Origin Bancorp (OBK) 10-K 28 Feb 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Feb. 25, 2019	Jun. 29, 2018
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	FY
Trading Symbol	OBNK
Entity Registrant Name	ORIGIN BANCORP, INC.
Entity CIK	1,516,912
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	No
Entity Filer Category	Non-accelerated Filer
Entity Emerging Growth Company	true
Entity Small Business	false
Entity Ex Transition Period	true
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		23,747,535
Entity Public Float			$ 768

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Assets
Cash and due from banks	$ 71,008	$ 78,489
Interest-bearing deposits in banks	45,670	108,698
Total cash and cash equivalents	116,678	187,187
Securities:
Available for sale	575,644	404,532
Held to maturity (fair value of $19,136 and $20,265, respectively)	19,169	20,188
Securities carried at fair value through income	11,361	12,033
Total securities	606,174	436,753
Non-marketable equity securities held in other financial institutions	42,149	22,967
Loans held for sale ($21,562 and $32,768 at fair value, respectively)	52,210	65,343
Loans, net of allowance for loan losses of $34,203 and $37,083, respectively ($18,571 and $26,611 at fair value, respectively)	3,754,902	3,203,948
Premises and equipment, net	75,014	77,408
Mortgage servicing rights	25,114	24,182
Cash surrender value of bank-owned life insurance	32,706	27,993
Goodwill and other intangible assets, net	32,861	24,336
Accrued interest receivable and other assets	83,768	83,878
Total assets	4,821,576	4,153,995
Liabilities and Stockholders' Equity
Noninterest-bearing deposits	951,015	832,853
Interest-bearing deposits	2,027,720	2,060,068
Time deposits	804,403	619,093
Total deposits	3,783,138	3,512,014
Federal Home Loan Bank (FHLB) advances and other borrowings	445,224	144,357
Junior subordinated debentures, net	9,644	9,619
Accrued expenses and other liabilities	33,791	32,663
Total liabilities	4,271,797	3,698,653
Commitments and contingencies	0	34,991
Stockholders' equity:
Common stock ($5.00 par value; 50,000,000 shares authorized; 23,726,559 and 19,518,752 shares issued at December 31, 2018, and December 31, 2017, respectively)	118,633	97,594
Additional paid‑in capital	242,041	146,061
Retained earnings	191,585	145,122
Accumulated other comprehensive (loss) income	(2,480)	1,307
Total stockholders' equity	549,779	455,342
Less: Retirement Plan-owned (formerly ESOP) shares	0	34,991
Total stockholders' equity	549,779	420,351
Total liabilities and stockholders' equity	4,821,576	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	Dec. 31, 2018	Dec. 31, 2017
Securities held to maturity, fair value	$ 19,136	$ 20,265
Loans held for sale at fair value	21,562	32,768
Allowance for loan losses	34,203	37,083
Loans at fair value	$ 18,571	$ 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)	23,726,559	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	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Interest and dividend income
Interest and fees on loans	$ 169,384	$ 138,858	$ 127,846
Investment securities-taxable	9,843	6,233	4,970
Investment securities-nontaxable	4,465	4,766	4,900
Interest and dividend income on assets held in other financial institutions	4,396	2,736	1,435
Federal funds sold	8	0	0
Total interest and dividend income	188,096	152,593	139,151
Interest expense
Interest-bearing deposits	29,671	19,314	15,250
FHLB advances and other borrowings	4,420	2,426	2,672
Subordinated debentures	553	548	546
Total interest expense	34,644	22,288	18,468
Net interest income	153,452	130,305	120,683
Provision for credit losses	1,014	8,336	30,078
Net interest income after provision for credit losses	152,438	121,969	90,605
Noninterest income
Mortgage banking revenue	9,620	15,806	14,869
(Loss) gain on sales of securities, net	(8)	0	136
Loss on non-mortgage loans held for sale, net	0	(12,708)	0
Other fee income	1,811	2,176	2,970
Other income	7,513	4,064	6,614
Total noninterest income	41,240	29,187	41,868
Noninterest expense
Salaries and employee benefits	80,487	70,862	63,605
Occupancy and equipment, net	15,445	15,915	17,127
Data processing	6,182	5,209	4,837
Electronic banking	2,883	2,056	2,365
Communications	2,028	1,928	2,474
Advertising and marketing	4,275	2,923	2,849
Professional services	3,269	4,722	4,587
Regulatory assessments	2,457	2,867	3,229
Loan related expenses	3,039	4,419	3,873
Office and operations	5,881	5,498	6,003
Litigation settlement	0	10,000	0
Other expenses	5,290	4,275	5,758
Total noninterest expense	131,236	130,674	116,707
Income (loss) before income taxes	62,442	20,482	15,766
Income tax expense	10,837	5,813	2,916
Net income (loss)	51,605	14,669	12,850
Preferred stock dividends	1,923	4,461	4,398
Net income allocated to participating stockholders	1,029	377	316
Net income available to common stockholders	$ 48,653	$ 9,831	$ 8,136
Basic earnings per common share ($ per share)	$ 2.21	$ 0.51	$ 0.46
Diluted earnings per common share ($ per share)	$ 2.20	$ 0.50	$ 0.46
Service charges and fees
Noninterest income
Revenue from contracts with customers	$ 12,754	$ 11,606	$ 11,019
Insurance commission and fee income
Noninterest income
Revenue from contracts with customers	9,720	7,207	6,775
(Loss) gain on sales and disposals of other assets, net
Noninterest income
Revenue from contracts with customers	$ (170)	$ 1,036	$ (515)

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 51,605	$ 14,669	$ 12,850
Securities available for sale and transferred securities:
Net unrealized holding losses arising during the period	(5,260)	(3,414)	(2,599)
Net losses realized as a yield adjustment in interest on investment securities	(10)	(10)	(9)
Reclassification adjustment for net losses (gains) included in net income	8	0	(136)
Change in the net unrealized losses on investment securities, before tax	(5,262)	(3,424)	(2,744)
Income tax benefit related to net unrealized losses arising during the period	(1,105)	(1,199)	(960)
Change in the net unrealized loss on investment securities, net of tax	(4,157)	(2,225)	(1,784)
Cash flow hedges:
Net unrealized gains (losses) arising during the period	104
Net unrealized gains (losses) arising during the period		4	(60)
Reclassification adjustment for losses included in net income	7
Reclassification adjustment for losses included in net income		102	157
Change in the net unrealized gain on cash flow hedges, before tax	111
Change in the net unrealized gain on cash flow hedges, before tax		106	97
Income tax expense related to net unrealized gains on cash flow hedges	23
Income tax expense related to net unrealized gains on cash flow hedges		37	34
Change in the net unrealized gain on cash flow hedges, net of tax	88
Change in the net unrealized gain on cash flow hedges, net of tax		69	63
Other comprehensive loss, net of tax	(4,069)	(2,156)	(1,721)
Comprehensive income	$ 47,536	$ 12,513	$ 11,129

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	Unallocated Retirement Plan Shares	Accumulated Other Comprehensive Income (loss)	Less: Retirement Plan-Owned Shares
Common shares outstanding, beginning balance (in shares) at Dec. 31, 2015	[1]				17,399,534
Stockholders' equity, beginning balance at Dec. 31, 2015	[1]	$ 372,933			$ 43,549	$ 48,260	$ 15,000	$ 155,584	$ 131,328			$ (465)	$ 5,184	$ (25,507)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		12,850							12,850			0
Other comprehensive income (loss), net of tax		(1,721)											(1,721)
Recognition of stock compensation, net (in shares)					89,269
Recognition of stock compensation, net		1,545			$ 484			1,061
Net change in Retirement Plan-owned (formerly ESOP) shares (in shares)					40,292
Net change in Retirement Plan-owned (formerly ESOP) shares		509										465		44
Net change in fair value of Retirement Plan-owned (formerly ESOP) shares		(3,101)												(3,101)
Stock issuance - common (in shares)					1,954,623
Stock issuance		41,809			$ 9,773		1,998	32,036
Two for one common stock split in the form of a 100% dividend		0			$ 43,613			(43,613)
Dividends declared - preferred stock			$ (4,290)	$ (108)						$ (4,290)	$ (108)
Dividends declared - common stock		(2,331)							(2,331)
Common shares outstanding, ending balance (in shares) at Dec. 31, 2016					19,483,718
Stockholders' equity, ending balance at Dec. 31, 2016		420,093			$ 97,419	48,260	16,998	145,068	137,449			0	3,463	(28,564)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		14,669							14,669
Other comprehensive income (loss), net of tax		(2,156)											(2,156)
Recognition of stock compensation, net (in shares)					35,034
Recognition of stock compensation, net		925			$ 175			750
Net change in fair value of Retirement Plan-owned (formerly ESOP) shares		(6,427)												(6,427)
Tax benefit of stock issuance costs		243						243
Dividends declared - preferred stock			(4,344)	(117)						(4,344)	(117)
Dividends declared - common stock		(2,535)							(2,535)
Common shares outstanding, ending balance (in shares) at Dec. 31, 2017					19,518,752
Stockholders' equity, ending balance at Dec. 31, 2017		420,351			$ 97,594	48,260	16,998	146,061	145,122			0	1,307	(34,991)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reclassification of tax effects related to the adoption of ASU 2018-02		0
Net income		51,605							51,605
Other comprehensive income (loss), net of tax		(4,069)											(4,069)
Recognition of stock compensation, net (in shares)					193,913
Recognition of stock compensation, net		1,998			$ 970			1,028
Terminated Retirement Plan (formerly ESOP) put option		34,991												34,991
Stock issuance - common (in shares)					3,045,426
Stock issuance		95,317			$ 15,227			80,090
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		(2,937)							(2,937)
Common shares outstanding, ending balance (in shares) at Dec. 31, 2018					23,726,559
Stockholders' equity, ending balance at Dec. 31, 2018		$ 549,779			$ 118,633	$ 0	$ 0	$ 242,041	$ 191,585			$ 0	$ (2,480)	$ 0
[1]	Presentation for 2016 beginning share and per share amounts has been adjusted to reflect a 2-for-1 stock split that occurred on October 5, 2016.

