Origin Bancorp (OBK) 10-Q 7 Nov 18 2018 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Nov. 02, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
Trading Symbol	OBNK
Entity Registrant Name	ORIGIN BANCORP, INC.
Entity CIK	1,516,912
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Emerging Growth Company	true
Entity Small Business	false
Entity Ex Transition Period	true
Entity Common Stock, Shares Outstanding		23,621,235

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets
Cash and due from banks	$ 60,716	$ 78,489
Interest-bearing deposits in banks	59,721	108,698
Federal funds sold	20,000	0
Total cash and cash equivalents	140,437	187,187
Securities:
Available for sale	585,788	404,532
Held to maturity ($19,567 and $20,265 at fair value, respectively)	19,602	20,188
Securities carried at fair value through income	11,273	12,033
Total securities	616,663	436,753
Non-marketable equity securities held in other financial institutions	39,283	22,967
Loans held for sale ($20,786 and $32,768 at fair value, respectively)	50,658	65,343
Loans, net of allowance for loan losses of $35,727 and $37,083, respectively ($20,444 and $26,611 at fair value, respectively)	3,565,354	3,203,948
Premises and equipment, net	74,936	77,408
Mortgage servicing rights	26,163	24,182
Cash surrender value of bank-owned life insurance	32,487	27,993
Goodwill and other intangible assets, net	33,228	24,336
Accrued interest receivable and other assets	88,355	83,878
Total assets	4,667,564	4,153,995
Liabilities and Stockholders' Equity
Noninterest-bearing deposits	976,260	832,853
Interest-bearing deposits	1,985,757	2,060,068
Time deposits	765,141	619,093
Total deposits	3,727,158	3,512,014
FHLB advances and other borrowings	358,532	144,357
Junior subordinated debentures	9,637	9,619
Accrued expenses and other liabilities	40,318	32,663
Total liabilities	4,135,645	3,698,653
Commitments and contingencies	0	34,991
Stockholders' equity:
Common stock ($5.00 par value; 50,000,000 shares authorized; 23,621,235 and 19,518,752 shares issued at September 30, 2018, and December 31, 2017, respectively)	118,106	97,594
Additional paid‑in capital	240,832	146,061
Retained earnings	179,178	145,122
Accumulated other comprehensive (loss) income	(6,197)	1,307
Stockholders' equity, before ESOP-owned shares	531,919	455,342
Less: ESOP-owned shares	0	34,991
Total stockholders' equity	531,919	420,351
Total liabilities and stockholders' equity	4,667,564	4,153,995
Preferred Stock Series SBLF
Stockholders' equity:
Preferred stock	0	48,260
Preferred Stock Series D
Stockholders' equity:
Preferred stock	$ 0	$ 16,998

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Securities held to maturity, fair value	$ 19,567	$ 20,265
Loans held for sale at fair value	20,786	32,768
Allowance for loan losses	35,727	37,083
Loans at fair value	$ 20,444	$ 26,611
Preferred stock, shares authorized (in shares)	2,000,000	2,000,000
Common stock, par value ($ per share)	$ 5	$ 5
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	23,621,235	19,518,752
Preferred Stock Series SBLF
Preferred stock, shares authorized (in shares)	0	48,260
Preferred stock, shares issued (in shares)	0	48,260
Preferred Stock Series D
Preferred stock, shares authorized (in shares)	0	950,000
Preferred stock, shares issued (in shares)	0	901,644

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Interest and dividend income
Interest and fees on loans	$ 43,872	$ 36,185	$ 121,565	$ 101,935
Investment securities-taxable	2,754	1,536	6,551	4,614
Investment securities-nontaxable	1,129	1,187	3,469	3,579
Interest and dividend income on assets held in other financial institutions	1,080	706	3,446	2,057
Federal funds sold	7	0	7	0
Total interest and dividend income	48,842	39,614	135,038	112,185
Interest expense
Interest-bearing deposits	7,891	4,995	20,691	13,868
FHLB advances and other borrowings	1,314	612	2,542	1,821
Subordinated debentures	140	139	414	410
Total interest expense	9,345	5,746	23,647	16,099
Net interest income	39,497	33,868	111,391	96,086
Provision (benefit) for credit losses	504	3,327	(709)	8,094
Net interest income after provision (benefit) for credit losses	38,993	30,541	112,100	87,992
Noninterest income
Mortgage banking revenue	2,621	3,895	7,332	12,700
Loss on non-mortgage loans held for sale, net	0	(5,409)	0	(12,708)
Other fee income	364	574	1,219	1,759
Other income	919	1,063	5,604	2,986
Total noninterest income	10,237	5,041	30,652	20,472
Noninterest expense
Salaries and employee benefits	21,054	18,342	59,154	52,647
Occupancy and equipment, net	4,169	4,046	11,615	11,917
Data processing	1,523	1,259	4,343	3,784
Electronic banking	761	235	2,184	1,498
Communications	490	469	1,515	1,435
Advertising and marketing	1,245	651	2,924	1,859
Professional services	982	1,364	2,245	3,555
Regulatory assessments	411	748	1,791	2,128
Loan related expenses	718	993	2,229	2,960
Office and operations	1,499	1,330	4,365	4,105
Litigation settlement	0	10,000	0	10,000
Other expenses	1,492	1,006	3,848	3,015
Total noninterest expense	34,344	40,443	96,213	98,903
Income (loss) before income tax expense (benefit)	14,886	(4,861)	46,539	9,561
Income tax expense (benefit)	2,568	(2,688)	8,112	664
Net income (loss)	12,318	(2,173)	38,427	8,897
Preferred stock dividends	0	1,086	1,923	3,258
Net income allocated to participating stockholders	54	32	945	271
Net income (loss) available to common stockholders	$ 12,264	$ (3,291)	$ 35,559	$ 5,368
Basic earnings (loss) per common share ($ per share)	$ 0.52	$ (0.17)	$ 1.66	$ 0.28
Diluted earnings (loss) per common share ($ per share)	$ 0.52	$ (0.17)	$ 1.64	$ 0.27
Service charges and fees
Noninterest income
Revenue from contracts with customers	$ 3,234	$ 2,919	$ 9,405	$ 8,575
Insurance commission and fee income
Noninterest income
Revenue from contracts with customers	3,306	2,043	7,239	5,788
(Loss) gain on sales and disposals of other assets, net
Noninterest income
Revenue from contracts with customers	$ (207)	$ (44)	$ (147)	$ 1,372

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 12,318	$ (2,173)	$ 38,427	$ 8,897
Securities available for sale and transferred securities:
Net unrealized holding losses arising during the period	(2,755)	(1,486)	(10,134)	(51)
Net losses realized as a yield adjustment in interest on investment securities	(3)	(2)	(8)	(7)
Change in the net unrealized losses on investment securities, before tax		(1,488)	(10,142)	(58)
Income tax benefit related to net unrealized losses arising during the period	(579)	(521)	(2,130)	(21)
Change in the net unrealized loss on investment securities, net of tax	(2,179)	(967)	(8,012)	(37)
Cash flow hedges:
Net unrealized gains (losses) arising during the period	50	9	272	(73)
Reclassification adjustment for losses included in net income	(7)	16	14	73
Change in the net unrealized gain on cash flow hedges, before tax	43	25	286	0
Income tax expense related to net unrealized gains on cash flow hedges	9	9	60	0
Change in the net unrealized gain on cash flow hedges, net of tax	34	16	226	0
Other comprehensive loss, net of tax	(2,145)	(951)	(7,786)	(37)
Comprehensive income (loss)	$ 10,173	$ (3,124)	$ 30,641	$ 8,860

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Preferred Stock Series SBLF	Preferred Stock Series D	Common Stock	Preferred StockPreferred Stock Series SBLF	Preferred StockPreferred Stock Series D	Additional Paid-In Capital	Retained Earnings	Retained EarningsPreferred Stock Series SBLF	Retained EarningsPreferred Stock Series D	Accumulated Other Comprehensive Income (loss)	Less: ESOP-Owned Shares
Common shares outstanding, beginning balance (in shares) at Dec. 31, 2016				19,483,718
Stockholders' equity, beginning balance at Dec. 31, 2016	$ 420,093			$ 97,419	$ 48,260	$ 16,998	$ 145,068	$ 137,449			$ 3,463	$ (28,564)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	8,897							8,897
Other comprehensive income (loss), net of tax	(37)										(37)
Recognition of stock compensation, net (in shares)				15,354
Recognition of stock compensation, net	633			$ 76			557
Net change in ESOP shares	168											168
Dividends declared - preferred stock		$ (3,257)	$ (88)						$ (3,257)	$ (88)
Dividends declared - common stock	(1,901)							(1,901)
Common shares outstanding, ending balance (in shares) at Sep. 30, 2017				19,499,072
Stockholders' equity, ending balance at Sep. 30, 2017	424,508			$ 97,495	48,260	16,998	145,625	141,100			3,426	(28,396)
Common shares outstanding, beginning balance (in shares) at Dec. 31, 2017				19,518,752
Stockholders' equity, beginning balance at Dec. 31, 2017	420,351			$ 97,594	48,260	16,998	146,061	145,122			1,307	(34,991)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	38,427							38,427
Other comprehensive income (loss), net of tax	(7,786)										(7,786)
Reclassification of tax effects related to the adoption of ASU 2018-02 at Dec. 31, 2017	0							(282)			282
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Recognition of stock compensation, net (in shares)				88,589
Recognition of stock compensation, net	844			$ 443			401
Terminated ESOP put option	34,991											34,991
Stock issuance - common (in shares)				3,045,426
Stock issuance - common	94,735			$ 15,227			79,508
Stock issuance - RCF acquisition (in shares)				66,824
Stock issuance - RCF acquisition	2,706			$ 334			2,372
Redemption of preferred stock - Series SBLF	(48,260)				(48,260)
Conversion of preferred stock - Series D to common stock (in shares)				901,644
Conversion of preferred stock - Series D to common stock	0			$ 4,508		(16,998)	12,490
Dividends declared - preferred stock		$ (1,894)	$ (29)						$ (1,894)	$ (29)
Dividends declared - common stock	(2,166)							(2,166)
Common shares outstanding, ending balance (in shares) at Sep. 30, 2018				23,621,235
Stockholders' equity, ending balance at Sep. 30, 2018	$ 531,919			$ 118,106	$ 0	$ 0	$ 240,832	$ 179,178			$ (6,197)	$ 0

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Statement of Stockholders' Equity [Abstract]
Common stock dividends declared ($ per share)	$ 0.0975	$ 0.0975

Consolidated Statement of Cash

Consolidated Statement of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income	$ 38,427	$ 8,897
Adjustments to reconcile net income to net cash provided by operating activities:
Provision (benefit) for credit losses	(709)	8,094
Depreciation and amortization	4,316	4,041
Net amortization on securities	1,079	1,437
Amortization of investments in tax credit funds	1,417	1,487
Deferred income tax expense	4,683	5,945
Stock-based compensation expense	828	758
Originations of mortgage loans held for sale	(233,229)	(380,370)
Proceeds from mortgage loans held for sale	243,153	387,691
Originations of mortgage servicing rights	(1,537)	(2,184)
Net loss (gain) on disposals of premises and equipment	60	(1,454)
Loss on non-mortgage loans held for sale	0	12,708
Increase in the cash surrender value of life insurance	(494)	(471)
Net losses on sales and write downs of other real estate owned	87	82
Net decrease in accrued interest and other assets	(2,424)	(9,429)
Net increase in accrued expenses and other liabilities	4,682	17,998
Other operating activities, net	3,757	(988)
Net cash provided by operating activities	64,096	54,242
Cash flows from investing activities:
Net cash paid in business combinations	(6,447)	0
Purchases of securities available for sale	(450,459)	(318,187)
Maturities, paydowns and calls of securities available for sale	257,983	307,599
Maturities, paydowns and calls of securities held to maturity	585	395
Paydowns of securities carried at fair value	230	204
Net purchases of non-marketable equity securities held in other financial institutions	(14,240)	(5,459)
Paydowns and proceeds from non-mortgage loans held for sale	0	7,250
Originations of mortgage warehouse loans	(3,488,575)	(1,265,686)
Proceeds from pay-offs of mortgage warehouse loans	3,510,293	1,256,543
Net increase in loans, excluding mortgage warehouse and loans held for sale	(383,912)	(153,763)
Purchase of bank-owned life insurance	(4,000)	0
Return of capital on limited partnership investments	336	756
Capital calls on limited partnership investments	(2,838)	(1,666)
Purchases of premises and equipment	(4,202)	(1,702)
Proceeds from sales of premises and equipment	111	4,509
Proceeds from sales of other real estate owned	505	1,294
Net cash used in investing activities	(584,630)	(167,913)
Cash flows from financing activities:
Net increase in deposits	215,144	10,269
Net increase (decrease) in other borrowed funds	219,634	(719)
Net decrease in securities sold under agreements to repurchase	(2,369)	(11,645)
Dividends paid	(5,173)	(5,246)
Taxes paid related to net share settlement of equity awards	(25)	(124)
Cash received from exercise of stock options	98	0
Proceeds from issuance of common stock, net of offering expenses	94,735	0
Redemption of Series SBLF preferred stock	(48,260)	0
Net cash provided by (used in) financing activities	473,784	(7,465)
Net decrease in cash and cash equivalents	(46,750)	(121,136)
Cash and cash equivalents at beginning of period	187,187	259,883
Cash and cash equivalents at end of period	140,437	138,747
Income taxes paid	382	5,298
Significant non-cash transactions:
Real estate acquired in settlement of loans	605	749
Conversion of Series D preferred stock to common stock	16,998	0
Fair value of common stock issued in conjunction with business combination	$ 2,706	$ 0

Significant Accounting Policies

Significant Accounting Policies	9 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Significant Accounting Policies	Note 1 - Significant Accounting Policies Nature of Operations : Origin Bancorp, Inc. (the "Company") is a financial holding company headquartered in Ruston, Louisiana. The Company's wholly owned bank subsidiary, Origin Bank (the "Bank"), provides a broad range of financial services to businesses, municipalities, high net worth individuals and retail clients. The Company currently operates 41 banking centers located in North Louisiana, Central Mississippi, Dallas/Fort Worth and Houston, Texas. The Company principally operates in one business segment, which is community banking. Consolidation : The condensed consolidated financial statements include the accounts of the Company and all other entities in which the Company has a controlling financial interest, including the Bank and Davison Insurance Agency, LLC ("Davison Insurance"), doing business as Thomas & Farr and Reeves, Coon and Funderburg. These condensed consolidated interim financial statements of the Company have been prepared in accordance with U.S. generally accepted accounting principles ("US GAAP") and with the rules and regulations of the Securities and Exchange Commission (the "SEC") for interim financial reporting. Accordingly, they do not include all of the information and footnotes required by US GAAP for complete financial statements. In the opinion of management, all normal and recurring adjustments which are considered necessary to fairly present the results for the interim periods presented have been included. These unaudited statements should be read in conjunction with the consolidated financial statements and notes thereto for the year ended December 31, 2017, included in the Company's prospectus filed with the SEC on May 9, 2018, pursuant to Section 424(b) of the Securities Act of 1933, as amended. Interim results are not necessarily indicative of results for a full year. Certain prior year amounts have been reclassified to conform to the current year financial statement presentations. These changes and reclassifications did not impact previously reported net income or comprehensive income. The Company’s significant accounting policies, including those for loans, impaired loans, non-accrual loans and allowance for loan losses, are described in Note 1 of the Notes to Consolidated Financial Statements in the financial statements for the year ended December 31, 2017, included in the Company's prospectus filed with the SEC on May 9, 2018. There have been no significant changes to these policies since December 31, 2017. Additionally, there were no new accounting policies or changes to existing policies adopted during the first nine months of 2018 that had a significant effect on the Company’s results of operations or financial condition. For interim reporting purposes, the Company follows the same basic accounting policies and considers each interim period as an integral part of an annual period. Use of Estimates : The preparation of financial statements in conformity with US GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Material estimates that are particularly susceptible to change are: the allowance for loan losses; the evaluation of investment securities for other than temporary impairment; fair value measurements of assets and liabilities; and income taxes. Estimates and assumptions are reviewed periodically and the effects of revisions are reflected in the consolidated financial statements in the period they are deemed necessary. While management uses its best judgment, actual results could differ from those estimates. Effect of Recently Adopted Accounting Standards ASU No. 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. The amendments in this update allow a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act. Since these amendments only relate to the reclassification of the income tax effects of the Tax Cuts and Jobs Act, the underlying guidance that requires that the effect of a change in tax laws or rates be included in income from continuing operations is not affected. These amendments require that an entity disclose a description of the accounting policy for releasing income tax effects from accumulated other comprehensive income. These amendments are effective for fiscal years beginning after December 15, 2018, and interim periods within those years. Early adoption is permitted, including adoption in any interim period, for reporting periods for which financial statements have not yet been issued. These amendments should be applied either in the period of adoption or retrospectively to each period in which the effect of the change in the U.S. federal corporate income tax rate in the Tax Cuts and Jobs Act is recognized. Rather than adjusting income tax expense for the differences as the effect of the change in the U.S. federal corporate income tax rates are realized, the Company elected to adjust the difference (stranded tax effect) to retained earnings, consistent with the treatment of the deferred tax adjustment. The Company adopted this guidance during the first quarter of 2018, which resulted in a reclassification of $282,000 from accumulated other comprehensive income to retained earnings. The Company's policy is to release material stranded tax effects on a specific identification basis. ASU No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities. ASU 2017-12 permits hedge accounting for risk components in hedging relationships involving nonfinancial risk and interest rate risk. It also changes the guidance for designating fair value hedges of interest rate risk and for measuring the change in fair value of the hedged item in fair value hedges of interest rate risk. In addition to the amendments to the designation and measurement guidance for qualifying hedging relationships, the amendments in this ASU also align the recognition and presentation of the effects of the hedging instrument and the hedged item in the financial statements. This ASU requires an entity to present the earnings effect of the hedging instrument in the same income statement line item in which the earnings effect of the hedged item is reported. For public entities, these amendments are effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early application is permitted. The Company has analyzed its hedges and determined that the amendments in this ASU are currently not applicable to any hedge relationships in effect and therefore, no transition adjustment is necessary. The Company has adopted this ASU during the first quarter of 2018, and will apply the updates to hedging instruments on a go forward basis. ASU No. 2016-15 —Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. ASU 2016- 15 adds or clarifies guidance on the classification of certain cash receipts and payments in the statement of cash flows. The Company adopted this guidance on January 1, 2018, and, as a result, reclassified $756,000 of the return of capital proceeds from limited partnership investments from operating activities to investing activities for the nine-month period ended September 30, 2017. ASU No. 2016-01 —Financial Instruments —Overall (Subtopic 825-10). The Company adopted this update effective January 1, 2018. The main provisions are to eliminate the available for sale classification of accounting for equity securities and to adjust the fair value disclosures for financial instruments carried at amortized costs such that the disclosed fair values represent an exit price as opposed to an entry price. The majority of the Company's equity investments qualify for the practical expedient allowed for equity securities without a readily determinable fair value, such that the Company has elected to carry these securities at cost adjusted for any observable transactions during the period, less any impairment. To date, no impairment has been recorded on the Company's investments in equity securities which do not have readily determinable fair values. The disclosure of fair value of the loan and interest-bearing deposit portfolios has been presented using an exit price methodology and had an immaterial impact on the Company's financial position. ASU No. 2014-09 — On January 1, 2018, the Company adopted ASU No. 2014-09, " Revenue from Contracts with Customers " ( Topic 606 ), which outlines a single comprehensive revenue recognition model for entities to follow in accounting for revenue from contracts with customers. The implementation of this new guidance did not have a material impact on the measurement or recognition of revenue and no cumulative effect adjustment was recorded to opening retained earnings. Results for reporting periods beginning after January 1, 2018, are presented under Topic 606, while prior period amounts were not adjusted and continue to be reported in accordance with the Company's historic accounting under Topic 605. The majority of the Company's revenue is generated from sources outside the scope of Topic 606. Interest and fees on loans, income from investment securities and mortgage banking revenue are all outside the scope of Topic 606 and are recorded in adherence with US GAAP. Service charges and fees on deposit accounts, credit card interchange insurance commission and fee income, as well as gains and losses on the sale of other assets including other real estate owned (“OREO”) are within the scope of Topic 606; however, the recognition of these revenue streams did not change significantly upon adoption of Topic 606. Descriptions of the Company's revenue generating activities that are within the scope of Topic 606 are described below. Service charges and fees on deposit accounts Service charges and fees on deposit accounts are primarily comprised of maintenance fees, service fees, stop payment and non-sufficient funds fees. The Company's performance obligation for service fees or other fees covering a period of time are generally satisfied, and related revenue recognized, over the period in which the service is provided. The Company's performance obligation for transactional-based fees are generally satisfied, and related revenue recognized, at a point in time. Insurance commission and fee income The Company earns commission income through production on behalf of insurance carriers and also earns fee income by providing complementary services such as collection of premiums. In most instances the Company considers the performance obligation to be complete at the time the service was rendered. Credit card interchange income The Company records credit card interchange income at a point in time as card transactions occur. The Company's performance obligation for these transactions is deemed to have occurred upon completion of each transaction. The amounts are included as a component of other income in the consolidated statements of income. Gain or loss on sale of other assets and OREO In the normal course of business, the Company recognizes the sale on other assets and OREO, along with any gain or loss, when control of the property transfers to the buyer through an executed contractual agreement. The transaction price is fixed, and on occasion the Company will finance a portion of the purchase price of the transferred asset. Effect of Newly Issued But Not Yet Effective Accounting Standards ASU No. 2018-15, Intangibles, Goodwill and Other, Internal Use Software - (Topic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract. The amendments in this ASU align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). Accordingly, the amendments require an entity (customer) in a hosting arrangement that is a service contract to follow the guidance in Subtopic 350-40 to determine which implementation costs to capitalize as an asset related to the service contract and which costs to expense. The amendments also require the entity (customer) to expense the capitalized implementation costs of a hosting arrangement that is a service contract over the term of the hosting arrangement, which includes reasonably certain renewals. For public business entities that are SEC filers, the amendments in the update are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. There is no expected impact to the consolidated financial statements or disclosures associated with the adoption of this ASU. ASU No. 2018-13, Fair Value Measurement - (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement. The amendments in this ASU modify the disclosure requirements on fair value measurements in Topic 820, Fair Value Measurement, based on the concepts in FASB Concepts Statement, Conceptual Framework for Financial Reporting—Chapter 8: Notes to Financial Statements, including the consideration of costs and benefits. For public business entities that are SEC filers, the amendments in the update are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company is evaluating the impact of this ASU on the consolidated financial statements and disclosures. ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. ASU 2016-13 amends guidance on reporting credit losses for assets held at amortized cost basis and available for sale debt securities. For assets held at amortized cost basis, Topic 326 eliminates the probable initial recognition threshold in current GAAP and, instead, requires an entity to reflect its current estimate of all expected credit losses. The allowance for credit losses is a valuation account that is deducted from the amortized cost basis of the financial assets to present the net amount expected to be collected. For available for sale debt securities, credit losses should be measured in a manner similar to current GAAP, however Topic 326 will require that credit losses be presented as an allowance rather than as a write-down. This ASU affects entities holding financial assets and net investment in leases that are not accounted for at fair value through net income. The amendments affect loans, debt securities, trade receivables, net investments in leases, off-balance sheet credit exposures, reinsurance receivables, and any other financial assets not excluded from the scope that have the contractual right to receive cash. The Company anticipates a significant change in the processes and procedures to calculate the loan losses, including changes in assumptions and estimates to consider expected credit losses over the life of the loan versus the current accounting practice that utilizes the incurred loss model. The Company expects to recognize a one-time cumulative effect adjustment to the allowance for loan losses at the beginning of the first reporting period in which the new standard is effective, but cannot yet determine the magnitude of any such one-time adjustment or the overall impact on our results of operations, financial position or disclosures. However, the Company has begun developing processes and procedures to ensure the Company is fully compliant at the required adoption date. Among other things, the Company has initiated data gathering and assessment to support forecasting of asset quality, loan balances, and portfolio net charge-offs and developing asset quality forecast models in preparation for the implementation of this standard. For public business entities that are SEC filers, the amendments in the update are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company continues to evaluate the impact of this ASU on the consolidated financial statements and disclosures. ASU No. 2016-02, Leases (Topic 842). ASU 2016-02 requires lessees to put most leases on their balance sheets but recognize expenses in the income statement in a manner similar to current accounting treatment. This ASU changes the guidance on sale-leaseback transactions, initial direct costs and lease execution costs, and, for lessors, modifies the classification criteria and the accounting for sales-type and direct financing leases. For public business entities, this ASU is effective for annual periods beginning after December 15, 2018, and interim periods therein. ASU No. 2018-11, Leases (Topic 842), Targeted Improvements allows entities with an additional (and optional) transition method to adopt the new lease requirements by allowing them to initially apply the requirements by recognizing a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. The Company expects to make use of this transition option guidance and is currently finalizing the review of key assumptions, including the discount rate used to quantify the valuation of the asset and liability, which is based upon the current interest rate environment and may differ at the time of adoption of the ASU. Based on preliminary evaluation, the overall impact to the balance sheet reflected in the right-of-use asset and corresponding lease obligation liability are expected to range between $19.0 million and $21.0 million at adoption. The Company will continue to evaluate other impacts of adoption but does not anticipate these to be significant.

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Earnings Per Share	Note 2 - Earnings Per Share Three months ended September 30, Nine months ended September 30, (Dollars in thousands, except per share amounts) 2018 2017 2018 2017 Basic earnings per common share Net income (loss) $ 12,318 $ (2,173 ) $ 38,427 $ 8,897 Less: Dividends to preferred stock — 1,086 1,923 3,258 Net income allocated to participating stockholders (1) (2) 54 32 945 271 Net income (loss) available to common stockholders $ 12,264 $ (3,291 ) $ 35,559 $ 5,368 Weighted average common shares outstanding 23,493,065 19,418,280 21,476,801 19,411,745 Basic earnings (loss) per common share $ 0.52 $ (0.17 ) $ 1.66 $ 0.28 Diluted earnings per common share Diluted earnings (loss) applicable to common stockholders (3) $ 12,300 $ (3,291 ) $ 35,653 $ 5,381 Weighted average diluted common shares outstanding: Weighted average common shares outstanding 23,493,065 19,418,280 21,476,801 19,411,745 Dilutive effect of common stock options (4) 223,714 — 223,714 221,998 Weighted average diluted common shares outstanding 23,716,779 19,418,280 21,700,515 19,633,743 Diluted earnings (loss) per common share $ 0.52 $ (0.17 ) $ 1.64 $ 0.27 ____________________________ (1) Participating stockholders include those that hold certain share-based payment awards that contain nonforfeitable rights to dividends or dividend equivalents. Such shares or units are considered participating securities (i.e., nonvested restricted stock grants). Additionally, for periods prior to June, 30, 2018, Series D preferred stockholders were participating stockholders as those shares participated in dividends with common shares on a one-for-one basis. Net income allocated to participating stockholders does not include dividends paid to preferred stockholders. (2) The average participating share count for the September 30, 2018, year-to-date earnings per share calculation includes an allocation for Series D preferred stockholders. Series D preferred stock was not outstanding during the quarter ended September 30, 2018, and therefore no allocation was made for it during the quarter. (3) Net income allocated to common stockholders for basic and diluted earnings per share may differ under the two-class method as a result of adding common stock equivalents for options to dilutive shares outstanding, which alters the ratio used to allocate earnings to common stockholders and participating securities for the purposes of calculating diluted earnings per share. (4) There was no dilutive effect of common stock options for the third quarter of 2017 due to the anti-dilutive effect on the calculation of diluted loss per common share.

