71,121 67,016 68,098 121,847 121,318 115,471 117,489 Mortgage-backed securities - residential 486,907 472,930 425,557 418,781 Total debt securities $ 608,754 $ 594,248 $ 541,028 $ 536,270 Sales and impairment of available-for-sale securities were as follows: Three Months Ended March 31, 2018 2017 Proceeds from sales $ 221 $ — Gross realized gains — — Gross realized losses 9 — The Company also recognized $1 in gains related to the early call of available for sale securities during the three months ended March 31, 2017. The following tables show gross unrealized losses at March 31, 2018 and December 31, 2017, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position: March 31, 2018 Less than 12 months 12 months or more Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized loss U.S. government agency securities $ — $ — $ 982 $ 17 $ 982 $ 17 Mortgage-backed securities - residential 163,771 3,236 274,285 10,978 438,056 14,214 Municipals, tax exempt 30,104 762 19,186 1,154 49,290 1,916 Treasury securities 7,177 178 — — 7,177 $ 178 Total debt securities $ 201,052 $ 4,176 $ 294,453 $ 12,149 $ 495,505 $ 16,325 December 31, 2017 Less than 12 months 12 months or more Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized loss U.S. government agency securities $ — $ — $ 986 $ 13 $ 986 $ 13 Mortgage-backed securities - residential 107,611 980 290,258 6,170 397,869 7,150 Municipals, tax exempt 7,354 101 20,112 467 27,466 568 Treasury securities 7,252 93 — — 7,252 93 Total debt securities 122,217 1,174 311,356 6,650 433,573 7,824 Equity securities — — 3,050 149 3,050 149 $ 122,217 $ 1,174 $ 314,406 $ 6,799 $ 436,623 $ 7,973 As of March 31, 2018 and December 31, 2017, the Company’s securities portfolio consisted of 307 and 294 securities, 171 and 124 of which were in an unrealized loss position, respectively. The Company evaluates securities with unrealized losses for other-than-temporary impairment (OTTI) on a quarterly basis and recorded no OTTI for the three months ended March 31, 2018 and 2017. Impairment is assessed at the individual security level. The Company considers an investment security impaired if the fair value of the security is less than its cost or amortized cost basis. For debt securities, the unrealized losses associated with these investment securities are primarily driven by interest rates and are not due to the credit quality of the securities. The Company currently does not intend to sell those investments with unrealized losses, and it is unlikely that the Company will be required to sell the investments before recovery of their amortized cost bases, which may be maturity. As of March 31, 2018, the Company had a trade date payable related to securities purchases amounting to $3,912 that had not yet settled.

Loans and Allowance for Loan Lo

Loans and Allowance for Loan Losses	3 Months Ended
	Mar. 31, 2018
Receivables [Abstract]
Loans and allowance for loan losses	Note (4)—Loans and allowance for loan losses: Loans outstanding at March 31, 2018 and December 31, 2017, by major lending classification are as follows: March 31, December 31, 2018 2017 Commercial and industrial $ 765,115 $ 715,075 Construction 466,495 448,326 Residential real estate: 1-to-4 family mortgage 491,725 480,989 Residential line of credit 197,740 194,986 Multi-family mortgage 63,295 62,374 Commercial real estate: Owner occupied 499,331 495,872 Non-owner occupied 562,128 551,588 Consumer and other 198,834 217,701 Gross loans 3,244,663 3,166,911 Less: Allowance for loan losses (24,406 ) (24,041 ) Net loans $ 3,220,257 $ 3,142,870 As of March 31, 2018 and December 31, 2017, $1,245,847 and $968,567, respectively, of 1-to-4 family mortgage loans, loans held for sale and multi-family mortgage loans were pledged to the Federal Home Loan Bank of Cincinnati securing advances against the Bank’s line. As of March 31, 2018 and December 31, 2017, $1,215,509 and $724,312, respectively, of commercial and industrial , construction, residential real estate, commercial real estate, and consumer and other loans were pledged to the Federal Reserve Bank under the Borrower-in-Custody program. As of March 31, 2018 and December 31, 2017, the carrying value of purchased credit impaired loans (“PCI”) loans accounted for under ASC 310-30 Loans and Debt Securities Acquired with Deteriorated Credit Quality, Purchased Credit Impaired Accretable yield Balance at December 31, 2017 $ (17,682 ) Principal reductions/ pay-offs (1,294 ) Recoveries — Accretion 2,201 Other changes (180 ) Balance at March 31, 2018 $ (16,955 ) Balance at December 31, 2016 $ (2,444 ) Principal reductions/ pay-offs (698 ) Recoveries (23 ) Accretion 1,023 Balance at March 31, 2017 $ (2,142 ) Interest revenue, through accretion of the difference between the carrying value of the loans and the expected cash flows, is being recognized on all PCI loans. Accretion of interest income amounting to $2,201 and $1,023 was recognized on purchased credit impaired loans during the three months ended March 31, 2018 and 2017, respectively. This includes both the contractual interest income and the purchase accounting contribution through accretion of the liquidity discount and credit mark for changes in estimated cash flows. The total purchase accounting contribution through accretion for all purchased loans was $1,687 and $1,160 for three months ended March 31, 2018 and 2017, respectively. The following provides the allowance for loan losses by portfolio segment and the related investment in loans net of unearned interest for the three months ended March 31, 2018 and 2017 (in thousands): Commercial and industrial Construction 1-to-4 family residential mortgage Residential line of credit Multi- family residential mortgage Commercial real estate owner occupied Commercial real estate non-owner occupied Consumer and other Total Three Months Ended March 31, 2018 Beginning balance - December 31, 2017 $ 4,461 $ 7,135 $ 3,197 $ 944 $ 434 $ 3,558 $ 2,817 $ 1,495 $ 24,041 Provision for loan losses 202 479 (30 ) 214 15 (567 ) (115 ) 119 317 Recoveries of loans previously charged-off 135 252 15 27 — 23 51 206 709 Loans charged off (220 ) — (60 ) (20 ) — — — (361 ) (661 ) Ending balance - March 31, 2018 $ 4,578 $ 7,866 $ 3,122 $ 1,165 $ 449 $ 3,014 $ 2,753 $ 1,459 $ 24,406 Commercial and industrial Construction 1-to-4 family residential mortgage Residential line of credit Multi- family residential mortgage Commercial real estate owner occupied Commercial real estate non-owner occupied Consumer and other Total Three Months Ended March 31, 2017 Beginning balance - December 31, 2016 $ 5,309 $ 4,940 $ 3,197 $ 1,613 $ 504 $ 3,302 $ 2,019 $ 863 $ 21,747 Provision for loan losses 179 635 (239 ) (155 ) 4 81 (998 ) 236 (257 ) Recoveries of loans previously charged-off 83 29 26 56 — 4 1,639 13 1,850 Loans charged off (169 ) (6 ) (88 ) — — — — (179 ) (442 ) Ending balance - March 31, 2017 $ 5,402 $ 5,598 $ 2,896 $ 1,514 $ 508 $ 3,387 $ 2,660 $ 933 $ 22,898 The following table provides the allocation of the allowance for loan losses by loan category broken out between loans individually evaluated for impairment and loans collectively evaluated for impairment as of March 31, 2018 and December 31, 2017: March 31, 2018 Commercial and industrial Construction 1-to-4 family residential mortgage Residential line of credit Multi- family residential mortgage Commercial real estate owner occupied Commercial real estate non-owner occupied Consumer and other Total Amount of allowance allocated to: Individually evaluated for impairment $ 19 $ — $ 16 $ — $ — $ 95 $ 29 $ — $ 159 Collectively evaluated for impairment 4,559 7,866 3,106 1,165 449 2,919 2,724 1,459 24,247 Acquired with deteriorated credit quality — — — — — — — — — Ending balance - March 31, 2018 $ 4,578 $ 7,866 $ 3,122 $ 1,165 $ 449 $ 3,014 $ 2,753 $ 1,459 $ 24,406 December 31, 2017 Commercial and industrial Construction 1-to-4 family residential mortgage Residential line of credit Multi- family residential mortgage Commercial real estate owner occupied Commercial real estate non-owner occupied Consumer and other Total Amount of allowance allocated to: Individually evaluated for impairment $ 20 $ — $ 18 $ — $ — $ 120 $ 33 $ — $ 191 Collectively evaluated for impairment 4,441 7,135 3,179 944 434 3,438 2,784 1,495 23,850 Acquired with deteriorated credit quality — — — — — — — — — Ending balance - December 31, 2017 $ 4,461 $ 7,135 $ 3,197 $ 944 $ 434 $ 3,558 $ 2,817 $ 1,495 $ 24,041 The following table provides the amount of loans by loan category broken between loans individually evaluated for impairment and loans collectively evaluated for impairment as of March 31, 2018 and December 31, 2017: March 31, 2018 Commercial and industrial Construction 1-to-4 family residential mortgage Residential line of credit Multi- family residential mortgage Commercial real estate owner occupied Commercial real estate non-owner occupied Consumer and other Total Loans, net of unearned income Individually evaluated for impairment $ 1,385 $ 1,285 $ 1,492 $ — $ 964 $ 2,150 $ 1,713 $ 29 $ 9,018 Collectively evaluated for impairment 761,779 457,785 467,329 197,740 62,313 485,411 542,351 175,185 3,149,893 Acquired with deteriorated credit quality 1,951 7,425 22,904 — 18 11,770 18,064 23,620 85,752 Ending balance - March 31, 2018 $ 765,115 $ 466,495 $ 491,725 $ 197,740 $ 63,295 $ 499,331 $ 562,128 $ 198,834 $ 3,244,663 December 31, 2017 Commercial and industrial Construction 1-to-4 family residential mortgage Residential line of credit Multi- family residential mortgage Commercial real estate owner occupied Commercial real estate non-owner occupied Consumer and other Total Loans, net of unearned income Individually evaluated for impairment $ 1,579 $ 1,289 $ 1,262 $ — $ 978 $ 2,520 $ 1,720 $ 25 $ 9,373 Collectively evaluated for impairment 711,352 439,309 456,229 194,986 61,376 481,390 531,704 192,357 3,068,703 Acquired with deteriorated credit quality 2,144 7,728 23,498 — 20 11,962 18,164 25,319 88,835 Ending balance - December 31, 2017 $ 715,075 $ 448,326 $ 480,989 $ 194,986 $ 62,374 $ 495,872 $ 551,588 $ 217,701 $ 3,166,911 The Company categorizes loans into risk categories based on relevant information about the ability of borrowers to service their debt such as: current financial information, historical payment experience, credit documentation, public information, and current economic trends, among other factors. The Company analyzes loans individually by classifying the loans as to credit risk. The Company’s risk rating definitions include: Watch. Loans rated as watch includes loans in which management believes conditions have occurred, or may occur, which could result in the loan being downgraded to a worse rated category. Also included in watch are loans rated as special mention, which have a potential weakness that deserves management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or of the institution’s credit position at some future date. Substandard. Loans rated as substandard are inadequately protected by the current net worth and paying capacity of the obligor or of the collateral pledged, if any. Loans so rated have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the institution will sustain some loss if the deficiencies are not corrected. Also included in this category are loans considered doubtful, which have all the weaknesses previously described and management believes those weaknesses may make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. Loans not meeting the criteria above are considered to be pass rated loans. The following table shows credit quality indicators by portfolio class at March 31, 2018 and December 31, 2017: March 31, 2018 Pass Watch Substandard Total Loans, excluding purchased credit impaired loans Commercial and industrial $ 704,689 $ 54,124 $ 4,351 $ 763,164 Construction 441,718 15,468 1,884 459,070 Residential real estate: 1-to-4 family mortgage 452,858 9,027 6,936 468,821 Residential line of credit 194,887 1,677 1,176 197,740 Multi-family mortgage 62,175 138 964 63,277 Commercial real estate: Owner occupied 457,347 25,962 4,252 487,561 Non-owner occupied 527,134 14,972 1,958 544,064 Consumer and other 172,260 2,379 575 175,214 Total loans, excluding purchased credit impaired loans $ 3,013,068 $ 123,747 $ 22,096 $ 3,158,911 Purchased credit impaired loans Commercial and industrial $ — $ 1,351 $ 600 $ 1,951 Construction — 3,422 4,003 7,425 Residential real estate: 1-to-4 family mortgage — 19,454 3,450 22,904 Residential line of credit — — — — Multi-family mortgage — — 18 18 Commercial real estate: Owner occupied — 4,565 7,205 11,770 Non-owner occupied — 7,517 10,547 18,064 Consumer and other — 18,704 4,916 23,620 Total purchased credit impaired loans $ — $ 55,013 $ 30,739 $ 85,752 Total loans $ 3,013,068 $ 178,760 $ 52,835 $ 3,244,663 December 31, 2017 Pass Watch Substandard Total Loans, excluding purchased credit impaired loans Commercial and industrial $ 657,595 $ 50,946 $ 4,390 $ 712,931 Construction 431,242 7,388 1,968 440,598 Residential real estate: 1-to-4 family mortgage 440,202 9,522 7,767 457,491 Residential line of credit 192,427 1,184 1,375 194,986 Multi-family mortgage 61,234 142 978 62,354 Commercial real estate: Owner occupied 451,140 28,308 4,462 483,910 Non-owner occupied 517,253 14,199 1,972 533,424 Consumer and other 189,081 2,712 589 192,382 Total loans, excluding purchased credit impaired loans $ 2,940,174 $ 114,401 $ 23,501 $ 3,078,076 Purchased credit impaired loans Commercial and industrial $ — $ 1,499 $ 645 $ 2,144 Construction — 3,324 4,404 7,728 Residential real estate: 1-to-4 family mortgage — 20,284 3,214 23,498 Residential line of credit — — — — Multi-family mortgage — — 20 20 Commercial real estate: Owner occupied — 4,631 7,331 11,962 Non-owner occupied — 7,359 10,805 18,164 Consumer and other — 19,751 5,568 25,319 Total purchased credit impaired loans $ — $ 56,848 $ 31,987 $ 88,835 Total loans $ 2,940,174 $ 171,249 $ 55,488 $ 3,166,911 PCI loans are considered past due or delinquent when the contractual principal or interest due in accordance with the terms of the loan agreement remains unpaid after the due date of the scheduled payment. However, these loans are considered to be performing, even though they may be contractually past due, as any non-payment of contractual principal or interest is considered in the periodic re-estimation of expected cash flows and is included in the resulting recognition of current period covered loan loss provision or future period yield adjustments. The accrual of interest is discontinued on PCI loans if management can no longer reliably estimate future cash flows on the loan. No PCI loans were classified as nonaccrual at March 31, 2018 or December 31, 2017 as the carrying value of the respective loan or pool of loans cash flows were considered estimable and probable of collection. Nonperforming loans include loans that are no longer accruing interest (non-accrual loans) and loans past due ninety or more days and still accruing interest. Nonperforming loans and impaired loans are defined differently. Some loans may be included in both categories, whereas other loans may only be included in one category. The following table provides the period-end amounts of loans that are past due thirty to eighty-nine days, past due ninety or more days and still accruing interest, loans not accruing interest, loans current on payments accruing interest and purchased credit impaired loans by category at March 31, 2018 and December 31, 2017: March 31, 2018 30-89 days past due 90 days or more and accruing interest Non-accrual loans Loans current on payments and accruing interest Purchased Credit Impaired loans Total Commercial and industrial $ 1,385 $ 619 $ 910 $ 760,250 $ 1,951 $ 765,115 Construction 250 329 460 458,031 7,425 466,495 Residential real estate: 1-to-4 family mortgage 3,666 1,067 2,009 462,079 22,904 491,725 Residential line of credit 1,013 356 370 196,001 — 197,740 Multi-family mortgage — — — 63,277 18 63,295 Commercial real estate: Owner occupied 202 — 1,903 485,456 11,770 499,331 Non-owner occupied 393 — 1,219 542,452 18,064 562,128 Consumer and other 1,640 318 83 173,173 23,620 198,834 Total $ 8,549 $ 2,689 $ 6,954 $ 3,140,719 $ 85,752 $ 3,244,663 December 31, 2017 30-89 days past due 90 days or more and accruing interest Non-accrual loans Loans current on payments and accruing interest Purchased Credit Impaired loans Total Commercial and industrial $ 5,859 $ 90 $ 533 $ 706,449 $ 2,144 $ 715,075 Construction 1,412 241 300 438,645 7,728 448,326 Residential real estate: 1-to-4 family mortgage 4,678 956 2,548 449,309 23,498 480,989 Residential line of credit 527 134 699 193,626 — 194,986 Multi-family mortgage — — — 62,354 20 62,374 Commercial real estate: Owner occupied 521 358 2,582 480,449 11,962 495,872 Non-owner occupied 121 — 1,371 531,932 18,164 551,588 Consumer and other 1,945 217 68 190,152 25,319 217,701 Total $ 15,063 $ 1,996 $ 8,101 $ 3,052,916 $ 88,835 $ 3,166,911 Impaired loans recognized in conformity with ASC 310 at March 31, 2018 and December 31, 2017, segregated by class, were as follows: March 31, 2018 Recorded investment Unpaid principal Related allowance With a related allowance recorded: Commercial and industrial $ 52 $ 52 $ 19 Residential real estate: 1-to-4 family mortgage 191 492 16 Commercial real estate: Owner occupied 585 646 95 Non-owner occupied 142 149 29 Total $ 970 $ 1,339 $ 159 With no related allowance recorded Commercial and industrial $ 1,333 $ 1,539 $ — Construction 1,285 1,313 — Residential real estate: 1-to-4 family mortgage 1,301 1,306 — Multi-family mortgage 964 964 — Commercial real estate: Owner occupied 1,565 2,077 — Non-owner occupied 1,571 2,320 — Consumer and other 29 29 — Total $ 8,048 $ 9,548 $ — Total impaired loans $ 9,018 $ 10,887 $ 159 December 31, 2017 Recorded investment Unpaid principal Related allowance With a related allowance recorded: Commercial and industrial $ 53 $ 53 $ 20 Construction — — — Residential real estate: 1-to-4 family mortgage 194 495 18 Commercial real estate: Owner occupied 844 1,123 120 Non-owner occupied 144 150 33 Consumer and other — — — Total $ 1,235 $ 1,821 $ 191 With no related allowance recorded: Commercial and industrial $ 1,526 $ 1,570 $ — Construction 1,289 1,313 — Residential real estate: 1-to-4 family mortgage 1,068 1,072 — Multi-family mortgage 978 978 — Commercial real estate: Owner occupied 1,676 2,168 — Non-owner occupied 1,576 2,325 — Consumer and other 25 25 — Total $ 8,138 $ 9,451 $ — Total impaired loans $ 9,373 $ 11,272 $ 191 Average recorded investment and interest income on a cash basis recognized during the three months ended March 31, 2018 and 2017 on impaired loans, segregated by class, were as follows: Three Months Ended March 31, 2018 Average recorded investment Interest income recognized (cash basis) With a related allowance recorded: Commercial and industrial $ 53 $ 1 Construction — — Residential real estate: 1-to-4 family mortgage 193 2 Residential line of credit — — Multi-family mortgage — — Commercial real estate: Owner occupied 715 6 Non-owner occupied 143 2 Consumer and other — — Total $ 1,104 $ 11 With no related allowance recorded: Commercial and industrial $ 1,430 $ 16 Construction 1,287 30 Residential real estate: 1-to-4 family mortgage 1,185 13 Residential line of credit — — Multi-family mortgage 971 12 Commercial real estate: Owner occupied 1,621 32 Non-owner occupied 1,574 7 Consumer and other 27 — Total $ 8,095 $ 110 Total impaired loans $ 9,199 $ 121 March 31, 2017 With a related allowance recorded: Commercial and industrial $ 791 $ 5 Construction — — Residential real estate: 1-to-4 family mortgage 101 — Residential line of credit — — Multi-family mortgage — — Commercial real estate: Owner occupied 629 12 Non-owner occupied 835 — Consumer and other 1 — Total $ 2,357 $ 17 With no related allowance recorded: Commercial and industrial $ 584 $ 9 Construction 1,496 5 Residential real estate: 1-to-4 family mortgage 2,243 17 Residential line of credit 156 — Multi-family mortgage 1,021 11 Commercial real estate: Owner occupied 1,977 38 Non-owner occupied 1,325 — Consumer and other 26 1 Total $ 8,828 $ 81 Total impaired loans $ 11,185 $ 98 As of March 31, 2018 and December 31, 2017, the Company has a recorded investment in troubled debt restructurings of $8,675 and $8,604, respectively. The modifications included extensions of the maturity date and/or a stated rate of interest to one lower than the current market rate. The Company has allocated $159 and $172 of specific reserves for those loans at March 31, 2018 and December 31, 2017, respectively, and has committed to lend additional amounts totaling up to $3 and $2, respectively to these customers. Of these loans, $3,233 and $3,205 were classified as non-accrual loans as of March 31, 2018 and December 31, 2017. The following tables present the financial effect of TDRs recorded during the three months ended March 31, 2018 and 2017: Three Months Ended March 31, 2018 Number of loans Pre-modification outstanding recorded investment Post-modification outstanding recorded investment Charge offs and specific reserves Residential real estate: 1-to-4 family mortgage 1 $ 249 $ 249 $ — Consumer and other 1 5 5 — Total 2 $ 254 $ 254 $ — Three Months Ended March 31, 2017 Number of loans Pre-modification outstanding recorded investment Post-modification outstanding recorded investment Charge offs and specific reserves Residential real estate: 1-to-4 family mortgage 1 $ 5 $ 5 $ — Commercial real estate: Owner occupied 1 377 377 — Non-owner occupied 2 711 711 — Total 4 $ 1,093 $ 1,093 $ — There were no loans modified as troubled debt restructurings for which there was a payment default within twelve months following the modification during the three months ended March 31, 2018 or 2017. A loan is considered to be in payment default once it is 90 days contractually past due under the modified terms. The terms of certain other loans were modified during the three months ended March 31, 2018 and 2017 that did not meet the definition of a troubled debt restructuring. The modification of these loans involved either a modification of the terms of a loan to borrowers who were not experiencing financial difficulties or a delay in a payment that was considered to be insignificant. In order to determine whether a borrower is experiencing financial difficulty, an evaluation is performed of the probability that the borrower will be in payment default on any of its debt in the foreseeable future without the modification. This evaluation is performed under the company’s internal underwriting policy.