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical)	12 Months Ended
	Dec. 31, 2018$ / shares	Dec. 31, 2017$ / shares	Dec. 31, 2016$ / shares
Statement of Stockholders' Equity [Abstract]
Common stock split ratio			2
Common stock split dividend rate			100.00%
Common stock dividends declared ($ per share)	$ 0.13	$ 0.13	$ 0.13

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net income	$ 51,605	$ 14,669	$ 12,850
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	1,014	8,336	30,078
Depreciation and amortization	5,869	5,852	7,848
Net amortization on securities	1,138	1,416	1,347
Amortization of investments in tax credit funds	1,899	2,629	2,251
Net realized loss (gain) on securities sold	8	0	(136)
Deferred income tax expense	5,637	4,931	1,400
Stock-based compensation expense	1,462	1,150	1,547
Originations of mortgage loans held for sale	(300,093)	(500,234)	(745,320)
Proceeds from mortgage loans held for sale	309,153	517,326	754,667
Gain on mortgage loans held for sale, including origination of servicing rights	(6,403)	(11,615)	(12,546)
Net loss (gain) on disposals of premises and equipment	75	(1,434)	198
Loss on non-mortgage loans held for sale	0	12,708	0
Increase in the cash surrender value of life insurance	(713)	(631)	(708)
Gain on equity securities without a readily determinable fair value	(1,977)	0	0
Net losses on sales and write downs of other real estate owned	95	398	328
Other operating activities, net	9,057	6,487	774
Net cash provided by operating activities	77,826	61,988	54,578
Cash flows from investing activities:
Cash paid for business combinations, net of cash acquired	(6,596)	0	0
Purchases of securities available for sale	(477,548)	(443,033)	(465,690)
Maturities, paydowns and calls of securities available for sale	279,152	409,180	433,361
Proceeds from sales of securities available for sale	20,877	0	7,136
Maturities, paydowns and calls of securities held to maturity	1,018	520	513
Paydowns of securities carried at fair value	414	381	673
Net purchases of non-marketable equity securities held in other financial institutions	(17,026)	(3,199)	(318)
Paydowns and proceeds from non-mortgage loans held for sale	0	13,260	0
Originations of mortgage warehouse loans	(4,495,650)	(4,343,469)	(3,677,464)
Proceeds from pay-offs of mortgage warehouse loans	4,542,822	4,344,800	3,722,658
Net increase in loans, excluding mortgage warehouse and loans held for sale	(601,153)	(179,383)	(169,338)
Purchase of bank-owned life insurance	(4,000)	0	0
Return of capital on limited partnership investments	456	844	3,598
Capital calls on limited partnership investments	(2,838)	(2,175)	(3,805)
Purchases of premises and equipment	(5,482)	(3,031)	(7,925)
Proceeds from sales of premises and equipment	111	4,411	44
Proceeds from sales of other real estate owned	516	3,244	1,852
Net cash used in investing activities	(764,927)	(197,650)	(154,705)
Cash flows from financing activities:
Net increase in deposits	271,124	68,748	55,446
Proceeds from FHLB advances	250,000	0	2,975
Repayments on FHLB advances	(51,342)	(1,294)	(4,141)
Net increase (decrease) in other borrowed funds	101,164	0	(3,600)
Net increase (decrease) in securities sold under agreements to repurchase	4,135	2,733	(4,933)
Dividends paid	(5,941)	(6,996)	(5,764)
Taxes paid related to net share settlement of equity awards	(25)	(348)	(739)
Cash received from exercise of stock options	559	123	737
Proceeds from issuance of common stock, net of offering expenses	95,178	0	41,809
Redemption of Series SBLF preferred stock	(48,260)	0	0
Proceeds from issuance of preferred stock	0	0	1,998
Net cash provided by (used by) financing activities	616,592	62,966	83,788
Net (decrease) increase in cash and cash equivalents	(70,509)	(72,696)	(16,339)
Cash and cash equivalents at beginning of period	187,187	259,883	276,222
Cash and cash equivalents at end of period	116,678	187,187	259,883
Interest paid	34,390	22,686	18,564
Income taxes paid	675	5,268	7,091
Significant non-cash transactions:
Real estate acquired in settlement of loans	1,057	749	3,729
Conversion of Series D preferred stock to common stock	16,998	0	0
Fair value of common stock issued in conjunction with business combination	$ 2,706	$ 0	$ 0