Business Combinations

Business Combinations	9 Months Ended
	Sep. 30, 2018
Business Combinations [Abstract]
Business Combinations	Note 3 - Business Combinations All acquisitions are accounted for using the acquisition method of accounting. Accordingly, the assets and liabilities of the acquired entities were recorded at their estimated fair values at the acquisition date. ASC 820 defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market willing participants at the measurement date. The Company determines the estimated fair values after review and consideration of relevant information, including discounted cash flows, quoted market prices, third party valuations, and estimates made by management. Purchase price allocations on completed acquisitions may be modified through the measurement period which cannot exceed one year from the acquisition date. The excess of the purchase price over the estimated fair value of the net assets for tax-free acquisitions is recorded as goodwill, none of which is deductible for tax purposes. Acquisition-related costs are recognized separately from the acquisition and are expensed as incurred. The results of operations for the acquisition described below have been included in the Company’s consolidated financial results beginning on the acquisition date. Reeves, Coon & Funderburg On July 1, 2018, the Company acquired certain assets and assumed certain liabilities of Reeves, Coon & Funderburg, ("RCF"), a Louisiana-based independent insurance agency offering commercial, personal, health and life insurance. Total consideration was $9.5 million , which was comprised of 66,824 shares of its common stock at a price of $40.50 per share, based upon the closing stock price on June 28, 2018, and $6.8 million in cash. As the consideration paid for RCF exceeded the provisional value of the tangible net assets acquired, goodwill of $4.5 million and identifiable intangible assets valued at $4.9 million associated primarily with RCF's customer relationships were recorded related to the acquisition. This goodwill resulted from the combination of expected operational synergies and increased market share.

Securities

Securities	9 Months Ended
	Sep. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Securities	Note 4 - Securities The following table is a summary of the amortized cost and estimated fair value, including gross unrealized gains and losses, of available for sale, held to maturity and securities carried at fair value through income for the dates indicated: (Dollars in thousands) Amortized Gross Gross Unrealized Losses Fair September 30, 2018 Available for sale: State and municipal securities $ 119,570 $ 2,292 $ (314 ) $ 121,548 Corporate bonds 3,000 80 — 3,080 U.S. Government and agency securities 60,414 — (117 ) 60,297 Commercial mortgage-backed securities 14,439 — (71 ) 14,368 Residential mortgage-backed securities 180,867 55 (3,735 ) 177,187 Residential collateralized mortgage obligations 215,787 18 (6,497 ) 209,308 Total $ 594,077 $ 2,445 $ (10,734 ) $ 585,788 Held to maturity: State and municipal securities $ 19,602 $ — $ (35 ) $ 19,567 Securities carried at fair value through income: State and municipal securities (1) $ 11,688 $ — $ — $ 11,273 December 31, 2017 Available for sale: State and municipal securities $ 125,909 $ 4,104 $ (35 ) $ 129,978 Corporate bonds 3,000 136 — 3,136 Residential mortgage-backed securities 105,132 492 (595 ) 105,029 Residential collateralized mortgage obligations 168,645 262 (2,518 ) 166,389 Total $ 402,686 $ 4,994 $ (3,148 ) $ 404,532 Held to maturity: State and municipal securities $ 20,188 $ 77 $ — $ 20,265 Securities carried at fair value through income: State and municipal securities (1) $ 11,918 $ — $ — $ 12,033 ____________________________ (1) Securities carried at fair value through income have no unrealized gains or losses at the balance sheet date as all changes in value have been recognized in the consolidated statements of income. See Note 6 - Fair Value of Financial Instruments for more information. Securities with unrealized losses at September 30, 2018 , and December 31, 2017 , aggregated by investment category and those individual securities that have been in a continuous unrealized loss position under and over 12 months were as follows: (Dollars in thousands) Less than 12 Months 12 Months or More Total September 30, 2018 Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss Available for sale: State and municipal securities $ 23,114 $ (258 ) $ 1,517 $ (56 ) $ 24,631 $ (314 ) U.S. Government and agency securities 60,283 (117 ) — — 60,283 (117 ) Commercial mortgage-backed securities 14,368 (71 ) — — 14,368 (71 ) Residential mortgage-backed securities 118,323 (1,742 ) 44,059 (1,993 ) 162,382 (3,735 ) Residential collateralized mortgage obligations 115,173 (1,908 ) 91,506 (4,589 ) 206,679 (6,497 ) Total $ 331,261 $ (4,096 ) $ 137,082 $ (6,638 ) $ 468,343 $ (10,734 ) Held to maturity: State and municipal securities $ 14,349 $ (35 ) $ — $ — $ 14,349 $ (35 ) December 31, 2017 Available for sale: State and municipal securities $ 2,114 $ (5 ) $ 1,210 $ (30 ) $ 3,324 $ (35 ) Residential mortgage-backed securities 46,018 (198 ) 20,233 (397 ) 66,251 (595 ) Residential collateralized mortgage obligations 70,788 (641 ) 60,622 (1,877 ) 131,410 (2,518 ) Total $ 118,920 $ (844 ) $ 82,065 $ (2,304 ) $ 200,985 $ (3,148 ) At September 30, 2018 , the Company had 173 individual securities that were in an unrealized loss position. The unrealized losses for each of the securities relate to market interest rate changes. The Company has considered the current market for the securities in an unrealized loss position, as well as the severity and duration of the impairments, and expects that the value will recover. Management does not intend to sell these investments until the fair value exceeds amortized cost and it is more likely than not that the Company will not be required to sell debt securities before the anticipated recovery of the amortized cost basis of the security; thus, the impairment is determined not to be other-than-temporary. The following table presents the amortized cost and fair value of securities available for sale and held to maturity at September 30, 2018 , grouped by contractual maturity. Mortgage-backed securities and collateralized mortgage obligations, which do not have contractual payments due at a single maturity date, are shown separately. Actual maturities for mortgage-backed securities and collateralized mortgage obligations will differ from contractual maturities as a result of prepayments made on the underlying mortgages. (Dollars in thousands) Held to maturity Available for sale September 30, 2018 Amortized Cost Fair Value Amortized Cost Fair Value Due in one year or less $ — $ — $ 58,119 $ 58,069 Due after one year through five years 14,384 14,349 28,088 28,396 Due after five years through ten years — — 85,875 87,421 Due after ten years 5,218 5,218 10,902 11,039 Commercial mortgage-backed securities — — 14,439 14,368 Residential mortgage-backed securities — — 180,867 177,187 Residential collateralized mortgage obligations — — 215,787 209,308 Total $ 19,602 $ 19,567 $ 594,077 $ 585,788 The following table presents carrying amounts of securities pledged as collateral for deposits and repurchase agreements for the period ends presented. (Dollars in thousands) September 30, 2018 December 31, 2017 Carrying value of securities pledged to secure public deposits $ 325,897 $ 276,319 Carrying value of securities pledged to repurchase agreements 38,631 36,685

Loans

Loans	9 Months Ended
	Sep. 30, 2018
Receivables [Abstract]
Loans	Note 5 - Loans Loans consist of the following: (Dollars in thousands) September 30, 2018 December 31, 2017 Loans held for sale $ 50,658 $ 65,343 Loans held for investment: Loans secured by real estate: Commercial real estate $ 1,162,274 $ 1,083,275 Construction/land/land development 406,249 322,404 Residential real estate 585,931 570,583 Total real estate 2,154,454 1,976,262 Commercial and industrial 1,193,035 989,220 Mortgage warehouse lines of credit 233,325 255,044 Consumer 20,267 20,505 Total loans held for investment (1) 3,601,081 3,241,031 Less: Allowance for loan losses 35,727 37,083 Net loans held for investment $ 3,565,354 $ 3,203,948 ____________________________ (1) Includes net deferred loan fees of $2.9 million and $1.0 million at September 30, 2018 , and December 31, 2017 , respectively. Included in total loans held for investment as of September 30, 2018, were $19.7 million and $739,000 of commercial real estate loans and commercial and industrial loans, respectively, for which the fair value option was elected as of that date. At December 31, 2017 , the Company held $21.0 million and $5.6 million of commercial real estate loans and commercial and industrial loans, respectively, at fair value. The Company mitigates the interest rate component of fair value risk on loans at fair value by entering into derivative interest rate contracts. See Note 6 - Fair Value of Financial Instruments for more information on loans for which the fair value option has been elected. Credit quality indicators . As part of the Company's commitment to manage the credit quality of its loan portfolio, management annually updates and evaluates certain credit quality indicators, which include but are not limited to (i) weighted-average risk rating of the loan portfolio, (ii) net charge-offs, (iii) level of non-performing loans, (iv) level of classified loans, and (v) the general economic conditions in the states in which the Company operates. The Company maintains an internal risk rating system where ratings are assigned to individual loans based on assessed risk. Loan risk ratings are the primary indicator of credit quality for the loan portfolio and are continually evaluated to ensure they are appropriate based on currently available information. The following is a summary description of the Company's internal risk ratings: • Pass (1-6) Loans within this risk rating are further categorized as follows: Minimal risk (1) Well-collateralized by cash equivalent instruments held by the Bank. Moderate risk (2) Borrowers with excellent asset quality and liquidity. Borrowers' capitalization and liquidity exceed industry norms. Borrowers in this category have significant levels of liquid assets and have a low level of leverage. Better than average risk (3) Borrowers with strong financial strength and excellent liquidity that consistently demonstrate strong operating performance. Borrowers in this category generally have a sizable net worth that can be converted into liquid assets within 12 months. Average risk (4) Borrowers with sound credit quality and financial performance, including liquidity. Borrowers are supported by sufficient cash flow coverage generated through operations across the full business cycle. Marginally acceptable risk (5) Loans generally meet minimum requirements for an acceptable loan in accordance with lending policy, but possess one or more attributes that cause the overall risk profile to be higher than the majority of newly approved loans. Watch (6) A passing loan with one or more factors that identify a potential weakness in the overall ability of the borrower to repay the loan. These weaknesses are generally mitigated by other factors that reduce the risk of delinquency or loss. • Special Mention (7) This grade is intended to be temporary and includes borrowers whose credit quality have deteriorated and is at risk of further decline. • Substandard (8) This grade includes "Substandard" loans, in accordance with regulatory guidelines. Substandard loans exhibit a well-defined weakness that jeopardizes debt repayment in accordance with contractual agreements, even though the loan may be performing. These obligations are characterized by the distinct possibility that a loss may be incurred if these weaknesses are not corrected and repayment may be dependent upon collateral liquidation or secondary source of repayment. • Doubtful (9) This grade includes "Doubtful" loans, in accordance with regulatory guidelines. Such loans are placed on nonaccrual status and repayment may be dependent upon collateral with no readily determinable valuation or valuations that are highly subjective in nature. Repayment for these loans is considered improbable based on currently existing facts and circumstances. • Loss (0) This grade includes "Loss" loans in accordance with regulatory guidelines. Loss loans are charged-off or written-down when repayment is not expected. The recorded investment in loans by credit quality indicator at September 30, 2018 , and December 31, 2017 , excluding loans held for sale, were as follows: September 30, 2018 (Dollars in thousands) Pass Special Mention Substandard Doubtful Loss Total Loans secured by real estate: Commercial real estate $ 1,139,571 $ 8,440 $ 14,263 $ — $ — $ 1,162,274 Construction/land/land development 403,159 160 2,930 — — 406,249 Residential real estate 574,728 28 11,175 — — 585,931 Total real estate 2,117,458 8,628 28,368 — — 2,154,454 Commercial and industrial 1,112,473 32,050 48,512 — — 1,193,035 Mortgage warehouse lines of credit 233,325 — — — — 233,325 Consumer 20,028 — 239 — — 20,267 Total loans held for investment $ 3,483,284 $ 40,678 $ 77,119 $ — $ — $ 3,601,081 December 31, 2017 (Dollars in thousands) Pass Special Mention Substandard Doubtful Loss Total Loans secured by real estate: Commercial real estate $ 1,055,911 $ 7,798 $ 19,566 $ — $ — $ 1,083,275 Construction/land/land development 318,488 170 3,746 — — 322,404 Residential real estate 560,945 778 8,860 — — 570,583 Total real estate 1,935,344 8,746 32,172 — — 1,976,262 Commercial and industrial 915,111 15,332 58,777 — — 989,220 Mortgage warehouse lines of credit 255,044 — — — — 255,044 Consumer 20,223 — 279 3 — 20,505 Total loans held for investment $ 3,125,722 $ 24,078 $ 91,228 $ 3 $ — $ 3,241,031 The following tables present the Company’s loan portfolio aging analysis at the dates indicated: September 30, 2018 (Dollars in thousands) 30-59 Days past due 60-89 Days past due Loans past due 90 days or more Total past due Current loans Total loans receivable Accruing loans 90 or more days past due Loans secured by real estate: Commercial real estate $ 414 $ 7,512 $ 976 $ 8,902 $ 1,153,372 $ 1,162,274 $ — Construction/land/land development 25 — 465 490 405,759 406,249 — Residential real estate 2,507 196 3,621 6,324 579,607 585,931 — Total real estate 2,946 7,708 5,062 15,716 2,138,738 2,154,454 — Commercial and industrial 434 738 7,842 9,014 1,184,021 1,193,035 — Mortgage warehouse lines of credit — — — — 233,325 233,325 — Consumer 81 35 — 116 20,151 20,267 — Total loans held for investment $ 3,461 $ 8,481 $ 12,904 $ 24,846 $ 3,576,235 $ 3,601,081 $ — December 31, 2017 (Dollars in thousands) 30-59 Days past due 60-89 Days past due Loans past due 90 days or more Total past due Current loans Total loans receivable Accruing loans 90 or more days past due Loans secured by real estate: Commercial real estate $ 8,427 $ 2,791 $ 1,150 $ 12,368 $ 1,070,907 $ 1,083,275 $ — Construction/land/land development 1,488 172 464 2,124 320,280 322,404 — Residential real estate 2,630 347 3,910 6,887 563,696 570,583 — Total real estate 12,545 3,310 5,524 21,379 1,954,883 1,976,262 — Commercial and industrial 1,517 9,922 8,074 19,513 969,707 989,220 — Mortgage warehouse lines of credit — — — — 255,044 255,044 — Consumer 178 128 74 380 20,125 20,505 — Total loans held for investment $ 14,240 $ 13,360 $ 13,672 $ 41,272 $ 3,199,759 $ 3,241,031 $ — The following tables detail activity in the allowance for loan losses by portfolio segment. Allocation of a portion of the allowance to one category of loans does not preclude its availability to absorb losses in other categories. Three months ended September 30, 2018 (Dollars in thousands) Beginning balance Charge-offs Recoveries Provision (Benefit) (1) Ending balance Loans secured by real estate: Commercial real estate $ 9,768 $ 42 $ 7 $ (4 ) $ 9,729 Construction/land/land development 3,153 228 5 238 3,168 Residential real estate 5,468 398 68 206 5,344 Commercial and industrial 15,299 290 1,370 606 16,985 Mortgage warehouse lines of credit 203 — — 65 268 Consumer 260 51 22 2 233 Total $ 34,151 $ 1,009 $ 1,472 $ 1,113 $ 35,727 ____________________________ (1) The $504,000 provision for credit losses on the consolidated statements of income includes a $1.1 million net loan loss provision and a $609,000 release of provision for off-balance sheet commitments for the three months ended September 30, 2018 . Nine months ended September 30, 2018 (Dollars in thousands) Beginning balance Charge-offs Recoveries Provision (Benefit) (1) Ending balance Loans secured by real estate: Commercial real estate $ 8,998 $ 51 $ 223 $ 559 $ 9,729 Construction/land/land development 2,950 228 6 440 3,168 Residential real estate 5,807 407 117 (173 ) 5,344 Commercial and industrial 18,831 2,759 2,090 (1,177 ) 16,985 Mortgage warehouse lines of credit 214 — — 54 268 Consumer 283 96 54 (8 ) 233 Total $ 37,083 $ 3,541 $ 2,490 $ (305 ) $ 35,727 ____________________________ (1) The $709,000 benefit for credit losses on the consolidated statements of income includes a $305,000 net loan loss benefit and a $404,000 release of provision for off-balance sheet commitments for the nine months ended September 30, 2018 . Three months ended September 30, 2017 (Dollars in thousands) Beginning balance Charge-offs Recoveries Provision (Benefit) (1) Ending balance Loans secured by real estate: Commercial real estate $ 9,201 $ 272 $ 12 $ 133 $ 9,074 Construction/land/land development 3,086 — 1 346 3,433 Residential real estate 7,363 1,306 21 (176 ) 5,902 Commercial and industrial 21,347 4,629 271 3,532 20,521 Mortgage warehouse lines of credit 303 — — (79 ) 224 Consumer 334 89 26 20 291 Total $ 41,634 $ 6,296 $ 331 $ 3,776 $ 39,445 ____________________________ (1) The $3.3 million provision for credit losses on the consolidated statements of income includes a $3.8 million net loan loss provision offset by a $449,000 release of provision for off-balance sheet commitments for the three months ended September 30, 2017 . Nine months ended September 30, 2017 (Dollars in thousands) Beginning balance Charge-offs Recoveries Provision (1) Ending balance Loans secured by real estate: Commercial real estate $ 8,718 $ 272 $ 88 $ 540 $ 9,074 Construction/land/land development 2,805 — 4 624 3,433 Residential real estate 5,003 1,326 98 2,127 5,902 Commercial and industrial 33,590 17,962 670 4,223 20,521 Mortgage warehouse lines of credit 139 — — 85 224 Consumer 276 137 36 116 291 Total $ 50,531 $ 19,697 $ 896 $ 7,715 $ 39,445 ____________________________ (1) The $8.1 million provision for credit losses on the consolidated statements of income includes a $7.7 million net loan loss provision and an $379,000 provision for off-balance sheet commitments for the nine months ended September 30, 2017 . The following tables present the balance of loans receivable by method of impairment evaluation at the dates indicated: September 30, 2018 (Dollars in thousands) Period end allowance allocated to loans individually evaluated for impairment Period end allowance allocated to loans collectively evaluated for impairment Period end loan balance individually evaluated for impairment Period end loan balance collectively evaluated for impairment (1) Loans secured by real estate: Commercial real estate $ 1,193 $ 8,536 $ 10,078 $ 1,132,491 Construction/land/land development 19 3,149 1,044 405,205 Residential real estate 70 5,274 7,558 578,373 Commercial and industrial 2,029 14,956 13,381 1,178,915 Mortgage warehouse lines of credit — 268 — 233,325 Consumer 23 210 230 20,037 Total $ 3,334 $ 32,393 $ 32,291 $ 3,548,346 ____________________________ (1) Excludes $19.7 million and $739,000 of commercial real estate loans and commercial and industrial loans, respectively, at fair value, which are not evaluated for impairment due to the fair value option election. See Note 6 - Fair Value of Financial Instruments for more information. December 31, 2017 (Dollars in thousands) Period end allowance allocated to loans individually evaluated for impairment Period end allowance allocated to loans collectively evaluated for impairment Period end loan balance individually evaluated for impairment Period end loan balance collectively evaluated for impairment (1) Loans secured by real estate: Commercial real estate $ 312 $ 8,686 $ 4,945 $ 1,057,330 Construction/land/land development 4 2,946 1,963 320,441 Residential real estate 72 5,735 7,915 562,668 Commercial and industrial 4,356 14,475 24,598 959,011 Mortgage warehouse lines of credit — 214 — 255,044 Consumer 63 220 237 20,268 Total $ 4,807 $ 32,276 $ 39,658 $ 3,174,762 ____________________________ (1) Excludes $21.0 million and $5.6 million of commercial real estate loans and commercial and industrial loans, respectively, at fair value, which are not evaluated for impairment due to the fair value option election. See Note 6 - Fair Value of Financial Instruments for more information. The following tables present impaired loans at the dates indicated. No mortgage warehouse lines of credit were impaired at either September 30, 2018 , or December 31, 2017 . September 30, 2018 (Dollars in thousands) Unpaid contractual principal balance Recorded investment with no allowance Recorded investment with an allowance Total recorded investment Allocation of allowance for loan losses Loans secured by real estate: Commercial real estate $ 10,950 $ 2,304 $ 7,774 $ 10,078 $ 1,193 Construction/land/land development 1,344 737 307 1,044 19 Residential real estate 8,533 6,626 932 7,558 70 Total real estate 20,827 9,667 9,013 18,680 1,282 Commercial and industrial 13,894 5,541 7,840 13,381 2,029 Consumer 251 — 230 230 23 Total impaired loans $ 34,972 $ 15,208 $ 17,083 $ 32,291 $ 3,334 December 31, 2017 (Dollars in thousands) Unpaid contractual principal balance Recorded investment with no allowance Recorded investment with an allowance Total recorded investment Allocation of allowance for loan losses Loans secured by real estate: Commercial real estate $ 6,047 $ 1,782 $ 3,163 $ 4,945 $ 312 Construction/land/land development 2,268 1,813 150 1,963 4 Residential real estate 10,024 6,750 1,165 7,915 72 Total real estate 18,339 10,345 4,478 14,823 388 Commercial and industrial 25,212 6,161 18,437 24,598 4,356 Consumer 259 141 96 237 63 Total impaired loans $ 43,810 $ 16,647 $ 23,011 $ 39,658 $ 4,807 The average recorded investment and interest recognized on impaired loans while classified as impaired for the three and nine months ended September 30, 2018 and 2017 , were as follows: Three months ended September 30, 2018 2017 (Dollars in thousands) Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized Loans secured by real estate: Commercial real estate $ 10,070 $ 14 $ 6,894 $ 41 Construction/land/land development 1,228 2 846 2 Residential real estate 7,741 12 9,439 16 Total real estate 19,039 28 17,179 59 Commercial and industrial 12,891 54 30,545 95 Consumer 263 1 253 2 Total impaired loans $ 32,193 $ 83 $ 47,977 $ 156 Nine months ended September 30, 2018 2017 (Dollars in thousands) Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized Loans secured by real estate: Commercial real estate $ 9,983 $ 57 $ 7,454 $ 127 Construction/land/land development 1,515 14 924 7 Residential real estate 7,631 48 9,777 57 Total real estate 19,129 119 18,155 191 Commercial and industrial 14,932 158 45,536 250 Consumer 264 4 242 5 Total impaired loans $ 34,325 $ 281 $ 63,933 $ 446 All interest accrued but not received for loans placed on nonaccrual status is reversed against interest income. Subsequent receipts on nonaccrual loans are recorded as a reduction of principal, and interest income is recorded only after principal recovery is reasonably assured. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured. Troubled debt restructurings ("TDRs") are included in certain loan categories within impaired loans. At September 30, 2018 , the Company has committed to advance $15,000 in connection with impaired loans. Non-performing (nonaccrual) loans held for investment were as follows: (Dollars in thousands) September 30, 2018 December 31, 2017 Loans secured by real estate: Commercial real estate $ 8,851 $ 1,745 Construction/land/land development 960 1,097 Residential real estate 7,220 7,166 Total real estate 17,031 10,008 Commercial and industrial 9,285 13,512 Consumer 238 282 Total nonaccrual loans $ 26,554 $ 23,802 For the nine months ended September 30, 2018 and 2017 , gross interest income which would have been recorded had the nonaccruing loans been current in accordance with their original terms was $997,000 and $2.4 million, respectively. No interest income was recorded on these loans while they were considered nonaccrual during the nine months ended September 30, 2018 or 2017 . The Company elects the fair value option for recording residential mortgage loans held for sale, as well as certain commercial real estate and commercial and industrial loans, in accordance with US GAAP. The Company had $1.4 million of nonaccrual mortgage loans held for sale that were recorded using the fair value option election at September 30, 2018 , and zero at December 31, 2017 . There were no nonaccrual loans held for investment that were recorded using the fair value option election at September 30, 2018, or December 31, 2017. The following is a summary of loans classified as TDRs. (Dollars in thousands) September 30, 2018 December 31, 2017 TDRs Nonaccrual TDRs $ 2,040 $ 2,622 Performing TDRs 5,862 14,234 Total $ 7,902 $ 16,856 The following table presents the pre-modification balance of TDR modifications that occurred during the three and nine months ended September 30, 2018 , and September 30, 2017 , and the ending balances by concession type as of each period presented. At and for the three months ended September 30, 2018 (Dollars in thousands) Number of loans restructured Pre-modification recorded balance Term Concessions Interest Rate Concessions Combination Total Modifications Loans secured by real estate: Commercial real estate 1 $ 252 $ 150 $ — $ — $ 150 Commercial and industrial 3 199 182 — 15 197 Total 4 $ 451 $ 332 $ — $ 15 $ 347 At and for the nine months ended September 30, 2018 (Dollars in thousands) Number of loans restructured Pre-modification recorded balance Term Concessions Interest Rate Concessions Combination Total Modifications Loans secured by real estate: Commercial real estate 1 $ 252 $ 150 $ — $ — $ 150 Residential real estate 5 187 49 21 102 172 Total real estate 6 439 199 21 102 322 Commercial and industrial 3 198 182 — 15 197 Consumer 1 33 — — 31 31 Total 10 $ 670 $ 381 $ 21 $ 148 $ 550 At and for the three months ended September 30, 2017 (Dollars in thousands) Number of loans restructured Pre-modification recorded balance Term Concessions Interest Rate Concessions Combination Total Modifications Loans secured by real estate: Commercial real estate — $ — $ — $ — $ — $ — Residential real estate 2 130 40 — 206 246 Total real estate 2 130 40 — 206 246 Commercial and industrial 1 42 — — 44 44 Consumer 1 49 47 — — 47 Total 4 $ 221 $ 87 $ — $ 250 $ 337 At and for the nine months ended September 30, 2017 (Dollars in thousands) Number of loans restructured Pre-modification recorded balance Term Concessions Interest Rate Concessions Combination Total Modifications Loans secured by real estate: Commercial real estate 3 $ 2,643 $ 2,001 $ — $ — $ 2,001 Residential real estate 4 171 79 — 206 285 Total real estate 7 2,814 2,080 — 206 2,286 Commercial and industrial 7 8,295 7,392 — 44 7,436 Consumer 1 49 47 — — 47 Total 15 $ 11,158 $ 9,519 $ — $ 250 $ 9,769 During the nine months ended September 30, 2018 , one loan with an outstanding principal balance of $26,000 defaulted after having been modified as a TDR within the previous 12 months. During the nine months ended September 30, 2017, there were no payment defaults for loans restructured as TDR's within the previous 12 months. A payment default is defined as a loan that was 90 or more days past due. The modifications made during the three and nine months ended September 30, 2018 , did not significantly impact the Company's determination of the allowance for loan losses. On an ongoing basis, the Company monitors the performance of the modified loans to their restructured terms. In the event of a subsequent default, the allowance for loan losses continues to be reassessed on the basis of an individual evaluation of the loan.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Note 6 - Fair Value of Financial Instruments Fair value is the exchange price that is expected to 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. Certain assets and liabilities are recorded in the Company's financial statements at fair value. Some are recorded on a recurring basis and some on a non-recurring basis. The Company utilizes fair value measurement to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures. The determination of fair values of financial instruments often requires the use of estimates. In cases where quoted market values in an active market are not available, the Company utilizes valuation techniques that are consistent with the market approach, the income approach and/or the cost approach to estimate the fair values of its financial instruments. Such valuation techniques are consistently applied. A hierarchy for fair value has been established which categorizes the valuation techniques into three levels used to measure fair value. The three levels are as follows: Level 1 - Fair value is based on unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 - Fair value is based on significant other observable inputs which are generally determined based on a single price for each financial instrument provided to the Company by an unrelated third-party pricing service and is based on one or more of the following: • Quoted prices for similar, but not identical, assets or liabilities in active markets; • Quoted prices for identical or similar assets or liabilities in markets that are not active; • Inputs other than quoted prices that are observable, such as interest rate and yield curves, volatilities, prepayment speeds, loss severities, credit risks and default rates; • Other inputs derived from or corroborated by observable market inputs. Level 3 - Prices or valuation techniques that require inputs that are both significant and unobservable in the market. These instruments are valued using the best information available, some of which is internally developed, and reflects the Company's own assumptions about the risk premiums that market participants would generally require and the assumptions they would use. There were no transfers between fair value reporting levels for any period presented. Fair Values of Assets and Liabilities Recorded on a Recurring Basis The following tables summarize financial assets and financial liabilities recorded at fair value on a recurring basis at September 30, 2018 , and December 31, 2017 , segregated by the level of valuation inputs within the fair value hierarchy utilized to measure fair value. There were no changes in the valuation techniques during either period. September 30, 2018 (Dollars in thousands) Level 1 Level 2 Level 3 Total State and municipal securities $ — $ 81,348 $ 40,200 $ 121,548 Corporate bonds — 3,080 — 3,080 U.S. Government and agency securities — 60,297 — 60,297 Commercial mortgage-backed securities — 14,368 — 14,368 Residential mortgage-backed securities — 177,187 — 177,187 Residential collateralized mortgage obligations — 209,308 — 209,308 Securities available for sale — 545,588 40,200 585,788 Securities carried at fair value through income — — 11,273 11,273 Loans held for sale — 20,786 — 20,786 Loans at fair value — — 20,444 20,444 Mortgage servicing rights — — 26,163 26,163 Other assets - derivatives — 3,234 — 3,234 Total recurring fair value measurements - assets $ — $ 569,608 $ 98,080 $ 667,688 Other liabilities - derivatives $ — $ (2,616 ) $ — $ (2,616 ) Total recurring fair value measurements - liabilities $ — $ (2,616 ) $ — $ (2,616 ) December 31, 2017 (Dollars in thousands) Level 1 Level 2 Level 3 Total State and municipal securities $ — $ 87,963 $ 42,015 $ 129,978 Corporate bonds — 3,136 — 3,136 Residential mortgage-backed securities — 105,029 — 105,029 Residential collateralized mortgage obligations — 166,389 — 166,389 Securities available for sale — 362,517 42,015 404,532 Securities carried at fair value through income — — 12,033 12,033 Loans held for sale — 32,768 — 32,768 Loans at fair value — — 26,611 26,611 Mortgage servicing rights — — 24,182 24,182 Other assets - derivatives — 3,146 — 3,146 Total recurring fair value measurements - assets $ — $ 398,431 $ 104,841 $ 503,272 Other liabilities - derivatives $ — $ (3,320 ) $ — $ (3,320 ) Total recurring fair value measurements - liabilities $ — $ (3,320 ) $ — $ (3,320 ) The changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the nine months ended September 30, 2018 and 2017 , are summarized as follows: (Dollars in thousands) Loans at Fair Value MSRs Securities Available for Sale Securities at FV Through Income Balance at January 1, 2018 $ 26,611 $ 24,182 $ 42,015 $ 12,033 Gain (loss) recognized in earnings: Mortgage banking revenue (1) — 444 — — Other noninterest income (488 ) — — (530 ) Gain (loss) recognized in AOCI — — (219 ) — Purchases, issuances, sales and settlements: Originations — 1,537 — — Purchases — — 259 — Settlements (5,679 ) — (1,855 ) (230 ) Balance at September 30, 2018 $ 20,444 $ 26,163 $ 40,200 $ 11,273 Balance at January 1, 2017 $ 33,693 $ 29,385 $ 43,858 $ 12,511 Gain (loss) recognized in earnings: Mortgage banking revenue (1) — (5,298 ) — — Other noninterest income (462 ) — — (35 ) Gain recognized in AOCI — — 277 — Purchases, issuances, sales, and settlements: Purchases — 2,184 275 — Sales (2,516 ) — — — Settlements (3,535 ) — (2,171 ) (204 ) Balance at September 30, 2017 $ 27,180 $ 26,271 $ 42,239 $ 12,272 ____________________________ (1) Total mortgage banking revenue includes changes in fair value due to market changes and due to run-off. The following methodologies were used to measure the fair value of financial assets and liabilities valued on a recurring basis: Securities Available for Sale Securities classified as available for sale are reported at fair value utilizing Level 2 or Level 3 inputs. For Level 2 securities, the Company obtains fair value measurements from an independent pricing service. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury yield curve, live trading levels, market consensus prepayment speeds, credit information and the security's terms and conditions, among other things. In order to ensure the fair values are consistent with ASC 820, Fair Value Measurements and Disclosures, the Company periodically checks the fair value by comparing them to another pricing source, such as Bloomberg. The third -party pricing service is subject to an annual review of internal controls (SSAE 16), which is made available to the Company. In certain cases where Level 2 inputs are not available, securities are classified within Level 3 of the hierarchy. Mortgage Servicing Rights ("MSR") The carrying amounts of the MSRs equal fair value and are valued on a discounted cash flow valuation technique. The significant assumptions used to value MSRs were as follows: September 30, 2018 December 31, 2017 Prepayment speed 8.80 % 10.80 % Discount rate 9.97 9.33 In recent years, there have been significant market-driven fluctuations in the assumptions listed above. These fluctuations can be rapid and may continue to be significant. Therefore, estimating these assumptions within ranges that market participants would use in determining the fair value of MSRs requires significant management judgment. Derivatives Fair values for interest rate swap agreements are based upon the amounts that would be required to settle the contracts. Fair values for derivative loan commitments and forward loan sale commitments are based on fair values of the underlying mortgage loans and the probability of such commitments being exercised. Significant management judgment and estimation is required in determining these fair value measurements. Fair Values of Assets Recorded on a Recurring Basis for which the Fair Value Option has been Elected Certain assets are measured at fair value on a recurring basis due to the Company's election to adopt fair value accounting treatment for those assets. This election allows for a more effective offset of the changes in fair values of the assets and the derivative instruments used to economically hedge them without the burden of complying with the requirements for hedge accounting under ASC 815, Derivatives and Hedging. For assets for which the fair value has been elected, the earned current contractual interest payment is recognized in interest income, loan origination costs and fees on fair value option loans are recognized in earnings as incurred and not deferred. At September 30, 2018 , and December 31, 2017 , there were no gains or losses recorded attributable to changes in instrument-specific credit risk. The following tables summarize the difference between the fair value and the unpaid principal balance for financial instruments for which the fair value option has been elected: September 30, 2018 (Dollars in thousands) Aggregate Fair Value Aggregate Unpaid Principal Balance Difference Loans held for sale (1) $ 20,786 $ 20,538 $ 248 Commercial and industrial loans held for investment (2) 739 739 — Commercial real estate loans held for investment (2) 19,705 19,625 80 Securities carried at fair value through income 11,273 11,688 (415 ) Total $ 52,503 $ 52,590 $ (87 ) ____________________ (1) $1.4 million of loans were designated as nonaccrual or past due 90 days or more at September 30, 2018 . Of this balance, the Company had guarantees receivable from U.S. Government agencies totaling $1.2 million . (2) There were no commercial and industrial loans or commercial real estate loans for which the fair value had been elected that were designated as nonaccrual or past due 90 days or more at September 30, 2018 . December 31, 2017 (Dollars in thousands) Aggregate Fair Value Aggregate Unpaid Principal Balance Difference Loans held for sale (1) $ 32,768 $ 32,216 $ 552 Commercial and industrial loans held for investment (2) 5,611 5,591 20 Commercial real estate loans held for investment (2) 21,000 20,451 549 Securities carried at fair value through income 12,033 11,918 115 Total $ 71,412 $ 70,176 $ 1,236 ____________________________ (1) $2.4 million of loans were past due 90 days or more at December 31, 2017 . Of this balance, the Company had guarantees receivable from U.S. government agencies totaling $1.8 million . (2) There were no commercial and industrial loans or commercial real estate loans for which the fair value had been elected that were designated as nonaccrual or past due 90 days or more at December 31, 2017 . Changes in the fair value of assets for which the Company elected the fair value option are classified in the income statement line items reflected in the following table Three months ended September 30, Nine months ended September 30, (Dollars in thousands) 2018 2017 2018 2017 Changes in fair value included in noninterest income: Mortgage banking revenue $ (251 ) $ 80 $ (304 ) $ 100 Other income: Loans at fair value held for investment (101 ) (288 ) $ (488 ) (462 ) Securities carried at fair value through income (140 ) (63 ) (530 ) (35 ) Total impact on other income (241 ) (351 ) (1,018 ) (497 ) Total fair value option impact on noninterest income (1) $ (492 ) $ (271 ) $ (1,322 ) $ (397 ) ____________________________ (1) The fair value option impact on noninterest income is offset by the derivative gain/loss recognized in noninterest income. Please see Note 7 - Mortgage Banking for more detail. The following methodologies were used to measure the fair value of financial assets valued on a recurring basis for which the fair value option was elected: Securities at Fair Value through Income Securities carried at fair value through income are valued using a discounted cash flow with a credit spread applied to each instrument based on the credit worthiness of each issuer. Credit spreads ranged from 126 to 227 basis points at both September 30, 2018 , and December 31, 2017 . The Company believes the fair value approximates an exit price. Loans Held for Sale Fair values for loans held for sale are established using anticipated sale prices for loans allocated to a sale commitment, and those unallocated to a commitment are valued based on the interest rate and term for similar loans allocated. The Company believes the fair value approximates an exit price. Loans Held for Investment For loans held for investment for which the fair value option has been elected, fair values are calculated using a discounted cash flow model with inputs including observable interest rate curves and unobservable credit adjustment spreads based on credit risk inherent in the loan. Credit spreads ranged from 290 to 413 basis points at September 30, 2018 , and ranged from 283 to 413 basis points at December 31, 2017 . The Company believes the fair value approximates an exit price. Fair Value of Assets Recorded on a Nonrecurring Basis Equity Securities without Readily Determinable Fair Values Equity securities without readily determinable fair values totaled $39.3 million and are shown on the face of the balance sheet. The majority of the Company's equity investments qualify for the practical expedient allowed for equity securities without a readily determinable fair value, such that the Company has elected to carry these securities at cost adjusted for any observable transactions during the period, less any impairment. To date, no impairment has been recorded on the Company's investments in equity securities which do not have readily determinable fair values. Government National Mortgage Association Repurchase Asset The Company recorded $29.9 million and $32.6 million , respectively, at September 30, 2018 , and December 31, 2017 , for Government National Mortgage Association ("GNMA") repurchase assets included in mortgage loans held for sale on the balance sheet. The assets are valued at the lower of cost or market and, where market is lower than cost, valued using anticipated sale prices for loans allocated to a sale commitment, and those unallocated to a commitment are valued based on the interest rate and term for similar loans allocated. The Company believes the fair value approximates an exit price. Please see Note 7 - Mortgage Banking for more information on the GNMA repurchase asset. Collateral Dependent Impaired Loans Loans for which it is probable that the Company will not collect all principal and interest due according to contractual terms are measured for impairment. Allowable methods for determining the amount of impairment include estimating fair value using the fair value of the collateral for collateral-dependent loans. If the impaired loan is identified as collateral-dependent, the fair value method of measuring the amount of impairment is utilized. This method requires obtaining a current independent appraisal of the collateral and applying a discount factor to the value. Impaired loans that are collateral-dependent are classified within Level 3 of the fair value hierarchy when impairment is determined using the fair value method. The fair value of impaired loans with specific allocated losses was $15.2 million and $18.2 million at September 30, 2018 , and December 31, 2017 , respectively. Non-Financial Assets Foreclosed assets held for sale are the only non-financial assets valued on a non-recurring basis which are initially recorded by the Company at fair value, less estimated costs to sell. At foreclosure, if the fair value, less estimated costs to sell, of the real estate acquired is less than the Company’s recorded investment in the related loan, a write-down is recognized through a charge to the allowance for loan losses. Additionally, valuations are periodically performed by management and any subsequent reduction in value is recognized by a charge to income. The carrying value and fair value of foreclosed assets held for sale is estimated using Level 3 inputs based on observable market data and was $3.3 million and $499,000 at September 30, 2018 , and December 31, 2017 , respectively. At September 30, 2018 , the Company had $2.3 million in residential mortgage loans in the process of foreclosure. Fair Values of Financial Instruments Not Recorded at Fair Value The carrying value and estimated fair values of financial instruments not recorded at fair value are as follows: (Dollars in thousands) September 30, 2018 December 31, 2017 Financial assets: Carrying Estimated Carrying Value Estimated Fair Value Level 1 inputs: Cash and cash equivalents $ 140,437 $ 140,437 $ 187,187 $ 187,187 Level 2 inputs: Securities held to maturity 19,602 19,567 20,188 20,265 Non-marketable equity securities held in other financial institutions 39,283 39,283 22,967 22,967 Accrued interest and loan fees receivable 14,618 14,618 10,719 10,719 Level 3 inputs: Loans held for investment, net (1) 3,544,910 3,433,735 3,177,337 3,238,872 Financial liabilities: Level 2 inputs: Deposits 3,727,158 3,468,832 3,512,014 3,352,213 FHLB advances and other borrowings 358,532 356,878 144,357 145,330 Junior subordinated debentures 9,637 10,724 9,619 14,132 Accrued interest payable 2,564 2,564 2,424 2,424 ____________________________ (1) The Loans held for investment, net does not include loans for which the fair value option had been elected at September 30, 2018 , or December 31, 2017 , respectively, as these loans are carried at fair value on a recurring basis.