Other Real Estate Owned

Other Real Estate Owned	3 Months Ended
	Mar. 31, 2018
Real Estate [Abstract]
Other Real Estate Owned	Note (5)—Other real estate owned: The amount reported as other real estate owned includes property acquired through foreclosure in addition to excess facilities held for sale and is carried at fair value less estimated cost to sell the property. The following table summarizes other real estate owned for the three months ended March 31, 2018 and 2017: Three Months Ended March 31, 2018 2017 Balance at beginning of period $ 16,442 $ 7,403 Transfers from loans 630 888 Properties sold (1,432 ) (2,228 ) (Loss) gain on sale of other real estate owned (43 ) 871 Transferred to loans (120 ) — Write-downs and partial liquidations (143 ) (123 ) Balance at end of period $ 15,334 $ 6,811 Foreclosed residential real estate properties included in the table above totaled $3,902 and $3,631

Mortgage Servicing Rights

Mortgage Servicing Rights	3 Months Ended
	Mar. 31, 2018
Transfers And Servicing Of Financial Assets [Abstract]
Mortgage servicing rights	Note (6)—Mortgage servicing rights: Changes in the Company’s mortgage servicing rights were as follows for the three months ended March 31, 2018 and 2017: Three Months Ended March 31, 2018 2017 Carrying value prior to policy change $ 76,107 $ 32,070 Fair value impact of change in accounting policy — 1,011 Carrying value at beginning of period 76,107 33,081 Capitalization 13,510 15,013 Change in fair value: Due to pay-offs/pay-downs (3,060 ) (265 ) Due to change in valuation inputs or assumptions 6,603 (236 ) Carrying value at March 31 $ 93,160 $ 47,593 The following table summarizes servicing income and expense included in mortgage banking income and other noninterest expense within the Mortgage Segment operating results, respectively, for the three months ended March 31, 2018 and 2017, respectively: Three Months Ended March 31, 2018 2017 Servicing income: Servicing income $ 4,793 $ 2,748 Change in fair value of mortgage servicing rights 3,543 (501 ) Change in fair value of mortgage servicing rights hedging instruments (5,256 ) — Gross servicing income 3,080 2,247 Gross direct servicing expenses 1,795 1,020 Net servicing income $ 1,285 $ 1,227 Data and key economic assumptions related to the Company’s mortgage servicing rights as of March 31, 2018 and December 31, 2017 are as follows: March 31, December 31, 2018 2017 Unpaid principal balance $ 7,423,932 $ 6,529,431 Weighted-average prepayment speed (CPR) 7.69 % 8.90 % Estimated impact on fair value of a 10% increase (2,997 ) (3,026 ) Estimated impact on fair value of a 20% increase (5,780 ) (5,855 ) Discount rate 10.01 % 9.75 % Estimated impact on fair value of a 100 bp increase (3,829 ) (3,052 ) Estimated impact on fair value of a 200 bp increase (7,379 ) (5,867 ) Weighted-average coupon interest rate 3.98 % 3.94 % Weighted-average servicing fee (basis points) 28 28 Weighted-average remaining maturity (in months) 322 335 From time to time, the Company enters agreements to sell certain tranches of mortgage servicing rights. Upon consummation of the sale, the Company continues to subservice the underlying mortgage loans until they can be transferred to the purchaser. As of March 31, 2018 and December 31, 2017, there were no loans being serviced that related to the sale of mortgage servicing rights.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Note (7)—Income taxes: Allocation of federal and state income taxes between current and deferred portions is as follows: For the three months ended March 31, 2018 2017 Current $ — $ — Deferred 5,482 5,425 Total $ 5,482 $ 5,425 Federal income tax expense for the three months ended March 31, 2018 and 2017 differs from the statutory federal rates of 21% and 35%, respectively, due to the following: For the three months ended March 31, 2018 2017 Federal taxes calculated at statutory rate $ 5,300 21.0 % $ 5,305 35.0 % Increase (decrease) resulting from: State taxes, net of federal benefit 1,143 4.5 % 610 4.0 % Benefit of equity based compensation (736 ) -3.0 % (195 ) -1.3 % Municipal interest income (201 ) -0.8 % (366 ) -2.4 % Bank owned life insurance (12 ) 0.0 % (21 ) -0.2 % Other (12 ) 0.0 % 92 0.6 % Income tax expense, as reported $ 5,482 21.7 % $ 5,425 35.7 % The components of the net deferred tax liability at March 31, 2018 and December 31, 2017, are as follows: March 31, December 31, 2018 2017 Deferred tax assets: Allowance for loan losses $ 6,359 $ 6,264 Amortization of core deposit intangible 832 759 Deferred compensation 3,711 6,158 Unrealized loss on available-for-sale debt securities 3,830 988 Other 5,501 3,599 Subtotal 20,233 17,768 Deferred tax liabilities: FHLB stock dividends (550 ) (550 ) Depreciation (4,344 ) (4,115 ) Cash flow hedges (866 ) — Mortgage servicing rights (24,274 ) (19,830 ) Other (5,564 ) (5,131 ) Subtotal (35,598 ) (29,626 ) Net deferred tax liability $ (15,365 ) $ (11,858 ) For the first quarter of 2018, the Company has a federal net operating loss carryforward of approximately $6.9 million and state net operating losses of $5.8 million. The Company projects that it will fully utilize these losses during the remainder of 2018. If not utilized, the Federal net operating loss will carry forward indefinitely and the state net operating losses will begin to expire in 2030. Tax periods for all fiscal years after 2013 remain open to examination by the federal and state taxing jurisdictions to which the Company is subject.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2018
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note (8)—Commitments and contingencies: Some financial instruments, such as loan commitments, credit lines, letters of credit, and overdraft protection, are issued to meet customer financing needs. These are agreements to provide credit or to support the credit of others, as long as conditions established in the contract are met, and usually have expiration dates. Commitments may expire without being used. Off-balance sheet risk to credit loss exists up to the face amount of these instruments, although material losses are not anticipated. The same credit policies are used to make such commitments as are used for loans, including obtaining collateral at exercise of the commitment. March 31, December 31, 2018 2017 Commitments to extend credit, excluding interest rate lock commitments $ 959,271 $ 977,276 Letters of credit 22,214 22,882 Balance at end of period $ 981,485 $ 1,000,158 In connection with the sale of mortgage loans to third party investors, the Bank makes usual and customary representations and warranties as to the propriety of its origination activities. Occasionally, the investors require the Bank to repurchase loans sold to them under the terms of the warranties. When this happens, the loans are recorded at fair value with a corresponding charge to a valuation reserve. The total principal amount of loans repurchased (or indemnified for) was $1,119 and $849 For the three months ended March 31, 2018 2017 Balance at beginning of period $ 3,386 $ 2,659 Provision for loan repurchases or indemnifications 186 183 Recoveries on previous losses (58 ) — Balance at end of period $ 3,514 $ 2,842

Derivatives

Derivatives	3 Months Ended
	Mar. 31, 2018
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivatives	Note (9)—Derivatives: The Company utilizes derivative financial instruments as part of its ongoing efforts to manage its interest rate risk exposure as well as the exposure for its customers. Derivative financial instruments are included in the Consolidated Balance Sheets line item “Other assets” or “Other liabilities” at fair value in accordance with ASC 815, “ Derivatives and Hedging The Company enters into commitments to originate loans whereby the interest rate on the loan is determined prior to funding (rate-lock commitments). Under such commitments, interest rates for a mortgage loan are typically locked in for forty-five days with the customer. These interest rate lock commitments are recorded at fair value in the Company’s Consolidated Balance Sheets. The Company also enters into best effort or mandatory delivery forward commitments to sell residential mortgage loans to secondary market investors. Gains and losses arising from changes in the valuation of the rate-lock commitments and forward commitments are recognized currently in earnings and are reflected under the line item “Mortgage banking income” on the Consolidated Statements of Income. The Company enters into forward commitments, futures and options contracts that are not designated as hedging instruments as economic hedges of the change in the fair value of its MSRs. Gains and losses associated with these instruments are included in earnings and are reflected under the line item “Mortgage banking income” on the Consolidated Statements of Income. The Company enters into derivative instruments that are not designated as hedging instruments to help its commercial customers manage their exposure to interest rate fluctuations. To mitigate the interest rate risk associated with customer contracts, the Company enters into an offsetting derivative contract. The Company manages its credit risk, or potential risk of default by its commercial customers through credit limit approval and monitoring procedures. In June of 2017, the Company entered into two interest rate swap agreements with notional amounts totaling $30,000 to hedge interest rate exposure on outstanding subordinate debentures included in long-term debt totaling $30,930. Under these agreements, the Company receives a variable rate of interest and pays a fixed rate of interest. The interest rate swap contracts, which mature in June of 2024, are designated as cash flow hedges with the objective of reducing the variability in cash flows resulting from changes in interest rates. As of March 31, 2018 and December 31, 2017, the fair value of these contracts was $1,037 In July of 2017, the Company entered into three interest rate swap contracts on floating rate liabilities at the Bank level with notional amounts of $30,000, $35,000 and $35,000 for a period of three, four and five years, respectively. These interest rate swaps are designated as cash flow hedges with the objective of reducing the variability of cash flows associated with $100,000 of short-term FHLB borrowings obtained in conjunction with the Clayton Bank acquisition. Under these contracts, the Company receives a variable rate of interest and pays a fixed rate of interest. As of December 31, 2017, the fair value of these contracts was $1,127 included in those designated as hedging below. During the three months ended March 31, 2018, these swaps were cancelled, locking in a gain of $1,564 in other comprehensive income to be accreted over the three, four and five year terms of the underlying contracts. Certain financial instruments, including derivatives, may be eligible for offset in the Consolidated Balance Sheet when the “right of setoff” exists or when the instruments are subject to an enforceable master netting agreement, which includes the right of the non-defaulting party or non-affected party to offset recognized amounts, including collateral posted with the counterparty, to determine a net receivable or net payable upon early termination of the agreement. Certain of the Company’s derivative instruments are subject to master netting agreements. The Company has not elected to offset such financial instruments in the Consolidated Balance Sheets. The following tables provide details on the Company’s derivative financial instruments as of the dates presented: March 31, 2018 Notional Amount Asset Liability Not designated as hedging: Interest rate contracts $ 175,726 $ 2,360 $ 2,360 Forward commitments 919,571 — 1,295 Interest rate-lock commitments 692,977 10,179 — Futures contracts 243,000 1,180 — Option contracts 22,000 148 — Total $ 2,053,274 $ 13,867 $ 3,655 December 31, 2017 Notional Amount Asset Liability Not designated as hedging: Interest rate contracts $ 146,754 $ 1,146 $ 1,146 Forward commitments 870,574 — 553 Interest rate-lock commitments 504,156 6,768 — Futures contracts 283,000 315 — Option contracts 6,000 29 — Total $ 1,810,484 $ 8,258 $ 1,699 March 31, 2018 Notional Amount Asset Liability Designated as hedging: Interest rate swaps $ 30,000 $ 1,037 $ — Total $ 30,000 $ 1,037 $ — December 31, 2017 Notional Amount Asset Liability Designated as hedging: Interest rate swaps $ 130,000 $ 1,432 $ — Total $ 130,000 $ 1,432 $ — Gains (losses) included in the Consolidated Statements of Income related to the Company’s derivative financial instruments were as follows: Three Months Ended March 31, 2018 2017 Not designated as hedging instruments (included in mortgage banking income): Interest rate lock commitments $ 3,411 $ 2,942 Forward commitments 5,318 (3,320 ) Futures contracts (2,447 ) — Options contracts 43 — Total $ 6,325 $ (378 ) Three Months Ended March 31, 2018 2017 Designated as hedging: Amount of gain reclassified from other comprehensive income and recognized in interest expense on long-term debt $ (32) — The following table discloses the amount included in other comprehensive income (loss), net of tax, for derivative instruments designated as cash flow hedges for the periods presented: Three Months Ended March 31, 2018 2017 Designated as hedging: Amount of gain recognized in other comprehensive income, net of tax $ 1,273 —

Fair Value of Financial Instrum

Fair Value of Financial Instruments	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Fair value of financial instruments	Note (10)—Fair value of financial instruments: FASB ASC 820-10 defines fair value as the exchange price that would be received for an asset or paid to transfer a liability (exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. ASC 820-10 also establishes a framework for measuring the fair value of assets and liabilities according to a hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three broad levels. The fair value hierarchy gives the highest priority to quoted prices in active markets for identical assets and liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). The hierarchy maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used when available. Observable inputs are inputs that market participants would use in pricing the asset or liability based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that are derived from assumptions based on management’s estimate of assumptions that market participants would use in pricing the asset or liability based on the best information available under the circumstances. The hierarchy is broken down into the following three levels, based on the reliability of inputs: Level 1: Unadjusted quoted prices in active markets for identical assets or liabilities that are accessible at the measurement date. Level 2: Significant other observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active or other inputs that are observable or can be corroborated by observable market data. Level 3: Significant unobservable inputs for assets or liabilities that are derived from assumptions based on management’s estimate of assumptions that market participants would use in pricing the assets or liabilities. The Company records the fair values of financial assets and liabilities on a recurring and non-recurring basis using the following methods and assumptions: During the first quarter of 2018, the Company adopted ASU 2016-01, “Recognition and Measurement of Financial Assets and Liabilities.” The amendments included within this standard, which are applied prospectively, require the Company to disclose fair value of financial instruments measured at amortized cost on the balance sheet to measure the fair value using an exit price notion. Prior to adopting the amendments included in the standard, the Company measured fair value under an entry price notion. Investment securities—Investment securities are recorded at fair value on a recurring basis. Fair values for securities are based on quoted market prices, where available. If quoted prices are not available, fair values are based on quoted market prices of similar instruments or are determined by matrix pricing, which is a mathematical technique widely used in the industry to value debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the pricing relationship or correlation among other benchmark quoted securities. Investment securities valued using quoted market prices of similar instruments or that are valued using matrix pricing are classified as Level 2. When significant inputs to the valuation are unobservable, the available-for-sale securities are classified within Level 3 of the fair value hierarchy. Where no active market exists for a security or other benchmark securities, fair value is estimated by the Company with reference to discount margins for other high risk securities. Loans held for sale—Loans held for sale are carried at fair value. Fair value is used is determined using current secondary market prices for loans with similar characteristics, that is, using Level 2 inputs. Derivatives—The fair value of the interest rate swaps are based upon fair values provided from entities that engage in interest rate swap activity and is based upon projected future cash flows and interest rates. Fair value of commitments is based on fees currently charged to enter into similar agreements, and for fixed-rate commitments, the difference between current levels of interest rates and the committed rates is also considered. These financial instruments are classified as Level 2. Other real estate owned—Other real estate owned (“REO”) is comprised of commercial and residential real estate obtained in partial or total satisfaction of loan obligations and excess land and facilities held for sale. REO acquired in settlement of indebtedness is recorded at the lower of the carrying amount of the loan or the fair value of the real estate less costs to sell. Fair value is determined on a nonrecurring basis based on appraisals by qualified licensed appraisers and is adjusted for management’s estimates of costs to sell and holding period discounts. The valuations are classified as Level 3. Mortgage servicing rights—Servicing rights are carried at fair value. Fair value is determined using an income approach with various assumptions including expected cash flows, market discount rates, prepayment speeds, servicing costs, and other factors. Mortgage servicing rights are disclosed as Level 3. Impaired loans—Loans considered impaired under FASB ASC 310, Receivables, are loans for which, based on current information and events, it is probable that the creditor will be unable to collect all amounts due according to the contractual terms of the loan agreement. Fair value adjustments for impaired loans are recorded on a non-recurring basis as either partial write downs based on observable market prices or current appraisal of the collateral. Impaired loans are classified as Level 3. The following table contains the estimated fair values and the related carrying values of the Company's financial instruments. Items which are not financial instruments are not included. Due to the adoption of ASU 2016-01 as of January 1, 2018, the fair value as presented below is measured using the exit price notion in the periods after adoption and may not be comparable with prior periods presented as a result of the change in methodology. Fair Value March 31, 2018 Carrying amount Level 1 Level 2 Level 3 Total Financial assets: Cash and cash equivalents $ 73,700 $ 73,700 $ — $ — $ 73,700 Investment securities 597,347 — 597,347 — 597,347 Federal Home Loan Bank Stock 11,810 N/A N/A N/A N/A Loans, net 3,220,257 — — 3,213,659 3,213,659 Loans held for sale 414,518 — 414,518 — 414,518 Interest receivable 13,920 — 13,920 — 13,920 Mortgage servicing rights 93,160 — — 93,160 93,160 Derivatives 14,904 — 14,904 — 14,904 Financial liabilities: Deposits: Without stated maturities $ 3,059,142 $ 3,059,142 $ — $ — $ 3,059,142 With stated maturities 707,009 — 706,585 — 706,585 Securities sold under agreement to repurchase 14,724 14,724 — — 14,724 Short term borrowings 138,707 138,707 — — 138,707 Interest payable 1,857 526 1,331 — 1,857 Long-term debt 139,586 — 138,456 — 138,456 Derivatives 3,655 — 3,655 — 3,655 Fair Value December 31, 2017 Carrying amount Level 1 Level 2 Level 3 Total Financial assets: Cash and cash equivalents $ 119,751 $ 119,751 $ — $ — $ 119,751 Investment securities 543,992 — 540,388 3,604 543,992 Federal Home Loan Bank Stock 11,412 N/A N/A N/A N/A Loans, net 3,142,870 — 3,064,373 77,027 3,141,400 Loans held for sale 526,185 — 526,185 — 526,185 Interest receivable 13,069 — 13,069 — 13,069 Mortgage servicing rights, net 76,107 — — 76,107 76,107 Derivatives 9,690 — 9,690 — 9,690 Financial liabilities: Deposits: Without stated maturities $ 2,976,066 $ 2,976,066 $ — $ — $ 2,976,066 With stated maturities 688,329 — 682,403 — 682,403 Securities sold under agreement to repurchase 14,293 14,293 — — 14,293 Short term borrowings 190,000 190,000 — — 190,000 Interest payable 1,504 575 929 — 1,504 Long-term debt 143,302 — 149,135 — 149,135 Derivatives 1,699 — 1,699 — 1,699 The balances and levels of the assets measured at fair value on a recurring basis at March 31, 2018 are presented in the following tables: At March 31, 2018 Quoted prices in active markets for identical assets (liabilities) (level 1) Significant other observable inputs (level 2) Significant unobservable inputs (level 3) Total Recurring valuations: Financial assets: Investment securities: U.S. government agency securities $ — $ 982 $ — $ 982 Mortgage-backed securities — 472,930 — 472,930 Municipals, tax-exempt — 113,158 — 113,158 Treasury securities — 7,178 — 7,178 Equity securities — 3,099 — 3,099 Total $ — $ 597,347 $ — $ 597,347 Loans held for sale — 414,518 — 414,518 Mortgage servicing rights — — 93,160 93,160 Derivatives — 14,904 — 14,904 Financial Liabilities: Derivatives $ — $ 3,655 $ — $ 3,655 The balances and levels of the assets measured at fair value on a non-recurring basis at March 31, 2018 are presented in the following tables: At March 31, 2018 Quoted prices in active markets for identical assets (liabilities) (level 1) Significant other observable inputs (level 2) Significant unobservable inputs (level 3) Total Non-recurring valuations: Financial assets: Other real estate owned $ — $ — $ 800 $ 800 Impaired loans: Commercial and industrial — — — — Construction Residential real estate: 1-4 family mortgage — — 144 144 Commercial real estate: — — — — Owner occupied Non-owner occupied — — — — Consumer and other — — — — Total $ — $ — $ 144 $ 144 The balances and levels of the assets measured at fair value on a recurring basis at December 31, 2017 are presented in the following tables: At December 31, 2017 Quoted prices in active markets for identical assets (liabilities) (level 1) Significant other observable inputs (level 2) Significant unobservable inputs (level 3) Total Recurring valuations: Financial assets: Available-for-sale securities: U.S. government agency securities $ — $ 986 $ — $ 986 Mortgage-backed securities — 418,781 — 418,781 Municipals, tax-exempt — 109,251 — 109,251 Treasury securities — 7,252 — 7,252 Equity securities — 4,118 3,604 7,722 Total $ — $ 540,388 $ 3,604 $ 543,992 Loans held for sale — 526,185 — 526,185 Mortgage servicing rights — — 76,107 76,107 Derivatives — 9,690 — 9,690 Financial Liabilities: Derivatives $ — $ 1,699 $ — $ 1,699 The balances and levels of the assets measured at fair value on a non-recurring basis at December 31, 2017 are presented in the following tables: At December 31, 2017 Quoted prices in active markets for identical assets (liabilities) (level 1) Significant other observable inputs (level 2) Significant unobservable inputs (level 3) Total Non-recurring valuations: Financial assets: Other real estate owned $ — $ — $ 13,174 $ 13,174 Impaired Loans: Commercial and industrial — — 1,971 1,971 Construction — — 4,211 4,211 Residential real estate: 1-4 family mortgage — — 21,902 21,902 Commercial real estate: Owner occupied — — 10,030 10,030 Non-owner occupied — — 13,593 13,593 Consumer and other — — 25,320 25,320 Total $ — $ — $ 77,027 $ 77,027 There were no transfers between Level 1, 2 or 3 during the periods presented. The following table summarizes changes in fair value on available-for-sale securities measured at fair value on a recurring basis using significant unobservable inputs, or Level 3 inputs, during the three months ended March 31, 2018 and 2017. Investment securities Three Months Ended March 31, 2018 2017 Balance at beginning of period $ 3,604 $ 4,549 Reclassification of equity securities without a readily determinable fair value to other assets (1) (3,604 ) — Balance at end of period $ — $ 4,549 (1) See Note 1, “Basis of Presentation” in the Notes to the consolidated financial statements for additional details regarding the adoption of ASU 2016-01, Recognition and Measurement of Financial Assets and Liabilities. As of December 31, 2017, there was no established market for certain other securities, and as such, the Company had estimated that historical costs approximated market value. As of January 1, 2018, the Company adopted ASU 2016-01 (See Note 1) and reclassified $3,604 of these other securities without readily determinable market values to other assets. The following table presents information as of March 31, 2018 about significant unobservable inputs (Level 3) used in the valuation of assets measured at fair value on a nonrecurring basis: Financial instrument Fair Valuation technique Significant Unobservable inputs Range of inputs Impaired loans $ 144 Valuation of collateral Discount for comparable sales 0%-30% Other real estate owned $ 800 Appraised value of property less costs to sell Discount for costs to sell 0%-15% The following table presents information as of December 31, 2017 about significant unobservable inputs (Level 3) used in the valuation of assets measured at fair value on a nonrecurring basis: Financial instrument Fair Valuation technique Significant Unobservable inputs Range of inputs Impaired loans $ 77,027 Valuation of collateral Discount for comparable sales 0%-30% Other real estate owned $ 13,174 Appraised value of property less costs to sell Discount for costs to sell 0%-15% Appraisals for both collateral-dependent impaired loans and other real estate owned are performed by certified general appraisers (for commercial properties) or certified residential appraisers (for residential properties) whose qualifications and licenses have been reviewed and verified by the Company. Once received, a member of the lending administrative department reviews the assumptions and approaches utilized in the appraisal as well as the overall resulting fair value in comparison with independent data sources such as recent market data or industry wide statistics. Fair value option: The Company elected to measure all loans originated for sale at fair value under the fair value option as permitted under ASC 825. Electing to measure these assets at fair value reduces certain timing differences and better matches the changes in fair value of the loans with changes in the fair value of derivative instruments used to economically hedge them. Net gains of $2,121 and $7,606 resulting from fair value changes of the mortgage loans were recorded in income during the three months ended March 31, 2018 and 2017, respectively. The amount does not reflect changes in fair values of related derivative instruments used to hedge exposure to market-related risks associated with these mortgage loans. The change in fair value of both loans held for sale and the related derivative instruments are recorded in Mortgage Banking Income in the Consolidated Statements of Income. Election of the fair value option allows the Company to reduce the accounting volatility that would otherwise result from the asymmetry created by accounting for the financial instruments at the lower of cost or fair value and the derivatives at fair value. The fair value option election does not apply to the GNMA optional repurchase loans recorded as of December 31, 2017 which do not meet the requirements under FASB ASC Topic 825 to be accounted for under the fair value option. At March 31, 2018, there were $45,933 of delinquent GNMA loans that had previously been sold. The Company determined there not to be a more-than-trivial benefit based on an analysis of interest rates on an assessment of potential reputational risk associated with these loans. As such, the Company had $0 in rebooked GNMA loans included in loans held for sale as of March 31, 2018. GNMA optional repurchase loans totaled $43,035 at December 31, 2017 and are included in loans held for sale on the accompanying Consolidated Balance Sheet. See Note 1, “Basis of presentation” in the Notes to the consolidated financial statements for additional details regarding rebooked GNMA loans. The Company’s valuation of loans held for sale incorporates an assumption for credit risk; however, given the short-term period that the Company holds these loans, valuation adjustments attributable to instrument-specific credit risk is nominal. Interest income on loans held for sale measured at fair value is accrued as it is earned based on contractual rates and is reflected in loan interest income in the Consolidated Statements of Income. The following table summarizes the differences between the fair value and the principal balance for loans held for sale measured at fair value as of March 31, 2018 and December 31, 2017: March 31, 2018 Aggregate fair value Aggregate Unpaid Principal Balance Difference Mortgage loans held for sale measured at fair value $ 414,017 $ 401,087 $ 12,930 Past due loans of 90 days or more — — — Nonaccrual loans 501 501 — December 31, 2017 Mortgage loans held for sale measured at fair value $ 482,089 $ 467,039 $ 15,050 Past due loans of 90 days or more 320 320 — Nonaccrual loans 741 741 —