Significant Accounting Policies

Significant Accounting Policies	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Significant Accounting Policies	Note 1 - Significant Accounting Policies Nature of Operations . Origin Bancorp, Inc. ("Company") is a financial holding company headquartered in Ruston, Louisiana. The Company's wholly owned bank subsidiary, Origin Bank ("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, community banking. Basis of Presentation . The consolidated financial statements include the accounts of the Company and all other entities in which Origin Bancorp, Inc. 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 ("RCF"). All significant intercompany balances and transactions have been eliminated in consolidation. The Company's accounting and financial reporting policies conform, in all material respects, to accounting principles generally accepted in the United States ("U.S. GAAP") and to general practices within the financial services industry. The Company has evaluated subsequent events for potential recognition and/or disclosure through the date these consolidated financial statements were issued. Reclassifications . Certain amounts previously reported have been reclassified to conform to the current presentation. Such reclassifications had no effect on prior year net income or stockholders' equity. Variable Interest Entities . The Company determines whether it has a controlling financial interest in an entity by first evaluating whether the entity is a voting interest entity or a variable interest entity ("VIE") under U.S. GAAP. Voting interest entities are entities in which the total equity investment at risk is sufficient to enable the entity to finance itself independently and provides the equity holders with the obligation to absorb losses, the right to receive residual returns and the right to make decisions about the entity's activities. The Company consolidates voting interest entities in which it has all, or at least a majority of, the voting interest. As defined in applicable accounting standards, VIEs are entities that lack one or more of the characteristics of a voting interest entity. A controlling financial interest in a VIE is present when an enterprise has both the power to direct the activities of the VIE that most significantly impact the VIE's economic performance and an obligation to absorb losses or the right to receive benefits that could potentially be significant to the VIE. The enterprise with a controlling financial interest, known as the primary beneficiary, consolidates the VIE. The Company's wholly owned subsidiaries CTB Statutory Trust I and First Louisiana Statutory Trust I are VIEs for which the Company is not the primary beneficiary. Accordingly, the accounts of these trusts are not included in the Company's consolidated financial statements. Operating Segments . Operating segments are components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision-maker in deciding how to allocate resources and in assessing performance. The Bank is the only significant subsidiary upon which management makes decisions regarding how to allocate resources and assess performance. Individual bank branches offer a group of similar services, including commercial, real estate and consumer loans, time deposits, checking and savings accounts, all with similar operating and economic characteristics. While the chief operating decision-maker monitor the revenue streams of the various products and services, operations are managed and financial performance is evaluated on a Company-wide basis. Accordingly, all of the community banking services and branch locations are considered by management to be aggregated into one reportable operating segment, community banking. Use of Estimates . To prepare financial statements in conformity with U.S. GAAP, management makes estimates and assumptions based on available information. These estimates and assumptions affect the amounts reported in the financial statements and the disclosures provided, and actual results could differ. Material estimates that are subject to significant change in the near term are the allowance for loan losses, valuation of other real estate owned, fair value of mortgage servicing rights, realization of deferred tax assets, fair values of financial instruments and the status of contingencies. Actual results could differ from those estimates. Cash and Cash Equivalents . For purposes of the statement of cash flows, the Company considers all cash on hand, demand deposits with other banks, federal funds sold and short term interest-bearing cash items with an original maturity less than 90 days to be cash equivalents. The Company maintains deposits with other financial institutions in amounts that exceed federal deposit insurance coverage. Furthermore, federal funds sold are essentially uncollateralized loans to other financial institutions. Management regularly evaluates the credit risk associated with the counterparties to these transactions and believes that the Company is not exposed to any significant credit risks on cash and cash equivalents. At December 31, 2018 and 2017 the Company had cash collateral required to be held with counterparties on certain derivative transactions as discussed in Note 11 - Derivative Financial Instruments . At December 31, 2018 , and 2017 the Company had no reserve requirement for cash balances with the Federal Reserve. Securities . The Company accounts for debt and equity securities as follows: Available for Sale ("AFS") - Debt and equity securities that will be held for indefinite periods of time, including securities that may be sold in response to changes in market interest or prepayment rates, needs for liquidity and changes in the availability of and the yield of alternative investments are classified as AFS. These assets are carried at fair value. Fair value is determined using published quotes. If quoted market prices are not available, fair values are based on other methods including, but not limited to the discounting of cash flows. Held to Maturity ("HTM") - Debt securities that management has the positive intent and ability to hold until maturity are classified as HTM and are carried at their remaining unpaid principal balance, net of unamortized premiums or unaccreted discounts. Securities Carried at Fair Value through Income - Debt securities for which the Company has elected the fair value option for accounting are classified as securities carried at fair value through income. Management has elected the fair value option for these items to offset the corresponding change in fair value of related interest rate swap agreements. Fair value is determined using discounted cash flows and credit quality indicators. Changes in fair value are reported through the consolidated statements of income as a part of other noninterest income. Unrealized gains and losses on AFS securities are excluded from earnings and reported net of tax in accumulated other comprehensive income until realized. Declines in the fair value of AFS and HTM securities below their cost are reflected in earnings as realized losses to the extent the impairment is deemed to be other-than-temporary credit losses. In estimating other-than-temporary impairment losses, management considers (1) the length of time and the extent to which the fair value has been less than cost, (2) the financial condition and near-term prospects of the issuer, and (3) management's intent and ability to retain the investment in the issuer for a period of time sufficient to allow for any anticipated recovery in fair value. The amount of the impairment related to other factors is recognized in other comprehensive income unless there is no ability or intent to hold to recovery. Purchase premiums and discounts are recognized in interest income using the interest method over the terms of the securities to the earlier of the call date or maturity date. Gains and losses on the sale of securities are recorded on the trade date and are determined using the specific identification method. Non-marketable Equity Securities Held in Other Financial Institutions . Securities with limited marketability, such as stock in the Federal Reserve Bank of Dallas ("FRB") or the Federal Home Loan Bank of Dallas ("FHLB"), are carried at cost, less impairment, if any. These investments in stock do not have readily determinable fair values. The Company's remaining equity investments in other financial institutions, totaling $11.7 million and $7.5 million at December 31, 2018 and 2017, respectively, qualify for the practicability exception under Accounting Standards Update ("ASU") 2016-01 due to having illiquid markets and are carried at cost, less impairment, plus or minus any observable price changes. The carrying value of these securities was evaluated and was determined not to be impaired for the years ended December 31, 2018 , 2017 and 2016. Loans Held for Sale . Loans held for sale include mortgage loans and are carried at fair value, with unrealized gains and losses recorded in the consolidated statements of income. Forward commitments to sell mortgage loans are acquired to reduce market risk on mortgage loans in the process of origination and mortgage loans held for sale. The forward commitments acquired by the Company for mortgage loans in process of origination are mandatory forward commitments, and the Company is required to substitute another loan or to buy back the commitment if the original loan does not fund. Typically, the Company delivers the mortgage loans within a few days after the loans are funded. These commitments are derivative instruments carried at fair value. Gains and losses resulting from sales of mortgage loans are realized when the respective loans are sold to investors. Gains and losses are determined by the difference between the selling price (including the fair value of any items such as mortgage servicing rights) and the carrying amount of the loans sold. Fees received from borrowers to guarantee the funding of mortgage loans held for sale are recognized as income or expense when the loans are sold or when it becomes evident that the commitment will not be used. Loans . Loans that management has the intent and ability to hold for the foreseeable future, or until maturity or payoff, are reported at their outstanding unpaid principal balances adjusted for charge-offs, the allowance for loan losses, and any deferred fees or costs on originated loans. Interest income is accrued on the unpaid principal balance. Loan origination fees, and certain direct origination costs, are deferred and amortized as a yield adjustment over the lives of the related loans using the interest method. Late fees are recognized as income when earned, assuming collectability is reasonably assured. The Company has elected the fair value option on a small portion of its loans held for investment, with changes in fair value recorded in noninterest income. For these loans, the earned current contractual interest payment is recognized in interest income. Loan origination costs and fees are recognized in earnings as incurred and not deferred. Because these loans are recognized at fair value, the Company's allowance for loan losses policy does not apply to these loans. Fair value is determined using discounted cash flows and credit quality indicators. In addition to loans issued in the normal course of business, the Company considers overdrafts on customer deposit accounts to be loans and classifies these overdrafts as loans in its consolidated balance sheets. Loans are placed on nonaccrual status when management believes that the borrower's financial condition, after giving consideration to economic and business conditions and collection efforts, is such that collection of interest is doubtful, or generally when loans are 90 days or more past due. When accrual of interest is discontinued, all unpaid accrued interest is reversed. Past due status is based on contractual terms of the loan. Interest income on nonaccrual loans may be recognized to the extent cash payments are received, but payments received are usually applied to principal. Nonaccrual loans are generally returned to accrual status when principal and interest payments are less than 90 days past due, the customer has made required payments for at least six months, and the Company reasonably expects to collect all principal and interest. Allowance for Loan Losses . The allowance for loan losses is established as losses are estimated to have occurred through a provision for loan losses charged to earnings. The allowance for loan losses is evaluated on a regular basis by management and is based upon management's periodic review of the collectability of the loans in light of historical experience, the nature and volume of the loan portfolio, adverse situations that may affect the borrower's ability to repay, estimated value of any underlying collateral, and prevailing economic conditions. This evaluation is inherently subjective as it requires estimates that are susceptible to significant revision as more information becomes available. Loans are charged off against the allowance for loan losses when management believes the loss is confirmed. Subsequent recoveries, if any, are credited to the allowance. The allowance consists of allocated and general components. The allocated component relates to loans that are classified as impaired, and an allowance is established when the discounted cash flows (or collateral value or observable market price) of the impaired loan is lower than the carrying value of that loan. The general component relates to loans that are not classified as impaired and is based on historical charge-off experience and the expected loss, given default, derived from the Company's internal risk rating process. Other adjustments may be made to the allowance for pools of loans after an assessment of internal or external influences on credit quality that are not fully reflected in the historical loss or risk rating data. Delinquency statistics are updated at least monthly and are the most meaningful indicator of the credit quality of one-to-four single family residential, home equity loans and lines of credit and other consumer loans. Internal risk ratings are considered the most meaningful indicator of credit quality for commercial and industrial, construction, and commercial real estate loans. Internal risk ratings are a key factor in identifying loans that are individually evaluated for impairment and impact management's estimates of loss factors used in determining the amount of the allowance for loan losses. Internal risk ratings are updated on a regular basis. A loan is considered impaired when, based on current information and events, it is probable that the Company will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Impaired loans include nonperforming loans and loans modified in troubled debt restructurings ("TDRs"). TDRs are loans for which the contractual terms on the loan have been modified and both of the following conditions exist: (1) the borrower is experiencing financial difficulty and (2) the restructuring constitutes a concession. Concessions could include a reduction in the interest rate on the loan, payment extensions, forgiveness of principal, forbearance or other actions intended to maximize collection. The Company assesses all loan modifications to determine whether they constitute a TDR. All TDRs are considered impaired loans. Impairment is measured on a loan-by-loan basis by either the present value of expected future cash flows discounted at the loan's effective interest rate, the loan's obtainable market price or the fair value of the collateral if the loan is collateral dependent. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower's prior payment record, and the amount of the shortfall in relation to the principal and interest owed. Premises and Equipment, net . Land is carried at cost. Buildings and improvements are stated at cost less accumulated depreciation computed using the straight-line method over the estimated useful lives of the assets, which range from 35 to 39 years. Furniture, fixtures, and equipment are stated at cost less accumulated depreciation computed using the straight-line method over the estimated useful lives of the assets, which range from three to seven years. Leasehold improvements are capitalized and depreciated using the straight-line method over the estimated useful lives of the leasehold improvements or the expected terms of the leases, if shorter. Mortgage Servicing Rights and Transfers of Financial Assets . Gains or losses on "servicing-retained" loan sale transactions generally include a component reflecting the differential between the contractual interest rate of the loan and the interest rate to be received by the investor. The present value of the estimated future profit for servicing the loans is also taken into account in determining the amount of gain or loss on the sale of these loans. For loans sold servicing-retained, the fair value of mortgage servicing rights is recorded as an asset, with their value estimated using a discounted cash flow methodology to arrive at the present value of future expected earnings from the servicing of the loans. Significant model inputs include prepayment speeds, discount rates, and servicing costs. Servicing revenues are based on a contractual percentage of the outstanding principal or a fixed amount per loan and are recorded as income when earned. Loans sold into the secondary market are considered transfers of financial assets. These transfers are accounted for as sales when control over the asset has been surrendered, which is deemed to have occurred when: an asset does not have any claims to it by the transferor or their creditors, including in bankruptcy or other receivership situations; the transferee obtains the unconditional right to pledge or exchange the asset; or the transfer does not include a repurchase provision above the limited recourse provisions of these loan sales. Derivative Instruments and Hedging Activities . All derivatives are recorded on the accompanying consolidated balance sheets at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether the Company has elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. Derivatives designated and qualifying as a hedge of the exposure to changes in the fair value of an asset, liability, or firm commitment attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivatives designated and qualifying as a hedge of the exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges. Hedge accounting generally provides for the matching of the timing of gain or loss recognition on the hedging instrument with the recognition of the changes in the fair value of the hedged asset or liability that are attributable to the hedged risk in a fair value hedge or the earnings effect of the hedged forecasted transactions in a cash flow hedge. During the term of a cash flow hedge contract the effective portion of changes in fair value in the derivative instrument are recorded in accumulated other comprehensive income. Changes in the fair value of derivatives to which hedge accounting does not apply are recognized immediately in earnings. Note 11 - Derivative Financial Instruments describes the derivative instruments currently used by the Company and discloses how these derivatives impact its consolidated balance sheets and statements of income. Goodwill and Other Intangible Assets . Goodwill, which represents the excess of cost over the fair value of the net assets of an acquired business, is not amortized but tested for impairment on an annual basis, which is October 1 for the Company, or more often if events or circumstances indicate that there may be impairment. Other intangible assets, such as relationship based intangibles and core deposit intangibles, are amortized on a basis consistent with the receipt of economic benefit to us. Such assets are evaluated at least annually as to the recoverability of their carrying value for potential impairment. In the quarter following the period in which identified intangible assets become fully amortized, the fully amortized balances are removed from the gross asset and accumulated amortization amounts. Other Real Estate Owned . Other real estate owned ("OREO") represents properties acquired through foreclosure or acceptance of a deed in lieu of foreclosure on loans on which the borrowers have defaulted as to payment of principal and interest. OREO also includes bank-owned real estate which the Company is no longer utilizing and intends to sell. These properties are initially recorded at fair value, less cost to sell, at the date of foreclosure establishing a new cost basis. Fair value is determined based on third party appraisals. Any subsequent capital improvements that increase value are added to the balance of the properties. Any valuation adjustments required at the date of transfer from loans to OREO are charged to the allowance for loan losses. Any subsequent write-downs to reflect current fair value, or gains and losses on the sale of the properties are charged to noninterest income. At December 31, 2018 and 2017 the balance of OREO was $3.7 million and $499,000 , respectively, and included as a component of other assets in the accompanying consolidated balance sheets. Overnight Repurchase Agreements with Depositors . The Company enters into agreements under which it sells securities subject to an obligation to repurchase the same or similar securities. Under these arrangements, the Company may transfer legal control over the assets but still retain effective control through an agreement that both entitles and obligates it to repurchase the assets. Securities sold under agreements to repurchase generally mature on the banking day following that on which the investment was initially sold and are treated as collateralized financing transactions which are recorded at the amounts at which the securities were sold plus accrued interest. Interest rates and maturity dates of the securities involved vary and are not intended to be matched with funds from customers. Mortgage Banking Revenue . This revenue category primarily reflects the Company's mortgage production, sales and mortgage servicing revenue, including fees and income derived from mortgages originated with the intent to sell; mortgage sales and servicing; and the impact of risk management activities associated with the mortgage pipeline and mortgage servicing rights ("MSRs"). This revenue category also includes gains and losses on sales and changes in fair value for mortgage loans originated with the intent to sell and measured at fair value under the fair value option. Changes in the fair value of MSRs are reported in mortgage banking revenue. Net interest income from mortgage loans is recorded in interest income. Income Taxes . Income tax expense is the total of the current year income tax due or refundable and the change in deferred tax assets and liabilities. Deferred tax assets and liabilities are the expected future tax amounts for the temporary differences between carrying amounts and tax bases of assets and liabilities, computed using enacted tax rates. A valuation allowance, if needed, reduces deferred tax assets to the amount expected to be realized. A tax position is recognized as a benefit only if it is "more likely than not" that the tax position would be sustained in a tax examination, with a tax examination being presumed to occur. The amount recognized is the largest amount of tax benefit that is greater than 50% likely of being realized on examination. For tax positions not meeting the "more likely than not" test, no tax benefit is recorded. The Company did not have any amount accrued with respect to uncertainty in income taxes at December 31, 2018 or 2017. The Company recognizes interest and/or penalties related to income tax matters as a component of noninterest expense. There were no penalties or related interest for the years ended December 31, 2018, 2017 or 2016. Federal income tax expense or benefit has been allocated to subsidiaries on a separate return basis. Stock-Based Compensation . The cost of employee services received in exchange for stock options or restricted stock grants are measured using the fair value of the award on the grant date and is recognized over the service period. During 2016, the Company adopted the amendments outlined in ASU No. 2016-09 — Compensation — Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting . The adoption of the ASU did not have a significant impact on its consolidated financial statements or disclosures. Other Investments . The Company accounts for investments in limited partnerships, limited liability companies ("LLCs"), and other privately held companies using either the equity method of accounting or at amortized cost net of impairments and observable price changes. The accounting treatment depends upon the Company's percentage ownership or degree of management influence. Under the equity method of accounting, the Company records its initial investment at cost. Subsequently, the carrying amount of the investment is increased or decreased to reflect its share of income or loss of the investee. The Company's recognition of earnings or losses from an equity method investment is based on its ownership percentage in the investee and the investee's earnings for the reporting period, and is recorded on a one-quarter lag. All of the Company's investments in limited partnerships, LLCs, and other companies are privately held, and their fair values are not readily available. Management evaluates the investments in investees for impairment based on the investee's ability to generate cash through its operations or obtain alternative financing, and other subjective factors. There are inherent risks associated with investments in such companies, which may result in volatility in the consolidated statements of income in future periods. At December 31, 2018, and 2017, investments in limited partnerships, LLCs and other privately held companies totaled $14.5 million and $11.3 million , respectively, and were included in other assets in the accompanying consolidated balance sheets. Investments in Tax Credit Entities . As part of its Community Reinvestment Act responsibilities and due to their favorable economic characteristics, the Company invests in tax credit-motivated projects primarily in the markets it serves. These projects are directed at tax credits issued under Low-Income Housing Tax Credits. The Company generates returns on tax credit motivated projects through the receipt of federal, and if applicable, state tax credits. The federal tax credits are recorded as an offset to the income tax provision in the year that they are earned under federal income tax law – over 10 to 15 years beginning in the year in which rental activity commences. These credits, if not used in the tax return for the year of origination, can be carried forward for 20 years. The Company invests in a tax credit entity, usually an LLC, which owns the real estate. The Company receives a nonvoting interest in the entity that must be retained during the compliance period for the credits ( 15 years for Low-Income Housing Tax Credit programs). Control of the tax credit entity rests in the 0.1% interest general partner, who has the power and authority to make decisions that impact economic performance of the project and is required to oversee and manage the project. Due to the lack of any voting, economic, or managerial control, and due to the contractual reduction in the investment, the Company accounts for its investment by amortizing the investment, beginning at the issuance of the certificate of occupancy of the project, over the compliance period, as management believes any potential residual value in the real estate will have limited value. Amortization is included as a component of income tax expense. The Company has the risk of credit recapture if the project does not maintain compliance during the compliance period. No such events have occurred to date. At December 31, 2018, and 2017, the Company had investments in tax credit entities of $10.6 million and $12.5 million , respectively, which are included in other assets in the accompanying consolidated balance sheets. Earnings Per Share . Basic earnings per common share is calculated using the two-class method. The two-class method is an earnings allocation formula that determines earnings per share for each share of common stock and participating securities according to dividends declared (distributed earnings) and participation rights in undistributed earnings. Distributed and undistributed earnings are allocated between common and participating security stockholders based on their respective rights to receive dividends. Share-based payment awards that contain nonforfeitable rights to dividends or dividend equivalents are considered participating securities (e.g., restricted stock grants). Preferred stock that receives dividends based on dividends paid on common stock is also considered a participating security (e.g., Series D preferred stock). Undistributed net losses are not allocated to holders of participating securities, as they do not have a contractual obligation to fund the losses incurred by the Company. Net income attributable to common stockholders is then divided by the weighted average number of common shares outstanding during the period, net of participating securities and reduced for average unallocated shares held by the Company's Employee Retirement Plan ("Retirement Plan"). Diluted income per common share considers common stock issuable under the assumed release of unvested restricted stock awards, convertible preferred stock being converted to common stock, and the assumed exercise of stock options granted. The dilutive effect of share-based payment awards that are not deemed to be participating securities is calculated using the treasury stock method, which assumes that the proceeds from exercise are used to purchase common stock at the average market price for the period. The dilutive effect of participating securities is calculated using the more dilutive of the treasury stock method (which assumes that the participating securities are exercised/released) or the two-class method (which assumes that the participating securities are not exercised/released and earnings are reallocated between common and participating security stockholders). Potentially dilutive common stock equivalents are excluded from the computation of diluted earnings per common share in periods in which the effect would be antidilutive. 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 i