Mortgage Banking

Mortgage Banking	9 Months Ended
	Sep. 30, 2018
Mortgage Banking [Abstract]
Mortgage Banking	Note 7 - Mortgage Banking The following table presents the Company's revenue from mortgage banking operations: (Dollars in thousands) For the three months ended For the nine months ended Mortgage banking revenue September 30, 2018 September 30, 2017 September 30, 2018 September 30, 2017 Origination $ 194 $ 358 $ 646 $ 963 Gain on sale of loans held for sale 1,761 3,121 5,121 8,541 Servicing 1,728 1,963 5,339 6,072 Total gross mortgage revenue 3,683 5,442 11,106 15,576 Mortgage derivatives gain (loss) (283 ) (136 ) (511 ) 554 MSR change due to payoffs and paydowns (960 ) (1,027 ) (2,791 ) (3,117 ) MSR and hedge fair value adjustment 181 (41 ) (497 ) 30 Gain (loss) on MSR sale (1) — (343 ) 25 (343 ) Mortgage banking revenue $ 2,621 $ 3,895 $ 7,332 $ 12,700 ___________________________ (1) Amount shown during the nine months ended September 30, 2018 , reflects final settlement on a loan servicing portfolio sold during the three months ended December 31, 2017. Management uses mortgage-backed securities to mitigate the impact of changes in fair value of MSRs. See Note 9 - Derivative Financial Instruments for further information. Mortgage Servicing Rights Activity in MSRs was as follows: Three months ended September 30, Nine months ended September 30, (Dollars in thousands) 2018 2017 2018 2017 Balance at beginning of period $ 25,738 $ 27,852 $ 24,182 $ 29,385 Origination of servicing rights 544 748 1,537 2,184 Change in fair value, including amortization (119 ) (2,329 ) 444 (5,298 ) Balance at end of period $ 26,163 $ 26,271 $ 26,163 $ 26,271 The Company receives annual servicing fee income approximating 0.28% of the outstanding balance of the underlying loans. In connection with the Company's activities as a servicer of mortgage loans, the investors and the securitization trusts have no recourse to the Company's assets for failure of debtors to pay when due. The Company is potentially subject to losses in its loan servicing portfolio due to loan foreclosures. The Company has obligations to either repurchase the outstanding principal balance of a loan or make the purchaser whole for the economic benefits of a loan if it is determined that the loan sold was in violation of representations or warranties made by it at the time of the sale, herein referred to as mortgage loan servicing putback expenses. Such representations and warranties typically include those made regarding loans that had missing or insufficient file documentation and/or loans obtained through fraud by borrowers or other third parties. Putback requests may be made until the loan is paid in full. When a putback request is received, the Company evaluates the request and takes appropriate actions based on the nature of the request. The Company is required by Federal National Mortgage Association and Federal Home Loan Mortgage Corporation to provide a response to putback requests within 60 days of the date of receipt. The total mortgage loan servicing putback expenses incurred by the Company were $0 for both the three months ended September 30, 2018 and 2017, and $0 and $52,000 for the nine months ended September 30, 2018 and 2017 , respectively. At September 30, 2018 , and December 31, 2017 , the reserve for mortgage loan servicing putback expenses totaled $196,000 and $254,000 , respectively. There is inherent uncertainty in reasonably estimating the requirement for reserves against future mortgage loan servicing putback expenses. Future putback expenses are dependent on many subjective factors, including the review procedures of the purchasers and the potential refinance activity on loans sold with servicing released and the subsequent consequences under the representations and warranties. 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. 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. 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 mortgage loans held for sale, regardless of whether the Company intends to exercise the buy-back option. These loans are reported as held for sale at lower of cost or market with the offsetting liability being reported in FHLB advances and other borrowings. The balance included in mortgage loans held for sale and FHLB advances and other borrowings at September 30, 2018 , and December 31, 2017 , was $29.9 million and $32.6 million , respectively.

Borrowings

Borrowings	9 Months Ended
	Sep. 30, 2018
Debt Disclosure [Abstract]
Borrowings	Note 8 - Borrowings Borrowed funds are summarized as follows: (Dollars in thousands) September 30, 2018 December 31, 2017 Overnight repurchase agreements with depositors $ 33,809 $ 36,178 GNMA repurchase liability 29,872 32,575 Long-term FHLB advances (1) 294,851 75,604 Total FHLB advances and other borrowings $ 358,532 $ 144,357 Junior subordinated debentures $ 9,637 $ 9,619 ____________________________ (1) Includes a FHLB advance of $250.0 million , with a final maturity in 2033, that is callable quarterly at the option of the FHLB beginning in the third quarter of 2019.

Derivative Financial Instrument

Derivative Financial Instruments	9 Months Ended
	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Note 9 - Derivative Financial Instruments Risk Management Objective of Using Derivatives The Company enters into derivative financial instruments to manage risks related to differences in the amount, timing, and duration of the Company’s known or expected cash receipts and its known or expected cash payments, as well as to manage changes in fair values of some assets which are marked at fair value through the income statement on a recurring basis. Cash Flow Hedges of Interest Rate Risk The Company is a party in interest rate swap agreements under which the Company receives interest at a variable rate and pays at a fixed rate. This derivative instrument represented by this swap agreement is designated as a cash flow hedge of the Company's forecasted variable cash flows under a variable-rate term borrowing agreement. During the term of the swap agreement, the effective portion of changes in the fair value of the derivative instrument are recorded in accumulated other comprehensive income and subsequently reclassified into earnings in the periods that the hedged forecasted variable-rate interest payments affected earnings. There was no ineffective portion of the change in fair value of the derivative recognized directly in earnings. The entire swap fair value will be reclassified into earnings before the expiration date. Derivatives Not Designated as Hedges Customer interest rate derivative program The Company offers certain derivatives products, primarily interest rate swaps, directly to qualified commercial banking customers to facilitate their risk management strategies. In some instances, the Company acts only as an intermediary, simultaneously entering into offsetting agreements with unrelated financial institutions, thereby mitigating its net risk exposure resulting from such transactions and not significantly impacting its results of operations. Because the interest rate derivatives associated with this program do not meet hedge accounting requirements, changes in the fair value of both the customer derivatives and any offsetting derivatives are recognized directly in earnings as a component of noninterest income. Mortgage banking derivatives The Company enters into certain derivative agreements as part of its mortgage banking and related risk management activities. These agreements include interest rate lock commitments on prospective residential mortgage loans and forward commitments to sell these loans to investors on a mandatory delivery basis. The Company also economically hedges the value of MSRs by entering into a series of commitments to purchase mortgage-backed securities in the future. Fair Values of Derivative Instruments on the Balance Sheet The following tables disclose the fair value of derivative instruments in the Company's balance sheets at September 30, 2018 , and December 31, 2017 , as well as the effect of these derivative instruments on the Company's condensed consolidated statements of income for the nine months ended September 30, 2018 and 2017 : Notional Amounts (1) Fair Values (Dollars in thousands) September 30, 2018 December 31, 2017 September 30, 2018 December 31, 2017 Derivatives designated as cash flow hedging instruments: Interest rate swaps included in other assets $ 10,500 $ 10,500 $ 327 $ 41 Derivatives not designated as hedging instruments: Interest rate swaps included in other assets $ 170,792 $ 132,959 $ 2,373 $ 2,314 Interest rate swaps included in other liabilities 166,178 159,479 (2,350 ) (3,221 ) Forward commitments to purchase mortgage-backed securities included in other liabilities 100,000 160,000 (266 ) (50 ) Forward commitments to sell residential mortgage loans included in other assets (liabilities) 35,550 57,400 119 (49 ) Interest rate-lock commitments on residential mortgage loans included in other assets 30,623 37,072 415 791 $ 503,143 $ 546,910 $ 291 $ (215 ) ____________________________ (1) Notional or contractual amounts, which represent the extent of involvement in the derivatives market, are used to determine the contractual cash flows required in accordance with the terms of the agreement. These amounts are typically not exchanged, significantly exceed amounts subject to credit or market risk and are not reflected in the consolidated balance sheets. The weighted-average rates paid and received for interest rate swaps at September 30, 2018 , were as follows: Weighted-Average Interest Rate Paid Interest Rate Received Interest rate swaps: Cash flow hedges 4.81 % 5.07 % Non-hedging interest rate swaps - financial institution counterparties 4.80 4.13 Non-hedging interest rate swaps - customer counterparties 4.14 4.79 Gains and losses recognized on derivative instruments not designated as hedging instruments are as follows: (Dollars in thousands) Three months ended September 30, Nine months ended September 30, Derivatives not designated as hedging instruments: 2018 2017 2018 2017 Amount of (loss) gain recognized in mortgage banking revenue $ (791 ) $ 292 $ (2,998 ) $ 1,346 Amount of gain recognized in other non-interest income 192 141 931 353 Some interest rate swaps included in other assets are subject to a master netting arrangement with the counterparty in all years presented and could be offset against some amounts included in interest rate swaps included in other liabilities. The Company has chosen not to net these exposures in the condensed consolidated balance sheets, and any impact of netting these amounts would not be significant. At September 30, 2018 , and December 31, 2017 , the Company had cash collateral on deposit with swap counterparties totaling $250,000 and $7.0 million , respectively. These amounts are included in interest-bearing deposits in banks in the condensed consolidated balance sheets.