Segment Reporting

Segment Reporting	3 Months Ended
	Mar. 31, 2018
Segment Reporting [Abstract]
Segment Reporting	Note (11)—Segment reporting: The Company and the Bank are engaged in the business of banking and provide a full range of financial services. The Company determines reportable segments based on the significance of the segment’s operating results to the overall Company, the products and services offered, customer characteristics, processes and service delivery of the segments and the regular financial performance review and allocation of resources by the Chief Executive Officer (“CEO”), the Company’s chief operating decision maker. The Company has identified two distinct reportable segments—Banking and Mortgage. The Company’s primary segment is Banking, which provides a full range of deposit and lending products and services to corporate, commercial and consumer customers. The Company offers full-service conforming residential mortgage products, including conforming residential loans and services through the Mortgage segment utilizing mortgage offices outside of the geographic footprint of the Banking operations as well as internet and correspondent delivery channels. Additionally, the Mortgage Segment includes the servicing of residential retail mortgage loans and the packaging and securitization of loans to governmental agencies. The residential mortgage products and services originated in our Banking footprint and related revenues and expenses are included in our Banking segment. The Company’s mortgage division represents a distinct reportable segment which differs from the Company’s primary business of commercial and retail banking. The financial performance of the Mortgage segment is assessed based on results of operations reflecting direct revenues and expenses and allocated expenses. This approach gives management a better indication of the operating performance of the segment. When assessing the Banking segment’s financial performance the CEO utilizes reports with indirect revenues and expenses including but not limited to the investment portfolio, electronic delivery channels and areas that primarily support the banking segment operations. Therefore these are included in the results of the Banking segment. Other indirect revenue and expenses related to general administrative areas are also included in the internal financial results reports of the Banking segment utilized by the CEO for analysis and are thus included for Banking segment reporting. The Mortgage segment utilizes funding sources from the Banking segment in order to fund mortgage loans that are ultimately sold on the secondary market. The Mortgage segment uses the proceeds from loan sales to repay obligations due to the Banking segment. The following tables provides segment financial information for the three months ended March 31, 2018 and 2017 follows: Three Months Ended March 31, 2018 Banking Mortgage Consolidated Net interest income $ 48,771 $ (342 ) $ 48,429 Provision for loan loss 317 — 317 Mortgage banking income 6,108 22,076 28,184 Change in fair value of mortgage servicing rights (1) — (1,713 ) (1,713 ) Other noninterest income 6,804 — 6,804 Depreciation 978 128 1,106 Amortization of intangibles 853 — 853 Other noninterest mortgage banking expense 5,097 18,782 23,879 Other noninterest expense (2) 30,313 — 30,313 Income before income taxes 24,125 1,111 25,236 Income tax expense 5,482 Net income 19,754 Total assets $ 4,220,543 $ 504,873 $ 4,725,416 Goodwill 137,090 100 137,190 (1) Included in mortgage banking income, net of hedging gains/losses. (2) Included $1,193 in merger and conversion expenses related to the merger with the Clayton Banks. Three Months Ended March 31, 2017 Banking Mortgage Consolidated Net interest income $ 29,856 $ 395 $ 30,251 Provision for loan loss (257 ) — (257 ) Mortgage banking income 5,666 19,915 25,581 Net, change in fair value of mortgage servicing rights (1) — (501 ) (501 ) Other noninterest income 6,007 — 6,007 Depreciation and amortization 864 138 1,002 Amortization of intangibles 392 — 392 Other noninterest mortgage banking expense 4,836 17,532 22,368 Other noninterest expense (2) 22,655 — 22,655 Income before income taxes 13,039 2,139 15,178 Income tax expense 5,425 Net income 9,753 Total assets $ 2,705,118 $ 461,341 $ 3,166,459 Goodwill 46,767 100 46,867 (1) Included in mortgage banking income. (2) Included $487 in merger and conversion expenses related to the merger with the Clayton Banks. Our Banking segment provides our Mortgage segment with an intercompany warehouse line of credit that is used to fund mortgage loans held for sale. The warehouse line of credit, which eliminated in consolidation, had a prime interest rate of 4.75% and 4.00% as of March 31, 2018 and 2017, respectively. The amount of interest paid by our Mortgage segment to our Banking segment under this warehouse line of credit is recorded as interest income to our Banking segment and as interest expense to our Mortgage segment, both of which are included in the calculation of net interest income for each segment. The amount of interest paid by our Mortgage segment to our Banking segment under this warehouse line of credit was $4,508 and $3,551 for the three months ended March 31, 2018 and 2017, respectively.

Minimum Capital Requirements

Minimum Capital Requirements	3 Months Ended
	Mar. 31, 2018
Banking And Thrift [Abstract]
Minimum capital requirements	Note (12)—Minimum capital requirements: Banks and bank holding companies are subject to regulatory capital requirements administered by federal banking agencies. Capital adequacy guidelines and, additionally for banks, prompt corrective action regulations involve quantitative measures of assets, liabilities, and certain off-balance sheet items calculated under regulatory accounting practices. Capital amounts and classifications are also subject to qualitative judgments by regulators. Failure to meet capital requirements can initiate regulatory action. For March 31, 2018 and December 31, 2017 Interim Final Basel III rules require the Bank to maintain minimum amounts and ratios of common equity Tier I capital to risk-weighted assets. Additionally under Basel III rules, the decision was made to opt-out of including accumulated other comprehensive income in regulatory capital. As of March 31, 2018 and December 31, 2017, the Bank and Company met all capital adequacy requirements to which it is subject. Also, as of March 31, 2018, the most recent notification from the Federal Deposit Insurance Corporation (“FDIC”), the Bank was well capitalized under the regulatory framework for prompt corrective action. There are no conditions or events since that notification that management believes have changed the Bank’s category. The table below includes new regulatory capital ratio requirements that became effective on January 1, 2015. Beginning in 2016, an additional conservation buffer was added to the minimum requirements for capital adequacy purposes, subject to a three year phase-in period. As of March 31, 2018 and December 31, 2017, the buffer was 1.88% and 1.25%, respectively. The capital conservative buffer will be fully phased in January 1, 2019 at 2.5 percent. Actual and required capital amounts and ratios are presented below at period-end: Actual For capital adequacy purposes Minimum Capital adequacy with capital buffer To be well capitalized under prompt corrective action provisions Amount Ratio Amount Ratio Amount Ratio Amount Ratio March 31, 2018 Total Capital (to risk-weighted assets) FB Financial Corporation $ 506,921 12.3 % $ 328,636 8.0 % $ 405,865 9.9 % N/A N/A FirstBank 476,454 11.6 % 328,589 8.0 % 405,807 9.9 % $ 410,736 10.0 % Tier 1 Capital (to risk-weighted assets) FB Financial Corporation $ 482,515 11.8 % $ 246,391 6.0 % $ 323,593 7.9 % N/A N/A FirstBank 452,048 11.0 % 246,348 6.0 % 323,537 7.9 % $ 246,348 6.0 % Tier 1 Capital (to average assets) FB Financial Corporation $ 482,515 10.7 % $ 180,043 4.0 % N/A N/A N/A N/A FirstBank 452,048 10.0 % 180,819 4.0 % N/A N/A $ 226,024 5.0 % Common Equity Tier 1 Capital (to risk-weighted assets) FB Financial Corporation $ 452,515 11.0 % $ 184,784 4.5 % $ 261,982 6.4 % N/A N/A FirstBank 452,048 11.0 % 184,761 4.5 % 261,950 6.4 % $ 266,877 6.5 % Actual For capital adequacy purposes Minimum Capital adequacy with capital buffer To be well capitalized under prompt corrective action provisions Amount Ratio Amount Ratio Amount Ratio Amount Ratio December 31, 2017 Total Capital (to risk-weighted assets) FB Financial Corporation $ 496,422 12.0 % $ 330,672 8.0 % $ 382,340 9.3 % N/A N/A FirstBank 466,102 11.3 % 329,984 8.0 % 381,544 9.3 % $ 412,480 10.0 % Tier 1 Capital (to risk-weighted assets) FB Financial Corporation $ 472,381 11.4 % $ 247,969 6.0 % $ 299,629 7.3 % N/A N/A FirstBank 442,061 10.7 % 247,422 6.0 % 298,968 7.3 % $ 247,422 6.0 % Tier 1 Capital (to average assets) FB Financial Corporation $ 472,381 10.5 % $ 180,643 4.0 % N/A N/A N/A N/A FirstBank 442,061 9.8 % 180,987 4.0 % N/A N/A $ 226,234 5.0 % Common Equity Tier 1 Capital (to risk-weighted assets) FB Financial Corporation $ 442,381 10.7 % $ 185,874 4.5 % $ 237,506 5.8 % N/A N/A FirstBank 442,061 10.7 % 185,567 4.5 % 237,113 5.8 % $ 268,041 6.5 %

Stock-Based Compensation

Stock-Based Compensation	3 Months Ended
	Mar. 31, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-Based Compensation	Note (13)—Stock-Based Compensation: The Company granted shares of common stock and restricted stock units as a part of its initial public offering and compensation arrangements for the benefit of employees, executive officers, and directors. Restricted stock unit grants are subject to time-based vesting. The total number of restricted stock units granted represents the maximum number of restricted stock units eligible to vest based upon the service conditions set forth in the grant agreements. Following the initial public offering, participants in the EBI Plans were given the option to elect conversion of their outstanding cash-settled EBI Units to stock-settled EBI Units. At March 31, 2018 and December 31, 2017, there were 29,172 and 67,470 units valued at $1,184 and $2,833, respectively, outstanding under the equity based incentive plans for employees who elected cash settlement of EBI units. Expense related to the cash settled EBI for the three months ended March 31, 2018 and 2017 was $117 and $298, respectively. The following table summarizes information about vested and unvested restricted stock units, excluding cash-settled EBI units discussed above, outstanding at March 31, 2018 and 2017: March 31, 2018 2017 Restricted Stock Units Outstanding Weighted Average Grant Date Fair Value Restricted Stock Units Outstanding Weighted Average Grant Date Fair Value Balance at beginning of period (unvested) 1,214,325 $ 19.97 1,200,848 19.00 Grants 105,429 39.90 73,801 33.48 Released and distributed (vested) (170,160 ) 21.24 (70,687 ) 19.00 Forfeited/expired (5,556 ) 19.00 (544 ) 19.00 Balance at end of period (unvested) 1,144,038 $ 21.11 1,203,418 19.15 The total fair value of restricted stock units vested and released, excluding cash-settled EBI units discussed above, was $3,614 and $1,343 for the three months ended March 31, 2018 and 2017, respectively. The compensation cost related to stock grants and vesting of restricted stock units, excluding cash-settled EBI units discussed above, was $1,811 and $1,352 for the three months ended March 31, 2018 and 2017, respectively. This included a one-time expense of $249 related to the modification of vesting terms of certain grants during the three months ended March 31, 2018. As of March 31, 2018 and December 31, 2017, there were $15,696 and $12,950, respectively, of total unrecognized compensation cost related to nonvested restricted stock units, excluding cash-settled EBI units discussed above, which is expected to be recognized over a weighted-average period of 2.78 Employee Stock Purchase Plan: In 2016, the Company adopted an employee stock purchase plan (“ESPP”) under which employees, through payroll deductions, are able to purchase shares of Company common stock. The purchase price is 95%, of the lower of the market price on the first or last day of the offering period. The maximum number of shares issuable during any offering period is 200,000 shares, and a participant may not purchase more than 725 shares during any offering period (and, in any event, no more than $25,000 worth of common stock in any calendar year). There were 16,537 shares issued under the ESPP during the three months ended March 31, 2018. There were no such issuances during the three months ended March 31, 2017. As of March 31, 2018 and December 31, 2017, there were 2,444,428 shares and 2,460,965 shares, respectively, available for issuance under the ESPP.

Related party transactions

Related party transactions	3 Months Ended
	Mar. 31, 2018
Related Party Transactions [Abstract]
Related party transactions	Note (14)—Related party transactions: (A) Loans: The Bank has made and expects to continue to make loans to the directors, certain management and executive officers of the Company and their affiliates in the ordinary course of business. An analysis of loans to executive officers, certain management, and directors of the Bank and their affiliates follows: Loans outstanding at January 1, 2018 $ 21,012 New loans and advances 1,611 Repayments (1,537 ) Loans outstanding at March 31, 2018 $ 21,086 Unfunded commitments to certain executive officers and directors and their associates totaled $6,373 and $4,672 at March 31, 2018 and December 31, 2017, respectively. (B) Deposits: The Bank held deposits from related parties totaling $107,453 and $110,465 as of March 31, 2018 and December 31, 2017, respectively. (C) Leases: The Bank leases various office spaces from entities related to the majority shareholder and his son, who is also a Director of the Company, under varying terms. The Company had $132 and $137 in unamortized leasehold improvements related to these leases at March 31, 2018 and December 31, 2017, respectively. These improvements are being amortized over a term not to exceed the length of the lease. Lease expense for these properties totaled $148 and $126 for the three months ended March 31, 2018 and 2017, respectively. (D) Other Investments: The Company holds an investment in a fund that was issued by an entity owned by one of its directors. The balance in the investment was $183 and $200 as of March 31, 2018 and December 31, 2017, respectively. (E) Aviation time sharing agreement: Effective May 24, 2016, the Company entered an aviation time sharing agreement with an entity owned by the majority shareholder and his son, who is also a Director of the Company. This replaces the previous agreement dated December 21, 2012. During the three months ended March 31, 2018 and 2017, the Company made payments of $72 and $25, respectively, under these agreements.

Basis of presentation (Policies

Basis of presentation (Policies)	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Recently Adopted Accounting Principles	Recently adopted accounting principles: On January 1, 2018, the Company adopted the following newly issued accounting standards: In May 2014, the FASB issued an update to Accounting Standards Update (“ASU”) No. 2014-09, “Revenue from Contracts with Customers”. The Company adopted this guidance on January 1, 2018 and all subsequent amendments to the ASU (collectively, “ASC 606”) which (i) creates a single framework for recognizing revenue from contracts with customers that fall within its scope and (ii) revises when it is appropriate to recognize a gain (loss) from the transfer of nonfinancial assets, such as OREO. The majority of the Company’s revenues come from interest income and other sources, including loans, leases, securities and derivatives that are outside the scope of ASC 606. The Company’s services that fall within the scope of ASC 606 are presented within Noninterest income and are recognized as revenue as the Company satisfies its obligation to the customer. Services within the scope of ASC 606 include deposit service charges on deposits, interchange income, investment services and trust income, and the sale of OREO, all within the Banking Segment. The Company has evaluated the effect of this updated on these fee-based income streams and concluded that adoption did not result in a change to the accounting for any of the in-scope revenue streams; as such, no cumulative effect adjustment was recorded. The following is a summary of the implementation considerations for the revenue streams that fall within the scope of Topic 606: • Service charges on deposits, investment services and trust income, and interchange fees — Fees from these services are either transaction based, for which the performance obligations are satisfied when the individual transaction is processed, or set periodic service charges, for which the performance obligations are satisfied over the period the service is provided. Transaction based fees are recognized at the time the transaction is processed, and periodic service charges are recognized over the service period. The adoption of Topic 606 had no impact on the Company's revenue recognition practice for these services. • Gains on sales of other real estate — ASU 2014-09 creates Topic 610-20, under which a gain on sale should be recognized when a contract for sale exists and control of the asset has been transferred to the buyer. Topic 606 list several criteria which must exist to conclude that a contract for sale exists, including a determination that the institution will collect substantially all of the consideration to which it is entitled. This presents a key difference between the current and new guidance related to the recognition of the gain when the institution finances the sale of the property. Rather than basing recognition on the amount of the buyer's initial investment, which was the primary consideration under prior guidance, the analysis is now based on various factors including not only the loan to value, but also the credit quality of the borrower, the structure of the loan, and any other factors that may affect collectability. While these differences may affect the decision to recognize or defer gains on sales of other real estate in circumstances where the Company has financed the sale, the effects are not expected to be material to its financial statements. In January 2016, the FASB released ASU 2016-01, “Recognition and Measurement of Financial Assets and Liabilities.” The main provisions of the update are to eliminate the available for sale classification of accounting for equity securities and adjust the fair value disclosures for financial instruments carried at amortized cost such that the disclosed fair values represent an exit price as opposed to an entry price. The provisions of this update will require that equity securities be carried at fair market value on the balance sheet and any periodic changes in value will be adjustments to the income statement. A practical expedient is provided for equity securities without a readily determinable fair value such that these securities can be carried at cost less any impairment. Results for reporting periods beginning after January 1, 2018 are presented under this method while prior period disclosures are presented under legacy GAAP. The Company recorded a net loss in beginning retained earnings of $109 in connection with this transition. In August 2016, the FASB issued ASU 2016-15, “Statement of Cash Flows - Classification of Certain Cash Receipts and Cash Payments (Topic 230).” ASU 2016-15 provides guidance related to certain cash flow issues in order to reduce the current and potential future diversity in practice. This adoption did not have an impact on our financial statements. In May 2017, the FASB issued ASU 2017-09, “Stock Compensation - Scope of Modification Accounting (Topic 718): Scope of Modification Accounting.” The amendments in this ASU provide guidance on when changes to the terms or conditions of a share-based payment award are to be accounted for as modifications. Under ASU 2017-09, entities are not required to apply modification accounting to a share-based payment award when the award’s fair value, vesting conditions, and classification as an entity or a liability instrument remain the same after the change. ASU 2017-09 is effective for all entities beginning after December 15, 2017 including interim periods within the fiscal year. The adoption of this update on January 1, 2018 did not have a significant impact on the Company’s consolidated financial statements. In August 2017, the FASB issued ASU 2017-12, “Derivatives and Hedging: Targeted Improvements to Accounting for Hedging Activities.” The amendments in this ASU make more financial and non-financial hedging strategies eligible for hedge accounting. It also amends the presentation and disclosure requirements and changes how companies assess effectiveness. There was no impact to the Company’s financial statements or disclosures as a result of this early adoption as of January 1, 2018. Newly issued not yet effective accounting standards: In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842).” The update will require lessees to recognize right-of-use assets and lease liabilities for all leases not considered short term leases. The provisions of the update also include (a) defining direct costs to only include those incremental costs that would not have been incurred if the lease had not been entered into, (b) circumstances under which the transfer contract in a sale-leaseback transaction should be accounted for as the sale of an asset by the seller-lessee and the purchase of an asset by the buyer-lessor, and (c) additional disclosure requirements. The provisions of this update become effective for interim and annual periods beginning after December 15, 2018. Management is currently evaluating the potential impact of this update. In June 2016, the FASB issued ASU 2016-13, “Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.” ASU 2016-13 requires the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts and requires enhanced disclosures related to the significant estimates and judgments used in estimating credit losses, as well as, the credit quality and underwriting standards of an organization’s portfolio. In addition, ASU 2016-13 amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. ASU 2016-13 will become effective for interim and annual periods beginning after December 15, 2019. Management is currently evaluating the potential impact of this update. In March 2017, the FASB issued ASU 2017-08, “Receivables – Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities.” The amendments in this ASU shorten the amortization period for certain callable debt securities held at a premium. Specifically, the amendments require the premium to be amortized to the earliest call date. The amendments do not require an accounting change for securities held at a discount, which continue to be amortized to maturity. Public business entities must prospectively apply the amendments in this ASU to annual periods beginning after December 15, 2018, including interim periods. The adoption of this update will not have an impact on its consolidate financial statements.