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Earnings Per Share	Note 2 - Earnings Per Share (Dollars in thousands, except per share amounts) Years Ended December 31, Basic earnings per common share 2018 2017 2016 Net income $ 51,605 $ 14,669 $ 12,850 Less: Dividends to preferred stock (1) 1,923 4,461 4,398 Net income allocated to participating stockholders (1) (2) 1,029 377 316 Net income available to common stockholders (3) $ 48,653 $ 9,831 $ 8,136 Weighted average common shares outstanding (4) 21,995,990 19,418,278 17,545,655 Basic earnings per common share $ 2.21 $ 0.51 $ 0.46 Diluted earnings per common share Diluted earnings applicable to common stockholders (3) $ 48,819 $ 9,861 $ 8,136 Weighted average diluted common shares outstanding: Weighted average common shares outstanding (4) 21,995,990 19,418,278 17,545,655 Dilutive effect of common stock options 198,439 216,134 187,406 Weighted average diluted common shares outstanding 22,194,429 19,634,412 17,733,061 Diluted earnings per common share $ 2.20 $ 0.50 $ 0.46 ____________________________ (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 period prior to June 30, 2018, Series D preferred stockholders were participating stockholders as those shares participate 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 calculation of earnings per share for the year ended December 31, 2018, includes an allocation for Series D preferred stockholders, which were converted to common stock during the quarter ended June 30, 2018. (3) Net income available 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) Presentation for 2016 share and per share amounts has been adjusted to reflect a 2 -for-1 stock split that occurred on October 5, 2016.