Stock and Incentive Compensatio

Stock and Incentive Compensation Plans	9 Months Ended
	Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock and Incentive Compensation Plans	Note 10 - Stock and Incentive Compensation Plans The Company has granted, and currently has outstanding, stock and incentive compensation awards subject to the provisions of the Company's 2012 Stock Incentive Plan (the "2012 Plan"). Additionally, awards have been issued prior to the establishment of the 2012 Plan, some of which are still outstanding. The 2012 Plan is designed to provide flexibility to the Company regarding its ability to motivate, attract and retain the services of key officers, employees and directors. The 2012 Plan allows the Company to make grants of dividend equivalent rights, incentive stock options, non-qualified stock options, performance unit awards, restricted stock awards, restricted stock units and stock appreciation rights. At September 30, 2018 , the maximum number of shares of the Company's common stock available for issuance under the 2012 Plan was 1,054,172 shares. Share-based compensation cost charged to income for the three and nine months ended September 30, 2018 and 2017 , is presented below: Three months ended September 30, Nine months ended September 30, (Dollars in thousands) 2018 2017 2018 2017 Restricted stock $ 411 $ 265 $ 828 $ 788 Stock options (1) — — — (30 ) Total stock compensation expense $ 411 $ 265 $ 828 $ 758 Related tax benefits recognized in net income $ 86 $ 93 $ 174 $ 265 ____________________________ (1) Stock option expense for the nine months ended September 30, 2017 , included expense reversal related to 5,546 common stock options forfeited during the period. All remaining stock options became fully vested during the first quarter of 2017, with no further expense incurred after February 2017. Restricted Stock Grants The Company's restricted stock grants are time-vested awards and are granted to the Company's Board of Directors, executives and senior management team. The service period in which time-vested awards are earned ranges from one to five years. Time-vested awards are valued utilizing the fair value of the Company's stock at the grant date. These awards are recognized on the straight-line method over the requisite service period, with forfeitures recognized as they occur. The following table summarizes the Company's time-vested award activity: Nine months ended September 30, 2018 2017 Shares Weighted Average Grant-Date Fair Value Shares Weighted Average Grant-Date Fair Value Nonvested shares, January 1, 61,293 $ 24.61 84,019 $ 24.22 Granted 83,500 38.29 24,206 24.60 Vested (18,982 ) 24.31 (24,632 ) 22.42 Forfeited (2,001 ) 37.47 (3,636 ) 24.12 Nonvested shares, September 30, 123,810 $ 33.67 79,957 $ 24.37 During the nine months ended September 30, 2018 , award recipients surrendered and the Company retired 910 shares to cover taxes owed upon the vesting of restricted stock awards. During the nine months ended September 30, 2017 , award recipients surrendered and the Company retired 5,216 shares to cover taxes owed upon the vesting of restricted stock awards. At September 30, 2018 , there was $3.5 million of total unrecognized compensation cost related to nonvested restricted shares awarded under the 2012 Plan. That cost is expected to be recognized over a weighted average period of 2.14 years. Stock Option Grants The Company issues common stock options to select officers and employees through individual agreements and as a result of obligations assumed in association with negotiated mergers. As a result, both incentive and nonqualified stock options have been issued and may be issued in the future. The exercise price of each option varies by agreement and is based on either the fair value of the stock at the date of the grant in circumstances where option grants occurred or based on the previously committed exercise price in the case of options acquired through merger. No outstanding stock option has a term that exceeds twenty years. Vesting periods range from immediate to ten years from the date of grant or merger. The Company recognizes compensation cost for stock option grants over the required service period based upon the grant date fair-value, which is established using a Black-Scholes valuation model. The Black-Scholes valuation model uses assumptions of risk-free interest rate, expected term of stock options, expected stock price volatility and expected dividends. Forfeitures are recognized as they occur. The table below summarizes the status of the Company's stock options and changes during the nine months ended September 30, 2018 and 2017 . (Dollars in thousands, except per share amounts) Number of Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term (in years) Aggregate Intrinsic Value Nine months ended September 30, 2017 Outstanding at January 1, 2017 358,638 $ 11.37 7.79 $ 3,844 Forfeited and expired (16,638 ) 23.89 Outstanding at September 30, 2017 342,000 $ 10.76 6.92 $ 5,390 Nine months ended September 30, 2018 Outstanding at January 1, 2018 319,500 $ 10.65 7.07 $ 4,840 Exercised (8,000 ) 12.29 — — Outstanding at September 30, 2018 311,500 10.61 6.42 8,423 Exercisable at September 30, 2018 311,500 $ 10.61 6.42 $ 8,423

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Note 11 - Income Taxes The provision for income taxes is as follows: Three months ended September 30, Nine months ended September 30, (Dollars in thousands) 2018 2017 2018 2017 Federal income taxes: Current $ 901 $ (4,551 ) $ 2,939 $ (5,472 ) Deferred 1,493 1,890 4,652 5,908 State income taxes: Current 147 (35 ) 491 192 Deferred 27 8 30 36 Income tax expense (benefit) $ 2,568 $ (2,688 ) $ 8,112 $ 664 Effective income tax rate 17.3 % 55.3 % 17.4 % 6.9 % The effective income tax rates differed from the U.S. statutory federal income tax rates of 21% during 2018, and 35% during 2017, primarily due to the effect of tax-exempt income from securities, low income housing and qualified school construction bond tax credits, tax-exempt income from life insurance policies and income tax effects associated with stock-based compensation. Because of these items, the Company expects the effective income tax rate to continue to remain below the U.S. statutory rate. These tax-exempt items can have a larger than proportional effect on the effective income tax rate as net income decreases. The Tax Cuts and Jobs Act, enacted on December 22, 2017, reduced the U.S. federal corporate tax rate from 35% to 21% effective January 1, 2018. The Company remeasured certain deferred tax assets and liabilities in the period of enactment based on the rates at which they are expected to reverse in the future, which is generally 21%. During the first quarter of 2018, the Company adopted the provisions of ASU 2018-02 which resulted in a $282,000 adjustment from accumulated other comprehensive income to retained earnings. Refer to Note 12 - Accumulated Other Comprehensive Income and Note 1 - Significant Accounting Policies for additional information. The Company files a consolidated income tax return in the U.S. federal jurisdiction and various states. With few exceptions, the Company is no longer subject to income tax examinations by tax authorities in these taxing jurisdictions for the years before 2015.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Accumulated Other Comprehensive Income	Note 12 - Accumulated Other Comprehensive Income Accumulated other comprehensive income ("AOCI") includes the after-tax change in unrealized gains and losses on available for sale ("AFS") securities and cash flow hedging activities. (Dollars in thousands) Unrealized gains on AFS securities Cash flow hedges Accumulated other comprehensive income Balance at January 1, 2018 $ 1,280 $ 27 $ 1,307 Net change (8,012 ) 226 (7,786 ) Reclassification of tax effects related to the adoption of ASU 2018-02 (1) : Current (293 ) 17 (276 ) Deferred 569 (11 ) 558 Balance at September 30, 2018 $ (6,456 ) $ 259 $ (6,197 ) Balance at January 1, 2017 $ 3,505 $ (42 ) $ 3,463 Net change (37 ) — (37 ) Balance at September 30, 2017 $ 3,468 $ (42 ) $ 3,426 ____________________________ (1) During the first quarter of 2018, the Company adopted ASU 2018-02. The ASU was issued by the Financial Accounting Standards Board ("FASB") in February 2018, to address the issue of other comprehensive income or loss that became stranded in AOCI as a result of the re-measurement of an entity’s deferred income tax assets and liabilities following the reduction of the U.S. federal corporate tax rate from 35% to 21% pursuant to the enactment of the Tax Cuts and Jobs Act in December 2017. The Company also had certain current tax amounts stranded in AOCI that resulted from a tax accounting election to tax net gains and losses on AFS securities and cash flow hedges as current items beginning in 2016. The Company reclassifies the taxes from AOCI to earnings as the individual securities and hedges are realized. Due to the change in corporate tax rates, the Company had certain net gains and losses taxed at the 35% rate reflected in AOCI. As these transactions are realized over time, they will flow through income tax expense at the 21% rate. Rather than adjusting income tax expense for the difference as each of these securities and instruments are realized, the Company elected to adjust the difference (stranded tax effect) to retained earnings, consistent with the treatment of the deferred tax adjustment.

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Stockholders' Equity	Note 13 - Stockholders' Equity Stock Issuance On May 9, 2018, the Company completed the initial public offering of its common stock at a price to the public of $34.00 per share. The Company issued 3,045,426 shares in the offering, including 545,426 shares sold at the option of the underwriters, and certain selling shareholders sold 1,136,176 shares in the offering. The Company received net proceeds of $96.3 million , before expenses, in the offering. The Company's common stock became eligible for trading on May 9, 2018, on the Nasdaq Global Select Market under the symbol “OBNK.” Additionally, on July 1, 2018, the Company acquired RCF, a Louisiana-based independent insurance agency, issuing 66,824 shares of its common stock at a price of $40.50 per share, based upon the closing stock price on June 28, 2018, increasing common stock outstanding and additional paid in capital by $334,000 and $2.4 million , respectively, in partial consideration of the acquisition. Preferred Stock On June 8, 2018, the Company redeemed all of the 48,260 shares of its Senior Non-Cumulative Perpetual Preferred Stock, Series SBLF (“SBLF Preferred Stock”) thereby eliminating its obligation to pay the nine percent dividend on the SBLF stock. The aggregate redemption price of the SBLF Preferred Stock was $49.1 million , which included dividends of $808,000 accrued up to, but not including, the redemption date. The SBLF Preferred Stock was redeemed from the Company's surplus capital, which included the proceeds of its recently completed initial public offering. The redemption was approved by Origin’s primary federal regulator and it terminated the Company's participation in the Small Business Lending Fund program. During the quarter ended June 30, 2018, all of the 901,644 shares of the Company's outstanding Series D preferred stock were converted into shares of its common stock, on a one-for-one basis. As a result, no shares of Series D preferred stock were outstanding at September 30, 2018.

Capital and Regulatory Matters

Capital and Regulatory Matters	9 Months Ended
	Sep. 30, 2018
Banking and Thrift [Abstract]
Capital and Regulatory Matters	Note 14 - Capital and Regulatory Matters The Company (on a consolidated basis) and the Bank are subject to various regulatory capital requirements administered by federal and state banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company’s consolidated financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and the Bank must meet specific capital guidelines that involve quantitative measures of assets, liabilities and certain off-balance sheet items as calculated under regulatory accounting practices. The capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings and other factors. The Company is subject to the Basel III regulatory capital framework (the "Basel III Capital Rules"). Starting in January 2016, the implementation of the capital conservation buffer was effective for the Company starting at the 0.625% level and increasing 0.625% each year thereafter, until it reaches 2.5% on January 1, 2019. The capital conservation buffer is designed to absorb losses during periods of economic stress and requires increased capital levels for the purpose of capital distributions and other payments. Failure to meet the full amount of the buffer will result in restrictions on the Company's ability to make capital distributions, which includes dividend payments and stock repurchases and to pay discretionary bonuses to executive officers. Quantitative measures established by regulation to ensure capital adequacy require the Company and the Bank to maintain minimum amounts and ratios (set forth in the table below) of total, CET1 and Tier 1 capital (as defined in the regulations) to risk-weighted assets (as defined), and of Tier 1 capital (as defined) to average assets (as defined). Management believes, at September 30, 2018 , and December 31, 2017 , that the Company and the Bank met all capital adequacy requirements to which they are subject, including the capital buffer requirement. At September 30, 2018 , and December 31, 2017 , the Bank’s capital ratios exceeded those levels necessary to be categorized as “well capitalized” under the regulatory framework for prompt corrective action. To be categorized as “well capitalized," the Bank must maintain minimum total risk based, CET1, Tier 1 risk based and Tier 1 leverage ratios as set forth in the table. The actual capital amounts and ratios of the Company and Bank at September 30, 2018 , and December 31, 2017 , are presented in the following table: (Dollars in thousands) Actual Minimum Capital Required - Basel III Fully Phased-In To be Well Capitalized Under Prompt Corrective Action Provisions September 30, 2018 Amount Ratio Amount Ratio Amount Ratio Common Equity Tier 1 Capital to Risk-Weighted Assets Origin Bancorp, Inc. $ 502,273 11.79 % $ 298,171 7.00 % N/A N/A Origin Bank 494,111 11.63 297,276 7.00 $ 276,042 6.50 % Tier 1 Capital to Risk-Weighted Assets Origin Bancorp, Inc. 511,584 12.01 362,067 8.50 N/A N/A Origin Bank 494,111 11.63 360,978 8.50 339,744 8.00 Total Capital to Risk-Weighted Assets Origin Bancorp, Inc. 548,923 12.88 447,422 10.50 N/A N/A Origin Bank 531,450 12.51 445,915 10.50 424,681 10.00 Leverage Ratio Origin Bancorp, Inc. 511,584 11.34 180,455 4.00 N/A N/A Origin Bank 494,111 10.98 179,955 4.00 224,944 5.00 December 31, 2017 Common Equity Tier 1 Capital to Risk-Weighted Assets Origin Bancorp, Inc. $ 360,069 9.35 % $ 269,570 7.00 % N/A N/A Origin Bank 416,175 10.82 269,244 7.00 $ 250,012 6.50 % Tier 1 Capital to Risk-Weighted Assets Origin Bancorp, Inc. 433,338 11.25 327,411 8.50 N/A N/A Origin Bank 416,175 10.82 326,940 8.50 307,708 8.00 Total Capital to Risk-Weighted Assets Origin Bancorp, Inc. 472,437 12.26 404,616 10.50 N/A N/A Origin Bank 455,274 11.84 403,748 10.50 384,522 10.00 Leverage Ratio Origin Bancorp, Inc. 433,338 10.53 164,611 4.00 N/A N/A Origin Bank 416,175 10.13 164,334 4.00 205,418 5.00 In the ordinary course of business, the Company is dependent upon dividends from the Bank to provide funds for the payment of dividends to stockholders and to provide for other cash requirements. Banking regulations may limit the amount of dividends that may be paid. Approval by regulatory authorities is required if the effect of dividends declared would cause the regulatory capital of the Bank to fall below specified minimum levels. Approval is also required if dividends declared and paid exceed the Bank's year-to-date net income combined with the retained net income for the preceding year. Under the foregoing dividend restrictions and while maintaining its “well capitalized” status, management believes that at September 30, 2018 , the Bank could pay aggregate dividends of up to $43.1 million to the Company without prior regulatory approval.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 15 - Commitments and Contingencies Credit Related Commitments In the normal course of business, the Company enters into financial instruments, such as commitments to extend credit and letters of credit, to meet the financing needs of its customers. Such instruments are not reflected in the accompanying consolidated financial statements until they are funded, although they expose the Company to varying degrees of credit risk and interest rate risk in much the same way as funded loans. Commitments to extend credit include revolving commercial credit lines, nonrevolving loan commitments issued mainly to finance the acquisition and development or construction of real property or equipment, and credit card and personal credit lines. The availability of funds under commercial credit lines and loan commitments generally depends on whether the borrower continues to meet credit standards established in the underlying contract and has not violated other contractual conditions. Loan commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee by the borrower. Credit card and personal credit lines are generally subject to cancellation if the borrower’s credit quality deteriorates. A number of commercial and personal credit lines are used only partially or, in some cases, not at all before they expire, and the total commitment amounts do not necessarily represent future cash requirements of the Company. A substantial majority of the letters of credit are standby agreements that obligate the Company to fulfill a customer’s financial commitments to a third party if the customer is unable to perform. The Company issues standby letters of credit primarily to provide credit enhancement to its customers’ other commercial or public financing arrangements and to help them demonstrate financial capacity to vendors of essential goods and services. The contract amounts of these instruments reflect the Company’s exposure to credit risk. The Company undertakes the same credit evaluation in making loan commitments and assuming conditional obligations as it does for on-balance sheet instruments and may require collateral or other credit support. These off-balance sheet financial instruments are summarized below: (Dollars in thousands) September 30, 2018 December 31, 2017 Commitments to extend credit $ 1,247,579 $ 1,068,088 Standby letters of credit 81,432 79,893 In addition to the above, the Company guarantees the credit card debt of certain customers to the merchant bank that issues the credit cards. These guarantees are in place for as long as the guaranteed credit card is open. At both September 30, 2018 , and December 31, 2017 , these credit card guarantees totaled $747,000 and $1.0 million , respectively. This amount represents the maximum potential amount of future payments under the guarantee for which the Company would be responsible in the event of customer non-payment. At September 30, 2018 , and December 31, 2017 , the Company had FHLB letters of credit totaling $130.0 million and $185.0 million , respectively, available to secure public deposits, and for other purposes required or permitted by law. Management establishes an asset-specific allowance for lending-related commitments that are considered impaired and computes a formula-based allowance for performing consumer and commercial lending-related commitments. These are computed using a methodology similar to that used for the commercial loan portfolio, modified for expected maturities and probabilities of drawdown. The reserve for lending-related commitments was $1.6 million and $2.0 million at September 30, 2018 , and December 31, 2017 , respectively, and is included in other liabilities in the accompanying consolidated balance sheets. Loss Contingencies From time to time the Company is also party to various legal proceedings arising in the ordinary course of business. Management does not believe that loss contingencies, if any, arising from such pending litigation or regulatory matters would have a material adverse effect on the consolidated financial position or liquidity of the Company.

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Consolidation	Consolidation : The condensed consolidated financial statements include the accounts of the Company and all other entities in which the Company has a controlling financial interest, including the Bank and Davison Insurance Agency, LLC ("Davison Insurance"), doing business as Thomas & Farr and Reeves, Coon and Funderburg. These condensed consolidated interim financial statements of the Company have been prepared in accordance with U.S. generally accepted accounting principles ("US GAAP") and with the rules and regulations of the Securities and Exchange Commission (the "SEC") for interim financial reporting. Accordingly, they do not include all of the information and footnotes required by US GAAP for complete financial statements. In the opinion of management, all normal and recurring adjustments which are considered necessary to fairly present the results for the interim periods presented have been included. These unaudited statements should be read in conjunction with the consolidated financial statements and notes thereto for the year ended December 31, 2017, included in the Company's prospectus filed with the SEC on May 9, 2018, pursuant to Section 424(b) of the Securities Act of 1933, as amended. Interim results are not necessarily indicative of results for a full year. Certain prior year amounts have been reclassified to conform to the current year financial statement presentations. These changes and reclassifications did not impact previously reported net income or comprehensive income. The Company’s significant accounting policies, including those for loans, impaired loans, non-accrual loans and allowance for loan losses, are described in Note 1 of the Notes to Consolidated Financial Statements in the financial statements for the year ended December 31, 2017, included in the Company's prospectus filed with the SEC on May 9, 2018. There have been no significant changes to these policies since December 31, 2017. Additionally, there were no new accounting policies or changes to existing policies adopted during the first nine months of 2018 that had a significant effect on the Company’s results of operations or financial condition. For interim reporting purposes, the Company follows the same basic accounting policies and considers each interim period as an integral part of an annual period.
Use of Estimates	Use of Estimates : The preparation of financial statements in conformity with US GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Material estimates that are particularly susceptible to change are: the allowance for loan losses; the evaluation of investment securities for other than temporary impairment; fair value measurements of assets and liabilities; and income taxes. Estimates and assumptions are reviewed periodically and the effects of revisions are reflected in the consolidated financial statements in the period they are deemed necessary. While management uses its best judgment, actual results could differ from those estimates.
Effect of Recently Adopted Accounting Standards and Newly Issued But Not Yet Effective Accounting Standards	Effect of Recently Adopted Accounting Standards ASU No. 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. The amendments in this update allow a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act. Since these amendments only relate to the reclassification of the income tax effects of the Tax Cuts and Jobs Act, the underlying guidance that requires that the effect of a change in tax laws or rates be included in income from continuing operations is not affected. These amendments require that an entity disclose a description of the accounting policy for releasing income tax effects from accumulated other comprehensive income. These amendments are effective for fiscal years beginning after December 15, 2018, and interim periods within those years. Early adoption is permitted, including adoption in any interim period, for reporting periods for which financial statements have not yet been issued. These amendments should be applied either in the period of adoption or retrospectively to each period in which the effect of the change in the U.S. federal corporate income tax rate in the Tax Cuts and Jobs Act is recognized. Rather than adjusting income tax expense for the differences as the effect of the change in the U.S. federal corporate income tax rates are realized, the Company elected to adjust the difference (stranded tax effect) to retained earnings, consistent with the treatment of the deferred tax adjustment. The Company adopted this guidance during the first quarter of 2018, which resulted in a reclassification of $282,000 from accumulated other comprehensive income to retained earnings. The Company's policy is to release material stranded tax effects on a specific identification basis. ASU No. 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities. ASU 2017-12 permits hedge accounting for risk components in hedging relationships involving nonfinancial risk and interest rate risk. It also changes the guidance for designating fair value hedges of interest rate risk and for measuring the change in fair value of the hedged item in fair value hedges of interest rate risk. In addition to the amendments to the designation and measurement guidance for qualifying hedging relationships, the amendments in this ASU also align the recognition and presentation of the effects of the hedging instrument and the hedged item in the financial statements. This ASU requires an entity to present the earnings effect of the hedging instrument in the same income statement line item in which the earnings effect of the hedged item is reported. For public entities, these amendments are effective for fiscal years beginning after December 15, 2018, and interim periods within those fiscal years. Early application is permitted. The Company has analyzed its hedges and determined that the amendments in this ASU are currently not applicable to any hedge relationships in effect and therefore, no transition adjustment is necessary. The Company has adopted this ASU during the first quarter of 2018, and will apply the updates to hedging instruments on a go forward basis. ASU No. 2016-15 —Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments. ASU 2016- 15 adds or clarifies guidance on the classification of certain cash receipts and payments in the statement of cash flows. The Company adopted this guidance on January 1, 2018, and, as a result, reclassified $756,000 of the return of capital proceeds from limited partnership investments from operating activities to investing activities for the nine-month period ended September 30, 2017. ASU No. 2016-01 —Financial Instruments —Overall (Subtopic 825-10). The Company adopted this update effective January 1, 2018. The main provisions are to eliminate the available for sale classification of accounting for equity securities and to adjust the fair value disclosures for financial instruments carried at amortized costs such that the disclosed fair values represent an exit price as opposed to an entry price. The majority of the Company's equity investments qualify for the practical expedient allowed for equity securities without a readily determinable fair value, such that the Company has elected to carry these securities at cost adjusted for any observable transactions during the period, less any impairment. To date, no impairment has been recorded on the Company's investments in equity securities which do not have readily determinable fair values. The disclosure of fair value of the loan and interest-bearing deposit portfolios has been presented using an exit price methodology and had an immaterial impact on the Company's financial position. ASU No. 2014-09 — On January 1, 2018, the Company adopted ASU No. 2014-09, " Revenue from Contracts with Customers " ( Topic 606 ), which outlines a single comprehensive revenue recognition model for entities to follow in accounting for revenue from contracts with customers. The implementation of this new guidance did not have a material impact on the measurement or recognition of revenue and no cumulative effect adjustment was recorded to opening retained earnings. Results for reporting periods beginning after January 1, 2018, are presented under Topic 606, while prior period amounts were not adjusted and continue to be reported in accordance with the Company's historic accounting under Topic 605. The majority of the Company's revenue is generated from sources outside the scope of Topic 606. Interest and fees on loans, income from investment securities and mortgage banking revenue are all outside the scope of Topic 606 and are recorded in adherence with US GAAP. Service charges and fees on deposit accounts, credit card interchange insurance commission and fee income, as well as gains and losses on the sale of other assets including other real estate owned (“OREO”) are within the scope of Topic 606; however, the recognition of these revenue streams did not change significantly upon adoption of Topic 606. Descriptions of the Company's revenue generating activities that are within the scope of Topic 606 are described below. Service charges and fees on deposit accounts Service charges and fees on deposit accounts are primarily comprised of maintenance fees, service fees, stop payment and non-sufficient funds fees. The Company's performance obligation for service fees or other fees covering a period of time are generally satisfied, and related revenue recognized, over the period in which the service is provided. The Company's performance obligation for transactional-based fees are generally satisfied, and related revenue recognized, at a point in time. Insurance commission and fee income The Company earns commission income through production on behalf of insurance carriers and also earns fee income by providing complementary services such as collection of premiums. In most instances the Company considers the performance obligation to be complete at the time the service was rendered. Credit card interchange income The Company records credit card interchange income at a point in time as card transactions occur. The Company's performance obligation for these transactions is deemed to have occurred upon completion of each transaction. The amounts are included as a component of other income in the consolidated statements of income. Gain or loss on sale of other assets and OREO In the normal course of business, the Company recognizes the sale on other assets and OREO, along with any gain or loss, when control of the property transfers to the buyer through an executed contractual agreement. The transaction price is fixed, and on occasion the Company will finance a portion of the purchase price of the transferred asset. Effect of Newly Issued But Not Yet Effective Accounting Standards ASU No. 2018-15, Intangibles, Goodwill and Other, Internal Use Software - (Topic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract. The amendments in this ASU align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). Accordingly, the amendments require an entity (customer) in a hosting arrangement that is a service contract to follow the guidance in Subtopic 350-40 to determine which implementation costs to capitalize as an asset related to the service contract and which costs to expense. The amendments also require the entity (customer) to expense the capitalized implementation costs of a hosting arrangement that is a service contract over the term of the hosting arrangement, which includes reasonably certain renewals. For public business entities that are SEC filers, the amendments in the update are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. There is no expected impact to the consolidated financial statements or disclosures associated with the adoption of this ASU. ASU No. 2018-13, Fair Value Measurement - (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement. The amendments in this ASU modify the disclosure requirements on fair value measurements in Topic 820, Fair Value Measurement, based on the concepts in FASB Concepts Statement, Conceptual Framework for Financial Reporting—Chapter 8: Notes to Financial Statements, including the consideration of costs and benefits. For public business entities that are SEC filers, the amendments in the update are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company is evaluating the impact of this ASU on the consolidated financial statements and disclosures. ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. ASU 2016-13 amends guidance on reporting credit losses for assets held at amortized cost basis and available for sale debt securities. For assets held at amortized cost basis, Topic 326 eliminates the probable initial recognition threshold in current GAAP and, instead, requires an entity to reflect its current estimate of all expected credit losses. The allowance for credit losses is a valuation account that is deducted from the amortized cost basis of the financial assets to present the net amount expected to be collected. For available for sale debt securities, credit losses should be measured in a manner similar to current GAAP, however Topic 326 will require that credit losses be presented as an allowance rather than as a write-down. This ASU affects entities holding financial assets and net investment in leases that are not accounted for at fair value through net income. The amendments affect loans, debt securities, trade receivables, net investments in leases, off-balance sheet credit exposures, reinsurance receivables, and any other financial assets not excluded from the scope that have the contractual right to receive cash. The Company anticipates a significant change in the processes and procedures to calculate the loan losses, including changes in assumptions and estimates to consider expected credit losses over the life of the loan versus the current accounting practice that utilizes the incurred loss model. The Company expects to recognize a one-time cumulative effect adjustment to the allowance for loan losses at the beginning of the first reporting period in which the new standard is effective, but cannot yet determine the magnitude of any such one-time adjustment or the overall impact on our results of operations, financial position or disclosures. However, the Company has begun developing processes and procedures to ensure the Company is fully compliant at the required adoption date. Among other things, the Company has initiated data gathering and assessment to support forecasting of asset quality, loan balances, and portfolio net charge-offs and developing asset quality forecast models in preparation for the implementation of this standard. For public business entities that are SEC filers, the amendments in the update are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company continues to evaluate the impact of this ASU on the consolidated financial statements and disclosures. ASU No. 2016-02, Leases (Topic 842). ASU 2016-02 requires lessees to put most leases on their balance sheets but recognize expenses in the income statement in a manner similar to current accounting treatment. This ASU changes the guidance on sale-leaseback transactions, initial direct costs and lease execution costs, and, for lessors, modifies the classification criteria and the accounting for sales-type and direct financing leases. For public business entities, this ASU is effective for annual periods beginning after December 15, 2018, and interim periods therein. ASU No. 2018-11, Leases (Topic 842), Targeted Improvements allows entities with an additional (and optional) transition method to adopt the new lease requirements by allowing them to initially apply the requirements by recognizing a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. The Company expects to make use of this transition option guidance and is currently finalizing the review of key assumptions, including the discount rate used to quantify the valuation of the asset and liability, which is based upon the current interest rate environment and may differ at the time of adoption of the ASU. Based on preliminary evaluation, the overall impact to the balance sheet reflected in the right-of-use asset and corresponding lease obligation liability are expected to range between $19.0 million and $21.0 million at adoption. The Company will continue to evaluate other impacts of adoption but does not anticipate these to be significant. During the first quarter of 2018, the Company adopted ASU 2018-02. The ASU was issued by the Financial Accounting Standards Board ("FASB") in February 2018, to address the issue of other comprehensive income or loss that became stranded in AOCI as a result of the re-measurement of an entity’s deferred income tax assets and liabilities following the reduction of the U.S. federal corporate tax rate from 35% to 21% pursuant to the enactment of the Tax Cuts and Jobs Act in December 2017. The Company also had certain current tax amounts stranded in AOCI that resulted from a tax accounting election to tax net gains and losses on AFS securities and cash flow hedges as current items beginning in 2016. The Company reclassifies the taxes from AOCI to earnings as the individual securities and hedges are realized. Due to the change in corporate tax rates, the Company had certain net gains and losses taxed at the 35% rate reflected in AOCI. As these transactions are realized over time, they will flow through income tax expense at the 21% rate. Rather than adjusting income tax expense for the difference as each of these securities and instruments are realized, the Company elected to adjust the difference (stranded tax effect) to retained earnings, consistent with the treatment of the deferred tax adjustment.
Loans Placed on Accrual Status	All interest accrued but not received for loans placed on nonaccrual status is reversed against interest income. Subsequent receipts on nonaccrual loans are recorded as a reduction of principal, and interest income is recorded only after principal recovery is reasonably assured. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured.
Residential Mortgage Loans Held For Sale	The Company elects the fair value option for recording residential mortgage loans held for sale, as well as certain commercial real estate and commercial and industrial loans, in accordance with US GAAP.
Fair Value of Financial Instruments	The following methodologies were used to measure the fair value of financial assets valued on a recurring basis for which the fair value option was elected: Securities at Fair Value through Income Securities carried at fair value through income are valued using a discounted cash flow with a credit spread applied to each instrument based on the credit worthiness of each issuer. Credit spreads ranged from 126 to 227 basis points at both September 30, 2018 , and December 31, 2017 . The Company believes the fair value approximates an exit price. Loans Held for Sale Fair values for loans held for sale are established using anticipated sale prices for loans allocated to a sale commitment, and those unallocated to a commitment are valued based on the interest rate and term for similar loans allocated. The Company believes the fair value approximates an exit price. Loans Held for Investment For loans held for investment for which the fair value option has been elected, fair values are calculated using a discounted cash flow model with inputs including observable interest rate curves and unobservable credit adjustment spreads based on credit risk inherent in the loan. Credit spreads ranged from 290 to 413 basis points at September 30, 2018 , and ranged from 283 to 413 basis points at December 31, 2017 . The Company believes the fair value approximates an exit price. Fair Value of Assets Recorded on a Nonrecurring Basis Equity Securities without Readily Determinable Fair Values Equity securities without readily determinable fair values totaled $39.3 million and are shown on the face of the balance sheet. The majority of the Company's equity investments qualify for the practical expedient allowed for equity securities without a readily determinable fair value, such that the Company has elected to carry these securities at cost adjusted for any observable transactions during the period, less any impairment. To date, no impairment has been recorded on the Company's investments in equity securities which do not have readily determinable fair values. Government National Mortgage Association Repurchase Asset The Company recorded $29.9 million and $32.6 million , respectively, at September 30, 2018 , and December 31, 2017 , for Government National Mortgage Association ("GNMA") repurchase assets included in mortgage loans held for sale on the balance sheet. The assets are valued at the lower of cost or market and, where market is lower than cost, valued using anticipated sale prices for loans allocated to a sale commitment, and those unallocated to a commitment are valued based on the interest rate and term for similar loans allocated. The Company believes the fair value approximates an exit price. Please see Note 7 - Mortgage Banking for more information on the GNMA repurchase asset. Collateral Dependent Impaired Loans Loans for which it is probable that the Company will not collect all principal and interest due according to contractual terms are measured for impairment. Allowable methods for determining the amount of impairment include estimating fair value using the fair value of the collateral for collateral-dependent loans. If the impaired loan is identified as collateral-dependent, the fair value method of measuring the amount of impairment is utilized. This method requires obtaining a current independent appraisal of the collateral and applying a discount factor to the value. Impaired loans that are collateral-dependent are classified within Level 3 of the fair value hierarchy when impairment is determined using the fair value method. The fair value of impaired loans with specific allocated losses was $15.2 million and $18.2 million at September 30, 2018 , and December 31, 2017 , respectively. Non-Financial Assets Foreclosed assets held for sale are the only non-financial assets valued on a non-recurring basis which are initially recorded by the Company at fair value, less estimated costs to sell. At foreclosure, if the fair value, less estimated costs to sell, of the real estate acquired is less than the Company’s recorded investment in the related loan, a write-down is recognized through a charge to the allowance for loan losses. Additionally, valuations are periodically performed by management and any subsequent reduction in value is recognized by a charge to income. Fair Values of Assets Recorded on a Recurring Basis for which the Fair Value Option has been Elected Certain assets are measured at fair value on a recurring basis due to the Company's election to adopt fair value accounting treatment for those assets. This election allows for a more effective offset of the changes in fair values of the assets and the derivative instruments used to economically hedge them without the burden of complying with the requirements for hedge accounting under ASC 815, Derivatives and Hedging. For assets for which the fair value has been elected, the earned current contractual interest payment is recognized in interest income, loan origination costs and fees on fair value option loans are recognized in earnings as incurred and not deferred. Fair value is the exchange price that is expected to 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. Certain assets and liabilities are recorded in the Company's financial statements at fair value. Some are recorded on a recurring basis and some on a non-recurring basis. The Company utilizes fair value measurement to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures. The determination of fair values of financial instruments often requires the use of estimates. In cases where quoted market values in an active market are not available, the Company utilizes valuation techniques that are consistent with the market approach, the income approach and/or the cost approach to estimate the fair values of its financial instruments. Such valuation techniques are consistently applied. A hierarchy for fair value has been established which categorizes the valuation techniques into three levels used to measure fair value. The three levels are as follows: Level 1 - Fair value is based on unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 - Fair value is based on significant other observable inputs which are generally determined based on a single price for each financial instrument provided to the Company by an unrelated third-party pricing service and is based on one or more of the following: • Quoted prices for similar, but not identical, assets or liabilities in active markets; • Quoted prices for identical or similar assets or liabilities in markets that are not active; • Inputs other than quoted prices that are observable, such as interest rate and yield curves, volatilities, prepayment speeds, loss severities, credit risks and default rates; • Other inputs derived from or corroborated by observable market inputs. Level 3 - Prices or valuation techniques that require inputs that are both significant and unobservable in the market. These instruments are valued using the best information available, some of which is internally developed, and reflects the Company's own assumptions about the risk premiums that market participants would generally require and the assumptions they would use. Derivatives Fair values for interest rate swap agreements are based upon the amounts that would be required to settle the contracts. Fair values for derivative loan commitments and forward loan sale commitments are based on fair values of the underlying mortgage loans and the probability of such commitments being exercised. Significant management judgment and estimation is required in determining these fair value measurements. Securities Available for Sale Securities classified as available for sale are reported at fair value utilizing Level 2 or Level 3 inputs. For Level 2 securities, the Company obtains fair value measurements from an independent pricing service. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury yield curve, live trading levels, market consensus prepayment speeds, credit information and the security's terms and conditions, among other things. In order to ensure the fair values are consistent with ASC 820, Fair Value Measurements and Disclosures, the Company periodically checks the fair value by comparing them to another pricing source, such as Bloomberg. The third -party pricing service is subject to an annual review of internal controls (SSAE 16), which is made available to the Company. In certain cases where Level 2 inputs are not available, securities are classified within Level 3 of the hierarchy. Mortgage Servicing Rights ("MSR") The carrying amounts of the MSRs equal fair value and are valued on a discounted cash flow valuation technique.
Derivative Financial Instruments	Some interest rate swaps included in other assets are subject to a master netting arrangement with the counterparty in all years presented and could be offset against some amounts included in interest rate swaps included in other liabilities. The Company has chosen not to net these exposures in the condensed consolidated balance sheets, and any impact of netting these amounts would not be significant. Note 9 - Derivative Financial Instruments Risk Management Objective of Using Derivatives The Company enters into derivative financial instruments to manage risks related to differences in the amount, timing, and duration of the Company’s known or expected cash receipts and its known or expected cash payments, as well as to manage changes in fair values of some assets which are marked at fair value through the income statement on a recurring basis. Cash Flow Hedges of Interest Rate Risk The Company is a party in interest rate swap agreements under which the Company receives interest at a variable rate and pays at a fixed rate. This derivative instrument represented by this swap agreement is designated as a cash flow hedge of the Company's forecasted variable cash flows under a variable-rate term borrowing agreement. During the term of the swap agreement, the effective portion of changes in the fair value of the derivative instrument are recorded in accumulated other comprehensive income and subsequently reclassified into earnings in the periods that the hedged forecasted variable-rate interest payments affected earnings. There was no ineffective portion of the change in fair value of the derivative recognized directly in earnings. The entire swap fair value will be reclassified into earnings before the expiration date. Derivatives Not Designated as Hedges Customer interest rate derivative program The Company offers certain derivatives products, primarily interest rate swaps, directly to qualified commercial banking customers to facilitate their risk management strategies. In some instances, the Company acts only as an intermediary, simultaneously entering into offsetting agreements with unrelated financial institutions, thereby mitigating its net risk exposure resulting from such transactions and not significantly impacting its results of operations. Because the interest rate derivatives associated with this program do not meet hedge accounting requirements, changes in the fair value of both the customer derivatives and any offsetting derivatives are recognized directly in earnings as a component of noninterest income. Mortgage banking derivatives The Company enters into certain derivative agreements as part of its mortgage banking and related risk management activities. These agreements include interest rate lock commitments on prospective residential mortgage loans and forward commitments to sell these loans to investors on a mandatory delivery basis. The Company also economically hedges the value of MSRs by entering into a series of commitments to purchase mortgage-backed securities in the future.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	Three months ended September 30, Nine months ended September 30, (Dollars in thousands, except per share amounts) 2018 2017 2018 2017 Basic earnings per common share Net income (loss) $ 12,318 $ (2,173 ) $ 38,427 $ 8,897 Less: Dividends to preferred stock — 1,086 1,923 3,258 Net income allocated to participating stockholders (1) (2) 54 32 945 271 Net income (loss) available to common stockholders $ 12,264 $ (3,291 ) $ 35,559 $ 5,368 Weighted average common shares outstanding 23,493,065 19,418,280 21,476,801 19,411,745 Basic earnings (loss) per common share $ 0.52 $ (0.17 ) $ 1.66 $ 0.28 Diluted earnings per common share Diluted earnings (loss) applicable to common stockholders (3) $ 12,300 $ (3,291 ) $ 35,653 $ 5,381 Weighted average diluted common shares outstanding: Weighted average common shares outstanding 23,493,065 19,418,280 21,476,801 19,411,745 Dilutive effect of common stock options (4) 223,714 — 223,714 221,998 Weighted average diluted common shares outstanding 23,716,779 19,418,280 21,700,515 19,633,743 Diluted earnings (loss) per common share $ 0.52 $ (0.17 ) $ 1.64 $ 0.27 ____________________________ (1) Participating stockholders include those that hold certain share-based payment awards that contain nonforfeitable rights to dividends or dividend equivalents. Such shares or units are considered participating securities (i.e., nonvested restricted stock grants). Additionally, for periods prior to June, 30, 2018, Series D preferred stockholders were participating stockholders as those shares participated in dividends with common shares on a one-for-one basis. Net income allocated to participating stockholders does not include dividends paid to preferred stockholders. (2) The average participating share count for the September 30, 2018, year-to-date earnings per share calculation includes an allocation for Series D preferred stockholders. Series D preferred stock was not outstanding during the quarter ended September 30, 2018, and therefore no allocation was made for it during the quarter. (3) Net income allocated to common stockholders for basic and diluted earnings per share may differ under the two-class method as a result of adding common stock equivalents for options to dilutive shares outstanding, which alters the ratio used to allocate earnings to common stockholders and participating securities for the purposes of calculating diluted earnings per share. (4) There was no dilutive effect of common stock options for the third quarter of 2017 due to the anti-dilutive effect on the calculation of diluted loss per common share.