Basis of Presentation (Tables)

Basis of Presentation (Tables)	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Summary of Basic and Diluted Earnings Per Common Share	The following is a summary of the basic and diluted earnings per common share calculation for each of the periods presented: Three Months Ended March 31, 2018 2017 Basic earnings per share calculation: Net income $ 19,754 $ 9,753 Weighted-average basic shares outstanding 30,613,284 24,138,437 Basic earnings per share $ 0.65 $ 0.40 Diluted earnings per share: Net income $ 19,754 $ 9,753 Weighted-average basic shares outstanding 30,613,284 24,138,437 Average diluted common shares outstanding 808,546 472,554 Weighted-average diluted shares outstanding 31,421,830 24,610,991 Diluted earnings per share $ 0.63 $ 0.40

Mergers and acquisitions (Table

Mergers and acquisitions (Tables) - Clayton Banks	3 Months Ended
	Mar. 31, 2018
Business Acquisition [Line Items]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	As of December 31, 2017, the Company finalized its valuation of all assets acquired and liabilities assumed, resulting in no material changes to preliminary purchase accounting adjustments. The following tables present the final estimated fair value of net assets acquired as of the July 31, 2017 acquisition date and the consideration paid and an allocation of the purchase price to net assets acquired: As of July 31, 2017 As Recorded by FB Financial Corporation (1) Assets Cash and cash equivalents $ 49,059 Investment securities 59,493 FHLB stock 3,409 Loans 1,059,728 Allowance for loan losses — Premises and equipment 18,866 Other real estate owned 6,888 Intangibles, net 12,334 Other assets 5,978 Total assets $ 1,215,755 Liabilities Interest-bearing deposits $ 670,054 Non-interest bearing deposits 309,464 Borrowings 84,831 Accrued expenses and other liabilities 5,245 Total liabilities $ 1,069,594 Net assets acquired $ 146,161
Schedule of Consideration Paid and Allocation of Purchase Price to Net Assets Acquired	Purchase price: Equity consideration Common stock issued 1,521,200 Price per share as of July 31, 2017 $ 34.37 Total equity consideration $ 52,284 Cash consideration 184,200 (2) Total consideration paid $ 236,484 Preliminary allocation of consideration paid: Fair value of net assets acquired including identifiable intangible assets $ 146,161 Goodwill 90,323 Total consideration paid $ 236,484
Business Acquisition, Pro Forma Information	The pro forma information is not indicative of what would have occurred had the acquisition taken place on January 1, 2016 and does not include the effect of all cost-saving or revenue-enhancing strategies. Three months ended March 31, 2017 Net interest income $ 46,687 Total revenues $ 79,281 Net income $ 16,728

Investment securities (Tables)

Investment securities (Tables)	3 Months Ended
	Mar. 31, 2018
Investments Debt And Equity Securities [Abstract]
Summary of Amortized Cost of Securities and Fair Values	The amortized cost of securities and their fair values at March 31, 2018 and December 31, 2017 are shown below: March 31, 2018 Amortized cost Gross unrealized gains Gross unrealized losses Fair Value Investment Securities Available-for-sale debt securities U.S. government agency securities $ 999 $ — $ (17 ) $ 982 Mortgage-backed securities - residential 486,907 237 (14,214 ) 472,930 Municipals, tax exempt 113,492 1,582 (1,916 ) 113,158 Treasury securities 7,356 — (178 ) 7,178 Total $ 608,754 $ 1,819 $ (16,325 ) $ 594,248 December 31, 2017 Amortized cost Gross unrealized gains Gross unrealized losses Fair Value Investment Securities Available-for-sale debt securities U.S. government agency securities $ 999 $ — $ (13 ) $ 986 Mortgage-backed securities - residential 425,557 374 (7,150 ) 418,781 Municipals, tax exempt 107,127 2,692 (568 ) 109,251 Treasury securities 7,345 — (93 ) 7,252 Total debt securities 541,028 3,066 (7,824 ) 536,270 Equity and other securities 7,870 1 (149 ) 7,722 Total investment securities $ 548,898 $ 3,067 $ (7,973 ) $ 543,992
Schedule of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity	Therefore, mortgage-backed securities are not included in the maturity categories in the following maturity summary. March 31, 2018 December 31, 2017 Available-for-sale Available-for-sale Amortized cost Fair value Amortized cost Fair value Due in one year or less $ 5,715 $ 5,841 $ 905 $ 925 Due in one to five years 24,165 24,396 28,332 28,878 Due in five to ten years 19,817 19,960 19,218 19,588 Due in over ten years 72,150 71,121 67,016 68,098 121,847 121,318 115,471 117,489 Mortgage-backed securities - residential 486,907 472,930 425,557 418,781 Total debt securities $ 608,754 $ 594,248 $ 541,028 $ 536,270
Summary of Sales and Impairment of Available-for-Sale Securities	Sales and impairment of available-for-sale securities were as follows: Three Months Ended March 31, 2018 2017 Proceeds from sales $ 221 $ — Gross realized gains — — Gross realized losses 9 —
Schedule of Gross Unrealized Losses	The following tables show gross unrealized losses at March 31, 2018 and December 31, 2017, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position: March 31, 2018 Less than 12 months 12 months or more Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized loss U.S. government agency securities $ — $ — $ 982 $ 17 $ 982 $ 17 Mortgage-backed securities - residential 163,771 3,236 274,285 10,978 438,056 14,214 Municipals, tax exempt 30,104 762 19,186 1,154 49,290 1,916 Treasury securities 7,177 178 — — 7,177 $ 178 Total debt securities $ 201,052 $ 4,176 $ 294,453 $ 12,149 $ 495,505 $ 16,325 December 31, 2017 Less than 12 months 12 months or more Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized loss U.S. government agency securities $ — $ — $ 986 $ 13 $ 986 $ 13 Mortgage-backed securities - residential 107,611 980 290,258 6,170 397,869 7,150 Municipals, tax exempt 7,354 101 20,112 467 27,466 568 Treasury securities 7,252 93 — — 7,252 93 Total debt securities 122,217 1,174 311,356 6,650 433,573 7,824 Equity securities — — 3,050 149 3,050 149 $ 122,217 $ 1,174 $ 314,406 $ 6,799 $ 436,623 $ 7,973

Loans and Allowance for Loan 28

Loans and Allowance for Loan Losses (Tables)	3 Months Ended
	Mar. 31, 2018
Receivables [Abstract]
Loans Outstanding by Major Lending Classification	Loans outstanding at March 31, 2018 and December 31, 2017, by major lending classification are as follows: March 31, December 31, 2018 2017 Commercial and industrial $ 765,115 $ 715,075 Construction 466,495 448,326 Residential real estate: 1-to-4 family mortgage 491,725 480,989 Residential line of credit 197,740 194,986 Multi-family mortgage 63,295 62,374 Commercial real estate: Owner occupied 499,331 495,872 Non-owner occupied 562,128 551,588 Consumer and other 198,834 217,701 Gross loans 3,244,663 3,166,911 Less: Allowance for loan losses (24,406 ) (24,041 ) Net loans $ 3,220,257 $ 3,142,870
Changes in Accretable Yield on Purchase Credit Impaired Loans	The following table presents changes in the value of the accretable yield for PCI loans for the periods indicated. Purchased Credit Impaired Accretable yield Balance at December 31, 2017 $ (17,682 ) Principal reductions/ pay-offs (1,294 ) Recoveries — Accretion 2,201 Other changes (180 ) Balance at March 31, 2018 $ (16,955 ) Balance at December 31, 2016 $ (2,444 ) Principal reductions/ pay-offs (698 ) Recoveries (23 ) Accretion 1,023 Balance at March 31, 2017 $ (2,142 )
Allowance for Loan Losses by Portfolio Segment and Related Investment in Loans Net of Unearned Interest	Interest revenue, through accretion of the difference between the carrying value of the loans and the expected cash flows, is being recognized on all PCI loans. Accretion of interest income amounting to $2,201 and $1,023 was recognized on purchased credit impaired loans during the three months ended March 31, 2018 and 2017, respectively. This includes both the contractual interest income and the purchase accounting contribution through accretion of the liquidity discount and credit mark for changes in estimated cash flows. The total purchase accounting contribution through accretion for all purchased loans was $1,687 and $1,160 for three months ended March 31, 2018 and 2017, respectively. The following provides the allowance for loan losses by portfolio segment and the related investment in loans net of unearned interest for the three months ended March 31, 2018 and 2017 (in thousands): Commercial and industrial Construction 1-to-4 family residential mortgage Residential line of credit Multi- family residential mortgage Commercial real estate owner occupied Commercial real estate non-owner occupied Consumer and other Total Three Months Ended March 31, 2018 Beginning balance - December 31, 2017 $ 4,461 $ 7,135 $ 3,197 $ 944 $ 434 $ 3,558 $ 2,817 $ 1,495 $ 24,041 Provision for loan losses 202 479 (30 ) 214 15 (567 ) (115 ) 119 317 Recoveries of loans previously charged-off 135 252 15 27 — 23 51 206 709 Loans charged off (220 ) — (60 ) (20 ) — — — (361 ) (661 ) Ending balance - March 31, 2018 $ 4,578 $ 7,866 $ 3,122 $ 1,165 $ 449 $ 3,014 $ 2,753 $ 1,459 $ 24,406 Commercial and industrial Construction 1-to-4 family residential mortgage Residential line of credit Multi- family residential mortgage Commercial real estate owner occupied Commercial real estate non-owner occupied Consumer and other Total Three Months Ended March 31, 2017 Beginning balance - December 31, 2016 $ 5,309 $ 4,940 $ 3,197 $ 1,613 $ 504 $ 3,302 $ 2,019 $ 863 $ 21,747 Provision for loan losses 179 635 (239 ) (155 ) 4 81 (998 ) 236 (257 ) Recoveries of loans previously charged-off 83 29 26 56 — 4 1,639 13 1,850 Loans charged off (169 ) (6 ) (88 ) — — — — (179 ) (442 ) Ending balance - March 31, 2017 $ 5,402 $ 5,598 $ 2,896 $ 1,514 $ 508 $ 3,387 $ 2,660 $ 933 $ 22,898
Allocation of Allowance for Loan Losses by Loan Category Broken Out Between Loans Individually and Collectively Evaluated for Impairment	The following table provides the allocation of the allowance for loan losses by loan category broken out between loans individually evaluated for impairment and loans collectively evaluated for impairment as of March 31, 2018 and December 31, 2017: March 31, 2018 Commercial and industrial Construction 1-to-4 family residential mortgage Residential line of credit Multi- family residential mortgage Commercial real estate owner occupied Commercial real estate non-owner occupied Consumer and other Total Amount of allowance allocated to: Individually evaluated for impairment $ 19 $ — $ 16 $ — $ — $ 95 $ 29 $ — $ 159 Collectively evaluated for impairment 4,559 7,866 3,106 1,165 449 2,919 2,724 1,459 24,247 Acquired with deteriorated credit quality — — — — — — — — — Ending balance - March 31, 2018 $ 4,578 $ 7,866 $ 3,122 $ 1,165 $ 449 $ 3,014 $ 2,753 $ 1,459 $ 24,406 December 31, 2017 Commercial and industrial Construction 1-to-4 family residential mortgage Residential line of credit Multi- family residential mortgage Commercial real estate owner occupied Commercial real estate non-owner occupied Consumer and other Total Amount of allowance allocated to: Individually evaluated for impairment $ 20 $ — $ 18 $ — $ — $ 120 $ 33 $ — $ 191 Collectively evaluated for impairment 4,441 7,135 3,179 944 434 3,438 2,784 1,495 23,850 Acquired with deteriorated credit quality — — — — — — — — — Ending balance - December 31, 2017 $ 4,461 $ 7,135 $ 3,197 $ 944 $ 434 $ 3,558 $ 2,817 $ 1,495 $ 24,041
Amount of Loans by Loan Category Broken Between Loans Individually and Collectively Evaluated for Impairment	The following table provides the amount of loans by loan category broken between loans individually evaluated for impairment and loans collectively evaluated for impairment as of March 31, 2018 and December 31, 2017: March 31, 2018 Commercial and industrial Construction 1-to-4 family residential mortgage Residential line of credit Multi- family residential mortgage Commercial real estate owner occupied Commercial real estate non-owner occupied Consumer and other Total Loans, net of unearned income Individually evaluated for impairment $ 1,385 $ 1,285 $ 1,492 $ — $ 964 $ 2,150 $ 1,713 $ 29 $ 9,018 Collectively evaluated for impairment 761,779 457,785 467,329 197,740 62,313 485,411 542,351 175,185 3,149,893 Acquired with deteriorated credit quality 1,951 7,425 22,904 — 18 11,770 18,064 23,620 85,752 Ending balance - March 31, 2018 $ 765,115 $ 466,495 $ 491,725 $ 197,740 $ 63,295 $ 499,331 $ 562,128 $ 198,834 $ 3,244,663 December 31, 2017 Commercial and industrial Construction 1-to-4 family residential mortgage Residential line of credit Multi- family residential mortgage Commercial real estate owner occupied Commercial real estate non-owner occupied Consumer and other Total Loans, net of unearned income Individually evaluated for impairment $ 1,579 $ 1,289 $ 1,262 $ — $ 978 $ 2,520 $ 1,720 $ 25 $ 9,373 Collectively evaluated for impairment 711,352 439,309 456,229 194,986 61,376 481,390 531,704 192,357 3,068,703 Acquired with deteriorated credit quality 2,144 7,728 23,498 — 20 11,962 18,164 25,319 88,835 Ending balance - December 31, 2017 $ 715,075 $ 448,326 $ 480,989 $ 194,986 $ 62,374 $ 495,872 $ 551,588 $ 217,701 $ 3,166,911
Credit Quality Indicators by Portfolio Class	The following table shows credit quality indicators by portfolio class at March 31, 2018 and December 31, 2017: March 31, 2018 Pass Watch Substandard Total Loans, excluding purchased credit impaired loans Commercial and industrial $ 704,689 $ 54,124 $ 4,351 $ 763,164 Construction 441,718 15,468 1,884 459,070 Residential real estate: 1-to-4 family mortgage 452,858 9,027 6,936 468,821 Residential line of credit 194,887 1,677 1,176 197,740 Multi-family mortgage 62,175 138 964 63,277 Commercial real estate: Owner occupied 457,347 25,962 4,252 487,561 Non-owner occupied 527,134 14,972 1,958 544,064 Consumer and other 172,260 2,379 575 175,214 Total loans, excluding purchased credit impaired loans $ 3,013,068 $ 123,747 $ 22,096 $ 3,158,911 Purchased credit impaired loans Commercial and industrial $ — $ 1,351 $ 600 $ 1,951 Construction — 3,422 4,003 7,425 Residential real estate: 1-to-4 family mortgage — 19,454 3,450 22,904 Residential line of credit — — — — Multi-family mortgage — — 18 18 Commercial real estate: Owner occupied — 4,565 7,205 11,770 Non-owner occupied — 7,517 10,547 18,064 Consumer and other — 18,704 4,916 23,620 Total purchased credit impaired loans $ — $ 55,013 $ 30,739 $ 85,752 Total loans $ 3,013,068 $ 178,760 $ 52,835 $ 3,244,663 December 31, 2017 Pass Watch Substandard Total Loans, excluding purchased credit impaired loans Commercial and industrial $ 657,595 $ 50,946 $ 4,390 $ 712,931 Construction 431,242 7,388 1,968 440,598 Residential real estate: 1-to-4 family mortgage 440,202 9,522 7,767 457,491 Residential line of credit 192,427 1,184 1,375 194,986 Multi-family mortgage 61,234 142 978 62,354 Commercial real estate: Owner occupied 451,140 28,308 4,462 483,910 Non-owner occupied 517,253 14,199 1,972 533,424 Consumer and other 189,081 2,712 589 192,382 Total loans, excluding purchased credit impaired loans $ 2,940,174 $ 114,401 $ 23,501 $ 3,078,076 Purchased credit impaired loans Commercial and industrial $ — $ 1,499 $ 645 $ 2,144 Construction — 3,324 4,404 7,728 Residential real estate: 1-to-4 family mortgage — 20,284 3,214 23,498 Residential line of credit — — — — Multi-family mortgage — — 20 20 Commercial real estate: Owner occupied — 4,631 7,331 11,962 Non-owner occupied — 7,359 10,805 18,164 Consumer and other — 19,751 5,568 25,319 Total purchased credit impaired loans $ — $ 56,848 $ 31,987 $ 88,835 Total loans $ 2,940,174 $ 171,249 $ 55,488 $ 3,166,911
Past Due Loans	Nonperforming loans include loans that are no longer accruing interest (non-accrual loans) and loans past due ninety or more days and still accruing interest. Nonperforming loans and impaired loans are defined differently. Some loans may be included in both categories, whereas other loans may only be included in one category. The following table provides the period-end amounts of loans that are past due thirty to eighty-nine days, past due ninety or more days and still accruing interest, loans not accruing interest, loans current on payments accruing interest and purchased credit impaired loans by category at March 31, 2018 and December 31, 2017: March 31, 2018 30-89 days past due 90 days or more and accruing interest Non-accrual loans Loans current on payments and accruing interest Purchased Credit Impaired loans Total Commercial and industrial $ 1,385 $ 619 $ 910 $ 760,250 $ 1,951 $ 765,115 Construction 250 329 460 458,031 7,425 466,495 Residential real estate: 1-to-4 family mortgage 3,666 1,067 2,009 462,079 22,904 491,725 Residential line of credit 1,013 356 370 196,001 — 197,740 Multi-family mortgage — — — 63,277 18 63,295 Commercial real estate: Owner occupied 202 — 1,903 485,456 11,770 499,331 Non-owner occupied 393 — 1,219 542,452 18,064 562,128 Consumer and other 1,640 318 83 173,173 23,620 198,834 Total $ 8,549 $ 2,689 $ 6,954 $ 3,140,719 $ 85,752 $ 3,244,663 December 31, 2017 30-89 days past due 90 days or more and accruing interest Non-accrual loans Loans current on payments and accruing interest Purchased Credit Impaired loans Total Commercial and industrial $ 5,859 $ 90 $ 533 $ 706,449 $ 2,144 $ 715,075 Construction 1,412 241 300 438,645 7,728 448,326 Residential real estate: 1-to-4 family mortgage 4,678 956 2,548 449,309 23,498 480,989 Residential line of credit 527 134 699 193,626 — 194,986 Multi-family mortgage — — — 62,354 20 62,374 Commercial real estate: Owner occupied 521 358 2,582 480,449 11,962 495,872 Non-owner occupied 121 — 1,371 531,932 18,164 551,588 Consumer and other 1,945 217 68 190,152 25,319 217,701 Total $ 15,063 $ 1,996 $ 8,101 $ 3,052,916 $ 88,835 $ 3,166,911
Impaired Loans Recognized, Segregated by Class	Impaired loans recognized in conformity with ASC 310 at March 31, 2018 and December 31, 2017, segregated by class, were as follows: March 31, 2018 Recorded investment Unpaid principal Related allowance With a related allowance recorded: Commercial and industrial $ 52 $ 52 $ 19 Residential real estate: 1-to-4 family mortgage 191 492 16 Commercial real estate: Owner occupied 585 646 95 Non-owner occupied 142 149 29 Total $ 970 $ 1,339 $ 159 With no related allowance recorded Commercial and industrial $ 1,333 $ 1,539 $ — Construction 1,285 1,313 — Residential real estate: 1-to-4 family mortgage 1,301 1,306 — Multi-family mortgage 964 964 — Commercial real estate: Owner occupied 1,565 2,077 — Non-owner occupied 1,571 2,320 — Consumer and other 29 29 — Total $ 8,048 $ 9,548 $ — Total impaired loans $ 9,018 $ 10,887 $ 159 December 31, 2017 Recorded investment Unpaid principal Related allowance With a related allowance recorded: Commercial and industrial $ 53 $ 53 $ 20 Construction — — — Residential real estate: 1-to-4 family mortgage 194 495 18 Commercial real estate: Owner occupied 844 1,123 120 Non-owner occupied 144 150 33 Consumer and other — — — Total $ 1,235 $ 1,821 $ 191 With no related allowance recorded: Commercial and industrial $ 1,526 $ 1,570 $ — Construction 1,289 1,313 — Residential real estate: 1-to-4 family mortgage 1,068 1,072 — Multi-family mortgage 978 978 — Commercial real estate: Owner occupied 1,676 2,168 — Non-owner occupied 1,576 2,325 — Consumer and other 25 25 — Total $ 8,138 $ 9,451 $ — Total impaired loans $ 9,373 $ 11,272 $ 191 Average recorded investment and interest income on a cash basis recognized during the three months ended March 31, 2018 and 2017 on impaired loans, segregated by class, were as follows: Three Months Ended March 31, 2018 Average recorded investment Interest income recognized (cash basis) With a related allowance recorded: Commercial and industrial $ 53 $ 1 Construction — — Residential real estate: 1-to-4 family mortgage 193 2 Residential line of credit — — Multi-family mortgage — — Commercial real estate: Owner occupied 715 6 Non-owner occupied 143 2 Consumer and other — — Total $ 1,104 $ 11 With no related allowance recorded: Commercial and industrial $ 1,430 $ 16 Construction 1,287 30 Residential real estate: 1-to-4 family mortgage 1,185 13 Residential line of credit — — Multi-family mortgage 971 12 Commercial real estate: Owner occupied 1,621 32 Non-owner occupied 1,574 7 Consumer and other 27 — Total $ 8,095 $ 110 Total impaired loans $ 9,199 $ 121 March 31, 2017 With a related allowance recorded: Commercial and industrial $ 791 $ 5 Construction — — Residential real estate: 1-to-4 family mortgage 101 — Residential line of credit — — Multi-family mortgage — — Commercial real estate: Owner occupied 629 12 Non-owner occupied 835 — Consumer and other 1 — Total $ 2,357 $ 17 With no related allowance recorded: Commercial and industrial $ 584 $ 9 Construction 1,496 5 Residential real estate: 1-to-4 family mortgage 2,243 17 Residential line of credit 156 — Multi-family mortgage 1,021 11 Commercial real estate: Owner occupied 1,977 38 Non-owner occupied 1,325 — Consumer and other 26 1 Total $ 8,828 $ 81 Total impaired loans $ 11,185 $ 98
Financial Effect of TDRs	The following tables present the financial effect of TDRs recorded during the three months ended March 31, 2018 and 2017: Three Months Ended March 31, 2018 Number of loans Pre-modification outstanding recorded investment Post-modification outstanding recorded investment Charge offs and specific reserves Residential real estate: 1-to-4 family mortgage 1 $ 249 $ 249 $ — Consumer and other 1 5 5 — Total 2 $ 254 $ 254 $ — Three Months Ended March 31, 2017 Number of loans Pre-modification outstanding recorded investment Post-modification outstanding recorded investment Charge offs and specific reserves Residential real estate: 1-to-4 family mortgage 1 $ 5 $ 5 $ — Commercial real estate: Owner occupied 1 377 377 — Non-owner occupied 2 711 711 — Total 4 $ 1,093 $ 1,093 $ —