Securities

Securities	12 Months Ended
	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Securities	Note 3 - 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) December 31, 2018 Amortized Gross Gross Unrealized Losses Fair Available for sale: State and municipal securities $ 99,780 $ 1,266 $ (163 ) $ 100,883 Corporate bonds 10,997 102 (65 ) 11,034 U.S. government and agency securities 61,122 82 (54 ) 61,150 Commercial mortgage-backed securities 16,672 94 — 16,766 Residential mortgage-backed securities 188,058 417 (2,160 ) 186,315 Residential collateralized mortgage obligations 202,422 315 (3,241 ) 199,496 Total $ 579,051 $ 2,276 $ (5,683 ) $ 575,644 Held to maturity: State and municipal securities $ 19,169 $ — $ (33 ) $ 19,136 Securities carried at fair value through income: State and municipal securities (1) $ 11,503 $ — $ — $ 11,361 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 5 - Fair Value of Financial Instruments for more information. Securities with unrealized losses at December 31, 2018 , and December 31, 2017 , aggregated by investment category and those individual securities that have been in a continuous unrealized loss position for less than 12 months and for 12 months or more were as follows: (Dollars in thousands) Less than 12 Months 12 Months or More Total December 31, 2018 Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss Available for sale: State and municipal securities $ 13,101 $ (50 ) $ 8,463 $ (113 ) $ 21,564 $ (163 ) Corporate bonds 7,932 (65 ) — — 7,932 (65 ) U.S. government and agency securities 56,271 (54 ) — — 56,271 (54 ) Commercial mortgage-backed securities — — — — — — Residential mortgage-backed securities 18,836 (65 ) 77,471 (2,095 ) 96,307 (2,160 ) Residential collateralized mortgage obligations 14,711 (79 ) 120,601 (3,162 ) 135,312 (3,241 ) Total $ 110,851 $ (313 ) $ 206,535 $ (5,370 ) $ 317,386 $ (5,683 ) Held to maturity: State and municipal securities $ 13,921 $ (33 ) $ — $ — $ 13,921 $ (33 ) 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 December 31, 2018 , the Company had 118 individual securities with unrealized losses. 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. Proceeds from sales of securities available for sale and gross gains for the years ended December 31, 2018, 2017 and 2016 are shown below. December 31, (Dollars in thousands) 2018 2017 2016 Proceeds from sales $ 20,877 $ — $ 7,136 Gross realized gains 381 — 136 Gross realized losses (389 ) — — Tax (benefit) expense related to securities gains/losses (2 ) — 48 The following table presents the amortized cost and fair value of securities available for sale and held to maturity at December 31, 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 December 31, 2018 Amortized Cost Fair Value Amortized Cost Fair Value Due in one year or less $ — $ — $ 58,681 $ 58,654 Due after one year through five years 13,954 13,921 25,175 25,422 Due after five years through ten years — — 81,253 82,144 Due after ten years 5,215 5,215 6,790 6,847 Commercial mortgage-backed securities — — 16,672 16,766 Residential mortgage-backed securities — — 188,058 186,315 Residential collateralized mortgage obligations — — 202,422 199,496 Total $ 19,169 $ 19,136 $ 579,051 $ 575,644 The following table presents carrying amounts of securities pledged as collateral for deposits and repurchase agreements for the period ends presented. December 31, (Dollars in thousands) 2018 2017 Carrying value of securities pledged to secure public deposits $ 364,055 $ 276,319 Carrying value of securities pledged to repurchase agreements 48,847 36,685