Securities (Tables)

Securities (Tables)	9 Months Ended
	Sep. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Summary of Amortized Cost and Estimated Fair Value of Securities	The following table is a summary of the amortized cost and estimated fair value, including gross unrealized gains and losses, of available for sale, held to maturity and securities carried at fair value through income for the dates indicated: (Dollars in thousands) Amortized Gross Gross Unrealized Losses Fair September 30, 2018 Available for sale: State and municipal securities $ 119,570 $ 2,292 $ (314 ) $ 121,548 Corporate bonds 3,000 80 — 3,080 U.S. Government and agency securities 60,414 — (117 ) 60,297 Commercial mortgage-backed securities 14,439 — (71 ) 14,368 Residential mortgage-backed securities 180,867 55 (3,735 ) 177,187 Residential collateralized mortgage obligations 215,787 18 (6,497 ) 209,308 Total $ 594,077 $ 2,445 $ (10,734 ) $ 585,788 Held to maturity: State and municipal securities $ 19,602 $ — $ (35 ) $ 19,567 Securities carried at fair value through income: State and municipal securities (1) $ 11,688 $ — $ — $ 11,273 December 31, 2017 Available for sale: State and municipal securities $ 125,909 $ 4,104 $ (35 ) $ 129,978 Corporate bonds 3,000 136 — 3,136 Residential mortgage-backed securities 105,132 492 (595 ) 105,029 Residential collateralized mortgage obligations 168,645 262 (2,518 ) 166,389 Total $ 402,686 $ 4,994 $ (3,148 ) $ 404,532 Held to maturity: State and municipal securities $ 20,188 $ 77 $ — $ 20,265 Securities carried at fair value through income: State and municipal securities (1) $ 11,918 $ — $ — $ 12,033 ____________________________ (1) Securities carried at fair value through income have no unrealized gains or losses at the balance sheet date as all changes in value have been recognized in the consolidated statements of income. See Note 6 - Fair Value of Financial Instruments for more information.
Schedule of Securities with Unrealized Loss	Securities with unrealized losses at September 30, 2018 , and December 31, 2017 , aggregated by investment category and those individual securities that have been in a continuous unrealized loss position under and over 12 months were as follows: (Dollars in thousands) Less than 12 Months 12 Months or More Total September 30, 2018 Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss Available for sale: State and municipal securities $ 23,114 $ (258 ) $ 1,517 $ (56 ) $ 24,631 $ (314 ) U.S. Government and agency securities 60,283 (117 ) — — 60,283 (117 ) Commercial mortgage-backed securities 14,368 (71 ) — — 14,368 (71 ) Residential mortgage-backed securities 118,323 (1,742 ) 44,059 (1,993 ) 162,382 (3,735 ) Residential collateralized mortgage obligations 115,173 (1,908 ) 91,506 (4,589 ) 206,679 (6,497 ) Total $ 331,261 $ (4,096 ) $ 137,082 $ (6,638 ) $ 468,343 $ (10,734 ) Held to maturity: State and municipal securities $ 14,349 $ (35 ) $ — $ — $ 14,349 $ (35 ) December 31, 2017 Available for sale: State and municipal securities $ 2,114 $ (5 ) $ 1,210 $ (30 ) $ 3,324 $ (35 ) Residential mortgage-backed securities 46,018 (198 ) 20,233 (397 ) 66,251 (595 ) Residential collateralized mortgage obligations 70,788 (641 ) 60,622 (1,877 ) 131,410 (2,518 ) Total $ 118,920 $ (844 ) $ 82,065 $ (2,304 ) $ 200,985 $ (3,148 )
Securities Classified by Contractual Maturity	The following table presents the amortized cost and fair value of securities available for sale and held to maturity at September 30, 2018 , grouped by contractual maturity. Mortgage-backed securities and collateralized mortgage obligations, which do not have contractual payments due at a single maturity date, are shown separately. Actual maturities for mortgage-backed securities and collateralized mortgage obligations will differ from contractual maturities as a result of prepayments made on the underlying mortgages. (Dollars in thousands) Held to maturity Available for sale September 30, 2018 Amortized Cost Fair Value Amortized Cost Fair Value Due in one year or less $ — $ — $ 58,119 $ 58,069 Due after one year through five years 14,384 14,349 28,088 28,396 Due after five years through ten years — — 85,875 87,421 Due after ten years 5,218 5,218 10,902 11,039 Commercial mortgage-backed securities — — 14,439 14,368 Residential mortgage-backed securities — — 180,867 177,187 Residential collateralized mortgage obligations — — 215,787 209,308 Total $ 19,602 $ 19,567 $ 594,077 $ 585,788
Securities Pledged as Collateral	The following table presents carrying amounts of securities pledged as collateral for deposits and repurchase agreements for the period ends presented. (Dollars in thousands) September 30, 2018 December 31, 2017 Carrying value of securities pledged to secure public deposits $ 325,897 $ 276,319 Carrying value of securities pledged to repurchase agreements 38,631 36,685

Loans (Tables)

Loans (Tables)	9 Months Ended
	Sep. 30, 2018
Receivables [Abstract]
Schedule of Loans	Loans consist of the following: (Dollars in thousands) September 30, 2018 December 31, 2017 Loans held for sale $ 50,658 $ 65,343 Loans held for investment: Loans secured by real estate: Commercial real estate $ 1,162,274 $ 1,083,275 Construction/land/land development 406,249 322,404 Residential real estate 585,931 570,583 Total real estate 2,154,454 1,976,262 Commercial and industrial 1,193,035 989,220 Mortgage warehouse lines of credit 233,325 255,044 Consumer 20,267 20,505 Total loans held for investment (1) 3,601,081 3,241,031 Less: Allowance for loan losses 35,727 37,083 Net loans held for investment $ 3,565,354 $ 3,203,948 ____________________________ (1) Includes net deferred loan fees of $2.9 million and $1.0 million at September 30, 2018 , and December 31, 2017 , respectively.
Recorded Investment in Loans by Credit Quality Indicator	The recorded investment in loans by credit quality indicator at September 30, 2018 , and December 31, 2017 , excluding loans held for sale, were as follows: September 30, 2018 (Dollars in thousands) Pass Special Mention Substandard Doubtful Loss Total Loans secured by real estate: Commercial real estate $ 1,139,571 $ 8,440 $ 14,263 $ — $ — $ 1,162,274 Construction/land/land development 403,159 160 2,930 — — 406,249 Residential real estate 574,728 28 11,175 — — 585,931 Total real estate 2,117,458 8,628 28,368 — — 2,154,454 Commercial and industrial 1,112,473 32,050 48,512 — — 1,193,035 Mortgage warehouse lines of credit 233,325 — — — — 233,325 Consumer 20,028 — 239 — — 20,267 Total loans held for investment $ 3,483,284 $ 40,678 $ 77,119 $ — $ — $ 3,601,081 December 31, 2017 (Dollars in thousands) Pass Special Mention Substandard Doubtful Loss Total Loans secured by real estate: Commercial real estate $ 1,055,911 $ 7,798 $ 19,566 $ — $ — $ 1,083,275 Construction/land/land development 318,488 170 3,746 — — 322,404 Residential real estate 560,945 778 8,860 — — 570,583 Total real estate 1,935,344 8,746 32,172 — — 1,976,262 Commercial and industrial 915,111 15,332 58,777 — — 989,220 Mortgage warehouse lines of credit 255,044 — — — — 255,044 Consumer 20,223 — 279 3 — 20,505 Total loans held for investment $ 3,125,722 $ 24,078 $ 91,228 $ 3 $ — $ 3,241,031 The following is a summary description of the Company's internal risk ratings: • Pass (1-6) Loans within this risk rating are further categorized as follows: Minimal risk (1) Well-collateralized by cash equivalent instruments held by the Bank. Moderate risk (2) Borrowers with excellent asset quality and liquidity. Borrowers' capitalization and liquidity exceed industry norms. Borrowers in this category have significant levels of liquid assets and have a low level of leverage. Better than average risk (3) Borrowers with strong financial strength and excellent liquidity that consistently demonstrate strong operating performance. Borrowers in this category generally have a sizable net worth that can be converted into liquid assets within 12 months. Average risk (4) Borrowers with sound credit quality and financial performance, including liquidity. Borrowers are supported by sufficient cash flow coverage generated through operations across the full business cycle. Marginally acceptable risk (5) Loans generally meet minimum requirements for an acceptable loan in accordance with lending policy, but possess one or more attributes that cause the overall risk profile to be higher than the majority of newly approved loans. Watch (6) A passing loan with one or more factors that identify a potential weakness in the overall ability of the borrower to repay the loan. These weaknesses are generally mitigated by other factors that reduce the risk of delinquency or loss. • Special Mention (7) This grade is intended to be temporary and includes borrowers whose credit quality have deteriorated and is at risk of further decline. • Substandard (8) This grade includes "Substandard" loans, in accordance with regulatory guidelines. Substandard loans exhibit a well-defined weakness that jeopardizes debt repayment in accordance with contractual agreements, even though the loan may be performing. These obligations are characterized by the distinct possibility that a loss may be incurred if these weaknesses are not corrected and repayment may be dependent upon collateral liquidation or secondary source of repayment. • Doubtful (9) This grade includes "Doubtful" loans, in accordance with regulatory guidelines. Such loans are placed on nonaccrual status and repayment may be dependent upon collateral with no readily determinable valuation or valuations that are highly subjective in nature. Repayment for these loans is considered improbable based on currently existing facts and circumstances. • Loss (0) This grade includes "Loss" loans in accordance with regulatory guidelines. Loss loans are charged-off or written-down when repayment is not expected.
Loan Portfolio Aging Analysis	The following tables present the Company’s loan portfolio aging analysis at the dates indicated: September 30, 2018 (Dollars in thousands) 30-59 Days past due 60-89 Days past due Loans past due 90 days or more Total past due Current loans Total loans receivable Accruing loans 90 or more days past due Loans secured by real estate: Commercial real estate $ 414 $ 7,512 $ 976 $ 8,902 $ 1,153,372 $ 1,162,274 $ — Construction/land/land development 25 — 465 490 405,759 406,249 — Residential real estate 2,507 196 3,621 6,324 579,607 585,931 — Total real estate 2,946 7,708 5,062 15,716 2,138,738 2,154,454 — Commercial and industrial 434 738 7,842 9,014 1,184,021 1,193,035 — Mortgage warehouse lines of credit — — — — 233,325 233,325 — Consumer 81 35 — 116 20,151 20,267 — Total loans held for investment $ 3,461 $ 8,481 $ 12,904 $ 24,846 $ 3,576,235 $ 3,601,081 $ — December 31, 2017 (Dollars in thousands) 30-59 Days past due 60-89 Days past due Loans past due 90 days or more Total past due Current loans Total loans receivable Accruing loans 90 or more days past due Loans secured by real estate: Commercial real estate $ 8,427 $ 2,791 $ 1,150 $ 12,368 $ 1,070,907 $ 1,083,275 $ — Construction/land/land development 1,488 172 464 2,124 320,280 322,404 — Residential real estate 2,630 347 3,910 6,887 563,696 570,583 — Total real estate 12,545 3,310 5,524 21,379 1,954,883 1,976,262 — Commercial and industrial 1,517 9,922 8,074 19,513 969,707 989,220 — Mortgage warehouse lines of credit — — — — 255,044 255,044 — Consumer 178 128 74 380 20,125 20,505 — Total loans held for investment $ 14,240 $ 13,360 $ 13,672 $ 41,272 $ 3,199,759 $ 3,241,031 $ —
Allowance for Loan Losses by Portfolio Segment	The following tables detail activity in the allowance for loan losses by portfolio segment. Allocation of a portion of the allowance to one category of loans does not preclude its availability to absorb losses in other categories. Three months ended September 30, 2018 (Dollars in thousands) Beginning balance Charge-offs Recoveries Provision (Benefit) (1) Ending balance Loans secured by real estate: Commercial real estate $ 9,768 $ 42 $ 7 $ (4 ) $ 9,729 Construction/land/land development 3,153 228 5 238 3,168 Residential real estate 5,468 398 68 206 5,344 Commercial and industrial 15,299 290 1,370 606 16,985 Mortgage warehouse lines of credit 203 — — 65 268 Consumer 260 51 22 2 233 Total $ 34,151 $ 1,009 $ 1,472 $ 1,113 $ 35,727 ____________________________ (1) The $504,000 provision for credit losses on the consolidated statements of income includes a $1.1 million net loan loss provision and a $609,000 release of provision for off-balance sheet commitments for the three months ended September 30, 2018 . Nine months ended September 30, 2018 (Dollars in thousands) Beginning balance Charge-offs Recoveries Provision (Benefit) (1) Ending balance Loans secured by real estate: Commercial real estate $ 8,998 $ 51 $ 223 $ 559 $ 9,729 Construction/land/land development 2,950 228 6 440 3,168 Residential real estate 5,807 407 117 (173 ) 5,344 Commercial and industrial 18,831 2,759 2,090 (1,177 ) 16,985 Mortgage warehouse lines of credit 214 — — 54 268 Consumer 283 96 54 (8 ) 233 Total $ 37,083 $ 3,541 $ 2,490 $ (305 ) $ 35,727 ____________________________ (1) The $709,000 benefit for credit losses on the consolidated statements of income includes a $305,000 net loan loss benefit and a $404,000 release of provision for off-balance sheet commitments for the nine months ended September 30, 2018 . Three months ended September 30, 2017 (Dollars in thousands) Beginning balance Charge-offs Recoveries Provision (Benefit) (1) Ending balance Loans secured by real estate: Commercial real estate $ 9,201 $ 272 $ 12 $ 133 $ 9,074 Construction/land/land development 3,086 — 1 346 3,433 Residential real estate 7,363 1,306 21 (176 ) 5,902 Commercial and industrial 21,347 4,629 271 3,532 20,521 Mortgage warehouse lines of credit 303 — — (79 ) 224 Consumer 334 89 26 20 291 Total $ 41,634 $ 6,296 $ 331 $ 3,776 $ 39,445 ____________________________ (1) The $3.3 million provision for credit losses on the consolidated statements of income includes a $3.8 million net loan loss provision offset by a $449,000 release of provision for off-balance sheet commitments for the three months ended September 30, 2017 . Nine months ended September 30, 2017 (Dollars in thousands) Beginning balance Charge-offs Recoveries Provision (1) Ending balance Loans secured by real estate: Commercial real estate $ 8,718 $ 272 $ 88 $ 540 $ 9,074 Construction/land/land development 2,805 — 4 624 3,433 Residential real estate 5,003 1,326 98 2,127 5,902 Commercial and industrial 33,590 17,962 670 4,223 20,521 Mortgage warehouse lines of credit 139 — — 85 224 Consumer 276 137 36 116 291 Total $ 50,531 $ 19,697 $ 896 $ 7,715 $ 39,445 ____________________________ (1) The $8.1 million provision for credit losses on the consolidated statements of income includes a $7.7 million net loan loss provision and an $379,000 provision for off-balance sheet commitments for the nine months ended September 30, 2017 .
Loans Receivable by Method of Impairment Evaluation	The following tables present the balance of loans receivable by method of impairment evaluation at the dates indicated: September 30, 2018 (Dollars in thousands) Period end allowance allocated to loans individually evaluated for impairment Period end allowance allocated to loans collectively evaluated for impairment Period end loan balance individually evaluated for impairment Period end loan balance collectively evaluated for impairment (1) Loans secured by real estate: Commercial real estate $ 1,193 $ 8,536 $ 10,078 $ 1,132,491 Construction/land/land development 19 3,149 1,044 405,205 Residential real estate 70 5,274 7,558 578,373 Commercial and industrial 2,029 14,956 13,381 1,178,915 Mortgage warehouse lines of credit — 268 — 233,325 Consumer 23 210 230 20,037 Total $ 3,334 $ 32,393 $ 32,291 $ 3,548,346 ____________________________ (1) Excludes $19.7 million and $739,000 of commercial real estate loans and commercial and industrial loans, respectively, at fair value, which are not evaluated for impairment due to the fair value option election. See Note 6 - Fair Value of Financial Instruments for more information. December 31, 2017 (Dollars in thousands) Period end allowance allocated to loans individually evaluated for impairment Period end allowance allocated to loans collectively evaluated for impairment Period end loan balance individually evaluated for impairment Period end loan balance collectively evaluated for impairment (1) Loans secured by real estate: Commercial real estate $ 312 $ 8,686 $ 4,945 $ 1,057,330 Construction/land/land development 4 2,946 1,963 320,441 Residential real estate 72 5,735 7,915 562,668 Commercial and industrial 4,356 14,475 24,598 959,011 Mortgage warehouse lines of credit — 214 — 255,044 Consumer 63 220 237 20,268 Total $ 4,807 $ 32,276 $ 39,658 $ 3,174,762 ____________________________ (1) Excludes $21.0 million and $5.6 million of commercial real estate loans and commercial and industrial loans, respectively, at fair value, which are not evaluated for impairment due to the fair value option election. See Note 6 - Fair Value of Financial Instruments for more information
Impaired Loans	The following tables present impaired loans at the dates indicated. No mortgage warehouse lines of credit were impaired at either September 30, 2018 , or December 31, 2017 . September 30, 2018 (Dollars in thousands) Unpaid contractual principal balance Recorded investment with no allowance Recorded investment with an allowance Total recorded investment Allocation of allowance for loan losses Loans secured by real estate: Commercial real estate $ 10,950 $ 2,304 $ 7,774 $ 10,078 $ 1,193 Construction/land/land development 1,344 737 307 1,044 19 Residential real estate 8,533 6,626 932 7,558 70 Total real estate 20,827 9,667 9,013 18,680 1,282 Commercial and industrial 13,894 5,541 7,840 13,381 2,029 Consumer 251 — 230 230 23 Total impaired loans $ 34,972 $ 15,208 $ 17,083 $ 32,291 $ 3,334 December 31, 2017 (Dollars in thousands) Unpaid contractual principal balance Recorded investment with no allowance Recorded investment with an allowance Total recorded investment Allocation of allowance for loan losses Loans secured by real estate: Commercial real estate $ 6,047 $ 1,782 $ 3,163 $ 4,945 $ 312 Construction/land/land development 2,268 1,813 150 1,963 4 Residential real estate 10,024 6,750 1,165 7,915 72 Total real estate 18,339 10,345 4,478 14,823 388 Commercial and industrial 25,212 6,161 18,437 24,598 4,356 Consumer 259 141 96 237 63 Total impaired loans $ 43,810 $ 16,647 $ 23,011 $ 39,658 $ 4,807 The average recorded investment and interest recognized on impaired loans while classified as impaired for the three and nine months ended September 30, 2018 and 2017 , were as follows: Three months ended September 30, 2018 2017 (Dollars in thousands) Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized Loans secured by real estate: Commercial real estate $ 10,070 $ 14 $ 6,894 $ 41 Construction/land/land development 1,228 2 846 2 Residential real estate 7,741 12 9,439 16 Total real estate 19,039 28 17,179 59 Commercial and industrial 12,891 54 30,545 95 Consumer 263 1 253 2 Total impaired loans $ 32,193 $ 83 $ 47,977 $ 156 Nine months ended September 30, 2018 2017 (Dollars in thousands) Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized Loans secured by real estate: Commercial real estate $ 9,983 $ 57 $ 7,454 $ 127 Construction/land/land development 1,515 14 924 7 Residential real estate 7,631 48 9,777 57 Total real estate 19,129 119 18,155 191 Commercial and industrial 14,932 158 45,536 250 Consumer 264 4 242 5 Total impaired loans $ 34,325 $ 281 $ 63,933 $ 446
Non-performing (Nonaccrual) Loans Held for Investment	Non-performing (nonaccrual) loans held for investment were as follows: (Dollars in thousands) September 30, 2018 December 31, 2017 Loans secured by real estate: Commercial real estate $ 8,851 $ 1,745 Construction/land/land development 960 1,097 Residential real estate 7,220 7,166 Total real estate 17,031 10,008 Commercial and industrial 9,285 13,512 Consumer 238 282 Total nonaccrual loans $ 26,554 $ 23,802
Loans Classified as Troubled Debt Restructurings (TDRs)	The following is a summary of loans classified as TDRs. (Dollars in thousands) September 30, 2018 December 31, 2017 TDRs Nonaccrual TDRs $ 2,040 $ 2,622 Performing TDRs 5,862 14,234 Total $ 7,902 $ 16,856 The following table presents the pre-modification balance of TDR modifications that occurred during the three and nine months ended September 30, 2018 , and September 30, 2017 , and the ending balances by concession type as of each period presented. At and for the three months ended September 30, 2018 (Dollars in thousands) Number of loans restructured Pre-modification recorded balance Term Concessions Interest Rate Concessions Combination Total Modifications Loans secured by real estate: Commercial real estate 1 $ 252 $ 150 $ — $ — $ 150 Commercial and industrial 3 199 182 — 15 197 Total 4 $ 451 $ 332 $ — $ 15 $ 347 At and for the nine months ended September 30, 2018 (Dollars in thousands) Number of loans restructured Pre-modification recorded balance Term Concessions Interest Rate Concessions Combination Total Modifications Loans secured by real estate: Commercial real estate 1 $ 252 $ 150 $ — $ — $ 150 Residential real estate 5 187 49 21 102 172 Total real estate 6 439 199 21 102 322 Commercial and industrial 3 198 182 — 15 197 Consumer 1 33 — — 31 31 Total 10 $ 670 $ 381 $ 21 $ 148 $ 550 At and for the three months ended September 30, 2017 (Dollars in thousands) Number of loans restructured Pre-modification recorded balance Term Concessions Interest Rate Concessions Combination Total Modifications Loans secured by real estate: Commercial real estate — $ — $ — $ — $ — $ — Residential real estate 2 130 40 — 206 246 Total real estate 2 130 40 — 206 246 Commercial and industrial 1 42 — — 44 44 Consumer 1 49 47 — — 47 Total 4 $ 221 $ 87 $ — $ 250 $ 337 At and for the nine months ended September 30, 2017 (Dollars in thousands) Number of loans restructured Pre-modification recorded balance Term Concessions Interest Rate Concessions Combination Total Modifications Loans secured by real estate: Commercial real estate 3 $ 2,643 $ 2,001 $ — $ — $ 2,001 Residential real estate 4 171 79 — 206 285 Total real estate 7 2,814 2,080 — 206 2,286 Commercial and industrial 7 8,295 7,392 — 44 7,436 Consumer 1 49 47 — — 47 Total 15 $ 11,158 $ 9,519 $ — $ 250 $ 9,769