Other Real Estate Owned (Tables

Other Real Estate Owned (Tables)	3 Months Ended
	Mar. 31, 2018
Real Estate [Abstract]
Summary of Other Real Estate Owned	The following table summarizes other real estate owned for the three months ended March 31, 2018 and 2017: Three Months Ended March 31, 2018 2017 Balance at beginning of period $ 16,442 $ 7,403 Transfers from loans 630 888 Properties sold (1,432 ) (2,228 ) (Loss) gain on sale of other real estate owned (43 ) 871 Transferred to loans (120 ) — Write-downs and partial liquidations (143 ) (123 ) Balance at end of period $ 15,334 $ 6,811

Mortgage Servicing Rights (Tabl

Mortgage Servicing Rights (Tables)	3 Months Ended
	Mar. 31, 2018
Transfers And Servicing Of Financial Assets [Abstract]
Schedule of Changes in Mortgage Servicing Rights	Changes in the Company’s mortgage servicing rights were as follows for the three months ended March 31, 2018 and 2017: Three Months Ended March 31, 2018 2017 Carrying value prior to policy change $ 76,107 $ 32,070 Fair value impact of change in accounting policy — 1,011 Carrying value at beginning of period 76,107 33,081 Capitalization 13,510 15,013 Change in fair value: Due to pay-offs/pay-downs (3,060 ) (265 ) Due to change in valuation inputs or assumptions 6,603 (236 ) Carrying value at March 31 $ 93,160 $ 47,593
Schedule of Servicing Income and Expense Included in Mortgage Banking Income	The following table summarizes servicing income and expense included in mortgage banking income and other noninterest expense within the Mortgage Segment operating results, respectively, for the three months ended March 31, 2018 and 2017, respectively: Three Months Ended March 31, 2018 2017 Servicing income: Servicing income $ 4,793 $ 2,748 Change in fair value of mortgage servicing rights 3,543 (501 ) Change in fair value of mortgage servicing rights hedging instruments (5,256 ) — Gross servicing income 3,080 2,247 Gross direct servicing expenses 1,795 1,020 Net servicing income $ 1,285 $ 1,227
Schedule of Data and Key Economic Assumptions Related to Mortgage Servicing Rights	Data and key economic assumptions related to the Company’s mortgage servicing rights as of March 31, 2018 and December 31, 2017 are as follows: March 31, December 31, 2018 2017 Unpaid principal balance $ 7,423,932 $ 6,529,431 Weighted-average prepayment speed (CPR) 7.69 % 8.90 % Estimated impact on fair value of a 10% increase (2,997 ) (3,026 ) Estimated impact on fair value of a 20% increase (5,780 ) (5,855 ) Discount rate 10.01 % 9.75 % Estimated impact on fair value of a 100 bp increase (3,829 ) (3,052 ) Estimated impact on fair value of a 200 bp increase (7,379 ) (5,867 ) Weighted-average coupon interest rate 3.98 % 3.94 % Weighted-average servicing fee (basis points) 28 28 Weighted-average remaining maturity (in months) 322 335

Income Taxes (Tables)

Income Taxes (Tables)	3 Months Ended
	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Schedule of Allocation of Federal and State Income Taxes between Current and Deferred Portions	Allocation of federal and state income taxes between current and deferred portions is as follows: For the three months ended March 31, 2018 2017 Current $ — $ — Deferred 5,482 5,425 Total $ 5,482 $ 5,425
Schedule of Differences in Federal Income Tax Expense and State Tax Expense from Statutory Federal and State Rates	Federal income tax expense for the three months ended March 31, 2018 and 2017 differs from the statutory federal rates of 21% and 35%, respectively, due to the following: For the three months ended March 31, 2018 2017 Federal taxes calculated at statutory rate $ 5,300 21.0 % $ 5,305 35.0 % Increase (decrease) resulting from: State taxes, net of federal benefit 1,143 4.5 % 610 4.0 % Benefit of equity based compensation (736 ) -3.0 % (195 ) -1.3 % Municipal interest income (201 ) -0.8 % (366 ) -2.4 % Bank owned life insurance (12 ) 0.0 % (21 ) -0.2 % Other (12 ) 0.0 % 92 0.6 % Income tax expense, as reported $ 5,482 21.7 % $ 5,425 35.7 %
Schedule of Net Deferred Tax liability	The components of the net deferred tax liability at March 31, 2018 and December 31, 2017, are as follows: March 31, December 31, 2018 2017 Deferred tax assets: Allowance for loan losses $ 6,359 $ 6,264 Amortization of core deposit intangible 832 759 Deferred compensation 3,711 6,158 Unrealized loss on available-for-sale debt securities 3,830 988 Other 5,501 3,599 Subtotal 20,233 17,768 Deferred tax liabilities: FHLB stock dividends (550 ) (550 ) Depreciation (4,344 ) (4,115 ) Cash flow hedges (866 ) — Mortgage servicing rights (24,274 ) (19,830 ) Other (5,564 ) (5,131 ) Subtotal (35,598 ) (29,626 ) Net deferred tax liability $ (15,365 ) $ (11,858 )

Commitments and Contingencies (

Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 31, 2018
Commitments And Contingencies Disclosure [Abstract]
Summary of Financial instruments with Off-Balance Sheet Credit Risk	Commitments may expire without being used. Off-balance sheet risk to credit loss exists up to the face amount of these instruments, although material losses are not anticipated. The same credit policies are used to make such commitments as are used for loans, including obtaining collateral at exercise of the commitment. March 31, December 31, 2018 2017 Commitments to extend credit, excluding interest rate lock commitments $ 959,271 $ 977,276 Letters of credit 22,214 22,882 Balance at end of period $ 981,485 $ 1,000,158
Summary of Allowance for Loan Repurchases or Indemnifications	The following table summarizes the activity in the repurchase reserve: For the three months ended March 31, 2018 2017 Balance at beginning of period $ 3,386 $ 2,659 Provision for loan repurchases or indemnifications 186 183 Recoveries on previous losses (58 ) — Balance at end of period $ 3,514 $ 2,842

Derivatives (Tables)

Derivatives (Tables)	3 Months Ended
	Mar. 31, 2018
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Schedule of Derivative Financial Instruments	The following tables provide details on the Company’s derivative financial instruments as of the dates presented: March 31, 2018 Notional Amount Asset Liability Not designated as hedging: Interest rate contracts $ 175,726 $ 2,360 $ 2,360 Forward commitments 919,571 — 1,295 Interest rate-lock commitments 692,977 10,179 — Futures contracts 243,000 1,180 — Option contracts 22,000 148 — Total $ 2,053,274 $ 13,867 $ 3,655 December 31, 2017 Notional Amount Asset Liability Not designated as hedging: Interest rate contracts $ 146,754 $ 1,146 $ 1,146 Forward commitments 870,574 — 553 Interest rate-lock commitments 504,156 6,768 — Futures contracts 283,000 315 — Option contracts 6,000 29 — Total $ 1,810,484 $ 8,258 $ 1,699 March 31, 2018 Notional Amount Asset Liability Designated as hedging: Interest rate swaps $ 30,000 $ 1,037 $ — Total $ 30,000 $ 1,037 $ — December 31, 2017 Notional Amount Asset Liability Designated as hedging: Interest rate swaps $ 130,000 $ 1,432 $ — Total $ 130,000 $ 1,432 $ —
Schedule of Gains (Losses) Included in the Consolidated Statements of Income Related to Derivative Financial Instruments	Gains (losses) included in the Consolidated Statements of Income related to the Company’s derivative financial instruments were as follows: Three Months Ended March 31, 2018 2017 Not designated as hedging instruments (included in mortgage banking income): Interest rate lock commitments $ 3,411 $ 2,942 Forward commitments 5,318 (3,320 ) Futures contracts (2,447 ) — Options contracts 43 — Total $ 6,325 $ (378 ) Three Months Ended March 31, 2018 2017 Designated as hedging: Amount of gain reclassified from other comprehensive income and recognized in interest expense on long-term debt $ (32) —
Schedule of Other Comprehensive Income (Loss), Net of Tax, for Derivative Instruments Designated as Cash Flow Hedges	The following table discloses the amount included in other comprehensive income (loss), net of tax, for derivative instruments designated as cash flow hedges for the periods presented: Three Months Ended March 31, 2018 2017 Designated as hedging: Amount of gain recognized in other comprehensive income, net of tax $ 1,273 —

Fair Value of Financial Instr34

Fair Value of Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Estimated Fair Values and Carrying Values of Financial Instruments	The following table contains the estimated fair values and the related carrying values of the Company's financial instruments. Items which are not financial instruments are not included. Due to the adoption of ASU 2016-01 as of January 1, 2018, the fair value as presented below is measured using the exit price notion in the periods after adoption and may not be comparable with prior periods presented as a result of the change in methodology. Fair Value March 31, 2018 Carrying amount Level 1 Level 2 Level 3 Total Financial assets: Cash and cash equivalents $ 73,700 $ 73,700 $ — $ — $ 73,700 Investment securities 597,347 — 597,347 — 597,347 Federal Home Loan Bank Stock 11,810 N/A N/A N/A N/A Loans, net 3,220,257 — — 3,213,659 3,213,659 Loans held for sale 414,518 — 414,518 — 414,518 Interest receivable 13,920 — 13,920 — 13,920 Mortgage servicing rights 93,160 — — 93,160 93,160 Derivatives 14,904 — 14,904 — 14,904 Financial liabilities: Deposits: Without stated maturities $ 3,059,142 $ 3,059,142 $ — $ — $ 3,059,142 With stated maturities 707,009 — 706,585 — 706,585 Securities sold under agreement to repurchase 14,724 14,724 — — 14,724 Short term borrowings 138,707 138,707 — — 138,707 Interest payable 1,857 526 1,331 — 1,857 Long-term debt 139,586 — 138,456 — 138,456 Derivatives 3,655 — 3,655 — 3,655 Fair Value December 31, 2017 Carrying amount Level 1 Level 2 Level 3 Total Financial assets: Cash and cash equivalents $ 119,751 $ 119,751 $ — $ — $ 119,751 Investment securities 543,992 — 540,388 3,604 543,992 Federal Home Loan Bank Stock 11,412 N/A N/A N/A N/A Loans, net 3,142,870 — 3,064,373 77,027 3,141,400 Loans held for sale 526,185 — 526,185 — 526,185 Interest receivable 13,069 — 13,069 — 13,069 Mortgage servicing rights, net 76,107 — — 76,107 76,107 Derivatives 9,690 — 9,690 — 9,690 Financial liabilities: Deposits: Without stated maturities $ 2,976,066 $ 2,976,066 $ — $ — $ 2,976,066 With stated maturities 688,329 — 682,403 — 682,403 Securities sold under agreement to repurchase 14,293 14,293 — — 14,293 Short term borrowings 190,000 190,000 — — 190,000 Interest payable 1,504 575 929 — 1,504 Long-term debt 143,302 — 149,135 — 149,135 Derivatives 1,699 — 1,699 — 1,699
Balances and Levels of Assets Measured at Fair Value on Recurring Basis	The balances and levels of the assets measured at fair value on a recurring basis at March 31, 2018 are presented in the following tables: At March 31, 2018 Quoted prices in active markets for identical assets (liabilities) (level 1) Significant other observable inputs (level 2) Significant unobservable inputs (level 3) Total Recurring valuations: Financial assets: Investment securities: U.S. government agency securities $ — $ 982 $ — $ 982 Mortgage-backed securities — 472,930 — 472,930 Municipals, tax-exempt — 113,158 — 113,158 Treasury securities — 7,178 — 7,178 Equity securities — 3,099 — 3,099 Total $ — $ 597,347 $ — $ 597,347 Loans held for sale — 414,518 — 414,518 Mortgage servicing rights — — 93,160 93,160 Derivatives — 14,904 — 14,904 Financial Liabilities: Derivatives $ — $ 3,655 $ — $ 3,655 The balances and levels of the assets measured at fair value on a recurring basis at December 31, 2017 are presented in the following tables: At December 31, 2017 Quoted prices in active markets for identical assets (liabilities) (level 1) Significant other observable inputs (level 2) Significant unobservable inputs (level 3) Total Recurring valuations: Financial assets: Available-for-sale securities: U.S. government agency securities $ — $ 986 $ — $ 986 Mortgage-backed securities — 418,781 — 418,781 Municipals, tax-exempt — 109,251 — 109,251 Treasury securities — 7,252 — 7,252 Equity securities — 4,118 3,604 7,722 Total $ — $ 540,388 $ 3,604 $ 543,992 Loans held for sale — 526,185 — 526,185 Mortgage servicing rights — — 76,107 76,107 Derivatives — 9,690 — 9,690 Financial Liabilities: Derivatives $ — $ 1,699 $ — $ 1,699
Balances and Levels of Assets Measured at Fair Value on Non-recurring Basis	The balances and levels of the assets measured at fair value on a non-recurring basis at March 31, 2018 are presented in the following tables: At March 31, 2018 Quoted prices in active markets for identical assets (liabilities) (level 1) Significant other observable inputs (level 2) Significant unobservable inputs (level 3) Total Non-recurring valuations: Financial assets: Other real estate owned $ — $ — $ 800 $ 800 Impaired loans: Commercial and industrial — — — — Construction Residential real estate: 1-4 family mortgage — — 144 144 Commercial real estate: — — — — Owner occupied Non-owner occupied — — — — Consumer and other — — — — Total $ — $ — $ 144 $ 144 The balances and levels of the assets measured at fair value on a non-recurring basis at December 31, 2017 are presented in the following tables: At December 31, 2017 Quoted prices in active markets for identical assets (liabilities) (level 1) Significant other observable inputs (level 2) Significant unobservable inputs (level 3) Total Non-recurring valuations: Financial assets: Other real estate owned $ — $ — $ 13,174 $ 13,174 Impaired Loans: Commercial and industrial — — 1,971 1,971 Construction — — 4,211 4,211 Residential real estate: 1-4 family mortgage — — 21,902 21,902 Commercial real estate: Owner occupied — — 10,030 10,030 Non-owner occupied — — 13,593 13,593 Consumer and other — — 25,320 25,320 Total $ — $ — $ 77,027 $ 77,027
Summary of Changes in Fair Value on Available-for-Sale Securities Measured at Fair Value on Recurring Basis using Significant Unobservable Inputs or Level 3 Inputs	The following table summarizes changes in fair value on available-for-sale securities measured at fair value on a recurring basis using significant unobservable inputs, or Level 3 inputs, during the three months ended March 31, 2018 and 2017. Investment securities Three Months Ended March 31, 2018 2017 Balance at beginning of period $ 3,604 $ 4,549 Reclassification of equity securities without a readily determinable fair value to other assets (1) (3,604 ) — Balance at end of period $ — $ 4,549 (1) See Note 1, “Basis of Presentation” in the Notes to the consolidated financial statements for additional details regarding the adoption of ASU 2016-01, Recognition and Measurement of Financial Assets and Liabilities.
Information About Significant Unobservable Inputs (Level 3) Used in Valuation of Assets Measured at Fair Value on Nonrecurring Basis	The following table presents information as of March 31, 2018 about significant unobservable inputs (Level 3) used in the valuation of assets measured at fair value on a nonrecurring basis: Financial instrument Fair Valuation technique Significant Unobservable inputs Range of inputs Impaired loans $ 144 Valuation of collateral Discount for comparable sales 0%-30% Other real estate owned $ 800 Appraised value of property less costs to sell Discount for costs to sell 0%-15% The following table presents information as of December 31, 2017 about significant unobservable inputs (Level 3) used in the valuation of assets measured at fair value on a nonrecurring basis: Financial instrument Fair Valuation technique Significant Unobservable inputs Range of inputs Impaired loans $ 77,027 Valuation of collateral Discount for comparable sales 0%-30% Other real estate owned $ 13,174 Appraised value of property less costs to sell Discount for costs to sell 0%-15%
Differences between Fair Value and Principal Balance for Loans Held for Sale Measured at Fair Value	The following table summarizes the differences between the fair value and the principal balance for loans held for sale measured at fair value as of March 31, 2018 and December 31, 2017: March 31, 2018 Aggregate fair value Aggregate Unpaid Principal Balance Difference Mortgage loans held for sale measured at fair value $ 414,017 $ 401,087 $ 12,930 Past due loans of 90 days or more — — — Nonaccrual loans 501 501 — December 31, 2017 Mortgage loans held for sale measured at fair value $ 482,089 $ 467,039 $ 15,050 Past due loans of 90 days or more 320 320 — Nonaccrual loans 741 741 —

Segment Reporting (Tables)

Segment Reporting (Tables)	3 Months Ended
	Mar. 31, 2018
Segment Reporting [Abstract]
Schedule of Segment Financial Information	The following tables provides segment financial information for the three months ended March 31, 2018 and 2017 follows: Three Months Ended March 31, 2018 Banking Mortgage Consolidated Net interest income $ 48,771 $ (342 ) $ 48,429 Provision for loan loss 317 — 317 Mortgage banking income 6,108 22,076 28,184 Change in fair value of mortgage servicing rights (1) — (1,713 ) (1,713 ) Other noninterest income 6,804 — 6,804 Depreciation 978 128 1,106 Amortization of intangibles 853 — 853 Other noninterest mortgage banking expense 5,097 18,782 23,879 Other noninterest expense (2) 30,313 — 30,313 Income before income taxes 24,125 1,111 25,236 Income tax expense 5,482 Net income 19,754 Total assets $ 4,220,543 $ 504,873 $ 4,725,416 Goodwill 137,090 100 137,190 (1) Included in mortgage banking income, net of hedging gains/losses. (2) Included $1,193 in merger and conversion expenses related to the merger with the Clayton Banks. Three Months Ended March 31, 2017 Banking Mortgage Consolidated Net interest income $ 29,856 $ 395 $ 30,251 Provision for loan loss (257 ) — (257 ) Mortgage banking income 5,666 19,915 25,581 Net, change in fair value of mortgage servicing rights (1) — (501 ) (501 ) Other noninterest income 6,007 — 6,007 Depreciation and amortization 864 138 1,002 Amortization of intangibles 392 — 392 Other noninterest mortgage banking expense 4,836 17,532 22,368 Other noninterest expense (2) 22,655 — 22,655 Income before income taxes 13,039 2,139 15,178 Income tax expense 5,425 Net income 9,753 Total assets $ 2,705,118 $ 461,341 $ 3,166,459 Goodwill 46,767 100 46,867

Minimum Capital Requirements (T

Minimum Capital Requirements (Tables)	3 Months Ended
	Mar. 31, 2018
Banking And Thrift [Abstract]
Schedule of Actual and Required Capital Amounts and Ratios	Actual and required capital amounts and ratios are presented below at period-end: Actual For capital adequacy purposes Minimum Capital adequacy with capital buffer To be well capitalized under prompt corrective action provisions Amount Ratio Amount Ratio Amount Ratio Amount Ratio March 31, 2018 Total Capital (to risk-weighted assets) FB Financial Corporation $ 506,921 12.3 % $ 328,636 8.0 % $ 405,865 9.9 % N/A N/A FirstBank 476,454 11.6 % 328,589 8.0 % 405,807 9.9 % $ 410,736 10.0 % Tier 1 Capital (to risk-weighted assets) FB Financial Corporation $ 482,515 11.8 % $ 246,391 6.0 % $ 323,593 7.9 % N/A N/A FirstBank 452,048 11.0 % 246,348 6.0 % 323,537 7.9 % $ 246,348 6.0 % Tier 1 Capital (to average assets) FB Financial Corporation $ 482,515 10.7 % $ 180,043 4.0 % N/A N/A N/A N/A FirstBank 452,048 10.0 % 180,819 4.0 % N/A N/A $ 226,024 5.0 % Common Equity Tier 1 Capital (to risk-weighted assets) FB Financial Corporation $ 452,515 11.0 % $ 184,784 4.5 % $ 261,982 6.4 % N/A N/A FirstBank 452,048 11.0 % 184,761 4.5 % 261,950 6.4 % $ 266,877 6.5 % Actual For capital adequacy purposes Minimum Capital adequacy with capital buffer To be well capitalized under prompt corrective action provisions Amount Ratio Amount Ratio Amount Ratio Amount Ratio December 31, 2017 Total Capital (to risk-weighted assets) FB Financial Corporation $ 496,422 12.0 % $ 330,672 8.0 % $ 382,340 9.3 % N/A N/A FirstBank 466,102 11.3 % 329,984 8.0 % 381,544 9.3 % $ 412,480 10.0 % Tier 1 Capital (to risk-weighted assets) FB Financial Corporation $ 472,381 11.4 % $ 247,969 6.0 % $ 299,629 7.3 % N/A N/A FirstBank 442,061 10.7 % 247,422 6.0 % 298,968 7.3 % $ 247,422 6.0 % Tier 1 Capital (to average assets) FB Financial Corporation $ 472,381 10.5 % $ 180,643 4.0 % N/A N/A N/A N/A FirstBank 442,061 9.8 % 180,987 4.0 % N/A N/A $ 226,234 5.0 % Common Equity Tier 1 Capital (to risk-weighted assets) FB Financial Corporation $ 442,381 10.7 % $ 185,874 4.5 % $ 237,506 5.8 % N/A N/A FirstBank 442,061 10.7 % 185,567 4.5 % 237,113 5.8 % $ 268,041 6.5 %

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Summary of Vested and Unvested Restricted Stock Units Outstanding	The following table summarizes information about vested and unvested restricted stock units, excluding cash-settled EBI units discussed above, outstanding at March 31, 2018 and 2017: March 31, 2018 2017 Restricted Stock Units Outstanding Weighted Average Grant Date Fair Value Restricted Stock Units Outstanding Weighted Average Grant Date Fair Value Balance at beginning of period (unvested) 1,214,325 $ 19.97 1,200,848 19.00 Grants 105,429 39.90 73,801 33.48 Released and distributed (vested) (170,160 ) 21.24 (70,687 ) 19.00 Forfeited/expired (5,556 ) 19.00 (544 ) 19.00 Balance at end of period (unvested) 1,144,038 $ 21.11 1,203,418 19.15

Related party transactions (Tab

Related party transactions (Tables)	3 Months Ended
	Mar. 31, 2018
Related Party Transactions [Abstract]
Schedule of Loans Analysis to Executive Officers, Certain Management, Bank Directors and Their Affiliates	An analysis of loans to executive officers, certain management, and directors of the Bank and their affiliates follows: Loans outstanding at January 1, 2018 $ 21,012 New loans and advances 1,611 Repayments (1,537 ) Loans outstanding at March 31, 2018 $ 21,086