Loans

Loans	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
Loans	Note 4 - Loans Loans consist of the following: December 31, (Dollars in thousands) 2018 2017 Loans held for sale $ 52,210 $ 65,343 Loans held for investment: Loans secured by real estate: Commercial real estate $ 1,228,402 $ 1,083,275 Construction/land/land development 429,660 322,404 Residential real estate 629,714 570,583 Total real estate 2,287,776 1,976,262 Commercial and industrial 1,272,566 989,220 Mortgage warehouse lines of credit 207,871 255,044 Consumer 20,892 20,505 Total loans held for investment (1) 3,789,105 3,241,031 Less: Allowance for loan losses 34,203 37,083 Net loans held for investment $ 3,754,902 $ 3,203,948 ____________________________ (1) Includes net deferred loan fees of $3.2 million and $1.0 million at December 31, 2018 , and December 31, 2017 , respectively. Included in total loans held for investment were $18.6 million of commercial real estate loans for which the fair value option was elected as of December 31, 2018 . 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 5 - 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 under 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 under 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 under 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 December 31, 2018 , and December 31, 2017 , excluding loans held for sale, were as follows: (Dollars in thousands) December 31, 2018 Loans secured by real estate: Pass Special Mention Substandard Doubtful Loss Total Commercial real estate $ 1,206,194 $ 3,101 $ 19,107 $ — $ — $ 1,228,402 Construction/land/land development 426,770 157 2,733 — — 429,660 Residential real estate 617,996 1,142 10,576 — — 629,714 Total real estate 2,250,960 4,400 32,416 — — 2,287,776 Commercial and industrial 1,190,718 34,964 46,884 — — 1,272,566 Mortgage warehouse lines of credit 207,871 — — — — 207,871 Consumer 20,712 — 180 — — 20,892 Total loans held for investment $ 3,670,261 $ 39,364 $ 79,480 $ — $ — $ 3,789,105 (Dollars in thousands) December 31, 2017 Loans secured by real estate: Pass Special Mention Substandard Doubtful Loss Total 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: (Dollars in thousands) December 31, 2018 Loans secured by real estate: 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 Commercial real estate $ 458 $ 1,409 $ 7,224 $ 9,091 $ 1,219,311 $ 1,228,402 $ — Construction/land/land development 2,657 — 435 3,092 426,568 429,660 — Residential real estate 2,137 527 4,149 6,813 622,901 629,714 — Total real estate 5,252 1,936 11,808 18,996 2,268,780 2,287,776 — Commercial and industrial 276 8,263 6,157 14,696 1,257,870 1,272,566 — Mortgage warehouse lines of credit — — — — 207,871 207,871 — Consumer 383 8 2 393 20,499 20,892 — Total loans held for investment $ 5,911 $ 10,207 $ 17,967 $ 34,085 $ 3,755,020 $ 3,789,105 $ — (Dollars in thousands) December 31, 2017 Loans secured by real estate: 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 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. (Dollars in thousands) Year Ended December 31, 2018 Loans secured by real estate: Beginning Balance Charge-offs Recoveries Provision (Benefit) (1) Ending Balance Commercial real estate $ 8,998 $ 1,300 $ 226 $ 1,075 $ 8,999 Construction/land/land development 2,950 228 6 603 3,331 Residential real estate 5,807 407 133 172 5,705 Commercial and industrial 18,831 5,068 2,206 (353 ) 15,616 Mortgage warehouse lines of credit 214 — — 102 316 Consumer 283 121 92 (18 ) 236 Total $ 37,083 $ 7,124 $ 2,663 $ 1,581 $ 34,203 ____________________________ (1) The $1.0 million provision for credit losses on the consolidated statements of income includes a $1.6 million net loan loss provision and a $567,000 release of provision for off-balance sheet commitments for the year ended December 31, 2018 . (Dollars in thousands) Year Ended December 31, 2017 Loans secured by real estate: Beginning Balance Charge-offs Recoveries Provision (1) Ending Balance Commercial real estate $ 8,718 $ 463 $ 93 $ 650 $ 8,998 Construction/land/land development 2,805 3 5 143 2,950 Residential real estate 5,003 1,446 125 2,125 5,807 Commercial and industrial 33,590 21,767 1,918 5,090 18,831 Mortgage warehouse lines of credit 139 — — 75 214 Consumer 276 198 69 136 283 Total $ 50,531 $ 23,877 $ 2,210 $ 8,219 $ 37,083 ____________________________ (1) The $8.3 million provision for credit losses on the consolidated statements of income includes a $8.2 million net loan loss provision and an $117,000 provision for off-balance sheet commitments for the year ended December 31, 2017 . (Dollars in thousands) Year Ended December 31, 2016 Loans secured by real estate: Beginning Balance Charge-offs Recoveries Provision (Benefit) (1) Ending Balance Commercial real estate $ 7,451 $ 422 $ 25 $ 1,664 $ 8,718 Construction/land/land development 3,927 24 7 (1,105 ) 2,805 Residential real estate 5,094 505 185 229 5,003 Commercial and industrial 23,648 24,851 4,199 30,594 33,590 Mortgage warehouse lines of credit 761 — — (622 ) 139 Consumer 349 604 126 405 276 Total $ 41,230 $ 26,406 $ 4,542 $ 31,165 $ 50,531 ____________________________ (1) The $30.1 million provision for credit losses on the consolidated statements of income includes a $31.2 million loan loss provision offset by a $1.1 million release of provision for off-balance sheet commitments for the year ended December 31, 2016. The following tables present the balance of loans receivable by method of impairment evaluation at the dates indicated: (Dollars in thousands) December 31, 2018 Loans secured by real estate: 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) Commercial real estate $ 5 $ 8,994 $ 8,773 $ 1,201,058 Construction/land/land development 19 3,312 1,017 428,643 Residential real estate 68 5,637 6,876 622,838 Commercial and industrial 255 15,361 16,428 1,256,138 Mortgage warehouse lines of credit — 316 — 207,871 Consumer 19 217 184 20,708 Total $ 366 $ 33,837 $ 33,278 $ 3,737,256 ____________________________ (1) Excludes $18.6 million of commercial real estate loans at fair value, which are not evaluated for impairment due to the fair value option election. See Note 5 - Fair Value of Financial Instruments for more information. (Dollars in thousands) December 31, 2017 Loans secured by real estate: 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) 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 5 - 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 December 31, 2018 , or December 31, 2017 . (Dollars in thousands) December 31, 2018 Loans secured by real estate: Unpaid Contractual Principal Balance Recorded Investment with no Allowance Recorded Investment with an Allowance Total Recorded Investment Allocation of Allowance for Loan Losses Commercial real estate $ 10,894 $ 8,725 $ 48 $ 8,773 $ 5 Construction/land/land development 1,329 838 179 1,017 19 Residential real estate 7,815 6,092 784 6,876 68 Total real estate 20,038 15,655 1,011 16,666 92 Commercial and industrial 18,883 15,806 622 16,428 255 Consumer 202 — 184 184 19 Total impaired loans $ 39,123 $ 31,461 $ 1,817 $ 33,278 $ 366 (Dollars in thousands) December 31, 2017 Loans secured by real estate: Unpaid Contractual Principal Balance Recorded Investment with no Allowance Recorded Investment with an Allowance Total Recorded Investment Allocation of Allowance for Loan Losses 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 income recognized on impaired loans while classified as impaired for the years ended December 31, 2018 , 2017 and 2016, were as follows: Years Ended December 31, (Dollars in thousands) 2018 2017 2016 Loans secured by real estate: Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized Commercial real estate $ 9,901 $ 67 $ 7,046 $ 165 $ 7,179 $ 273 Construction/land/land development 1,401 16 1,053 10 1,179 55 Residential real estate 7,529 60 9,398 75 11,065 385 Total real estate 18,831 143 17,497 250 19,423 713 Commercial and industrial 14,814 199 40,316 375 94,940 3,139 Consumer 251 5 244 7 308 18 Total impaired loans $ 33,896 $ 347 $ 58,057 $ 632 $ 114,671 $ 3,870 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 December 31, 2018 , the Company has committed to advance $2,000 in connection with impaired loans. Non-performing (nonaccrual) loans held for investment were as follows: (Dollars in thousands) December 31, Loans secured by real estate: 2018 2017 Commercial real estate $ 8,281 $ 1,745 Construction/land/land development 935 1,097 Residential real estate 6,668 7,166 Total real estate 15,884 10,008 Commercial and industrial 15,792 13,512 Consumer 180 282 Total nonaccrual loans $ 31,856 $ 23,802 For the years ended December 31, 2018 , 2017 and 2016 , gross interest income that would have been recorded had the nonaccruing loans been current in accordance with their original terms was $1.4 million , $1.3 million and $1.6 million , respectively. No interest income was recorded on these loans while they were considered nonaccrual during the years ended December 31, 2018 , 2017 or 2016 . 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 U.S. GAAP. The Company had $741,000 of nonaccrual mortgage loans held for sale that were recorded using the fair value option election at December 31, 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 December 31, 2018 , or December 31, 2017 . The following is a summary of loans classified as TDRs. (Dollars in thousands) December 31, TDRs 2018 2017 Nonaccrual TDRs $ 5,793 $ 2,622 Performing TDRs 2,054 14,234 Total $ 7,847 $ 16,856 The following tables present the pre-modification balance of TDR modifications that occurred during the periods indicated and the ending balances by concession type as of each period presented. (Dollars in thousands) Year Ended December 31, 2018 Loans secured by real estate: Number of Loans Restructured Pre-Modification Recorded Balance Term Concessions Interest Rate Concessions Combination Total Modifications Commercial real estate 1 $ 252 $ 150 $ — $ — $ 150 Residential real estate 6 428 48 19 331 398 Total real estate 7 680 198 19 331 548 Commercial and industrial 3 198 180 — 14 194 Consumer 1 33 — — 29 29 Total 11 $ 911 $ 378 $ 19 $ 374 $ 771 (Dollars in thousands) Year Ended December 31, 2017 Loans secured by real estate: Number of Loans Restructured Pre-Modification Recorded Balance Term Concessions Interest Rate Concessions Combination Total Modifications Commercial real estate 4 $ 2,071 $ 2,057 $ — $ — $ 2,057 Residential real estate 3 133 38 — 210 248 Total real estate 7 2,204 2,095 — 210 2,305 Commercial and industrial 8 10,799 9,882 — 40 9,922 Consumer 1 49 45 — — 45 Total 16 $ 13,052 $ 12,022 $ — $ 250 $ 12,272 (Dollars in thousands) Year Ended December 31, 2016 Loans secured by real estate: Number of Loans Restructured Pre-Modification Recorded Balance Term Concessions Interest Rate Concessions Combination Total Modifications Commercial real estate 2 $ 398 $ 94 $ — $ 206 $ 300 Residential real estate 6 129 — — 96 96 Total real estate 8 527 94 — 302 396 Commercial and industrial 10 19,536 9,331 11 7 9,349 Consumer 1 22 21 — — 21 Total 19 $ 20,085 $ 9,446 $ 11 $ 309 $ 9,766 During the year ended December 31, 2018 , no loans defaulted after having been modified as a TDR within the previous 12 months. During the year ended December 31, 2017 , one loan with an outstanding principal balance of $241,000 defaulted after having been modified as a TDR within the previous 12 months. During the year ended December 31, 2016 , four loans with a combined outstanding principal balance of $5.5 million defaulted after having been modified as TDRs 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 year ended December 31, 2018, did not significantly impact the Company's determination of the allowance for loan losses. The Company monitors the performance of the modified loans to their restructured terms on an ongoing basis. In the event of a subsequent default, the allowance for loan losses continues to be reassessed on the basis of an individual evaluation of each loan.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Note 5 - 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 consolidated 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 that 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 December 31, 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 2018 or 2017. December 31, 2018 (Dollars in thousands) Level 1 Level 2 Level 3 Total State and municipal securities $ — $ 61,522 $ 39,361 $ 100,883 Corporate bonds — 11,034 — 11,034 U.S. treasury securities 55,515 — — 55,515 U.S. government agency securities — 5,635 — 5,635 Commercial mortgage-backed securities — 16,766 — 16,766 Residential mortgage-backed securities — 186,315 — 186,315 Residential collateralized mortgage obligations — 199,496 — 199,496 Securities available for sale 55,515 480,768 39,361 575,644 Securities carried at fair value through income — — 11,361 11,361 Loans held for sale — 21,562 — 21,562 Loans at fair value — — 18,571 18,571 Mortgage servicing rights — — 25,114 25,114 Other assets - derivatives — 3,563 — 3,563 Total recurring fair value measurements - assets $ 55,515 $ 505,893 $ 94,407 $ 655,815 Other liabilities - derivatives $ — $ (2,846 ) $ — $ (2,846 ) Total recurring fair value measurements - liabilities $ — $ (2,846 ) $ — $ (2,846 ) 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 years ended December 31, 2018 , and 2017 , are summarized as follows: (Dollars in thousands) Loans at Fair Value MSRs Securities Available for Sale Securities at Fair Value Through Income Balance at January 1, 2018 $ 26,611 $ 24,182 $ 42,015 $ 12,033 Gain (loss) recognized in earnings: Mortgage banking revenue (1) — (963 ) — — Other noninterest income (389 ) — — (258 ) Gain (loss) recognized in AOCI — — (597 ) — Purchases, issuances, sales and settlements: Originations — 1,895 — — Purchases — — 259 — Settlements (7,651 ) — (2,316 ) (414 ) Balance at December 31, 2018 $ 18,571 $ 25,114 $ 39,361 $ 11,361 Balance at January 1, 2017 $ 33,693 $ 29,385 $ 43,858 $ 12,511 Losses recognized in earnings: Mortgage banking revenue (1) — (6,014 ) — — Other noninterest income (712 ) — — (97 ) Gain recognized in AOCI — — 425 — Purchases, issuances, sales, and settlements: Purchases — 3,061 275 — Sales (2,516 ) (2,250 ) — — Settlements (3,854 ) — (2,543 ) (381 ) Balance at December 31, 2017 $ 26,611 $ 24,182 $ 42,015 $ 12,033 ____________________________ (1) Mortgage banking revenue includes changes in fair value due to market changes and 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 1, 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 Accounting Standards Codification ("ASC") 820, Fair Value Measurements and Disclosures , the Company periodically checks the fair value by comparing them to another pricing source, such as Bloomberg LP. The third-party pricing service is subject to an annual review of internal controls in accordance with the Statement on Standards for Attestation Engagements No. 16, which was 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 using a discounted cash flow valuation technique. The significant assumptions used to value MSRs were as follows: December 31, 2018 2017 Prepayment speed 9.90 % 10.80 % Discount rate 10.42 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 December 31, 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: December 31, 2018 (Dollars in thousands) Aggregate Fair Value Aggregate Unpaid Principal Balance Difference Loans held for sale (1) $ 21,562 $ 21,173 $ 389 Commercial real estate loans held for investment (2) 18,571 18,391 180 Securities carried at fair value through income 11,361 11,503 (142 ) Total $ 51,494 $ 51,067 $ 427 ____________________________ (1) A total of $ 741,000 of loans held for sale were designated as nonaccrual or 90 days or more past due at December 31, 2018 . Of this balance, the Company had guarantees receivable from U.S. Government agencies totaling $ 582,000 . (2) There were no commercial real estate loans for which the fair value had been elected that were designated as nonaccrual or 90 days or more past due at December 31, 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) A total of $2.4 million of loans were 90 days or more past due 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 90 days or more past due at December 31, 2017 . Changes in the fair value of assets for which the Company elected the fair value option are classified in the consolidated statement of income line items reflected in the following table: (Dollars in thousands) Years Ended December 31, Changes in fair value included in noninterest income: 2018 2017 2016 Mortgage banking revenue $ (163 ) $ 477 $ (594 ) Other income: Loans at fair value held for investment (389 ) (712 ) (522 ) Securities carried at fair value through income (258 ) (97 ) (140 ) Total impact on other income (647 ) (809 ) (662 ) Total fair value option impact on noninterest income (1) $ (810 ) $ (332 ) $ (1,256 ) ____________________________ (1) The fair value option impact on noninterest income is offset by the derivative gain/loss recognized in noninterest income. Please see Note 8 - 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 December 31, 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 December 31, 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 $42.1 million at December 31, 2018 , and are shown on the face of the consolidated balance sheets. 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 that do not have readily determinable fair values. Government National Mortgage Association Repurchase Asset The Company recorded $30.6 million and $32.6 million , respectively, at December 31, 2018 , and December 31, 2017 , for Government National Mortgage Association ("GNMA") repurchase assets included in mortgage loans held for sale on the consolidated balance sheets. 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 8 - 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 $1.4 million and $18.2 million at December 31, 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 that 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 $3.7 million and $499,000 at December 31, 2018 , and December 31, 2017 , respectively. At December 31, 2018 , the Company had $2.5 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) December 31, Financial assets: 2018 2017 Level 1 inputs: Carrying Estimated Carrying Value Estimated Fair Value Cash and cash equivalents $ 116,678 $ 116,678 $ 187,187 $ 187,187 Level 2 inputs: Securities held to maturity 19,169 19,136 20,188 20,265 Non-marketable equity securities held in other financial institutions 42,149 42,149 22,967 22,967 Accrued interest and loan fees receivable 16,454 16,454 10,719 10,719 Level 3 inputs: Loans held for investment, net (1) 3,736,331 3,605,142 3,177,337 3,238,872 Financial liabilities: Level 2 inputs: Deposits 3,783,138 3,537,283 3,512,014 3,352,213 FHLB advances and other borrowings 445,224 444,286 144,357 145,330 Junior subordinated debentures 9,644 10,723 9,619 14,132 Accrued interest payable 2,679 2,679 2,424 2,424 ____________________________ (1) Loans held for investment, net does not include loans for which the fair value option had been elected at December 31, 2018 , or December 31, 2017 , as these loans are carried at fair value on a recurring basis.