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value of Assets and Liabilities Recorded on a Recurring Basis	The following tables summarize financial assets and financial liabilities recorded at fair value on a recurring basis at September 30, 2018 , and December 31, 2017 , segregated by the level of valuation inputs within the fair value hierarchy utilized to measure fair value. There were no changes in the valuation techniques during either period. September 30, 2018 (Dollars in thousands) Level 1 Level 2 Level 3 Total State and municipal securities $ — $ 81,348 $ 40,200 $ 121,548 Corporate bonds — 3,080 — 3,080 U.S. Government and agency securities — 60,297 — 60,297 Commercial mortgage-backed securities — 14,368 — 14,368 Residential mortgage-backed securities — 177,187 — 177,187 Residential collateralized mortgage obligations — 209,308 — 209,308 Securities available for sale — 545,588 40,200 585,788 Securities carried at fair value through income — — 11,273 11,273 Loans held for sale — 20,786 — 20,786 Loans at fair value — — 20,444 20,444 Mortgage servicing rights — — 26,163 26,163 Other assets - derivatives — 3,234 — 3,234 Total recurring fair value measurements - assets $ — $ 569,608 $ 98,080 $ 667,688 Other liabilities - derivatives $ — $ (2,616 ) $ — $ (2,616 ) Total recurring fair value measurements - liabilities $ — $ (2,616 ) $ — $ (2,616 ) December 31, 2017 (Dollars in thousands) Level 1 Level 2 Level 3 Total State and municipal securities $ — $ 87,963 $ 42,015 $ 129,978 Corporate bonds — 3,136 — 3,136 Residential mortgage-backed securities — 105,029 — 105,029 Residential collateralized mortgage obligations — 166,389 — 166,389 Securities available for sale — 362,517 42,015 404,532 Securities carried at fair value through income — — 12,033 12,033 Loans held for sale — 32,768 — 32,768 Loans at fair value — — 26,611 26,611 Mortgage servicing rights — — 24,182 24,182 Other assets - derivatives — 3,146 — 3,146 Total recurring fair value measurements - assets $ — $ 398,431 $ 104,841 $ 503,272 Other liabilities - derivatives $ — $ (3,320 ) $ — $ (3,320 ) Total recurring fair value measurements - liabilities $ — $ (3,320 ) $ — $ (3,320 )
Changes in Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis	The changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the nine months ended September 30, 2018 and 2017 , are summarized as follows: (Dollars in thousands) Loans at Fair Value MSRs Securities Available for Sale Securities at FV Through Income Balance at January 1, 2018 $ 26,611 $ 24,182 $ 42,015 $ 12,033 Gain (loss) recognized in earnings: Mortgage banking revenue (1) — 444 — — Other noninterest income (488 ) — — (530 ) Gain (loss) recognized in AOCI — — (219 ) — Purchases, issuances, sales and settlements: Originations — 1,537 — — Purchases — — 259 — Settlements (5,679 ) — (1,855 ) (230 ) Balance at September 30, 2018 $ 20,444 $ 26,163 $ 40,200 $ 11,273 Balance at January 1, 2017 $ 33,693 $ 29,385 $ 43,858 $ 12,511 Gain (loss) recognized in earnings: Mortgage banking revenue (1) — (5,298 ) — — Other noninterest income (462 ) — — (35 ) Gain recognized in AOCI — — 277 — Purchases, issuances, sales, and settlements: Purchases — 2,184 275 — Sales (2,516 ) — — — Settlements (3,535 ) — (2,171 ) (204 ) Balance at September 30, 2017 $ 27,180 $ 26,271 $ 42,239 $ 12,272 ____________________________ (1) Total mortgage banking revenue includes changes in fair value due to market changes and due to run-off.
Significant Assumptions Used to Value Mortgage Servicing Rights	The significant assumptions used to value MSRs were as follows: September 30, 2018 December 31, 2017 Prepayment speed 8.80 % 10.80 % Discount rate 9.97 9.33
Difference Between Fair Value and the Unpaid Principal Balance for Financial Instruments for which the Fair Value Option has been Elected and Classification in Income Statement	The following tables summarize the difference between the fair value and the unpaid principal balance for financial instruments for which the fair value option has been elected: September 30, 2018 (Dollars in thousands) Aggregate Fair Value Aggregate Unpaid Principal Balance Difference Loans held for sale (1) $ 20,786 $ 20,538 $ 248 Commercial and industrial loans held for investment (2) 739 739 — Commercial real estate loans held for investment (2) 19,705 19,625 80 Securities carried at fair value through income 11,273 11,688 (415 ) Total $ 52,503 $ 52,590 $ (87 ) ____________________ (1) $1.4 million of loans were designated as nonaccrual or past due 90 days or more at September 30, 2018 . Of this balance, the Company had guarantees receivable from U.S. Government agencies totaling $1.2 million . (2) There were no commercial and industrial loans or commercial real estate loans for which the fair value had been elected that were designated as nonaccrual or past due 90 days or more at September 30, 2018 . December 31, 2017 (Dollars in thousands) Aggregate Fair Value Aggregate Unpaid Principal Balance Difference Loans held for sale (1) $ 32,768 $ 32,216 $ 552 Commercial and industrial loans held for investment (2) 5,611 5,591 20 Commercial real estate loans held for investment (2) 21,000 20,451 549 Securities carried at fair value through income 12,033 11,918 115 Total $ 71,412 $ 70,176 $ 1,236 ____________________________ (1) $2.4 million of loans were past due 90 days or more at December 31, 2017 . Of this balance, the Company had guarantees receivable from U.S. government agencies totaling $1.8 million . (2) There were no commercial and industrial loans or commercial real estate loans for which the fair value had been elected that were designated as nonaccrual or past due 90 days or more at December 31, 2017 . Changes in the fair value of assets for which the Company elected the fair value option are classified in the income statement line items reflected in the following table Three months ended September 30, Nine months ended September 30, (Dollars in thousands) 2018 2017 2018 2017 Changes in fair value included in noninterest income: Mortgage banking revenue $ (251 ) $ 80 $ (304 ) $ 100 Other income: Loans at fair value held for investment (101 ) (288 ) $ (488 ) (462 ) Securities carried at fair value through income (140 ) (63 ) (530 ) (35 ) Total impact on other income (241 ) (351 ) (1,018 ) (497 ) Total fair value option impact on noninterest income (1) $ (492 ) $ (271 ) $ (1,322 ) $ (397 ) ____________________________ (1) The fair value option impact on noninterest income is offset by the derivative gain/loss recognized in noninterest income. Please see Note 7 - Mortgage Banking for more detail.
Carrying Value and Estimated Fair Value of Financial Instruments Not Measured at Fair Value	The carrying value and estimated fair values of financial instruments not recorded at fair value are as follows: (Dollars in thousands) September 30, 2018 December 31, 2017 Financial assets: Carrying Estimated Carrying Value Estimated Fair Value Level 1 inputs: Cash and cash equivalents $ 140,437 $ 140,437 $ 187,187 $ 187,187 Level 2 inputs: Securities held to maturity 19,602 19,567 20,188 20,265 Non-marketable equity securities held in other financial institutions 39,283 39,283 22,967 22,967 Accrued interest and loan fees receivable 14,618 14,618 10,719 10,719 Level 3 inputs: Loans held for investment, net (1) 3,544,910 3,433,735 3,177,337 3,238,872 Financial liabilities: Level 2 inputs: Deposits 3,727,158 3,468,832 3,512,014 3,352,213 FHLB advances and other borrowings 358,532 356,878 144,357 145,330 Junior subordinated debentures 9,637 10,724 9,619 14,132 Accrued interest payable 2,564 2,564 2,424 2,424 ____________________________ (1) The Loans held for investment, net does not include loans for which the fair value option had been elected at September 30, 2018 , or December 31, 2017 , respectively, as these loans are carried at fair value on a recurring basis.

Mortgage Banking (Tables)

Mortgage Banking (Tables)	9 Months Ended
	Sep. 30, 2018
Mortgage Banking [Abstract]
Mortgage Banking Operations	The following table presents the Company's revenue from mortgage banking operations: (Dollars in thousands) For the three months ended For the nine months ended Mortgage banking revenue September 30, 2018 September 30, 2017 September 30, 2018 September 30, 2017 Origination $ 194 $ 358 $ 646 $ 963 Gain on sale of loans held for sale 1,761 3,121 5,121 8,541 Servicing 1,728 1,963 5,339 6,072 Total gross mortgage revenue 3,683 5,442 11,106 15,576 Mortgage derivatives gain (loss) (283 ) (136 ) (511 ) 554 MSR change due to payoffs and paydowns (960 ) (1,027 ) (2,791 ) (3,117 ) MSR and hedge fair value adjustment 181 (41 ) (497 ) 30 Gain (loss) on MSR sale (1) — (343 ) 25 (343 ) Mortgage banking revenue $ 2,621 $ 3,895 $ 7,332 $ 12,700 ___________________________ (1) Amount shown during the nine months ended September 30, 2018 , reflects final settlement on a loan servicing portfolio sold during the three months ended December 31, 2017.
Schedule of Activity in Mortgages Servicing Rights (MSRs)	Activity in MSRs was as follows: Three months ended September 30, Nine months ended September 30, (Dollars in thousands) 2018 2017 2018 2017 Balance at beginning of period $ 25,738 $ 27,852 $ 24,182 $ 29,385 Origination of servicing rights 544 748 1,537 2,184 Change in fair value, including amortization (119 ) (2,329 ) 444 (5,298 ) Balance at end of period $ 26,163 $ 26,271 $ 26,163 $ 26,271

Borrowings (Tables)

Borrowings (Tables)	9 Months Ended
	Sep. 30, 2018
Debt Disclosure [Abstract]
Summary of Borrowed Funds	Borrowed funds are summarized as follows: (Dollars in thousands) September 30, 2018 December 31, 2017 Overnight repurchase agreements with depositors $ 33,809 $ 36,178 GNMA repurchase liability 29,872 32,575 Long-term FHLB advances (1) 294,851 75,604 Total FHLB advances and other borrowings $ 358,532 $ 144,357 Junior subordinated debentures $ 9,637 $ 9,619 ____________________________ (1) Includes a FHLB advance of $250.0 million , with a final maturity in 2033, that is callable quarterly at the option of the FHLB beginning in the third quarter of 2019.

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair Values of Derivative Instruments on the Balance Sheet	The following tables disclose the fair value of derivative instruments in the Company's balance sheets at September 30, 2018 , and December 31, 2017 , as well as the effect of these derivative instruments on the Company's condensed consolidated statements of income for the nine months ended September 30, 2018 and 2017 : Notional Amounts (1) Fair Values (Dollars in thousands) September 30, 2018 December 31, 2017 September 30, 2018 December 31, 2017 Derivatives designated as cash flow hedging instruments: Interest rate swaps included in other assets $ 10,500 $ 10,500 $ 327 $ 41 Derivatives not designated as hedging instruments: Interest rate swaps included in other assets $ 170,792 $ 132,959 $ 2,373 $ 2,314 Interest rate swaps included in other liabilities 166,178 159,479 (2,350 ) (3,221 ) Forward commitments to purchase mortgage-backed securities included in other liabilities 100,000 160,000 (266 ) (50 ) Forward commitments to sell residential mortgage loans included in other assets (liabilities) 35,550 57,400 119 (49 ) Interest rate-lock commitments on residential mortgage loans included in other assets 30,623 37,072 415 791 $ 503,143 $ 546,910 $ 291 $ (215 ) ____________________________ (1) Notional or contractual amounts, which represent the extent of involvement in the derivatives market, are used to determine the contractual cash flows required in accordance with the terms of the agreement. These amounts are typically not exchanged, significantly exceed amounts subject to credit or market risk and are not reflected in the consolidated balance sheets.
Weighted-average Rates Paid and Received for Interest Rate Swaps	The weighted-average rates paid and received for interest rate swaps at September 30, 2018 , were as follows: Weighted-Average Interest Rate Paid Interest Rate Received Interest rate swaps: Cash flow hedges 4.81 % 5.07 % Non-hedging interest rate swaps - financial institution counterparties 4.80 4.13 Non-hedging interest rate swaps - customer counterparties 4.14 4.79
Gains and Losses Recognized on Derivative Instruments Not Designated as Hedging Instruments	Gains and losses recognized on derivative instruments not designated as hedging instruments are as follows: (Dollars in thousands) Three months ended September 30, Nine months ended September 30, Derivatives not designated as hedging instruments: 2018 2017 2018 2017 Amount of (loss) gain recognized in mortgage banking revenue $ (791 ) $ 292 $ (2,998 ) $ 1,346 Amount of gain recognized in other non-interest income 192 141 931 353

Stock and Incentive Compensat_2

Stock and Incentive Compensation Plans (Tables)	9 Months Ended
	Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-based Compensation Cost Charged to Income	Share-based compensation cost charged to income for the three and nine months ended September 30, 2018 and 2017 , is presented below: Three months ended September 30, Nine months ended September 30, (Dollars in thousands) 2018 2017 2018 2017 Restricted stock $ 411 $ 265 $ 828 $ 788 Stock options (1) — — — (30 ) Total stock compensation expense $ 411 $ 265 $ 828 $ 758 Related tax benefits recognized in net income $ 86 $ 93 $ 174 $ 265 ____________________________ (1) Stock option expense for the nine months ended September 30, 2017 , included expense reversal related to 5,546 common stock options forfeited during the period. All remaining stock options became fully vested during the first quarter of 2017, with no further expense incurred after February 2017.
Time-vested Award Activity	The following table summarizes the Company's time-vested award activity: Nine months ended September 30, 2018 2017 Shares Weighted Average Grant-Date Fair Value Shares Weighted Average Grant-Date Fair Value Nonvested shares, January 1, 61,293 $ 24.61 84,019 $ 24.22 Granted 83,500 38.29 24,206 24.60 Vested (18,982 ) 24.31 (24,632 ) 22.42 Forfeited (2,001 ) 37.47 (3,636 ) 24.12 Nonvested shares, September 30, 123,810 $ 33.67 79,957 $ 24.37
Stock Option Activity	The table below summarizes the status of the Company's stock options and changes during the nine months ended September 30, 2018 and 2017 . (Dollars in thousands, except per share amounts) Number of Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term (in years) Aggregate Intrinsic Value Nine months ended September 30, 2017 Outstanding at January 1, 2017 358,638 $ 11.37 7.79 $ 3,844 Forfeited and expired (16,638 ) 23.89 Outstanding at September 30, 2017 342,000 $ 10.76 6.92 $ 5,390 Nine months ended September 30, 2018 Outstanding at January 1, 2018 319,500 $ 10.65 7.07 $ 4,840 Exercised (8,000 ) 12.29 — — Outstanding at September 30, 2018 311,500 10.61 6.42 8,423 Exercisable at September 30, 2018 311,500 $ 10.61 6.42 $ 8,423

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Schedule of Provision for Income Taxes	The provision for income taxes is as follows: Three months ended September 30, Nine months ended September 30, (Dollars in thousands) 2018 2017 2018 2017 Federal income taxes: Current $ 901 $ (4,551 ) $ 2,939 $ (5,472 ) Deferred 1,493 1,890 4,652 5,908 State income taxes: Current 147 (35 ) 491 192 Deferred 27 8 30 36 Income tax expense (benefit) $ 2,568 $ (2,688 ) $ 8,112 $ 664 Effective income tax rate 17.3 % 55.3 % 17.4 % 6.9 %

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	Accumulated other comprehensive income ("AOCI") includes the after-tax change in unrealized gains and losses on available for sale ("AFS") securities and cash flow hedging activities. (Dollars in thousands) Unrealized gains on AFS securities Cash flow hedges Accumulated other comprehensive income Balance at January 1, 2018 $ 1,280 $ 27 $ 1,307 Net change (8,012 ) 226 (7,786 ) Reclassification of tax effects related to the adoption of ASU 2018-02 (1) : Current (293 ) 17 (276 ) Deferred 569 (11 ) 558 Balance at September 30, 2018 $ (6,456 ) $ 259 $ (6,197 ) Balance at January 1, 2017 $ 3,505 $ (42 ) $ 3,463 Net change (37 ) — (37 ) Balance at September 30, 2017 $ 3,468 $ (42 ) $ 3,426 ____________________________ (1) During the first quarter of 2018, the Company adopted ASU 2018-02. The ASU was issued by the Financial Accounting Standards Board ("FASB") in February 2018, to address the issue of other comprehensive income or loss that became stranded in AOCI as a result of the re-measurement of an entity’s deferred income tax assets and liabilities following the reduction of the U.S. federal corporate tax rate from 35% to 21% pursuant to the enactment of the Tax Cuts and Jobs Act in December 2017. The Company also had certain current tax amounts stranded in AOCI that resulted from a tax accounting election to tax net gains and losses on AFS securities and cash flow hedges as current items beginning in 2016. The Company reclassifies the taxes from AOCI to earnings as the individual securities and hedges are realized. Due to the change in corporate tax rates, the Company had certain net gains and losses taxed at the 35% rate reflected in AOCI. As these transactions are realized over time, they will flow through income tax expense at the 21% rate. Rather than adjusting income tax expense for the difference as each of these securities and instruments are realized, the Company elected to adjust the difference (stranded tax effect) to retained earnings, consistent with the treatment of the deferred tax adjustment

Capital and Regulatory Matters

Capital and Regulatory Matters (Tables)	9 Months Ended
	Sep. 30, 2018
Banking and Thrift [Abstract]
Actual Capital Amounts and Ratios	The actual capital amounts and ratios of the Company and Bank at September 30, 2018 , and December 31, 2017 , are presented in the following table: (Dollars in thousands) Actual Minimum Capital Required - Basel III Fully Phased-In To be Well Capitalized Under Prompt Corrective Action Provisions September 30, 2018 Amount Ratio Amount Ratio Amount Ratio Common Equity Tier 1 Capital to Risk-Weighted Assets Origin Bancorp, Inc. $ 502,273 11.79 % $ 298,171 7.00 % N/A N/A Origin Bank 494,111 11.63 297,276 7.00 $ 276,042 6.50 % Tier 1 Capital to Risk-Weighted Assets Origin Bancorp, Inc. 511,584 12.01 362,067 8.50 N/A N/A Origin Bank 494,111 11.63 360,978 8.50 339,744 8.00 Total Capital to Risk-Weighted Assets Origin Bancorp, Inc. 548,923 12.88 447,422 10.50 N/A N/A Origin Bank 531,450 12.51 445,915 10.50 424,681 10.00 Leverage Ratio Origin Bancorp, Inc. 511,584 11.34 180,455 4.00 N/A N/A Origin Bank 494,111 10.98 179,955 4.00 224,944 5.00 December 31, 2017 Common Equity Tier 1 Capital to Risk-Weighted Assets Origin Bancorp, Inc. $ 360,069 9.35 % $ 269,570 7.00 % N/A N/A Origin Bank 416,175 10.82 269,244 7.00 $ 250,012 6.50 % Tier 1 Capital to Risk-Weighted Assets Origin Bancorp, Inc. 433,338 11.25 327,411 8.50 N/A N/A Origin Bank 416,175 10.82 326,940 8.50 307,708 8.00 Total Capital to Risk-Weighted Assets Origin Bancorp, Inc. 472,437 12.26 404,616 10.50 N/A N/A Origin Bank 455,274 11.84 403,748 10.50 384,522 10.00 Leverage Ratio Origin Bancorp, Inc. 433,338 10.53 164,611 4.00 N/A N/A Origin Bank 416,175 10.13 164,334 4.00 205,418 5.00

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Off-Balance Sheet Financial Instruments	These off-balance sheet financial instruments are summarized below: (Dollars in thousands) September 30, 2018 December 31, 2017 Commitments to extend credit $ 1,247,579 $ 1,068,088 Standby letters of credit 81,432 79,893

Significant Accounting Polici_3

Significant Accounting Policies (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018USD ($)centersegment	Sep. 30, 2017USD ($)	Jan. 01, 2019USD ($)	Dec. 31, 2017USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of banking centers | center	41
Number of segments | segment	1
Reclassification from accumulated other comprehensive income	$ 6,197			$ (1,307)
Reclassification to retained earnings	179,178			145,122
Reclassification from operating activities	(64,096)	$ (54,242)
Reclassification to investing activities	$ (584,630)	(167,913)
Accounting Standards Update 2018-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification from accumulated other comprehensive income				282
Reclassification to retained earnings				$ 282
Accounting Standards Update 2016-15
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification from operating activities		756
Reclassification to investing activities		$ 756
Accounting Standards Update 2016-02 | Scenario, Forecast | Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use asset			$ 19,000
Lease obligation			19,000
Accounting Standards Update 2016-02 | Scenario, Forecast | Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use asset			21,000
Lease obligation			$ 21,000