Basis of Presentation - Additio

Basis of Presentation - Additional Information (Details)	Apr. 23, 2018USD ($)$ / shares	Jan. 01, 2018USD ($)	Mar. 31, 2018USD ($)Branch	Dec. 31, 2017USD ($)
ASC 860-50-35, Transfers and Servicing
Class Of Stock [Line Items]
Percent of remaining principal allowed to buy back under GNMA optional repurchase programs			100.00%
ASU 2014-09
Class Of Stock [Line Items]
Adjustment to retained earnings		$ 0
ASU 2016-01
Class Of Stock [Line Items]
Adjustment to retained earnings			$ 109,000
GNMA
Class Of Stock [Line Items]
Residential mortgage loans transferred by bank			0	$ 43,035,000
Delinquent GNMA loans			$ 45,933,000
Subsequent Event
Class Of Stock [Line Items]
Quarterly dividends declared, per share | $ / shares	$ 0.06
Dividends , Date of record	Apr. 30, 2018
Dividends, Date to be paid	May 15, 2018
Dividends, Date declared	Apr. 23, 2018
Dividends declared, Total	$ 1,841,000
FirstBank
Class Of Stock [Line Items]
Number of bank branches | Branch			56

Basis of Presentation - Schedul

Basis of Presentation - Schedule of Basic and Diluted Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Basic earnings per share calculation:
Net income	$ 19,754	$ 9,753
Weighted-average basic shares outstanding	30,613,284	24,138,437
Basic earnings per share	$ 0.65	$ 0.40
Diluted earnings per share:
Net income	$ 19,754	$ 9,753
Weighted-average basic shares outstanding	30,613,284	24,138,437
Average diluted common shares outstanding	808,546	472,554
Weighted-average diluted shares outstanding	31,421,830	24,610,991
Diluted earnings per share	$ 0.63	$ 0.40

Mergers and acquisitions - Addi

Mergers and acquisitions - Additional Information (Details)	Jul. 31, 2017USD ($)		Feb. 08, 2017USD ($)shares	Mar. 31, 2018USD ($)	Mar. 31, 2017USD ($)	Dec. 31, 2017USD ($)	Jul. 30, 2017BankingOffice
Business Acquisition [Line Items]
Goodwill				$ 137,190,000	$ 46,867,000	$ 137,190,000
Merger and conversion				1,193,000	487,000
Business combination, deferred taxes				$ 20,233,000		$ 17,768,000
Clayton Banks
Business Acquisition [Line Items]
Business acquisition, date of acquisition agreement				Feb. 8, 2017
Acquisition purchase price	$ 236,484,000		$ 236,484,000
Business acquisition, shares issued | shares			1,521,200
Cash purchase price	184,200,000	[1]	$ 184,200,000
Number of banking offices | BankingOffice							18
Goodwill	90,323,000
Merger and conversion				$ 1,193,000	$ 487,000
Business combination, deferred taxes	$ 0
Number of years of deductibility for income tax of the goodwill and core deposit intangible	15 years
[1]	Amount was deposited into an interest-bearing account with the Bank in the name of the Seller as of July 31, 2017

Mergers and acquisitions - Sche

Mergers and acquisitions - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Details) - Clayton Banks $ in Thousands	Jul. 31, 2017USD ($)
Assets
Cash and cash equivalents	$ 49,059
Investment securities	59,493
FHLB stock	3,409
Loans	1,059,728
Premises and equipment	18,866
Other real estate owned	6,888
Intangibles, net	12,334
Other assets	5,978
Total assets	1,215,755
Liabilities
Interest-bearing deposits	670,054
Non-interest bearing deposits	309,464
Borrowings	84,831
Accrued expenses and other liabilities	5,245
Total liabilities	1,069,594
Net assets acquired	$ 146,161

Mergers and acquisitions - Sc43

Mergers and acquisitions - Schedule of Consideration Paid and Allocation of Purchase Price to Net Assets Acquired (Details) - USD ($) $ / shares in Units, $ in Thousands	Jul. 31, 2017		Feb. 08, 2017	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Preliminary allocation of consideration paid:
Goodwill				$ 137,190	$ 137,190	$ 46,867
Total consideration paid	$ 236,484
Clayton Banks
Equity consideration
Common stock issued			1,521,200
Price per share as of July 31, 2017	$ 34.37
Total equity consideration	$ 52,284
Cash consideration	184,200	[1]	$ 184,200
Total consideration paid	236,484		$ 236,484
Preliminary allocation of consideration paid:
Fair value of net assets acquired including identifiable intangible assets	146,161
Goodwill	$ 90,323
Clayton Banks | Common Stock
Equity consideration
Common stock issued	1,521,200
[1]	Amount was deposited into an interest-bearing account with the Bank in the name of the Seller as of July 31, 2017

Mergers and acquisitions - Busi

Mergers and acquisitions - Business Acquisition, Pro Forma Information (Details) - Clayton Banks $ in Thousands	3 Months Ended
	Mar. 31, 2017USD ($)
Business Acquisition [Line Items]
Net interest income	$ 46,687
Total revenues	79,281
Net income	$ 16,728

Investment Securities - Summary

Investment Securities - Summary of Amortized Cost of Securities and Fair Values (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Schedule Of Available For Sale Securities [Line Items]
Amortized cost		$ 548,898
Gross unrealized gains		3,067
Gross unrealized losses		(7,973)
Available-for-sale securities, at fair value		543,992
Debt Securities
Schedule Of Available For Sale Securities [Line Items]
Amortized cost	$ 608,754	541,028
Gross unrealized gains	1,819	3,066
Gross unrealized losses	(16,325)	(7,824)
Available-for-sale securities, at fair value	594,248	536,270
Debt Securities | U.S. Government Agency Securities
Schedule Of Available For Sale Securities [Line Items]
Amortized cost	999	999
Gross unrealized losses	(17)	(13)
Available-for-sale securities, at fair value	982	986
Debt Securities | Mortgage-backed Securities - Residential
Schedule Of Available For Sale Securities [Line Items]
Amortized cost	486,907	425,557
Gross unrealized gains	237	374
Gross unrealized losses	(14,214)	(7,150)
Available-for-sale securities, at fair value	472,930	418,781
Debt Securities | Municipals, Tax Exempt
Schedule Of Available For Sale Securities [Line Items]
Amortized cost	113,492	107,127
Gross unrealized gains	1,582	2,692
Gross unrealized losses	(1,916)	(568)
Available-for-sale securities, at fair value	113,158	109,251
Debt Securities | Treasury Securities
Schedule Of Available For Sale Securities [Line Items]
Amortized cost	7,356	7,345
Gross unrealized losses	(178)	(93)
Available-for-sale securities, at fair value	$ 7,178	7,252
Equity and Other Securities
Schedule Of Available For Sale Securities [Line Items]
Amortized cost		7,870
Gross unrealized gains		1
Gross unrealized losses		(149)
Available-for-sale securities, at fair value		$ 7,722

Investment Securities - Additio

Investment Securities - Additional Information (Details)	Jan. 01, 2018USD ($)	Mar. 31, 2018USD ($)security	Mar. 31, 2017USD ($)	Dec. 31, 2017USD ($)security
Schedule Of Available For Sale Securities [Line Items]
Equity securities, at fair value		$ 3,099,000		$ 7,722,000
Loss on changes in fair value of securities		(38,000)
Securities pledged, carrying amount		$ 427,995,000		$ 337,604,000
Recognized gains on early call of available-for-sale securities			$ 1,000
Number of securities in securities portfolio | security		307		294
Number of securities in securities portfolio, unrealized loss position | security		171		124
Other-than-temporary impairment recorded by the company		$ 0	$ 0
Trade date securities payable		$ 3,912,000
ASU 2016-01
Schedule Of Available For Sale Securities [Line Items]
Other assets reclassified from other securities	$ 3,604,000
Other securities reclassified to other assets	$ 3,604,000

Investment Securities - Schedul

Investment Securities - Schedule of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Schedule Of Available For Sale Securities [Line Items]
Amortized cost, Due in one year or less	$ 5,715	$ 905
Amortized cost, Due in one to five years	24,165	28,332
Amortized cost, Due in five to ten years	19,817	19,218
Amortized cost, Due in over ten years	72,150	67,016
Amortized cost, Total	121,847	115,471
Total debt securities, Amortized cost	608,754	541,028
Fair value, Due in one year or less	5,841	925
Fair value, Due in one to five years	24,396	28,878
Fair value, Due in five to ten years	19,960	19,588
Fair value, Due in over ten years	71,121	68,098
Fair value, Total	121,318	117,489
Available-for-sale debt securities, at fair value	594,248	536,270
Mortgage-backed Securities - Residential
Schedule Of Available For Sale Securities [Line Items]
Total debt securities, Amortized cost	486,907	425,557
Available-for-sale debt securities, at fair value	$ 472,930	$ 418,781

Investment Securities - Summa48

Investment Securities - Summary of Sales and Impairment of Available-for-Sale Securities (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)
Available For Sale Securities Gross Realized Gain Loss [Abstract]
Proceeds from sales	$ 221
Gross realized losses	$ 9

Investment Securities - Sched49

Investment Securities - Schedule of Gross Unrealized Losses (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Schedule Of Available For Sale Securities [Line Items]
Fair Value, Less than 12 months		$ 122,217
Unrealized Loss, Less than 12 months		1,174
Fair Value, 12 months or more		314,406
Unrealized Loss, 12 months or more		6,799
Fair Value, Total		436,623
Unrealized Losses, Total		7,973
Debt Securities
Schedule Of Available For Sale Securities [Line Items]
Fair Value, Less than 12 months	$ 201,052	122,217
Unrealized Loss, Less than 12 months	4,176	1,174
Fair Value, 12 months or more	294,453	311,356
Unrealized Loss, 12 months or more	12,149	6,650
Fair Value, Total	495,505	433,573
Unrealized Losses, Total	16,325	7,824
Debt Securities | U.S. Government Agency Securities
Schedule Of Available For Sale Securities [Line Items]
Fair Value, 12 months or more	982	986
Unrealized Loss, 12 months or more	17	13
Fair Value, Total	982	986
Unrealized Losses, Total	17	13
Debt Securities | Mortgage-backed Securities - Residential
Schedule Of Available For Sale Securities [Line Items]
Fair Value, Less than 12 months	163,771	107,611
Unrealized Loss, Less than 12 months	3,236	980
Fair Value, 12 months or more	274,285	290,258
Unrealized Loss, 12 months or more	10,978	6,170
Fair Value, Total	438,056	397,869
Unrealized Losses, Total	14,214	7,150
Debt Securities | Municipals, Tax Exempt
Schedule Of Available For Sale Securities [Line Items]
Fair Value, Less than 12 months	30,104	7,354
Unrealized Loss, Less than 12 months	762	101
Fair Value, 12 months or more	19,186	20,112
Unrealized Loss, 12 months or more	1,154	467
Fair Value, Total	49,290	27,466
Unrealized Losses, Total	1,916	568
Debt Securities | Treasury Securities
Schedule Of Available For Sale Securities [Line Items]
Fair Value, Less than 12 months	7,177	7,252
Unrealized Loss, Less than 12 months	178	93
Fair Value, Total	7,177	7,252
Unrealized Losses, Total	$ 178	93
Equity Securities
Schedule Of Available For Sale Securities [Line Items]
Fair Value, 12 months or more		3,050
Unrealized Loss, 12 months or more		149
Fair Value, Total		3,050
Unrealized Losses, Total		$ 149

Loans and Allowance for Loan 50

Loans and Allowance for Loan Losses - Loans Outstanding by Major Lending Classification (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans	$ 3,244,663	$ 3,166,911
Less: Allowance for loan losses	(24,406)	(24,041)	$ (22,898)	$ (21,747)
Net loans	3,220,257	3,142,870
Commercial and Industrial
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans	765,115	715,075
Less: Allowance for loan losses	(4,578)	(4,461)	(5,402)	(5,309)
Construction
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans	466,495	448,326
Less: Allowance for loan losses	(7,866)	(7,135)	(5,598)	(4,940)
Residential Real Estate | 1-to-4 Family Mortgage
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans	491,725	480,989
Less: Allowance for loan losses	(3,122)	(3,197)	(2,896)	(3,197)
Residential Real Estate | Residential Line of Credit
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans	197,740	194,986
Less: Allowance for loan losses	(1,165)	(944)	(1,514)	(1,613)
Residential Real Estate | Multi-Family Mortgage
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans	63,295	62,374
Less: Allowance for loan losses	(449)	(434)	(508)	(504)
Commercial Real Estate | Owner Occupied
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans	499,331	495,872
Less: Allowance for loan losses	(3,014)	(3,558)	(3,387)	(3,302)
Commercial Real Estate | Non-Owner Occupied
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans	562,128	551,588
Less: Allowance for loan losses	(2,753)	(2,817)	(2,660)	(2,019)
Consumer and Other
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans	198,834	217,701
Less: Allowance for loan losses	$ (1,459)	$ (1,495)	$ (933)	$ (863)

Loans and Allowance for Loan 51

Loans and Allowance for Loan Losses - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Financing Receivable Recorded Investment Past Due [Line Items]
Carrying value of PCI loans	$ 85,752,000		$ 88,835,000
Accretion of interest income	1,687,000	$ 1,160,000
Non-accrual loans	3,233,000		3,205,000
Recorded investment in troubled debt restructurings	8,675,000		8,604,000
Allocation to specific reserves	159,000		172,000
Commitments to lend additional amounts to customers	3,000		2,000
Payment default for loans modified as troubled debt restructurings	0	0
Purchased Credit Impaired
Financing Receivable Recorded Investment Past Due [Line Items]
Carrying value of PCI loans	85,752,000		88,835,000
Accretion of interest income	2,201,000	1,023,000
Total purchase accounting contribution through accretion for purchased loans	1,687,000	$ 1,160,000
Non-accrual loans	0		0
Federal Reserve | Borrower in Custody Program
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans	1,215,509,000		724,312,000
Federal Home Loan Bank of Cincinnati
Financing Receivable Recorded Investment Past Due [Line Items]
Gross loans	$ 1,245,847,000		$ 968,567,000

Loans and Allowance for Loan 52

Loans and Allowance for Loan Losses - Changes in Accretable Yield on Purchase Credit Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Accounts Notes And Loans Receivable [Line Items]
Purchased Credit Impaired Accretable yield, Accretion	$ 1,687	$ 1,160
Purchased Credit Impaired
Accounts Notes And Loans Receivable [Line Items]
Purchased Credit Impaired Accretable yield, Beginning balance	(17,682)	(2,444)
Purchased Credit Impaired Accretable yield, Principal reductions/ pay-offs	(1,294)	(698)
Purchased Credit Impaired Accretable yield, Recoveries		(23)
Purchased Credit Impaired Accretable yield, Accretion	2,201	1,023
Purchased Credit Impaired Accretable yield, Other changes	(180)
Purchased Credit Impaired Accretable yield, Ending balance	$ (16,955)	$ (2,142)

Loans and Allowance for Loan 53

Loans and Allowance for Loan Losses - Allowance for Loan Losses by Portfolio Segment and Related Investment in Loans Net of Unearned Interest (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Accounts Notes And Loans Receivable [Line Items]
Beginning balance	$ 24,041	$ 21,747
Provision for loan losses	317	(257)
Recoveries of loans previously charged-off	709	1,850
Loans charged off	(661)	(442)
Ending balance	24,406	22,898
Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Beginning balance	4,461	5,309
Provision for loan losses	202	179
Recoveries of loans previously charged-off	135	83
Loans charged off	(220)	(169)
Ending balance	4,578	5,402
Construction
Accounts Notes And Loans Receivable [Line Items]
Beginning balance	7,135	4,940
Provision for loan losses	479	635
Recoveries of loans previously charged-off	252	29
Loans charged off		(6)
Ending balance	7,866	5,598
Residential Real Estate | 1-to-4 Family Mortgage
Accounts Notes And Loans Receivable [Line Items]
Beginning balance	3,197	3,197
Provision for loan losses	(30)	(239)
Recoveries of loans previously charged-off	15	26
Loans charged off	(60)	(88)
Ending balance	3,122	2,896
Residential Real Estate | Residential Line of Credit
Accounts Notes And Loans Receivable [Line Items]
Beginning balance	944	1,613
Provision for loan losses	214	(155)
Recoveries of loans previously charged-off	27	56
Loans charged off	(20)
Ending balance	1,165	1,514
Residential Real Estate | Multi-Family Mortgage
Accounts Notes And Loans Receivable [Line Items]
Beginning balance	434	504
Provision for loan losses	15	4
Ending balance	449	508
Commercial Real Estate | Owner Occupied
Accounts Notes And Loans Receivable [Line Items]
Beginning balance	3,558	3,302
Provision for loan losses	(567)	81
Recoveries of loans previously charged-off	23	4
Ending balance	3,014	3,387
Commercial Real Estate | Non-Owner Occupied
Accounts Notes And Loans Receivable [Line Items]
Beginning balance	2,817	2,019
Provision for loan losses	(115)	(998)
Recoveries of loans previously charged-off	51	1,639
Ending balance	2,753	2,660
Consumer and Other
Accounts Notes And Loans Receivable [Line Items]
Beginning balance	1,495	863
Provision for loan losses	119	236
Recoveries of loans previously charged-off	206	13
Loans charged off	(361)	(179)
Ending balance	$ 1,459	$ 933

Loans and Allowance for Loan 54

Loans and Allowance for Loan Losses - Allocation of Allowance for Loan Losses by Loan Category Broken Out Between Loans Individually Evaluated for Impairment and Collectively Evaluated for Impairment (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Accounts Notes And Loans Receivable [Line Items]
Individually evaluated for impairment	$ 159	$ 191
Collectively evaluated for impairment	24,247	23,850
Ending balance	24,406	24,041	$ 22,898	$ 21,747
Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Individually evaluated for impairment	19	20
Collectively evaluated for impairment	4,559	4,441
Ending balance	4,578	4,461	5,402	5,309
Construction
Accounts Notes And Loans Receivable [Line Items]
Collectively evaluated for impairment	7,866	7,135
Ending balance	7,866	7,135	5,598	4,940
Residential Real Estate | 1-to-4 Family Mortgage
Accounts Notes And Loans Receivable [Line Items]
Individually evaluated for impairment	16	18
Collectively evaluated for impairment	3,106	3,179
Ending balance	3,122	3,197	2,896	3,197
Residential Real Estate | Residential Line of Credit
Accounts Notes And Loans Receivable [Line Items]
Collectively evaluated for impairment	1,165	944
Ending balance	1,165	944	1,514	1,613
Residential Real Estate | Multi-Family Mortgage
Accounts Notes And Loans Receivable [Line Items]
Collectively evaluated for impairment	449	434
Ending balance	449	434	508	504
Commercial Real Estate | Owner Occupied
Accounts Notes And Loans Receivable [Line Items]
Individually evaluated for impairment	95	120
Collectively evaluated for impairment	2,919	3,438
Ending balance	3,014	3,558	3,387	3,302
Commercial Real Estate | Non-Owner Occupied
Accounts Notes And Loans Receivable [Line Items]
Individually evaluated for impairment	29	33
Collectively evaluated for impairment	2,724	2,784
Ending balance	2,753	2,817	2,660	2,019
Consumer and Other
Accounts Notes And Loans Receivable [Line Items]
Collectively evaluated for impairment	1,459	1,495
Ending balance	$ 1,459	$ 1,495	$ 933	$ 863

Loans and Allowance for Loan 55

Loans and Allowance for Loan Losses - Amount of Loans by Loan Category Broken Out Between Loans Individually Evaluated for Impairment and Collectively Evaluated for Impairment (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Accounts Notes And Loans Receivable [Line Items]
Individually evaluated for impairment	$ 9,018	$ 9,373
Collectively evaluated for impairment	3,149,893	3,068,703
Acquired with deteriorated credit quality	85,752	88,835
Gross loans	3,244,663	3,166,911
Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Individually evaluated for impairment	1,385	1,579
Collectively evaluated for impairment	761,779	711,352
Acquired with deteriorated credit quality	1,951	2,144
Gross loans	765,115	715,075
Construction
Accounts Notes And Loans Receivable [Line Items]
Individually evaluated for impairment	1,285	1,289
Collectively evaluated for impairment	457,785	439,309
Acquired with deteriorated credit quality	7,425	7,728
Gross loans	466,495	448,326
Residential Real Estate | 1-to-4 Family Mortgage
Accounts Notes And Loans Receivable [Line Items]
Individually evaluated for impairment	1,492	1,262
Collectively evaluated for impairment	467,329	456,229
Acquired with deteriorated credit quality	22,904	23,498
Gross loans	491,725	480,989
Residential Real Estate | Residential Line of Credit
Accounts Notes And Loans Receivable [Line Items]
Collectively evaluated for impairment	197,740	194,986
Gross loans	197,740	194,986
Residential Real Estate | Multi-Family Mortgage
Accounts Notes And Loans Receivable [Line Items]
Individually evaluated for impairment	964	978
Collectively evaluated for impairment	62,313	61,376
Acquired with deteriorated credit quality	18	20
Gross loans	63,295	62,374
Commercial Real Estate | Owner Occupied
Accounts Notes And Loans Receivable [Line Items]
Individually evaluated for impairment	2,150	2,520
Collectively evaluated for impairment	485,411	481,390
Acquired with deteriorated credit quality	11,770	11,962
Gross loans	499,331	495,872
Commercial Real Estate | Non-Owner Occupied
Accounts Notes And Loans Receivable [Line Items]
Individually evaluated for impairment	1,713	1,720
Collectively evaluated for impairment	542,351	531,704
Acquired with deteriorated credit quality	18,064	18,164
Gross loans	562,128	551,588
Consumer and Other
Accounts Notes And Loans Receivable [Line Items]
Individually evaluated for impairment	29	25
Collectively evaluated for impairment	175,185	192,357
Acquired with deteriorated credit quality	23,620	25,319
Gross loans	$ 198,834	$ 217,701