Premises, Equipment and Lease C

Premises, Equipment and Lease Commitments	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Premises, Equipment and Lease Commitments	Note 6 - Premises, Equipment and Lease Commitments Major classifications of premises and equipment are summarized below: December 31, (Dollars in thousands) 2018 2017 Land, buildings and improvements $ 82,114 $ 84,468 Furniture, fixtures and equipment 24,946 25,349 Leasehold improvements 11,345 9,673 Construction in process 1,715 296 120,120 119,786 Accumulated depreciation (45,106 ) (42,378 ) Total $ 75,014 $ 77,408 During 2018, one building owned by the Company was sold for a gain of $81,000 . In September 2018, the Company closed a banking center in the Dallas/Fort Worth area and subsequently transferred the carrying value of $2.8 million from premises and equipment, net to other real estate owned. During 2017, two tracts of land owned by the Company were sold for a net gain of $1.5 million . Net gains or losses on business-use property are reflected on the statement of income in (loss) gain on sales and disposals of other assets, net. The following schedule presents the Company's capital leases: December 31, (Dollars in thousands) 2018 2017 Gross book value $ 1,665 $ 1,665 Accumulated amortization (included as a component of accumulated depreciation) (1,204 ) (963 ) Net book value $ 461 $ 702 Capital lease obligations $ 508 $ 758 The Company also leases certain real estate for its banking premises, as well as certain equipment, under non-cancelable operating leases that expire at various dates through 2037. Management expects that, in the normal course of business, most leases that expire will be renewed or replaced by other similar leases. The Company recognizes escalating lease payments on a straight-line basis over the term of each respective lease with the difference between cash payment and rent expense recognized being recorded as deferred rent (included in accrued expenses and other liabilities) in the accompanying consolidated balance sheets. Depreciation expense for premises and equipment totaled $4.9 million , $5.3 million and $6.4 million for the years ended December 31, 2018 , 2017 and 2016 , respectively. Minimum future lease obligations for capital and operating leases at December 31, 2018 , were as follows: (Dollars in thousands) Year ended December 31, Capital Leases Operating Leases 2019 $ 276 $ 4,392 2020 253 4,113 2021 — 3,775 2022 — 3,537 2023 — 3,109 Thereafter — 10,690 Total 529 29,616 Less amounts representing interest 21 — Total lease obligations $ 508 $ 29,616 Total lease and rental expense for the years ended December 31, 2018 , 2017 and 2016 was $4.4 million , $4.2 million and $4.0 million , respectively, and was included in occupancy and equipment, net in the accompanying consolidated statements of income.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Note 7 - Goodwill and Other Intangible Assets During 2018, the Company recorded goodwill totaling $4.5 million and other intangible assets totaling $4.9 million in connection with the RCF acquisition. The components of the Company's goodwill and other intangible assets are as follows: (Dollars in thousands) December 31, 2018 Weighted Avg. Remaining Useful Life (Yrs.) Gross Accumulated Amortization Net Goodwill — $ 26,741 $ — $ 26,741 Other intangible assets: Core deposit intangibles 1.8 1,260 (945 ) 315 Relationship based intangibles 9.4 7,304 (1,819 ) 5,485 Tradename 2.3 186 (46 ) 140 Non-compete 1.3 270 (90 ) 180 Total $ 35,761 $ (2,900 ) $ 32,861 December 31, 2017 Goodwill — $ 22,192 $ — $ 22,192 Other intangible assets: Core deposit intangibles 2.8 1,260 (754 ) 506 Relationship based intangibles 8.1 3,996 (2,358 ) 1,638 Total $ 27,448 $ (3,112 ) $ 24,336 There were no changes to the carrying amount of the Company's goodwill during the year ended December 31, 2017 . Amortization expense on other intangible assets totaled $961,000 , $518,000 and $1.5 million for the years ended December 31, 2018 , 2017 and 2016 , respectively, and was included as a component of other noninterest expense in the consolidated statements of income. Estimated future amortization expense for intangible assets remaining at December 31, 2018 , was as follows: (Dollars in thousands) Years Ended December 31, 2019 $ 1,322 2020 1,060 2021 844 2022 689 2023 582 Thereafter 1,623 Total $ 6,120

Mortgage Banking

Mortgage Banking	12 Months Ended
	Dec. 31, 2018
Mortgage Banking [Abstract]
Mortgage Banking	Note 8 - Mortgage Banking The following table presents the Company's revenue from mortgage banking operations: (Dollars in thousands) Years Ended December 31, Mortgage banking revenue 2018 2017 2016 Origination $ 854 $ 1,281 $ 1,312 Gain on sale of loans held for sale 6,403 11,615 12,546 Servicing 7,081 7,872 8,146 Total gross mortgage revenue 14,338 20,768 22,004 Mortgage derivatives gain (loss) (725 ) (205 ) (24 ) MSR change due to payoffs and paydowns (3,618 ) (4,005 ) (4,425 ) MSR and hedge fair value adjustment (400 ) (249 ) (2,686 ) Gain (loss) on MSR sale (1) 25 (503 ) — Mortgage banking revenue $ 9,620 $ 15,806 $ 14,869 ____________________________ (1) Amount shown during the year ended December 31, 2018, reflects final settlement on a loan servicing portfolio sold during the year ended December 31, 2017. Management uses mortgage-backed securities to mitigate the impact of changes in fair value of MSRs. See Note 11 - Derivative Financial Instruments for further information. Mortgage Servicing Rights Activity in MSRs was as follows: Years Ended December 31, (Dollars in thousands) 2018 2017 2016 Balance at beginning of period $ 24,182 $ 29,385 $ 31,522 Origination of servicing rights 1,895 3,061 4,230 Change in fair value, including amortization, net (963 ) (6,014 ) (6,367 ) Sale of servicing rights — (2,250 ) — Balance at end of period $ 25,114 $ 24,182 $ 29,385 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, which the Company refers 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 claims may be made until the loan is paid in full. When a putback claim is received, the Company evaluates the claim and takes appropriate actions based on the nature of the claim. The Company is required by Federal National Mortgage Association and Federal Home Loan Mortgage Corporation to provide a response to putback claims within 60 days of the date of receipt. There were no mortgage loan servicing putback expenses incurred by the Company during 2018 and $106,000 and $83,000 for the years ended December 31, 2017 and 2016, respectively. At December 31, 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 depend 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 a delinquent loan for an amount equal to 100% 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 included in the balance sheet as mortgage loans held for sale, regardless of whether the Company intends to exercise the buy-back option. These loans totaling $30.6 million and $32.6 million at December 31, 2018 , and December 31, 2017 , respectively, were reported as held for sale at lower of cost or market and included in mortgage loans held for sale and FHLB advances and other borrowings in the consolidated financial statements.