Earnings Per Share (Details)

Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Basic earnings per common share
Net income (loss)	$ 12,318	$ (2,173)	$ 38,427	$ 8,897
Less: Dividends to preferred stock	0	1,086	1,923	3,258
Net income allocated to participating stockholders	54	32	945	271
Net income (loss) available to common stockholders	$ 12,264	$ (3,291)	$ 35,559	$ 5,368
Weighted average common shares outstanding (in shares)	23,493,065	19,418,280	21,476,801	19,411,745
Basic earnings (loss) per common share ($ per share)	$ 0.52	$ (0.17)	$ 1.66	$ 0.28
Diluted earnings per common share
Diluted earnings (loss) applicable to common stockholders (in shares)	$ 12,300	$ (3,291)	$ 35,653	$ 5,381
Weighted average diluted common shares outstanding
Weighted average common shares outstanding (in shares)	23,493,065	19,418,280	21,476,801	19,411,745
Dilutive effect of common stock options (in shares)	223,714	0	223,714	221,998
Weighted average diluted common shares outstanding (in shares)	23,716,779	19,418,280	21,700,515	19,633,743
Diluted earnings (loss) per common share ($ per share)	$ 0.52	$ (0.17)	$ 1.64	$ 0.27

Business Combinations (Details)

Business Combinations (Details) - DH Reeves, LLC $ / shares in Units, $ in Millions	Jul. 01, 2018USD ($)$ / sharesshares
Business Acquisition [Line Items]
Total consideration	$ 9.5
Number of shares issued (in shares) | shares	66,824
Share issue price ($ per share) | $ / shares	$ 40.50
Cash paid for acquisition	$ 6.8
Goodwill	4.5
Intangible assets acquired	$ 4.9

Securities - Amortized Cost and

Securities - Amortized Cost and Estimated Fair Value of Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Available for sale
Available for sale, amortized cost	$ 594,077	$ 402,686
Available for sale, gross unrealized gains	2,445	4,994
Available for sale, gross unrealized losses	(10,734)	(3,148)
Available for sale, fair value	585,788	404,532
Held to maturity
Held to maturity, amortized cost	19,602	20,188
Securities held to maturity, fair value	19,567	20,265
Securities carried at fair value through income, fair value	11,273	12,033
State and municipal securities
Available for sale
Available for sale, amortized cost	119,570	125,909
Available for sale, gross unrealized gains	2,292	4,104
Available for sale, gross unrealized losses	(314)	(35)
Available for sale, fair value	121,548	129,978
Held to maturity
Held to maturity, amortized cost	19,602	20,188
Held to maturity, gross unrealized gains	0	77
Held to maturity, gross unrealized losses	(35)	0
Securities held to maturity, fair value	19,567	20,265
Securities carried at fair value through income, amortized cost	11,688	11,918
Securities carried at fair value through income, fair value	11,273	12,033
Corporate bonds
Available for sale
Available for sale, amortized cost	3,000	3,000
Available for sale, gross unrealized gains	80	136
Available for sale, gross unrealized losses	0	0
Available for sale, fair value	3,080	3,136
U.S. Government and agency securities
Available for sale
Available for sale, amortized cost	60,414
Available for sale, gross unrealized gains	0
Available for sale, gross unrealized losses	(117)
Available for sale, fair value	60,297
Commercial mortgage-backed securities
Available for sale
Available for sale, amortized cost	14,439
Available for sale, gross unrealized gains	0
Available for sale, gross unrealized losses	(71)
Available for sale, fair value	14,368
Residential mortgage-backed securities
Available for sale
Available for sale, amortized cost	180,867	105,132
Available for sale, gross unrealized gains	55	492
Available for sale, gross unrealized losses	(3,735)	(595)
Available for sale, fair value	177,187	105,029
Residential collateralized mortgage obligations
Available for sale
Available for sale, amortized cost	215,787	168,645
Available for sale, gross unrealized gains	18	262
Available for sale, gross unrealized losses	(6,497)	(2,518)
Available for sale, fair value	$ 209,308	$ 166,389

Securities - Unrealized Losses

Securities - Unrealized Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Fair Value
Less than 12 Months	$ 331,261	$ 118,920
12 Months or More	137,082	82,065
Total	468,343	200,985
Unrealized Loss
Less than 12 Months	(4,096)	(844)
12 Months or More	(6,638)	(2,304)
Total	(10,734)	(3,148)
State and municipal securities
Fair Value
Less than 12 Months	23,114	2,114
12 Months or More	1,517	1,210
Total	24,631	3,324
Unrealized Loss
Less than 12 Months	(258)	(5)
12 Months or More	(56)	(30)
Total	(314)	(35)
Fair Value
Less than 12 Months	14,349
12 Months or More	0
Total	14,349
Unrealized Loss
Less than 12 Months	(35)
12 Months or More	0
Total	(35)
U.S. Government and agency securities
Fair Value
Less than 12 Months	60,283
12 Months or More	0
Total	60,283
Unrealized Loss
Less than 12 Months	(117)
12 Months or More	0
Total	(117)
Commercial mortgage-backed securities
Fair Value
Less than 12 Months	14,368
12 Months or More	0
Total	14,368
Unrealized Loss
Less than 12 Months	(71)
12 Months or More	0
Total	(71)
Residential mortgage-backed securities
Fair Value
Less than 12 Months	118,323	46,018
12 Months or More	44,059	20,233
Total	162,382	66,251
Unrealized Loss
Less than 12 Months	(1,742)	(198)
12 Months or More	(1,993)	(397)
Total	(3,735)	(595)
Residential collateralized mortgage obligations
Fair Value
Less than 12 Months	115,173	70,788
12 Months or More	91,506	60,622
Total	206,679	131,410
Unrealized Loss
Less than 12 Months	(1,908)	(641)
12 Months or More	(4,589)	(1,877)
Total	$ (6,497)	$ (2,518)

Securities - Narrative (Details

Securities - Narrative (Details)	Sep. 30, 2018security
Investments, Debt and Equity Securities [Abstract]
Number of securities in an unrealized loss positions (in security)	173

Securities - Contractual Maturi

Securities - Contractual Maturities (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, due in one year or less, amortized cost	$ 58,119
Available-for-sale, due after one year through five years, amortized cost	28,088
Available-for-sale, due after five years through ten years, amortized cost	85,875
Available-for-sale, due after ten years, amortized cost	10,902
Available for sale, amortized cost	594,077	$ 402,686
Available-for-sale, due in one year or less, fair value	58,069
Available-for-sale, due after one year through five years, fair value	28,396
Available-for-sale, due after five years through ten years, fair value	87,421
Available-for-sale, due after ten years, fair value	11,039
Available for sale, fair value	585,788	404,532
Held to maturity
Held to maturity, due in one year or less, amortized cost	0
Held to maturity, due after one year through five years, amortized cost	14,384
Held to maturity, due after five years through ten years, amortized cost	0
Held to maturity, due after ten years, amortized cost	5,218
Held to maturity, amortized cost	19,602	20,188
Held to maturity, due in one year or less, fair value	0
Held to maturity, due after one year through five years, fair value	14,349
Held to maturity, due after five years through ten years, fair value	0
Held to maturity, due after ten years, fair value	5,218
Held to maturity, fair value	19,567	20,265
Commercial mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, without single maturity date, amortized cost	14,439
Available for sale, amortized cost	14,439
Available-for-sale, without single maturity date, fair value	14,368
Available for sale, fair value	14,368
Held to maturity
Held to maturity, without single maturity date, amortized cost	0
Held to maturity, without single maturity date, fair value	0
Residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, without single maturity date, amortized cost	180,867
Available for sale, amortized cost	180,867	105,132
Available-for-sale, without single maturity date, fair value	177,187
Available for sale, fair value	177,187	105,029
Held to maturity
Held to maturity, without single maturity date, amortized cost	0
Held to maturity, without single maturity date, fair value	0
Residential collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Available-for-sale, without single maturity date, amortized cost	215,787
Available for sale, amortized cost	215,787	168,645
Available-for-sale, without single maturity date, fair value	209,308
Available for sale, fair value	209,308	$ 166,389
Held to maturity
Held to maturity, without single maturity date, amortized cost	0
Held to maturity, without single maturity date, fair value	$ 0

Securities - Securities Pledged

Securities - Securities Pledged as Collateral (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Carrying value of securities pledged to secure public deposits
Schedule of Held-to-maturity Securities [Line Items]
Securities pledged as collateral	$ 325,897	$ 276,319
Carrying value of securities pledged to repurchase agreements
Schedule of Held-to-maturity Securities [Line Items]
Securities pledged as collateral	$ 38,631	$ 36,685

Loans - Schedule of Loans (Deta

Loans - Schedule of Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Loans and Leases Receivable Disclosure [Line Items]
Loans held for sale	$ 50,658		$ 65,343
Loans held for investment	3,601,081		3,241,031
Less: Allowance for loan losses	35,727	$ 34,151	37,083	$ 39,445	$ 41,634	$ 50,531
Net loans held for investment	3,565,354		3,203,948
Net deferred loan fees	2,900		1,000
Real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	2,154,454		1,976,262
Real estate | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	1,162,274		1,083,275
Less: Allowance for loan losses	9,729	9,768	8,998	9,074	9,201	8,718
Real estate | Construction/land/land development
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	406,249		322,404
Less: Allowance for loan losses	3,168	3,153	2,950	3,433	3,086	2,805
Real estate | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	585,931		570,583
Less: Allowance for loan losses	5,344	5,468	5,807	5,902	7,363	5,003
Commercial and industrial
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	1,193,035		989,220
Less: Allowance for loan losses	16,985	15,299	18,831	20,521	21,347	33,590
Mortgage warehouse lines of credit
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	233,325		255,044
Less: Allowance for loan losses	268	203	214	224	303	139
Consumer
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	20,267		20,505
Less: Allowance for loan losses	$ 233	$ 260	$ 283	$ 291	$ 334	$ 276

Loans - Narrative (Details)

Loans - Narrative (Details)	9 Months Ended
	Sep. 30, 2018USD ($)loan	Sep. 30, 2017USD ($)	Dec. 31, 2017USD ($)
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment at fair value	$ 20,444,000		$ 26,611,000
Amount committed to advance in connection with impaired loans	15,000
Nonaccrual mortgage loans held for sale recorded at fair value	$ 1,400,000		0
Number of loans that defaulted | loan	1
Nonperforming Financial Instruments
Loans and Leases Receivable Disclosure [Line Items]
Gross interest income that would have been recorded	$ 997,000	$ 2,400,000
Interest income	0	0
Outstanding principal balance	26,000	$ 0
Real estate | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment at fair value	19,700,000		21,000,000
Commercial and industrial
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment at fair value	$ 739,000		$ 5,600,000

Loans - Loans by Credit Quality

Loans - Loans by Credit Quality Indicator (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	$ 3,601,081	$ 3,241,031
Pass
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	3,483,284	3,125,722
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	40,678	24,078
Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	77,119	91,228
Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	0	3
Loss
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	0	0
Real estate
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	2,154,454	1,976,262
Real estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	2,117,458	1,935,344
Real estate | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	8,628	8,746
Real estate | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	28,368	32,172
Real estate | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	0	0
Real estate | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	0	0
Real estate | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	1,162,274	1,083,275
Real estate | Commercial real estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	1,139,571	1,055,911
Real estate | Commercial real estate | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	8,440	7,798
Real estate | Commercial real estate | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	14,263	19,566
Real estate | Commercial real estate | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	0	0
Real estate | Commercial real estate | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	0	0
Real estate | Construction/land/land development
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	406,249	322,404
Real estate | Construction/land/land development | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	403,159	318,488
Real estate | Construction/land/land development | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	160	170
Real estate | Construction/land/land development | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	2,930	3,746
Real estate | Construction/land/land development | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	0	0
Real estate | Construction/land/land development | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	0	0
Real estate | Residential real estate
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	585,931	570,583
Real estate | Residential real estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	574,728	560,945
Real estate | Residential real estate | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	28	778
Real estate | Residential real estate | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	11,175	8,860
Real estate | Residential real estate | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	0	0
Real estate | Residential real estate | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	0	0
Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	1,193,035	989,220
Commercial and industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	1,112,473	915,111
Commercial and industrial | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	32,050	15,332
Commercial and industrial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	48,512	58,777
Commercial and industrial | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	0	0
Commercial and industrial | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	0	0
Mortgage warehouse lines of credit
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	233,325	255,044
Mortgage warehouse lines of credit | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	233,325	255,044
Mortgage warehouse lines of credit | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	0	0
Mortgage warehouse lines of credit | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	0	0
Mortgage warehouse lines of credit | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	0	0
Mortgage warehouse lines of credit | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	0	0
Consumer
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	20,267	20,505
Consumer | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	20,028	20,223
Consumer | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	0	0
Consumer | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	239	279
Consumer | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	0	3
Consumer | Loss
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	$ 0	$ 0

Loans - Loan Portfolio Aging An

Loans - Loan Portfolio Aging Analysis (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	$ 24,846	$ 41,272
Current loans	3,576,235	3,199,759
Total loans receivable	3,601,081	3,241,031
Accruing loans 90 or more days past due	0	0
30-59 Days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	3,461	14,240
60-89 Days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	8,481	13,360
Loans past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	12,904	13,672
Real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	15,716	21,379
Current loans	2,138,738	1,954,883
Total loans receivable	2,154,454	1,976,262
Accruing loans 90 or more days past due	0	0
Real estate | 30-59 Days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	2,946	12,545
Real estate | 60-89 Days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	7,708	3,310
Real estate | Loans past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	5,062	5,524
Real estate | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	8,902	12,368
Current loans	1,153,372	1,070,907
Total loans receivable	1,162,274	1,083,275
Accruing loans 90 or more days past due	0	0
Real estate | Commercial real estate | 30-59 Days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	414	8,427
Real estate | Commercial real estate | 60-89 Days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	7,512	2,791
Real estate | Commercial real estate | Loans past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	976	1,150
Real estate | Construction/land/land development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	490	2,124
Current loans	405,759	320,280
Total loans receivable	406,249	322,404
Accruing loans 90 or more days past due	0	0
Real estate | Construction/land/land development | 30-59 Days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	25	1,488
Real estate | Construction/land/land development | 60-89 Days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	172
Real estate | Construction/land/land development | Loans past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	465	464
Real estate | Residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	6,324	6,887
Current loans	579,607	563,696
Total loans receivable	585,931	570,583
Accruing loans 90 or more days past due	0	0
Real estate | Residential real estate | 30-59 Days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	2,507	2,630
Real estate | Residential real estate | 60-89 Days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	196	347
Real estate | Residential real estate | Loans past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	3,621	3,910
Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	9,014	19,513
Current loans	1,184,021	969,707
Total loans receivable	1,193,035	989,220
Accruing loans 90 or more days past due	0	0
Commercial and industrial | 30-59 Days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	434	1,517
Commercial and industrial | 60-89 Days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	738	9,922
Commercial and industrial | Loans past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	7,842	8,074
Mortgage warehouse lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Current loans	233,325	255,044
Total loans receivable	233,325	255,044
Accruing loans 90 or more days past due	0	0
Mortgage warehouse lines of credit | 30-59 Days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Mortgage warehouse lines of credit | 60-89 Days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Mortgage warehouse lines of credit | Loans past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	116	380
Current loans	20,151	20,125
Total loans receivable	20,267	20,505
Accruing loans 90 or more days past due	0	0
Consumer | 30-59 Days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	81	178
Consumer | 60-89 Days past due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	35	128
Consumer | Loans past due 90 days or more
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	$ 0	$ 74

Loans - Allowance for Loan Loss

Loans - Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 34,151	$ 41,634	$ 37,083	$ 50,531
Beginning balance	1,009	6,296	3,541	19,697
Recoveries	1,472	331	2,490	896
Provision (Benefit)	1,113	3,776	(305)	7,715
Ending balance	35,727	39,445	35,727	39,445
Provision (benefit) for credit losses	504	3,327	(709)	8,094
Provision (release of provision) for off-balance sheet commitments	(609)	(449)	(404)	379
Real estate | Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	9,768	9,201	8,998	8,718
Beginning balance	42	272	51	272
Recoveries	7	12	223	88
Provision (Benefit)	(4)	133	559	540
Ending balance	9,729	9,074	9,729	9,074
Real estate | Construction/land/land development
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3,153	3,086	2,950	2,805
Beginning balance	228	0	228	0
Recoveries	5	1	6	4
Provision (Benefit)	238	346	440	624
Ending balance	3,168	3,433	3,168	3,433
Real estate | Residential real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	5,468	7,363	5,807	5,003
Beginning balance	398	1,306	407	1,326
Recoveries	68	21	117	98
Provision (Benefit)	206	(176)	(173)	2,127
Ending balance	5,344	5,902	5,344	5,902
Commercial and industrial
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	15,299	21,347	18,831	33,590
Beginning balance	290	4,629	2,759	17,962
Recoveries	1,370	271	2,090	670
Provision (Benefit)	606	3,532	(1,177)	4,223
Ending balance	16,985	20,521	16,985	20,521
Mortgage warehouse lines of credit
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	203	303	214	139
Beginning balance	0	0	0	0
Recoveries	0	0	0	0
Provision (Benefit)	65	(79)	54	85
Ending balance	268	224	268	224
Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	260	334	283	276
Beginning balance	51	89	96	137
Recoveries	22	26	54	36
Provision (Benefit)	2	20	(8)	116
Ending balance	$ 233	$ 291	$ 233	$ 291

Loans - Impaired Loans Evaluate

Loans - Impaired Loans Evaluated Individually and Collectively (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Period end allowance allocated to loans individually evaluated for impairment	$ 3,334	$ 4,807
Period end allowance allocated to loans collectively evaluated for impairment	32,393	32,276
Period end loan balance individually evaluated for impairment	32,291	39,658
Period end loan balance collectively evaluated for impairment	3,548,346	3,174,762
Loans held for investment at fair value	20,444	26,611
Real estate | Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Period end allowance allocated to loans individually evaluated for impairment	1,193	312
Period end allowance allocated to loans collectively evaluated for impairment	8,536	8,686
Period end loan balance individually evaluated for impairment	10,078	4,945
Period end loan balance collectively evaluated for impairment	1,132,491	1,057,330
Loans held for investment at fair value	19,700	21,000
Real estate | Construction/land/land development
Financing Receivable, Allowance for Credit Losses [Line Items]
Period end allowance allocated to loans individually evaluated for impairment	19	4
Period end allowance allocated to loans collectively evaluated for impairment	3,149	2,946
Period end loan balance individually evaluated for impairment	1,044	1,963
Period end loan balance collectively evaluated for impairment	405,205	320,441
Real estate | Residential real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Period end allowance allocated to loans individually evaluated for impairment	70	72
Period end allowance allocated to loans collectively evaluated for impairment	5,274	5,735
Period end loan balance individually evaluated for impairment	7,558	7,915
Period end loan balance collectively evaluated for impairment	578,373	562,668
Commercial and industrial
Financing Receivable, Allowance for Credit Losses [Line Items]
Period end allowance allocated to loans individually evaluated for impairment	2,029	4,356
Period end allowance allocated to loans collectively evaluated for impairment	14,956	14,475
Period end loan balance individually evaluated for impairment	13,381	24,598
Period end loan balance collectively evaluated for impairment	1,178,915	959,011
Loans held for investment at fair value	739	5,600
Mortgage warehouse lines of credit
Financing Receivable, Allowance for Credit Losses [Line Items]
Period end allowance allocated to loans individually evaluated for impairment	0	0
Period end allowance allocated to loans collectively evaluated for impairment	268	214
Period end loan balance individually evaluated for impairment	0	0
Period end loan balance collectively evaluated for impairment	233,325	255,044
Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Period end allowance allocated to loans individually evaluated for impairment	23	63
Period end allowance allocated to loans collectively evaluated for impairment	210	220
Period end loan balance individually evaluated for impairment	230	237
Period end loan balance collectively evaluated for impairment	$ 20,037	$ 20,268

Loans - Impaired Loans (Details

Loans - Impaired Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financing Receivable, Impaired [Line Items]
Unpaid contractual principal balance	$ 34,972	$ 43,810
Recorded investment with no allowance	15,208	16,647
Recorded investment with an allowance	17,083	23,011
Total recorded investment	32,291	39,658
Allocation of allowance for loan losses	3,334	4,807
Real estate
Financing Receivable, Impaired [Line Items]
Unpaid contractual principal balance	20,827	18,339
Recorded investment with no allowance	9,667	10,345
Recorded investment with an allowance	9,013	4,478
Total recorded investment	18,680	14,823
Allocation of allowance for loan losses	1,282	388
Real estate | Commercial real estate
Financing Receivable, Impaired [Line Items]
Unpaid contractual principal balance	10,950	6,047
Recorded investment with no allowance	2,304	1,782
Recorded investment with an allowance	7,774	3,163
Total recorded investment	10,078	4,945
Allocation of allowance for loan losses	1,193	312
Real estate | Construction/land/land development
Financing Receivable, Impaired [Line Items]
Unpaid contractual principal balance	1,344	2,268
Recorded investment with no allowance	737	1,813
Recorded investment with an allowance	307	150
Total recorded investment	1,044	1,963
Allocation of allowance for loan losses	19	4
Real estate | Residential real estate
Financing Receivable, Impaired [Line Items]
Unpaid contractual principal balance	8,533	10,024
Recorded investment with no allowance	6,626	6,750
Recorded investment with an allowance	932	1,165
Total recorded investment	7,558	7,915
Allocation of allowance for loan losses	70	72
Commercial and industrial
Financing Receivable, Impaired [Line Items]
Unpaid contractual principal balance	13,894	25,212
Recorded investment with no allowance	5,541	6,161
Recorded investment with an allowance	7,840	18,437
Total recorded investment	13,381	24,598
Allocation of allowance for loan losses	2,029	4,356
Consumer
Financing Receivable, Impaired [Line Items]
Unpaid contractual principal balance	251	259
Recorded investment with no allowance	0	141
Recorded investment with an allowance	230	96
Total recorded investment	230	237
Allocation of allowance for loan losses	$ 23	$ 63

Loans - Average Recorded Invest

Loans - Average Recorded Investment and Interest Recognized on Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	$ 32,193	$ 47,977	$ 34,325	$ 63,933
Interest Income Recognized	83	156	281	446
Real estate
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	19,039	17,179	19,129	18,155
Interest Income Recognized	28	59	119	191
Real estate | Commercial real estate
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	10,070	6,894	9,983	7,454
Interest Income Recognized	14	41	57	127
Real estate | Construction/land/land development
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	1,228	846	1,515	924
Interest Income Recognized	2	2	14	7
Real estate | Residential real estate
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	7,741	9,439	7,631	9,777
Interest Income Recognized	12	16	48	57
Commercial and industrial
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	12,891	30,545	14,932	45,536
Interest Income Recognized	54	95	158	250
Consumer
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	263	253	264	242
Interest Income Recognized	$ 1	$ 2	$ 4	$ 5

Loans - Non Performing (Nonaccr

Loans - Non Performing (Nonaccrual) Loans Held For Investment (Details) - Nonperforming Financial Instruments - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Total nonaccrual loans	$ 26,554	$ 23,802
Real estate
Financing Receivable, Recorded Investment [Line Items]
Total nonaccrual loans	17,031	10,008
Real estate | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Total nonaccrual loans	8,851	1,745
Real estate | Construction/land/land development
Financing Receivable, Recorded Investment [Line Items]
Total nonaccrual loans	960	1,097
Real estate | Residential real estate
Financing Receivable, Recorded Investment [Line Items]
Total nonaccrual loans	7,220	7,166
Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Total nonaccrual loans	9,285	13,512
Consumer
Financing Receivable, Recorded Investment [Line Items]
Total nonaccrual loans	$ 238	$ 282

Loans - Troubled Debt Restructu

Loans - Troubled Debt Restructurings (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financing Receivable, Modifications [Line Items]
Loans classified as troubled debt restructurings	$ 7,902	$ 16,856
Nonaccrual TDRs
Financing Receivable, Modifications [Line Items]
Loans classified as troubled debt restructurings	2,040	2,622
Performing TDRs
Financing Receivable, Modifications [Line Items]
Loans classified as troubled debt restructurings	$ 5,862	$ 14,234

Loans - Pre-Modification Balanc

Loans - Pre-Modification Balances of TDR (Details) - Nonperforming Financial Instruments $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018USD ($)loan	Sep. 30, 2017USD ($)loan	Sep. 30, 2018USD ($)loan	Sep. 30, 2017USD ($)loan
Financing Receivable, Modifications [Line Items]
Number of loans restructured | loan	4	4	10	15
Pre-modification recorded balance	$ 451	$ 221	$ 670	$ 11,158
Total Modifications	$ 347	$ 337	$ 550	$ 9,769
Real estate
Financing Receivable, Modifications [Line Items]
Number of loans restructured | loan		2	6	7
Pre-modification recorded balance		$ 130	$ 439	$ 2,814
Total Modifications		$ 246	$ 322	$ 2,286
Real estate | Commercial real estate
Financing Receivable, Modifications [Line Items]
Number of loans restructured | loan	1	0	1	3
Pre-modification recorded balance	$ 252	$ 0	$ 252	$ 2,643
Total Modifications	$ 150	$ 0	$ 150	$ 2,001
Real estate | Residential real estate
Financing Receivable, Modifications [Line Items]
Number of loans restructured | loan		2	5	4
Pre-modification recorded balance		$ 130	$ 187	$ 171
Total Modifications		$ 246	$ 172	$ 285
Commercial and industrial
Financing Receivable, Modifications [Line Items]
Number of loans restructured | loan	3	1	3	7
Pre-modification recorded balance	$ 199	$ 42	$ 198	$ 8,295
Total Modifications	197	$ 44	$ 197	$ 7,436
Consumer
Financing Receivable, Modifications [Line Items]
Number of loans restructured | loan		1	1	1
Pre-modification recorded balance		$ 49	$ 33	$ 49
Total Modifications		47	31	47
Term Concessions
Financing Receivable, Modifications [Line Items]
Total Modifications	332	87	381	9,519
Term Concessions | Real estate
Financing Receivable, Modifications [Line Items]
Total Modifications		40	199	2,080
Term Concessions | Real estate | Commercial real estate
Financing Receivable, Modifications [Line Items]
Total Modifications	150	0	150	2,001
Term Concessions | Real estate | Residential real estate
Financing Receivable, Modifications [Line Items]
Total Modifications		40	49	79
Term Concessions | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Total Modifications	182	0	182	7,392
Term Concessions | Consumer
Financing Receivable, Modifications [Line Items]
Total Modifications		47	0	47
Interest Rate Concessions
Financing Receivable, Modifications [Line Items]
Total Modifications	0	0	21	0
Interest Rate Concessions | Real estate
Financing Receivable, Modifications [Line Items]
Total Modifications		0	21	0
Interest Rate Concessions | Real estate | Commercial real estate
Financing Receivable, Modifications [Line Items]
Total Modifications	0	0	0	0
Interest Rate Concessions | Real estate | Residential real estate
Financing Receivable, Modifications [Line Items]
Total Modifications		0	21	0
Interest Rate Concessions | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Total Modifications	0	0	0	0
Interest Rate Concessions | Consumer
Financing Receivable, Modifications [Line Items]
Total Modifications		0	0	0
Combination
Financing Receivable, Modifications [Line Items]
Total Modifications	15	250	148	250
Combination | Real estate
Financing Receivable, Modifications [Line Items]
Total Modifications		206	102	206
Combination | Real estate | Commercial real estate
Financing Receivable, Modifications [Line Items]
Total Modifications	0	0	0	0
Combination | Real estate | Residential real estate
Financing Receivable, Modifications [Line Items]
Total Modifications		206	102	206
Combination | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Total Modifications	$ 15	44	15	44
Combination | Consumer
Financing Receivable, Modifications [Line Items]
Total Modifications		$ 0	$ 31	$ 0