Loans and Allowance for Loan 56

Loans and Allowance for Loan Losses - Credit Quality Indicators by Portfolio Class (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	$ 3,158,911	$ 3,078,076
Purchased credit impaired loans	85,752	88,835
Total loans	3,244,663	3,166,911
Pass
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	3,013,068	2,940,174
Total loans	3,013,068	2,940,174
Watch
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	123,747	114,401
Purchased credit impaired loans	55,013	56,848
Total loans	178,760	171,249
Substandard
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	22,096	23,501
Purchased credit impaired loans	30,739	31,987
Total loans	52,835	55,488
Commercial and Industrial
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	763,164	712,931
Purchased credit impaired loans	1,951	2,144
Total loans	765,115	715,075
Commercial and Industrial | Pass
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	704,689	657,595
Commercial and Industrial | Watch
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	54,124	50,946
Purchased credit impaired loans	1,351	1,499
Commercial and Industrial | Substandard
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	4,351	4,390
Purchased credit impaired loans	600	645
Construction
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	459,070	440,598
Purchased credit impaired loans	7,425	7,728
Total loans	466,495	448,326
Construction | Pass
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	441,718	431,242
Construction | Watch
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	15,468	7,388
Purchased credit impaired loans	3,422	3,324
Construction | Substandard
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	1,884	1,968
Purchased credit impaired loans	4,003	4,404
Residential Real Estate | 1-to-4 Family Mortgage
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	468,821	457,491
Purchased credit impaired loans	22,904	23,498
Total loans	491,725	480,989
Residential Real Estate | Residential Line of Credit
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	197,740	194,986
Total loans	197,740	194,986
Residential Real Estate | Multi-Family Mortgage
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	63,277	62,354
Purchased credit impaired loans	18	20
Total loans	63,295	62,374
Residential Real Estate | Pass | 1-to-4 Family Mortgage
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	452,858	440,202
Residential Real Estate | Pass | Residential Line of Credit
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	194,887	192,427
Residential Real Estate | Pass | Multi-Family Mortgage
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	62,175	61,234
Residential Real Estate | Watch | 1-to-4 Family Mortgage
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	9,027	9,522
Purchased credit impaired loans	19,454	20,284
Residential Real Estate | Watch | Residential Line of Credit
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	1,677	1,184
Residential Real Estate | Watch | Multi-Family Mortgage
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	138	142
Residential Real Estate | Substandard | 1-to-4 Family Mortgage
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	6,936	7,767
Purchased credit impaired loans	3,450	3,214
Residential Real Estate | Substandard | Residential Line of Credit
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	1,176	1,375
Residential Real Estate | Substandard | Multi-Family Mortgage
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	964	978
Purchased credit impaired loans	18	20
Commercial Real Estate | Owner Occupied
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	487,561	483,910
Purchased credit impaired loans	11,770	11,962
Total loans	499,331	495,872
Commercial Real Estate | Non-Owner Occupied
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	544,064	533,424
Purchased credit impaired loans	18,064	18,164
Total loans	562,128	551,588
Commercial Real Estate | Pass | Owner Occupied
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	457,347	451,140
Commercial Real Estate | Pass | Non-Owner Occupied
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	527,134	517,253
Commercial Real Estate | Watch | Owner Occupied
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	25,962	28,308
Purchased credit impaired loans	4,565	4,631
Commercial Real Estate | Watch | Non-Owner Occupied
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	14,972	14,199
Purchased credit impaired loans	7,517	7,359
Commercial Real Estate | Substandard | Owner Occupied
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	4,252	4,462
Purchased credit impaired loans	7,205	7,331
Commercial Real Estate | Substandard | Non-Owner Occupied
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	1,958	1,972
Purchased credit impaired loans	10,547	10,805
Consumer and Other
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	175,214	192,382
Purchased credit impaired loans	23,620	25,319
Total loans	198,834	217,701
Consumer and Other | Pass
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	172,260	189,081
Consumer and Other | Watch
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	2,379	2,712
Purchased credit impaired loans	18,704	19,751
Consumer and Other | Substandard
Financing Receivable Allowance For Credit Losses [Line Items]
Loans, excluding purchased credit impaired loans	575	589
Purchased credit impaired loans	$ 4,916	$ 5,568

Loans and Allowance for Loan 57

Loans and Allowance for Loan Losses - Past Due Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	$ 3,244,663	$ 3,166,911
Purchased Credit Impaired
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	85,752	88,835
Non Accruing
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	6,954	8,101
30-89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	8,549	15,063
90 Days or More and Accruing Interest
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	2,689	1,996
Financing Receivables Current
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	3,140,719	3,052,916
Commercial and Industrial
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	765,115	715,075
Commercial and Industrial | Purchased Credit Impaired
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	1,951	2,144
Commercial and Industrial | Non Accruing
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	910	533
Commercial and Industrial | 30-89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	1,385	5,859
Commercial and Industrial | 90 Days or More and Accruing Interest
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	619	90
Commercial and Industrial | Financing Receivables Current
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	760,250	706,449
Construction
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	466,495	448,326
Construction | Purchased Credit Impaired
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	7,425	7,728
Construction | Non Accruing
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	460	300
Construction | 30-89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	250	1,412
Construction | 90 Days or More and Accruing Interest
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	329	241
Construction | Financing Receivables Current
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	458,031	438,645
Residential Real Estate | 1-to-4 Family Mortgage
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	491,725	480,989
Residential Real Estate | 1-to-4 Family Mortgage | Purchased Credit Impaired
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	22,904	23,498
Residential Real Estate | 1-to-4 Family Mortgage | Non Accruing
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	2,009	2,548
Residential Real Estate | Residential Line of Credit
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	197,740	194,986
Residential Real Estate | Residential Line of Credit | Non Accruing
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	370	699
Residential Real Estate | Multi-Family Mortgage
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	63,295	62,374
Residential Real Estate | Multi-Family Mortgage | Purchased Credit Impaired
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	18	20
Residential Real Estate | 30-89 Days Past Due | 1-to-4 Family Mortgage
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	3,666	4,678
Residential Real Estate | 30-89 Days Past Due | Residential Line of Credit
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	1,013	527
Residential Real Estate | 90 Days or More and Accruing Interest | 1-to-4 Family Mortgage
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	1,067	956
Residential Real Estate | 90 Days or More and Accruing Interest | Residential Line of Credit
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	356	134
Residential Real Estate | Financing Receivables Current | 1-to-4 Family Mortgage
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	462,079	449,309
Residential Real Estate | Financing Receivables Current | Residential Line of Credit
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	196,001	193,626
Residential Real Estate | Financing Receivables Current | Multi-Family Mortgage
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	63,277	62,354
Commercial Real Estate | Owner Occupied
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	499,331	495,872
Commercial Real Estate | Owner Occupied | Purchased Credit Impaired
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	11,770	11,962
Commercial Real Estate | Owner Occupied | Non Accruing
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	1,903	2,582
Commercial Real Estate | Non-Owner Occupied
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	562,128	551,588
Commercial Real Estate | Non-Owner Occupied | Purchased Credit Impaired
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	18,064	18,164
Commercial Real Estate | Non-Owner Occupied | Non Accruing
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	1,219	1,371
Commercial Real Estate | 30-89 Days Past Due | Owner Occupied
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	202	521
Commercial Real Estate | 30-89 Days Past Due | Non-Owner Occupied
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	393	121
Commercial Real Estate | 90 Days or More and Accruing Interest | Owner Occupied
Financing Receivable Recorded Investment Past Due [Line Items]
Loans		358
Commercial Real Estate | Financing Receivables Current | Owner Occupied
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	485,456	480,449
Commercial Real Estate | Financing Receivables Current | Non-Owner Occupied
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	542,452	531,932
Consumer and Other
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	198,834	217,701
Consumer and Other | Purchased Credit Impaired
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	23,620	25,319
Consumer and Other | Non Accruing
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	83	68
Consumer and Other | 30-89 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	1,640	1,945
Consumer and Other | 90 Days or More and Accruing Interest
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	318	217
Consumer and Other | Financing Receivables Current
Financing Receivable Recorded Investment Past Due [Line Items]
Loans	$ 173,173	$ 190,152

Loans and Allowance for Loan 58

Loans and Allowance for Loan Losses - Impaired Loans Recognized, Segregated by Class (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Financing Receivable Impaired [Line Items]
Impaired loans with related allowance, Recorded investment	$ 970		$ 1,235
Impaired loans with related allowance, Unpaid principal	1,339		1,821
Impaired loans with related allowance, Related allowance	159		191
Impaired loan with no related allowance, Recorded investment	8,048		8,138
Impaired loan with no related allowance, Unpaid principal	9,548		9,451
Total impaired loans, Recorded investment	9,018		9,373
Total impaired loans, Unpaid principal	10,887		11,272
Impaired loan with no related allowance, Average recorded investment	8,095	$ 8,828
Impaired loan with no related allowance, Interest income recognized (cash basis)	110	81
Impaired loans with related allowance, Average recorded investment	1,104	2,357
Impaired loans with related allowance, Interest income recognized (cash basis)	11	17
Total impaired loans, Average recorded investment	9,199	11,185
Total impaired loans, Interest income recognized (cash basis)	121	98
Commercial and Industrial
Financing Receivable Impaired [Line Items]
Impaired loans with related allowance, Recorded investment	52		53
Impaired loans with related allowance, Unpaid principal	52		53
Impaired loans with related allowance, Related allowance	19		20
Impaired loan with no related allowance, Recorded investment	1,333		1,526
Impaired loan with no related allowance, Unpaid principal	1,539		1,570
Impaired loan with no related allowance, Average recorded investment	1,430	584
Impaired loan with no related allowance, Interest income recognized (cash basis)	16	9
Impaired loans with related allowance, Average recorded investment	53	791
Impaired loans with related allowance, Interest income recognized (cash basis)	1	5
Residential Real Estate | 1-to-4 Family Mortgage
Financing Receivable Impaired [Line Items]
Impaired loans with related allowance, Recorded investment	191		194
Impaired loans with related allowance, Unpaid principal	492		495
Impaired loans with related allowance, Related allowance	16		18
Impaired loan with no related allowance, Recorded investment	1,301		1,068
Impaired loan with no related allowance, Unpaid principal	1,306		1,072
Impaired loan with no related allowance, Average recorded investment	1,185	2,243
Impaired loan with no related allowance, Interest income recognized (cash basis)	13	17
Impaired loans with related allowance, Average recorded investment	193	101
Impaired loans with related allowance, Interest income recognized (cash basis)	2
Residential Real Estate | Multi-Family Mortgage
Financing Receivable Impaired [Line Items]
Impaired loan with no related allowance, Recorded investment	964		978
Impaired loan with no related allowance, Unpaid principal	964		978
Impaired loan with no related allowance, Average recorded investment	971	1,021
Impaired loan with no related allowance, Interest income recognized (cash basis)	12	11
Residential Real Estate | Residential Line of Credit
Financing Receivable Impaired [Line Items]
Impaired loan with no related allowance, Average recorded investment		156
Commercial Real Estate | Owner Occupied
Financing Receivable Impaired [Line Items]
Impaired loans with related allowance, Recorded investment	585		844
Impaired loans with related allowance, Unpaid principal	646		1,123
Impaired loans with related allowance, Related allowance	95		120
Impaired loan with no related allowance, Recorded investment	1,565		1,676
Impaired loan with no related allowance, Unpaid principal	2,077		2,168
Impaired loan with no related allowance, Average recorded investment	1,621	1,977
Impaired loan with no related allowance, Interest income recognized (cash basis)	32	38
Impaired loans with related allowance, Average recorded investment	715	629
Impaired loans with related allowance, Interest income recognized (cash basis)	6	12
Commercial Real Estate | Non-Owner Occupied
Financing Receivable Impaired [Line Items]
Impaired loans with related allowance, Recorded investment	142		144
Impaired loans with related allowance, Unpaid principal	149		150
Impaired loans with related allowance, Related allowance	29		33
Impaired loan with no related allowance, Recorded investment	1,571		1,576
Impaired loan with no related allowance, Unpaid principal	2,320		2,325
Impaired loan with no related allowance, Average recorded investment	1,574	1,325
Impaired loan with no related allowance, Interest income recognized (cash basis)	7
Impaired loans with related allowance, Average recorded investment	143	835
Impaired loans with related allowance, Interest income recognized (cash basis)	2
Construction
Financing Receivable Impaired [Line Items]
Impaired loan with no related allowance, Recorded investment	1,285		1,289
Impaired loan with no related allowance, Unpaid principal	1,313		1,313
Impaired loan with no related allowance, Average recorded investment	1,287	1,496
Impaired loan with no related allowance, Interest income recognized (cash basis)	30	5
Consumer and Other
Financing Receivable Impaired [Line Items]
Impaired loan with no related allowance, Recorded investment	29		25
Impaired loan with no related allowance, Unpaid principal	29		$ 25
Impaired loan with no related allowance, Average recorded investment	$ 27	26
Impaired loan with no related allowance, Interest income recognized (cash basis)		1
Impaired loans with related allowance, Average recorded investment		$ 1

Loans and Allowance for Loan 59

Loans and Allowance for Loan Losses - Financial Effect of TDRs (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)loan	Mar. 31, 2017USD ($)loan
Financing Receivable Modifications [Line Items]
Number of loans | loan	2	4
Pre-modification outstanding recorded investment	$ 254	$ 1,093
Post-modification outstanding recorded investment	$ 254	$ 1,093
Residential Real Estate | 1-to-4 Family Mortgage
Financing Receivable Modifications [Line Items]
Number of loans | loan	1	1
Pre-modification outstanding recorded investment	$ 249	$ 5
Post-modification outstanding recorded investment	$ 249	$ 5
Consumer and Other
Financing Receivable Modifications [Line Items]
Number of loans | loan	1
Pre-modification outstanding recorded investment	$ 5
Post-modification outstanding recorded investment	$ 5
Commercial Real Estate | Owner Occupied
Financing Receivable Modifications [Line Items]
Number of loans | loan		1
Pre-modification outstanding recorded investment		$ 377
Post-modification outstanding recorded investment		$ 377
Commercial Real Estate | Non-Owner Occupied
Financing Receivable Modifications [Line Items]
Number of loans | loan		2
Pre-modification outstanding recorded investment		$ 711
Post-modification outstanding recorded investment		$ 711

Other Real Estate Owned - Summa

Other Real Estate Owned - Summary of Other Real Estate Owned (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Real Estate [Abstract]
Balance at beginning of period	$ 16,442	$ 7,403
Transfers from loans	630	888
Properties sold	(1,432)	(2,228)
(Loss) gain on sale of other real estate owned	(43)	871
Transferred to loans	(120)
Write-downs and partial liquidations	(143)	(123)
Balance at end of period	$ 15,334	$ 6,811

Other Real Estate Owned - Addit

Other Real Estate Owned - Additional Information (Details) - Residential Real Estate Properties - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Real Estate Properties [Line Items]
Foreclosed residential real estate properties	$ 3,902	$ 3,631
Total foreclosure proceedings in process	$ 326	$ 19

Mortgage Servicing Rights - Sch

Mortgage Servicing Rights - Schedule of Changes in Mortgage Servicing Rights (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Transfers And Servicing [Abstract]
Carrying value prior to policy change	$ 76,107	$ 32,070
Fair value impact of change in accounting policy		1,011
Carrying value at beginning of period	76,107	33,081
Capitalization	13,510	15,013
Change in fair value:
Due to pay-offs/pay-downs	(3,060)	(265)
Due to change in valuation inputs or assumptions	6,603	(236)
Carrying value at March 31	$ 93,160	$ 47,593

Mortgage Servicing Rights - S63

Mortgage Servicing Rights - Schedule of Servicing Income and Expense Included in Mortgage Banking Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Servicing income:
Servicing income	$ 4,793	$ 2,748
Change in fair value of mortgage servicing rights	3,543	(501)
Change in fair value of mortgage servicing rights hedging instruments	(5,256)
Gross servicing income	3,080	2,247
Gross direct servicing expenses	1,795	1,020
Net servicing income	$ 1,285	$ 1,227

Mortgage Servicing Rights - S64

Mortgage Servicing Rights - Schedule of Data and Key Economic Assumptions Related to Mortgage Servicing Rights (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Transfers And Servicing [Abstract]
Unpaid principal balance	$ 7,423,932	$ 6,529,431
Weighted-average prepayment speed (CPR)	7.69%	8.90%
Estimated impact on fair value of a 10% increase	$ (2,997)	$ (3,026)
Estimated impact on fair value of a 20% increase	$ (5,780)	$ (5,855)
Discount rate	10.01%	9.75%
Estimated impact on fair value of a 100 bp increase	$ (3,829)	$ (3,052)
Estimated impact on fair value of a 200 bp increase	$ (7,379)	$ (5,867)
Weighted-average coupon interest rate	3.98%	3.94%
Weighted-average servicing fee (basis points)	0.28%	0.28%
Weighted-average remaining maturity (in months)	322 years	335 months

Mortgage Servicing Rights - Add

Mortgage Servicing Rights - Additional Information (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Transfers And Servicing [Abstract]
Mortgage loans serviced related to bulk sale of mortgage servicing rights	$ 0	$ 0

Income Taxes - Schedule of Allo

Income Taxes - Schedule of Allocation of Federal and State Income Taxes between Current and Deferred Portions (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Deferred	$ 5,482	$ 5,425
Total	$ 5,482	$ 5,425

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Taxes [Line Items]
Statutory federal income tax rate	21.00%	35.00%
Tax periods open for examination	2,013
Federal
Income Taxes [Line Items]
Net operating loss carryforward	$ 6.9
State
Income Taxes [Line Items]
Net operating loss carryforward	$ 5.8
Net operating loss expiration starting period	2,030

Income Taxes - Schedule of Diff

Income Taxes - Schedule of Differences in Federal Income Tax Expense and State Tax Expense from Statutory Federal and State Rates (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Federal taxes calculated at statutory rate	$ 5,300	$ 5,305
Increase (decrease) resulting from:
State taxes, net of federal benefit	1,143	610
Benefit of equity based compensation	(736)	(195)
Municipal interest income	(201)	(366)
Bank owned life insurance	(12)	(21)
Other	(12)	92
Total	$ 5,482	$ 5,425
Federal taxes calculated at statutory rate, percentage	21.00%	35.00%
Increase (decrease) resulting from:
State taxes, net of federal benefit, percentage	4.50%	4.00%
Benefit of equity based compensation, percentage	(3.00%)	(1.30%)
Municipal interest income, percentage	(0.80%)	(2.40%)
Bank owned life insurance, percentage	(0.00%)	(0.20%)
Other, percentage	0.00%	0.60%
Income tax expense, as reported, percentage	21.70%	35.70%

Income Taxes - Schedule of Net

Income Taxes - Schedule of Net Deferred Tax liability (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Deferred tax assets:
Allowance for loan losses	$ 6,359	$ 6,264
Amortization of core deposit intangible	832	759
Deferred compensation	3,711	6,158
Unrealized loss on available-for-sale debt securities	3,830	988
Other	5,501	3,599
Subtotal	20,233	17,768
Deferred tax liabilities:
FHLB stock dividends	(550)	(550)
Depreciation	(4,344)	(4,115)
Cash flow hedges	(866)
Mortgage servicing rights	(24,274)	(19,830)
Other	(5,564)	(5,131)
Subtotal	(35,598)	(29,626)
Net deferred tax liability	$ (15,365)	$ (11,858)

Commitments and Contingencies -

Commitments and Contingencies - Summary of Financial Instruments with Off-Balance Sheet Credit Risk (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Financial instruments with off-balance sheet credit loss	$ 981,485	$ 1,000,158
Commitments to Extend Credit, Excluding Interest Rate Lock Commitments
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Financial instruments with off-balance sheet credit loss	959,271	977,276
Letter of Credit
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Financial instruments with off-balance sheet credit loss	$ 22,214	$ 22,882

Commitments and Contingencies71

Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Commitments And Contingencies Disclosure [Abstract]
Total principal amount of loans repurchased or indemnified	$ 1,119	$ 849

Commitments and Contingencies72

Commitments and Contingencies - Summary of Allowance for Loan Repurchases or Indemnifications (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Commitments And Contingencies Disclosure [Abstract]
Balance at beginning of period	$ 3,386	$ 2,659
Provision for loan repurchases or indemnifications	186	183
Recoveries on previous losses	(58)
Balance at end of period	$ 3,514	$ 2,842

Derivatives - Additional Inform

Derivatives - Additional Information (Details) $ in Thousands	1 Months Ended	3 Months Ended
	Jul. 31, 2017USD ($)InterestRateSwap	Mar. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Jun. 30, 2017USD ($)InterestRateSwap
Derivative [Line Items]
Lock in period for interest rates		45 days
Long-term debt		$ 139,586	$ 143,302
Notional amount	$ 100,000
Interest rate swap maturity date		Jun. 30, 2024
Designated as Hedging
Derivative [Line Items]
Notional amount		$ 30,000	130,000
Subordinated Debentures
Derivative [Line Items]
Number of derivative instruments | InterestRateSwap				2
Long-term debt				$ 30,930
Interest Rate Swaps
Derivative [Line Items]
Number of derivative instruments | InterestRateSwap	3
Interest Rate Swaps | Designated as Hedging
Derivative [Line Items]
Fair value of interest rate swap			1,127
Gain on cancellation of swaps		1,564
Interest Rate Swaps | Subordinated Debentures
Derivative [Line Items]
Notional amount				$ 30,000
Fair value of interest rate swap		$ 1,037	$ 305
Interest Rate Swaps Three
Derivative [Line Items]
Notional amount	$ 30,000
Derivative notional amount maturity period	3 years
Interest Rate Swaps Four
Derivative [Line Items]
Notional amount	$ 35,000
Derivative notional amount maturity period	4 years
Interest Rate Swaps Five
Derivative [Line Items]
Notional amount	$ 35,000
Derivative notional amount maturity period	5 years

Derivatives - Schedule of Deriv

Derivatives - Schedule of Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Jul. 31, 2017
Derivatives Fair Value [Line Items]
Notional amount			$ 100,000
Not Designated As Hedging
Derivatives Fair Value [Line Items]
Notional amount	$ 2,053,274	$ 1,810,484
Asset	13,867	8,258
Liability	3,655	1,699
Not Designated As Hedging | Interest rate contracts
Derivatives Fair Value [Line Items]
Notional amount	175,726	146,754
Asset	2,360	1,146
Liability	2,360	1,146
Not Designated As Hedging | Forward commitments
Derivatives Fair Value [Line Items]
Notional amount	919,571	870,574
Liability	1,295	553
Not Designated As Hedging | Interest rate-lock commitments
Derivatives Fair Value [Line Items]
Notional amount	692,977	504,156
Asset	10,179	6,768
Not Designated As Hedging | Futures Contracts
Derivatives Fair Value [Line Items]
Notional amount	243,000	283,000
Asset	1,180	315
Not Designated As Hedging | Option Contracts
Derivatives Fair Value [Line Items]
Notional amount	22,000	6,000
Asset	148	29
Designated as Hedging
Derivatives Fair Value [Line Items]
Notional amount	30,000	130,000
Asset	1,037	1,432
Designated as Hedging | Interest Rate Swaps
Derivatives Fair Value [Line Items]
Notional amount	30,000	130,000
Asset	$ 1,037	$ 1,432

Derivatives - Schedule of Gains

Derivatives - Schedule of Gains (Losses) Included in the Consolidated Statements of Income Related to Derivative Financial Instruments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Derivatives Fair Value [Line Items]
Gains (losses) on derivative financial instruments	$ 6,325	$ (378)
Derivatives Not Designated As Hedging Instruments | Included in Mortgage Banking Income | Interest rate-lock commitments
Derivatives Fair Value [Line Items]
Gains (losses) on derivative financial instruments	3,411	2,942
Derivatives Not Designated As Hedging Instruments | Included in Mortgage Banking Income | Forward commitments
Derivatives Fair Value [Line Items]
Gains (losses) on derivative financial instruments	5,318	$ (3,320)
Derivatives Not Designated As Hedging Instruments | Included in Mortgage Banking Income | Futures Contracts
Derivatives Fair Value [Line Items]
Gains (losses) on derivative financial instruments	(2,447)
Derivatives Not Designated As Hedging Instruments | Included in Mortgage Banking Income | Option Contracts
Derivatives Fair Value [Line Items]
Gains (losses) on derivative financial instruments	43
Designated as Hedging
Derivatives Fair Value [Line Items]
Amount of gain reclassified from other comprehensive income and recognized in interest expense on long-term debt	$ (32)

Derivatives - Schedule of Other

Derivatives - Schedule of Other Comprehensive Income (Loss), Net of Tax, for Derivative Instruments Designated as Cash Flow Hedges (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)
Derivatives Fair Value [Line Items]
Amount of gain recognized in other comprehensive income, net of tax	$ 1,273
Designated as Hedging
Derivatives Fair Value [Line Items]
Amount of gain recognized in other comprehensive income, net of tax	$ 1,273

Fair Value Measurements - Estim

Fair Value Measurements - Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financial assets:
Interest receivable	$ 13,920	$ 13,069
Mortgage servicing rights, net	93,160	76,107	$ 33,081
Carrying Amount
Financial assets:
Cash and cash equivalents	73,700	119,751
Investment securities	597,347	543,992
Federal Home Loan Bank Stock	11,810	11,412
Loans, net	3,220,257	3,142,870
Loans held for sale	414,518	526,185
Interest receivable	13,920	13,069
Mortgage servicing rights, net	93,160	76,107
Derivatives assets	14,904	9,690
Financial liabilities:
Deposits, Without stated maturities	3,059,142	2,976,066
Deposits, With stated maturities	707,009	688,329
Securities sold under agreement to repurchase	14,724	14,293
Short term borrowings	138,707	190,000
Interest payable	1,857	1,504
Long-term debt	139,586	143,302
Derivatives liabilities	3,655	1,699
Fair Value
Financial assets:
Cash and cash equivalents	73,700	119,751
Investment securities	597,347	543,992
Loans, net	3,213,659	3,141,400
Loans held for sale	414,518	526,185
Interest receivable	13,920	13,069
Mortgage servicing rights, net	93,160	76,107
Derivatives assets	14,904	9,690
Financial liabilities:
Deposits, Without stated maturities	3,059,142	2,976,066
Deposits, With stated maturities	706,585	682,403
Securities sold under agreement to repurchase	14,724	14,293
Short term borrowings	138,707	190,000
Interest payable	1,857	1,504
Long-term debt	138,456	149,135
Derivatives liabilities	3,655	1,699
Fair Value | Fair Value Level 1
Financial assets:
Cash and cash equivalents	73,700	119,751
Financial liabilities:
Deposits, Without stated maturities	3,059,142	2,976,066
Securities sold under agreement to repurchase	14,724	14,293
Short term borrowings	138,707	190,000
Interest payable	526	575
Fair Value | Fair Value Level 2
Financial assets:
Investment securities	597,347	540,388
Loans, net		3,064,373
Loans held for sale	414,518	526,185
Interest receivable	13,920	13,069
Derivatives assets	14,904	9,690
Financial liabilities:
Deposits, With stated maturities	706,585	682,403
Interest payable	1,331	929
Long-term debt	138,456	149,135
Derivatives liabilities	3,655	1,699
Fair Value | Fair Value Level 3
Financial assets:
Investment securities		3,604
Loans, net	3,213,659	77,027
Mortgage servicing rights, net	$ 93,160	$ 76,107

Fair Value Measurements - Balan

Fair Value Measurements - Balances and Levels of Assets Measured at Fair Value on Recurring and Nonrecurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financial assets:
Mortgage servicing rights, net	$ 93,160	$ 76,107	$ 33,081
Impaired loans	9,018	9,373
Available-for-sale securities, at fair value		543,992
Fair Value, Measurements, Recurring
Financial assets:
Investment securities	597,347
Loans held for sale	414,518	526,185
Mortgage servicing rights, net	93,160	76,107
Derivatives assets	14,904	9,690
Available-for-sale securities, at fair value		543,992
Financial liabilities:
Derivatives liabilities	3,655	1,699
Fair Value, Measurements, Recurring | U.S. Government Agency Securities
Financial assets:
Investment securities	982
Available-for-sale securities, at fair value		986
Fair Value, Measurements, Recurring | Mortgage-backed Securities
Financial assets:
Investment securities	472,930
Available-for-sale securities, at fair value		418,781
Fair Value, Measurements, Recurring | Municipals, Tax Exempt
Financial assets:
Investment securities	113,158
Available-for-sale securities, at fair value		109,251
Fair Value, Measurements, Recurring | Treasury Securities
Financial assets:
Investment securities	7,178
Available-for-sale securities, at fair value		7,252
Fair Value, Measurements, Recurring | Equity Securities
Financial assets:
Investment securities	3,099
Available-for-sale securities, at fair value		7,722
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Financial assets:
Investment securities	597,347
Loans held for sale	414,518	526,185
Derivatives assets	14,904	9,690
Available-for-sale securities, at fair value		540,388
Financial liabilities:
Derivatives liabilities	3,655	1,699
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | U.S. Government Agency Securities
Financial assets:
Investment securities	982
Available-for-sale securities, at fair value		986
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Mortgage-backed Securities
Financial assets:
Investment securities	472,930
Available-for-sale securities, at fair value		418,781
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Municipals, Tax Exempt
Financial assets:
Investment securities	113,158
Available-for-sale securities, at fair value		109,251
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Treasury Securities
Financial assets:
Investment securities	7,178
Available-for-sale securities, at fair value		7,252
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Equity Securities
Financial assets:
Investment securities	3,099
Available-for-sale securities, at fair value		4,118
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Financial assets:
Mortgage servicing rights, net	93,160	76,107
Available-for-sale securities, at fair value		3,604
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Equity Securities
Financial assets:
Available-for-sale securities, at fair value		3,604
Fair Value, Measurements, Nonrecurring
Financial assets:
Other real estate owned	800	13,174
Impaired loans	144	77,027
Fair Value, Measurements, Nonrecurring | Commercial and Industrial
Financial assets:
Impaired loans		1,971
Fair Value, Measurements, Nonrecurring | Consumer and Other
Financial assets:
Impaired loans		25,320
Fair Value, Measurements, Nonrecurring | Construction Loans | Commercial and Industrial
Financial assets:
Impaired loans		4,211
Fair Value, Measurements, Nonrecurring | 1-to-4 Family Mortgage | Residential Real Estate
Financial assets:
Impaired loans	144	21,902
Fair Value, Measurements, Nonrecurring | Owner Occupied | Commercial Real Estate
Financial assets:
Impaired loans		10,030
Fair Value, Measurements, Nonrecurring | Non-Owner Occupied | Commercial Real Estate
Financial assets:
Impaired loans		13,593
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3)
Financial assets:
Other real estate owned	800	13,174
Impaired loans	144	77,027
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Commercial and Industrial
Financial assets:
Impaired loans		1,971
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Consumer and Other
Financial assets:
Impaired loans		25,320
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Construction Loans | Commercial and Industrial
Financial assets:
Impaired loans		4,211
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | 1-to-4 Family Mortgage | Residential Real Estate
Financial assets:
Impaired loans	$ 144	21,902
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Owner Occupied | Commercial Real Estate
Financial assets:
Impaired loans		10,030
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Non-Owner Occupied | Commercial Real Estate
Financial assets:
Impaired loans		$ 13,593

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Changes in Fair Value on Available-for-Sale Securities Measured at Fair Value on Recurring Basis using Significant Unobservable Inputs or Level 3 Inputs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Fair Value Disclosures [Abstract]
Balance at beginning of period	$ 3,604	$ 4,549
Reclassification of equity securities without a readily determinable fair value to other assets	(3,604)	0
Balance at end of period	$ 0	$ 4,549

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Reclassification of other securities to other assets	$ 3,604	$ 0
Mortgage Loans
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Net gains from fair value changes of mortgage loans	2,121	$ 7,606
GNMA
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Mortgage loans previously sold	45,933
Mortgage loans held for sale measured at fair value	0		$ 43,035
ASU 2016-01
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Reclassification of other securities to other assets	$ 3,604

Fair Value Measurements - Infor

Fair Value Measurements - Information about Significant Unobservable Inputs (Level 3) Used in Valuation of Assets Measured at Fair Value on Nonrecurring Basis (Details) - Fair Value, Measurements, Nonrecurring - Significant Unobservable Inputs (Level 3) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Valuation of collateral | Minimum
Fair Value Inputs Assets Quantitative Information [Line Items]
Discount rate	0.00%	0.00%
Valuation of collateral | Maximum
Fair Value Inputs Assets Quantitative Information [Line Items]
Discount rate	30.00%	30.00%
Valuation of collateral | Impaired Loans
Fair Value Inputs Assets Quantitative Information [Line Items]
Fair value of assets	$ 144	$ 77,027
Appraised value of property less costs to sell | Minimum
Fair Value Inputs Assets Quantitative Information [Line Items]
Discount rate	0.00%	0.00%
Appraised value of property less costs to sell | Maximum
Fair Value Inputs Assets Quantitative Information [Line Items]
Discount rate	15.00%	15.00%
Appraised value of property less costs to sell | Other Real Estate Owned
Fair Value Inputs Assets Quantitative Information [Line Items]
Fair value of assets	$ 800	$ 13,174

Fair Value Measurements - Sched

Fair Value Measurements - Schedule of Differences between Fair Value and Principal Balance for Loans Held for Sale Measured at Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Fair Value
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Mortgage loans held for sale measured at fair value	$ 414,017	$ 482,089
Past due loans of 90 days or more		320
Nonaccrual loans	501	741
Aggregate Unpaid Principal Balance
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Mortgage loans held for sale measured at fair value	401,087	467,039
Past due loans of 90 days or more		320
Nonaccrual loans	501	741
Difference
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Mortgage loans held for sale measured at fair value	$ 12,930	$ 15,050

Segment Reporting - Additional

Segment Reporting - Additional Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)Segment	Mar. 31, 2017USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | Segment	2
Interest paid	$ 6,066	$ 2,330
Interest income	50,693	29,006
Mortgage Segment
Segment Reporting Information [Line Items]
Interest paid	$ 4,508	$ 3,551
Mortgage Segment | Prime Interest Rate
Segment Reporting Information [Line Items]
Warehouse line of credit interest rate	4.75%	4.00%
Banking Segment
Segment Reporting Information [Line Items]
Interest income	$ 4,508	$ 3,551

Segment Reporting - Schedule of

Segment Reporting - Schedule of Segment Financial Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Segment Reporting Information [Line Items]
Net interest income	$ 48,429	$ 30,251
Provision for loan losses	317	(257)
Mortgage banking income	28,184	25,581
Net, change in fair value of mortgage servicing rights		(501)
Change in fair value of mortgage servicing rights	(1,713)
Other noninterest income	6,804	6,007
Depreciation and amortization	1,106	1,002
Amortization of intangibles	853	392
Other noninterest mortgage banking expense	23,879	22,368
Other noninterest expense	30,313	22,655
Income before income taxes	25,236	15,178
Income tax expense	5,482	5,425
Net income	19,754	9,753
Total assets	4,725,416	3,166,459	$ 4,727,713
Goodwill	137,190	46,867	$ 137,190
Banking Segment
Segment Reporting Information [Line Items]
Net interest income	48,771	29,856
Provision for loan losses	317	(257)
Mortgage banking income	6,108	5,666
Other noninterest income	6,804	6,007
Depreciation and amortization	978	864
Amortization of intangibles	853	392
Other noninterest mortgage banking expense	5,097	4,836
Other noninterest expense	30,313	22,655
Income before income taxes	24,125	13,039
Total assets	4,220,543	2,705,118
Goodwill	137,090	46,767
Mortgage Segment
Segment Reporting Information [Line Items]
Net interest income	(342)	395
Mortgage banking income	22,076	19,915
Net, change in fair value of mortgage servicing rights		(501)
Change in fair value of mortgage servicing rights	(1,713)
Depreciation and amortization	128	138
Other noninterest mortgage banking expense	18,782	17,532
Income before income taxes	1,111	2,139
Total assets	504,873	461,341
Goodwill	$ 100	$ 100

Segment Reporting - Schedule 85

Segment Reporting - Schedule of Segment Financial Information (Parenthetical) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Information [Line Items]
Merger and conversion	$ 1,193	$ 487
Clayton Banks
Segment Reporting Information [Line Items]
Merger and conversion	$ 1,193	$ 487

Minimum Capital Requirements -

Minimum Capital Requirements - Additional Information (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Banking And Thrift [Abstract]
Capital conservative current buffer percentage	1.88%	1.25%
Capital conservative buffer percentage	2.50%
Description of capital adequacy purposes	Beginning in 2016, an additional conservation buffer was added to the minimum requirements for capital adequacy purposes, subject to a three year phase-in period. As of March 31, 2018 and December 31, 2017, the buffer was 1.88% and 1.25%, respectively. The capital conservative buffer will be fully phased in January 1, 2019 at 2.5 percent.

Minimum Capital Requirements 87

Minimum Capital Requirements - Schedule of Actual and Required Capital Amounts and Ratios (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
FB Financial Corporation
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital (to risk-weighted assets), Actual Amount	$ 506,921	$ 496,422
Total Capital (to risk-weighted assets), Actual Ratio	12.30%	12.00%
Total Capital (to risk-weighted assets), For capital adequacy purposes, Amount	$ 328,636	$ 330,672
Total Capital (to risk-weighted assets), For capital adequacy purposes, Ratio	8.00%	8.00%
Total Capital (to risk-weighted assets), Minimum Capital adequacy with capital buffer, Amount	$ 405,865	$ 382,340
Total Capital (to risk-weighted assets), Minimum Capital adequacy with capital buffer, Ratio	9.90%	9.30%
Tier 1 Capital (to risk-weighted assets), Actual Amount	$ 482,515	$ 472,381
Tier 1 Capital (to risk-weighted assets), Actual Ratio	11.80%	11.40%
Tier 1 Capital (to risk-weighted assets), For capital adequacy purposes, Amount	$ 246,391	$ 247,969
Tier 1 Capital (to risk-weighted assets), For capital adequacy purposes, Ratio	6.00%	6.00%
Tier 1 Capital (to risk-weighted assets), Minimum Capital adequacy with capital buffer, Amount	$ 323,593	$ 299,629
Tier 1 Capital (to risk-weighted assets), Minimum Capital adequacy with capital buffer, Ratio	7.90%	7.30%
Tier 1 Capital (to average assets), Actual Amount	$ 482,515	$ 472,381
Tier 1 Capital (to average assets), Actual Ratio	10.70%	10.50%
Tier 1 Capital (to average assets), For capital adequacy purposes, Amount	$ 180,043	$ 180,643
Tier 1 Capital (to average assets), For capital adequacy purposes, Ratio	4.00%	4.00%
Common Equity Tier 1 Capital (to risk-weighted assets), Actual Amount	$ 452,515	$ 442,381
Common Equity Tier 1 Capital (to risk-weighted assets), Actual Ratio	11.00%	10.70%
Common Equity Tier 1 Capital (to risk-weighted assets), For capital adequacy purposes, Amount	$ 184,784	$ 185,874
Common Equity Tier 1 Capital (to risk-weighted assets), For capital adequacy purposes, Ratio	4.50%	4.50%
Common Equity Tier 1 Capital (to risk-weighted assets), Minimum Capital adequacy with capital buffer, Amount	$ 261,982	$ 237,506
Common Equity Tier 1 Capital (to risk-weighted assets), Minimum Capital adequacy with capital buffer, Ratio	6.40%	5.80%
FirstBank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total Capital (to risk-weighted assets), Actual Amount	$ 476,454	$ 466,102
Total Capital (to risk-weighted assets), Actual Ratio	11.60%	11.30%
Total Capital (to risk-weighted assets), For capital adequacy purposes, Amount	$ 328,589	$ 329,984
Total Capital (to risk-weighted assets), For capital adequacy purposes, Ratio	8.00%	8.00%
Total Capital (to risk-weighted assets), Minimum Capital adequacy with capital buffer, Amount	$ 405,807	$ 381,544
Total Capital (to risk-weighted assets), Minimum Capital adequacy with capital buffer, Ratio	9.90%	9.30%
Total Capital (to risk-weighted assets), To be well capitalized under prompt corrective action provisions, Amount	$ 410,736	$ 412,480
Total Capital (to risk-weighted assets), To be well capitalized under prompt corrective action provisions, Ratio	10.00%	10.00%
Tier 1 Capital (to risk-weighted assets), Actual Amount	$ 452,048	$ 442,061
Tier 1 Capital (to risk-weighted assets), Actual Ratio	11.00%	10.70%
Tier 1 Capital (to risk-weighted assets), For capital adequacy purposes, Amount	$ 246,348	$ 247,422
Tier 1 Capital (to risk-weighted assets), For capital adequacy purposes, Ratio	6.00%	6.00%
Tier 1 Capital (to risk-weighted assets), Minimum Capital adequacy with capital buffer, Amount	$ 323,537	$ 298,968
Tier 1 Capital (to risk-weighted assets), Minimum Capital adequacy with capital buffer, Ratio	7.90%	7.30%
Tier 1 Capital (to risk-weighted assets), To be well capitalized under prompt corrective action provisions Amount	$ 246,348	$ 247,422
Tier 1 Capital (to risk-weighted assets), To be well capitalized under prompt corrective action provisions Ratio	6.00%	6.00%
Tier 1 Capital (to average assets), Actual Amount	$ 452,048	$ 442,061
Tier 1 Capital (to average assets), Actual Ratio	10.00%	9.80%
Tier 1 Capital (to average assets), For capital adequacy purposes, Amount	$ 180,819	$ 180,987
Tier 1 Capital (to average assets), For capital adequacy purposes, Ratio	4.00%	4.00%
Tier 1 Capital (to average assets), To be well capitalized under prompt corrective action provisions, Amount	$ 226,024	$ 226,234
Tier 1 Capital (to average assets), To be well capitalized under prompt corrective action provisions, Ratio	5.00%	5.00%
Common Equity Tier 1 Capital (to risk-weighted assets), Actual Amount	$ 452,048	$ 442,061
Common Equity Tier 1 Capital (to risk-weighted assets), Actual Ratio	11.00%	10.70%
Common Equity Tier 1 Capital (to risk-weighted assets), For capital adequacy purposes, Amount	$ 184,761	$ 185,567
Common Equity Tier 1 Capital (to risk-weighted assets), For capital adequacy purposes, Ratio	4.50%	4.50%
Common Equity Tier 1 Capital (to risk-weighted assets), Minimum Capital adequacy with capital buffer, Amount	$ 261,950	$ 237,113
Common Equity Tier 1 Capital (to risk-weighted assets), Minimum Capital adequacy with capital buffer, Ratio	6.40%	5.80%
Common Equity Tier 1 Capital (to risk-weighted assets), To be well capitalized under prompt corrective action provisions, Amount	$ 266,877	$ 268,041
Common Equity Tier 1 Capital (to risk-weighted assets), To be well capitalized under prompt corrective action provisions, Ratio	6.50%	6.50%

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Dec. 31, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Compensation cost related to stock grants and vesting of restricted stock units	$ 1,958	$ 1,352
EBI Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
EBI Units outstanding in equity based incentive plans for employees, units	29,172		67,470
EBI Units outstanding in equity based incentive plans for employees, value	$ 1,184		$ 2,833
Expense related to cash settled EBI	$ 117	$ 298
Restricted Stock Units (RSUs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
EBI Units outstanding in equity based incentive plans for employees, units	1,144,038	1,203,418	1,214,325	1,200,848
Fair value of restricted stock units vested and released	$ 3,614	$ 1,343
Compensation cost related to stock grants and vesting of restricted stock units	1,811	$ 1,352
Compensation cost due to modification of vesting terms of certain grants	249
Unrecognized compensation cost related to nonvested restricted stock units	$ 15,696		$ 12,950
Expected weighted-average period to be recognized	2 years 9 months 10 days		2 years 9 months 18 days
Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Maximum number of shares issuable				200,000
Purchase price percentage of offering period				95.00%
Maximum number of shares per participant				725
Maximum worth of award per participant				$ 25,000
Shares issued under plan	16,537	0
Number of shares reserved for issuance	2,444,428		2,460,965

Stock-Based Compensation - Summ

Stock-Based Compensation - Summary of Vested and Unvested Restricted Stock Units Outstanding (Details) - Restricted Stock Units (RSUs) - $ / shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted Stock Units Outstanding, Balance, beginning of period (unvested)	1,214,325	1,200,848
Restricted Stock Units Outstanding, Grants	105,429	73,801
Restricted Stock Units Outstanding, Released and distributed (vested)	(170,160)	(70,687)
Restricted Stock Units Outstanding, Forfeited/expired	(5,556)	(544)
Restricted Stock Units Outstanding, Balance, end of period (unvested)	1,144,038	1,203,418
Weighted Average Grant Date Fair Value, Balance, beginning of period (unvested)	$ 19.97	$ 19
Weighted Average Grant Date Fair Value, Grants	39.90	33.48
Weighted Average Grant Date Fair Value, Released and distributed (vested)	21.24	19
Weighted Average Grant Date Fair Value, Forfeited/expired	19	19
Weighted Average Grant Date Fair Value, Balance, end of period (unvested)	$ 21.11	$ 19.15

Related Party Transactions - Sc

Related Party Transactions - Schedule of Loans Analysis to Executive Officers, Certain Management, Bank Directors and Their Affiliates (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)
Related Party Transactions [Abstract]
Loans outstanding, Beginning balance	$ 21,012
New loans and advances	1,611
Repayments	(1,537)
Loans outstanding, Ending balance	$ 21,086

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Related Party Transaction [Line Items]
Unfunded commitments	$ 3		$ 2
Deposits from related parties	107,453		110,465
Aviation Time Sharing Agreement
Related Party Transaction [Line Items]
Payments to related party	72	$ 25
Certain Executive Officers and Directors and Their Associates
Related Party Transaction [Line Items]
Unfunded commitments	6,373		4,672
Shareholders
Related Party Transaction [Line Items]
Unamortized leasehold improvements	132		137
Lease expense	148	$ 126
Director
Related Party Transaction [Line Items]
Amount of investment held by the company	$ 183		$ 200