Fair Value of Financial Instr_3

Fair Value of Financial Instruments - Fair Value of Assets and Liabilities Recorded on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	$ 585,788		$ 404,532
Securities carried at fair value through income	11,273		12,033
Loans held for sale	20,786		32,768
Loans at fair value	20,444		26,611
Mortgage servicing rights	26,163	$ 25,738	24,182	$ 26,271	$ 27,852	$ 29,385
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	585,788		404,532
Securities carried at fair value through income	11,273		12,033
Loans held for sale	20,786		32,768
Loans at fair value	20,444		26,611
Mortgage servicing rights	26,163		24,182
Other assets - derivatives	3,234		3,146
Total recurring fair value measurements - assets	667,688		503,272
Other liabilities - derivatives	(2,616)		(3,320)
Total recurring fair value measurements - liabilities	(2,616)		(3,320)
Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	0		0
Securities carried at fair value through income	0		0
Loans held for sale	0		0
Loans at fair value	0		0
Mortgage servicing rights	0		0
Other assets - derivatives	0		0
Total recurring fair value measurements - assets	0		0
Other liabilities - derivatives	0		0
Total recurring fair value measurements - liabilities	0		0
Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	545,588		362,517
Securities carried at fair value through income	0		0
Loans held for sale	20,786		32,768
Loans at fair value	0		0
Mortgage servicing rights	0		0
Other assets - derivatives	3,234		3,146
Total recurring fair value measurements - assets	569,608		398,431
Other liabilities - derivatives	(2,616)		(3,320)
Total recurring fair value measurements - liabilities	(2,616)		(3,320)
Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	40,200		42,015
Securities carried at fair value through income	11,273		12,033
Loans held for sale	0		0
Loans at fair value	20,444		26,611
Mortgage servicing rights	26,163		24,182
Other assets - derivatives	0		0
Total recurring fair value measurements - assets	98,080		104,841
Other liabilities - derivatives	0		0
Total recurring fair value measurements - liabilities	0		0
State and municipal securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	121,548		129,978
Securities carried at fair value through income	11,273		12,033
State and municipal securities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale			129,978
State and municipal securities | Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	0		0
State and municipal securities | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	81,348		87,963
State and municipal securities | Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	40,200		42,015
Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	3,080		3,136
Corporate bonds | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	3,080		3,136
Corporate bonds | Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	0		0
Corporate bonds | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	3,080		3,136
Corporate bonds | Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	0		0
U.S. Government and agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	60,297
U.S. Government and agency securities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	60,297
U.S. Government and agency securities | Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	0
U.S. Government and agency securities | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	60,297
U.S. Government and agency securities | Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	0
Commercial mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	14,368
Commercial mortgage-backed securities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	14,368
Commercial mortgage-backed securities | Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	0
Commercial mortgage-backed securities | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	14,368
Commercial mortgage-backed securities | Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	0
Residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	177,187		105,029
Residential mortgage-backed securities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	177,187		105,029
Residential mortgage-backed securities | Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	0		0
Residential mortgage-backed securities | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	177,187		105,029
Residential mortgage-backed securities | Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	0		0
Residential collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	209,308		166,389
Residential collateralized mortgage obligations | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	209,308		166,389
Residential collateralized mortgage obligations | Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	0		0
Residential collateralized mortgage obligations | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	209,308		166,389
Residential collateralized mortgage obligations | Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	$ 0		$ 0

Fair Value of Financial Instr_4

Fair Value of Financial Instruments - Changes in Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Loans at Fair Value
Changes in Level 3 assets and liabilities measured at fair value on a recurring basis
Balance at beginning of period	$ 26,611	$ 33,693
Gain (loss) recognized in AOCI	0	0
Purchases, issuances, sales and settlements:
Originations	0
Purchases	0	0
Sales		(2,516)
Settlements	(5,679)	(3,535)
Balance at end of period	20,444	27,180
Loans at Fair Value | Mortgage banking revenue
Changes in Level 3 assets and liabilities measured at fair value on a recurring basis
Gain (loss) recognized in earnings	0	0
Loans at Fair Value | Other noninterest income
Changes in Level 3 assets and liabilities measured at fair value on a recurring basis
Gain (loss) recognized in earnings	(488)	(462)
MSRs
Changes in Level 3 assets and liabilities measured at fair value on a recurring basis
Balance at beginning of period	24,182	29,385
Gain (loss) recognized in AOCI	0	0
Purchases, issuances, sales and settlements:
Originations	1,537
Purchases	0	2,184
Sales		0
Settlements	0	0
Balance at end of period	26,163	26,271
MSRs | Mortgage banking revenue
Changes in Level 3 assets and liabilities measured at fair value on a recurring basis
Gain (loss) recognized in earnings	444	(5,298)
MSRs | Other noninterest income
Changes in Level 3 assets and liabilities measured at fair value on a recurring basis
Gain (loss) recognized in earnings	0	0
Securities Available for Sale
Changes in Level 3 assets and liabilities measured at fair value on a recurring basis
Balance at beginning of period	42,015	43,858
Gain (loss) recognized in AOCI	(219)	277
Purchases, issuances, sales and settlements:
Originations	0
Purchases	259	275
Sales		0
Settlements	(1,855)	(2,171)
Balance at end of period	40,200	42,239
Securities Available for Sale | Mortgage banking revenue
Changes in Level 3 assets and liabilities measured at fair value on a recurring basis
Gain (loss) recognized in earnings	0	0
Securities Available for Sale | Other noninterest income
Changes in Level 3 assets and liabilities measured at fair value on a recurring basis
Gain (loss) recognized in earnings	0	0
Securities carried at fair value through income
Changes in Level 3 assets and liabilities measured at fair value on a recurring basis
Balance at beginning of period	12,033	12,511
Gain (loss) recognized in AOCI	0	0
Purchases, issuances, sales and settlements:
Originations	0
Purchases	0	0
Sales		0
Settlements	(230)	(204)
Balance at end of period	11,273	12,272
Securities carried at fair value through income | Mortgage banking revenue
Changes in Level 3 assets and liabilities measured at fair value on a recurring basis
Gain (loss) recognized in earnings	0	0
Securities carried at fair value through income | Other noninterest income
Changes in Level 3 assets and liabilities measured at fair value on a recurring basis
Gain (loss) recognized in earnings	$ (530)	$ (35)

Fair Value of Financial Instr_5

Fair Value of Financial Instruments - Assumptions Used to Value Mortgage Servicing Rights (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Prepayment speed	8.80%	10.80%
Discount rate	9.97%	9.33%

Fair Value of Financial Instr_6

Fair Value of Financial Instruments - Difference Between Fair Value and Unpaid Principal Balance (Details) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Fair Value, Option, Quantitative Disclosures [Line Items]
Aggregate Fair Value	$ 52,503,000	$ 71,412,000
Aggregate Unpaid Principal Balance	52,590,000	70,176,000
Difference	(87,000)	1,236,000
Loans for which the fair value had been elected that were designated as nonaccrual or past due 90 days or more	0	0
Loans held for sale
Fair Value, Option, Quantitative Disclosures [Line Items]
Aggregate Fair Value	20,786,000	32,768,000
Aggregate Unpaid Principal Balance	20,538,000	32,216,000
Difference	248,000	552,000
Loans, 90 days or more past due	1,400,000	2,400,000
Commercial and industrial loans held for investment
Fair Value, Option, Quantitative Disclosures [Line Items]
Aggregate Fair Value	739,000	5,611,000
Aggregate Unpaid Principal Balance	739,000	5,591,000
Difference	0	20,000
Commercial real estate loans held for investment
Fair Value, Option, Quantitative Disclosures [Line Items]
Aggregate Fair Value	19,705,000	21,000,000
Aggregate Unpaid Principal Balance	19,625,000	20,451,000
Difference	80,000	549,000
Securities carried at fair value through income
Fair Value, Option, Quantitative Disclosures [Line Items]
Aggregate Fair Value	11,273,000	12,033,000
Aggregate Unpaid Principal Balance	11,688,000	11,918,000
Difference	(415,000)	115,000
US Government Agencies Debt Securities
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans, 90 days or more past due	$ 1,200,000	$ 1,800,000

Fair Value of Financial Instr_7

Fair Value of Financial Instruments - Changes in Fair Value of Assets Classified in the Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Mortgage banking revenue
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Fair value option impact on noninterest income	$ (251)	$ 80	$ (304)	$ 100
Other income
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Fair value option impact on noninterest income	(241)	(351)	(1,018)	(497)
Noninterest income
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Fair value option impact on noninterest income	(492)	(271)	(1,322)	(397)
Loans at fair value held for investment | Other income
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Fair value option impact on noninterest income	(101)	(288)	(488)	(462)
Securities carried at fair value through income | Other income
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Fair value option impact on noninterest income	$ (140)	$ (63)	$ (530)	$ (35)

Fair Value of Financial Instr_8

Fair Value of Financial Instruments - Narrative (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities without readily determinable fair value	$ 39,300
Liability to repurchase past due GNMA loans	29,900	$ 32,600
Fair value of impaired loans	32,291	39,658
Real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of impaired loans	18,680	14,823
Fair Value, Measurements, Nonrecurring | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of impaired loans	15,200	18,200
Foreclosed assets	3,300	$ 499
Residential real estate | Fair Value, Measurements, Nonrecurring | Fair Value, Inputs, Level 3 | Real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Residential mortgage loans in the process of foreclosure	$ 2,300
Minimum | Measurement Input, Credit Spread
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Credit spread, securities at fair value through income	126.00%
Credit spread, loans held-for-investment	290.00%	283.00%
Maximum | Measurement Input, Credit Spread
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Credit spread, securities at fair value through income	227.00%
Credit spread, loans held-for-investment	413.00%	413.00%
Carrying Value | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Non-marketable equity securities held in other financial institutions	$ 39,283	$ 22,967

Fair Value of Financial Instr_9

Fair Value of Financial Instruments - Carrying Value and Estimated Fair Values of Financial Instruments Not Measured at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities held to maturity	$ 19,567	$ 20,265
Loans held for investment at fair value	20,444	26,611
Carrying Value | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	140,437	187,187
Carrying Value | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities held to maturity	19,602	20,188
Non-marketable equity securities held in other financial institutions	39,283	22,967
Accrued interest and loan fees receivable	14,618	10,719
Deposits	3,727,158	3,512,014
FHLB advances and other borrowings	358,532	144,357
Junior subordinated debentures	9,637	9,619
Accrued interest payable	2,564	2,424
Carrying Value | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held for investment, net	3,544,910	3,177,337
Estimated Fair Value | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	140,437	187,187
Estimated Fair Value | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities held to maturity	19,567	20,265
Non-marketable equity securities held in other financial institutions	39,283	22,967
Accrued interest and loan fees receivable	14,618	10,719
Deposits	3,468,832	3,352,213
FHLB advances and other borrowings	356,878	145,330
Junior subordinated debentures	10,724	14,132
Accrued interest payable	2,564	2,424
Estimated Fair Value | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held for investment, net	$ 3,433,735	$ 3,238,872

Mortgage Banking - Mortgage Ban

Mortgage Banking - Mortgage Banking Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Mortgage Banking [Abstract]
Origination	$ 194	$ 358	$ 646	$ 963
Gain on sale of loans held for sale	1,761	3,121	5,121	8,541
Servicing	1,728	1,963	5,339	6,072
Total gross mortgage revenue	3,683	5,442	11,106	15,576
Mortgage derivatives gain (loss)	(283)	(136)	(511)	554
MSR change due to payoffs and paydowns	(960)	(1,027)	(2,791)	(3,117)
MSR and hedge fair value adjustment	181	(41)	(497)	30
Gain (loss) on MSR sale	0	(343)	25	(343)
Mortgage banking revenue	$ 2,621	$ 3,895	$ 7,332	$ 12,700

Mortgage Banking - Activity in

Mortgage Banking - Activity in Mortgage Servicing Rights (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance at beginning of period	$ 25,738	$ 27,852	$ 24,182	$ 29,385
Origination of servicing rights	544	748	1,537	2,184
Change in fair value, including amortization	(119)	(2,329)	444	(5,298)
Balance at end of period	$ 26,163	$ 26,271	$ 26,163	$ 26,271

Mortgage Banking - Narrative (D

Mortgage Banking - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Mortgage Banking [Abstract]
Annual servicing fee income rate			0.28%
Mortgage loan servicing putback expenses	$ 0	$ 0	$ 0	$ 52,000
Reserve for mortgage loan servicing putback expenses	196,000		196,000		$ 254,000
Liability to repurchase past due GNMA loans	$ 29,900,000		$ 29,900,000		$ 32,600,000

Borrowings (Details)

Borrowings (Details) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Total FHLB advances and other borrowings	$ 358,532,000	$ 144,357,000
GNMA repurchase liability
Debt Instrument [Line Items]
Total FHLB advances and other borrowings	29,872,000	32,575,000
Long-term FHLB advances
Debt Instrument [Line Items]
Total FHLB advances and other borrowings	294,851,000	75,604,000
Long-term FHLB advances | FHLB Advance, Maturing 2033
Debt Instrument [Line Items]
Advance	250,000,000
Junior subordinated debentures
Debt Instrument [Line Items]
Junior subordinated debentures	9,637,000	9,619,000
Overnight repurchase agreements with depositors
Debt Instrument [Line Items]
Total FHLB advances and other borrowings	$ 33,809,000	$ 36,178,000

Derivative Financial Instrume_3

Derivative Financial Instruments - Fair Value of Derivative Instruments on the Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Derivatives, Fair Value [Line Items]
Notional Amounts	$ 503,143	$ 546,910
Fair Values	291	(215)
Interest Rate Swap | Not Designated as Hedging Instrument | Other Assets
Derivatives, Fair Value [Line Items]
Notional Amounts	170,792	132,959
Fair Values	2,373	2,314
Interest Rate Swap | Not Designated as Hedging Instrument | Other Liabilities
Derivatives, Fair Value [Line Items]
Notional Amounts	166,178	159,479
Fair Values	(2,350)	(3,221)
Forward Commitment to Purchase | Not Designated as Hedging Instrument | Other Liabilities
Derivatives, Fair Value [Line Items]
Notional Amounts	100,000	160,000
Fair Values	(266)	(50)
Forward Commitment to Sell | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional Amounts	35,550	57,400
Fair Values	119	(49)
Interest Rate Lock Commitments | Not Designated as Hedging Instrument | Other Assets
Derivatives, Fair Value [Line Items]
Notional Amounts	30,623	37,072
Fair Values	415	791
Cash Flow Hedging | Interest Rate Swap | Designated as Hedging Instrument | Other Assets
Derivatives, Fair Value [Line Items]
Notional Amounts	10,500	10,500
Fair Values	$ 327	$ 41

Derivative Financial Instrume_4

Derivative Financial Instruments - Weighted-average Rates Paid and Received (Details) - Interest Rate Swap	Sep. 30, 2018
Designated as Hedging Instrument | Interest Rate Paid
Derivative [Line Items]
Weighted-average rates	4.81%
Designated as Hedging Instrument | Interest Rate Received
Derivative [Line Items]
Weighted-average rates	5.07%
Financial Institution | Not Designated as Hedging Instrument | Interest Rate Paid
Derivative [Line Items]
Weighted-average rates	4.80%
Financial Institution | Not Designated as Hedging Instrument | Interest Rate Received
Derivative [Line Items]
Weighted-average rates	4.13%
Customer | Not Designated as Hedging Instrument | Interest Rate Paid
Derivative [Line Items]
Weighted-average rates	4.14%
Customer | Not Designated as Hedging Instrument | Interest Rate Received
Derivative [Line Items]
Weighted-average rates	4.79%

Derivative Financial Instrume_5

Derivative Financial Instruments - Gains and Losses Recognized on Derivative Instruments Not Designated as Hedging Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Mortgage banking revenue
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized on derivatives not designated as hedging instruments	$ (791)	$ 292	$ (2,998)	$ 1,346
Noninterest income
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized on derivatives not designated as hedging instruments	$ 192	$ 141	$ 931	$ 353

Derivative Financial Instrume_6

Derivative Financial Instruments - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Cash collateral on deposit	$ 250	$ 7,000

Stock and Incentive Compensat_3

Stock and Incentive Compensation Plans - Narrative (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Outstanding stock options term (does not exceed)	20 years
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Shares surrendered to cover taxes owed upon the vesting of restricted stock awards (in shares)	910	5,216
Unrecognized compensation cost	$ 3.5
Unrecognized compensation cost weighted average period for recognition	2 years 1 month 20 days
2012 Plan
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Maximum number of common stock available for issuance (in shares)	1,054,172
Minimum
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Vesting period from the date of grant or merger	0 years
Minimum | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Service period in which time-vested awards are earned	1 year
Maximum
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Vesting period from the date of grant or merger	10 years
Maximum | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Service period in which time-vested awards are earned	5 years

Stock and Incentive Compensat_4

Stock and Incentive Compensation Plans - Share-based Compensation Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock compensation expense	$ 411	$ 265	$ 828	$ 758
Related tax benefits recognized in net income	86	93	174	$ 265
Common stock options forfeited (in shares)				5,546
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock compensation expense	411	265	828	$ 788
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock compensation expense	$ 0	$ 0	$ 0	$ (30)

Stock and Incentive Compensat_5

Stock and Incentive Compensation Plans - Time-vested Award Activity (Details) - Restricted Stock - $ / shares	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Shares
Nonvested shares, beginning balance (in shares)	61,293	84,019
Granted (in shares)	83,500	24,206
Vested (in shares)	(18,982)	(24,632)
Forfeited (in shares)	(2,001)	(3,636)
Nonvested shares, ending balance (in shares)	123,810	79,957
Weighted Average Grant-Date Fair Value
Nonvested shares, weighted average grant-date fair value, ending balance ($ per share)	$ 24.61	$ 24.22
Granted, weighted average grant-date fair value ($ per share)	38.29	24.60
Vested, weighted average grant-date fair value ($ per share)	24.31	22.42
Forfeited, weighted average grant-date fair value ($ per share)	37.47	24.12
Nonvested shares, weighted average grant-date fair value, beginning balance ($ per share)	$ 33.67	$ 24.37

Stock and Incentive Compensat_6

Stock and Incentive Compensation Plans - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016
Number of Shares
Outstanding, beginning of period (in shares)	319,500	358,638	358,638
Forfeited and expired (in shares)		(16,638)
Exercised (in shares)	(8,000)
Outstanding, end of period (in shares)	311,500	342,000	319,500	358,638
Exercisable (in shares)	311,500
Weighted Average Exercise Price
Outstanding, beginning of period ($ per share)	$ 10.65	$ 11.37	$ 11.37
Forfeited and expired ($ per share)		23.89
Exercised ($ per share)	12.29
Outstanding, end of period ($ per share)	10.61	$ 10.76	$ 10.65	$ 11.37
Exercisable, end ($ per share)	$ 10.61
Weighted average remaining contractual term (in years)	6 years 5 months 1 day	6 years 11 months 1 day	7 years 26 days	7 years 9 months 15 days
Weighted average remaining contractual term, exercisable (in years)	6 years 5 months 1 day
Aggregate intrinsic value	$ 8,423	$ 5,390	$ 4,840	$ 3,844
Aggregate intrinsic value, exercisable	$ 8,423

Income Taxes - Provision for In

Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Federal income taxes:
Current	$ 901	$ (4,551)	$ 2,939	$ (5,472)
Deferred	1,493	1,890	4,652	5,908
State income taxes:
Current	147	(35)	491	192
Deferred	27	8	30	36
Income tax expense (benefit)	$ 2,568	$ (2,688)	$ 8,112	$ 664
Effective income tax rate	17.30%	55.30%	17.40%	6.90%

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification from accumulated other comprehensive income	$ 6,197	$ (1,307)
Reclassification to retained earnings	$ 179,178	145,122
Accounting Standards Update 2018-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification from accumulated other comprehensive income		282
Reclassification to retained earnings		$ 282

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Stockholders' equity, beginning balance			$ 420,351	$ 420,093
Net change	$ (2,145)	$ (951)	(7,786)	(37)
Stockholders' equity, ending balance	531,919	424,508	531,919	424,508
Unrealized gains on AFS securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Stockholders' equity, beginning balance			1,280	3,505
Net change			(8,012)	(37)
Reclassification of tax effects related to the adoption of ASU 2018-02, current			(293)
Reclassification of tax effects related to the adoption of ASU 2018-02, deferred			569
Stockholders' equity, ending balance	(6,456)	3,468	(6,456)	3,468
Cash flow hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Stockholders' equity, beginning balance			27	(42)
Net change			226	0
Reclassification of tax effects related to the adoption of ASU 2018-02, current			17
Reclassification of tax effects related to the adoption of ASU 2018-02, deferred			(11)
Stockholders' equity, ending balance	259	(42)	259	(42)
Accumulated other comprehensive income
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Stockholders' equity, beginning balance			1,307	3,463
Net change			(7,786)	(37)
Reclassification of tax effects related to the adoption of ASU 2018-02, current			(276)
Reclassification of tax effects related to the adoption of ASU 2018-02, deferred			558
Stockholders' equity, ending balance	$ (6,197)	$ 3,426	$ (6,197)	$ 3,426

Stockholders' Equity (Details)

Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands	Jul. 01, 2018	Jun. 08, 2018	May 09, 2018	Sep. 30, 2018	Sep. 30, 2018
Subsidiary, Sale of Stock [Line Items]
Sale of stock, price per share (usd per share)	$ 40.50
Sale of stock, net proceeds			$ 96,300
Stock issuance - RCF acquisition					$ 2,706
Aggregate redemption price amount					$ 48,260
Common Stock
Subsidiary, Sale of Stock [Line Items]
Stock issuance - RCF acquisition (in shares)	66,824				66,824
Stock issuance - RCF acquisition	$ 334				$ 334
Conversion of shares (shares)					901,644
Additional Paid-In Capital
Subsidiary, Sale of Stock [Line Items]
Stock issuance - RCF acquisition	$ 2,400				$ 2,372
Common Stock
Subsidiary, Sale of Stock [Line Items]
Sale of stock, price per share (usd per share)			$ 34
Sale of stock, shares issued (shares)			3,045,426
Conversion of shares (shares)				901,644
Common Stock | IPO
Subsidiary, Sale of Stock [Line Items]
Sale of stock, shares issued (shares)			1,136,176
Common Stock | Over-Allotment Option
Subsidiary, Sale of Stock [Line Items]
Sale of stock, shares issued (shares)			545,426
SBLF Preferred Stock
Subsidiary, Sale of Stock [Line Items]
Shares redeemed (shares)		48,260
Dividend rate (percent)		9.00%
Aggregate redemption price amount		$ 49,100
Accrued dividends		$ 808
Shares outstanding (shares)				0	0

Capital and Regulatory Matter_2

Capital and Regulatory Matters (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Origin Bancorp, Inc.
Common Equity Tier 1 Capital to Risk-Weighted Assets
Actual, amount	$ 502,273	$ 360,069
Actual, ratio	11.79%	9.35%
Minimum capital required, amount	$ 298,171	$ 269,570
Minimum capital required, ratio	7.00%	7.00%
Tier 1 Capital to Risk-Weighted Assets
Actual, amount	$ 511,584	$ 433,338
Actual, ratio	12.01%	11.25%
Minimum capital required, amount	$ 362,067	$ 327,411
Minimum capital required, ratio	8.50%	8.50%
Total Capital to Risk-Weighted Assets
Actual, amount	$ 548,923	$ 472,437
Actual, ratio	12.88%	12.26%
Minimum capital required, amount	$ 447,422	$ 404,616
Minimum capital required, ratio	10.50%	10.50%
Leverage Ratio
Actual, amount	$ 511,584	$ 433,338
Actual, ratio	11.34%	10.53%
Minimum capital required, amount	$ 180,455	$ 164,611
Minimum capital required, ratio	4.00%	4.00%
Origin Bank | Origin Bank
Common Equity Tier 1 Capital to Risk-Weighted Assets
Actual, amount	$ 494,111	$ 416,175
Actual, ratio	11.63%	10.82%
Minimum capital required, amount	$ 297,276	$ 269,244
Minimum capital required, ratio	7.00%	7.00%
Well capitalized, amount	$ 276,042	$ 250,012
Well capitalized, ratio	6.50%	6.50%
Tier 1 Capital to Risk-Weighted Assets
Actual, amount	$ 494,111	$ 416,175
Actual, ratio	11.63%	10.82%
Minimum capital required, amount	$ 360,978	$ 326,940
Minimum capital required, ratio	8.50%	8.50%
Well capitalized, amount	$ 339,744	$ 307,708
Well capitalized, ratio	8.00%	8.00%
Total Capital to Risk-Weighted Assets
Actual, amount	$ 531,450	$ 455,274
Actual, ratio	12.51%	11.84%
Minimum capital required, amount	$ 445,915	$ 403,748
Minimum capital required, ratio	10.50%	10.50%
Well capitalized, amount	$ 424,681	$ 384,522
Well capitalized, ratio	10.00%	10.00%
Leverage Ratio
Actual, amount	$ 494,111	$ 416,175
Actual, ratio	10.98%	10.13%
Minimum capital required, amount	$ 179,955	$ 164,334
Minimum capital required, ratio	4.00%	4.00%
Well capitalized, amount	$ 224,944	$ 205,418
Well capitalized, ratio	5.00%	5.00%
Aggregate dividends without prior regulatory approval	$ 43,100

Commitments and Contingencies -

Commitments and Contingencies - Off-Balance Sheet Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Commitments to extend credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet financial instrument	$ 1,247,579	$ 1,068,088
Standby letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet financial instrument	$ 81,432	$ 79,893

Commitments and Contingencies_2

Commitments and Contingencies - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Credit card guarantees	$ 747	$ 1,000
FHLB letters of credit	130,000	185,000
Lending-related Commitments
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Reserve for lending related commitments	$ 1,600	$ 2,000