Deposits

Deposits	12 Months Ended
	Dec. 31, 2018
Banking and Thrift [Abstract]
Deposits	Note 9 - Deposits Deposit balances are summarized as follows: December 31, (Dollars in thousands) 2018 2017 Noninterest-bearing demand $ 951,015 $ 832,853 Interest bearing demand 738,725 738,967 Money market 815,997 900,039 Brokered (1) 332,341 276,214 Savings 148,508 144,848 Time deposits (1) 796,552 619,093 Total Deposits $ 3,783,138 $ 3,512,014 ____________________________ (1) Brokered time deposits of $7.9 million are included in the brokered category for December 31, 2018. Municipal deposits totaled $395.0 million and $339.9 million at December 31, 2018 and 2017 , respectively. Included in time deposits at December 31, 2018 and 2017 , are $364.1 million and $224.8 million , respectively, of time deposits in denominations of $250,000 or more, inclusive of any brokered time deposits. Maturities of time deposits, including any brokered time deposits at December 31, 2018, are as follows: (Dollars in thousands) Year Ended December 31, 2019 $ 472,750 2020 235,714 2021 45,388 2022 30,648 2023 19,903 Total $ 804,403 At December 31, 2018 and 2017 , overdrawn deposits of $841,000 and $640,000 , respectively, were reclassified as unsecured loans.

Borrowings

Borrowings	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Borrowings	Note 10 - Borrowings Borrowed funds are summarized as follows: December 31, (Dollars in thousands) 2018 2017 Overnight repurchase agreements with depositors $ 40,314 $ 36,178 Short-term FHLB advances (1) 100,000 — GNMA repurchase liability 30,649 32,575 Long-term FHLB advances (2) 274,261 75,604 Total FHLB advances and other borrowings $ 445,224 $ 144,357 Junior subordinated debentures, net $ 9,644 $ 9,619 __________________________ (1) Short-term FHLB advances carried a fixed interest rate of 2.7% and matured on January 2, 2019. (2) Includes an FHLB advance of $250.0 million at December 31, 2018, which has a final maturity in 2033 that may be callable quarterly at the option of the FHLB beginning in the third quarter of 2019. Short-Term Borrowings As of December 31, 2018 , and 2017 , the Company had unsecured lines of credit for the purchase of federal funds in the amount of $180.0 million and $125.0 million respectively, with no amounts outstanding at either date. It is customary for the financial institutions granting the unsecured lines of credit to require a minimum amount of cash be held on deposit at that institution. Amounts required to be held on deposit are typically $250,000 or less, and the Company has complied with all compensating balance requirements to allow utilization of these lines of credit. Securities sold under agreements to repurchase consist of the Company's obligations to other parties and mature on a daily basis. These obligations to other parties carried a daily average interest rate of 0.86% and 0.29% for the years ended December 31, 2018 , and 2017 , respectively. Long-Term Borrowings Interest rates for FHLB long-term advances outstanding at December 31, 2018 , ranged from 1.65% to 5.72% , and at December 31, 2017 , ranged from 1.99% to 5.72% . These advances are all fixed rate and are subject to restrictions or penalties in the event of prepayment. Scheduled maturities of long-term advances from the FHLB at December 31, 2018 , are as follows: (Dollars in thousands) Years Ended December 31, 2019 $ 828 2020 1,099 2021 1,142 2022 2,551 2023 4,451 Thereafter (1) 264,190 Total $ 274,261 __________________________ (1) Includes an FHLB advance of $250.0 million at December 31, 2018, which has a final maturity in 2033 that may be callable quarterly at the option of the FHLB beginning in the third quarter of 2019. As of December 31, 2018 , the Company held 16 unfunded letters of credit from the FHLB totaling $186.6 million with expiration dates ranging from February 14, 2019, to November 30, 2020. As of December 31, 2017, the Company held 14 unfunded letters of credit from the FHLB totaling $230.1 million with expiration dates ranging from January 11, 2018, to February 15, 2019. Security for all indebtedness and outstanding commitments to the FHLB consists of a blanket floating lien on all of the Company's first mortgage loans, commercial real estate and other real estate loans, as well as the Company's investment in capital stock of the FHLB and deposit accounts at the FHLB. The net amounts available under the blanket floating lien as of December 31, 2018 , and 2017 , were $468.8 million and $649.0 million , respectively. Additionally, as of December 31, 2018, the Company had the availability to borrow $795.5 million from the discount window at the Federal Reserve Bank of Dallas, with $1.05 billion in commercial and industrial loans pledged as collateral. There were no borrowings against this line as of December 31, 2018. Holding Company Line of Credit During 2018, the Company entered into a Loan Agreement (the "Loan Agreement") with NexBank SSB ("Lender") pursuant to which the Lender will make one or more revolving credit loans of up to $50 million at any time that the Company may use for working capital and general corporate purposes. The principal amounts borrowed under the Loan Agreement will bear interest at a variable rate equal to the applicable one-month LIBOR rate plus 3.25% . The line of credit available to the Company under the Loan Agreement expires on October 5, 2021, or such date of the acceleration of the obligation pursuant to the Loan Agreement, at which time all amounts borrowed, together with applicable interest, fees and other amounts owed by the Company shall be due and payable. There were no outstanding revolving credit loans under the Loan Agreement as of December 31, 2018. In connection with the entry into the Loan Agreement, the Company issued the Lender a Revolving Promissory Note dated October 5, 2018 (the "Note") in a principal amount of up to $50 million . The Company's obligations under the Loan Agreement and the Note are secured by a pledge of all of the issued and outstanding shares of Origin Bank (such shares, the "Collateral"), pursuant to the Pledge and Security Agreement, dated October 5, 2018 (the "Pledge Agreement"). The Loan Agreement, Note and the Pledge Agreement contain customary representations, warranties and covenants, including covenants requiring the Company and Origin Bank to maintain certain financial and capital ratios. The Loan Agreement, Note and the Pledge Agreement also provide for certain events of default, the occurrence of which, after any applicable cure period, would permit the Lender, among other things, to accelerate payment of all amounts outstanding under the Loan Agreement and the Note, as applicable, and to exercise its remedies with respect to the Collateral, including the sale of the Collateral. Junior Subordinated Debentures The Company has two wholly-owned, unconsolidated subsidiary grantor trusts that were established for the purpose of issuing trust preferred securities. The trust preferred securities accrue and pay distributions periodically at specified annual rates as provided in each trust agreement. The trusts used the net proceeds from each of the offerings to purchase a like amount of junior subordinated debentures (the "debentures") of the Company. The debentures are the sole assets of the trusts. The Company's obligations under the debentures and related documents, taken together, constitute a full and unconditional guarantee by the Company of the obligations of the trusts. The trust preferred securities are mandatorily redeemable upon maturity of the debentures, or upon earlier redemption as provided in the respective indentures. The Company has the right to redeem the debentures, in whole or in part on or after specific dates, at a redemption price specified in the indentures governing the debentures plus any accrued but unpaid interest to the redemption date. Due to the extended maturity date of the trust preferred securities, they are included in Tier I capital for regulatory purposes, subject to certain limitations. The following table is a summary of the terms of the current debentures at December 31, 2018 : (Dollars in thousands) Issuance Trust Issuance Date Maturity Date Amount Outstanding Rate Type Current Rate Maximum Rate CTB Statutory Trust I 07/2001 07/2031 $ 6,702 Variable (1) 5.83 % 12.50 % First Louisiana Statutory Trust I 09/2006 12/2036 4,124 Variable (2) 4.59 16.00 $ 10,826 ____________________________ (1) The trust preferred securities reprice quarterly based on the three-month LIBOR plus 3.30% , with the last reprice date on October 29, 2018. (2) The trust preferred securities reprice quarterly based on the three-month LIBOR plus 1.80% , with the last reprice date on December 13, 2018. The balance of the debentures outstanding varies from the amounts carried on the consolidated balance sheets due to the remaining purchase discount of $1.2 million at both December 31, 2018 and 2017 , which was established with the acquisition of the issuer of the First Louisiana Statutory Trust I securities, and which is being amortized over the remaining life of the securities using the interest method.

Derivative Financial Instrument

Derivative Financial Instruments	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Note 11 - 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 consolidated statement of income on a recurring basis. Cash Flow Hedges of Interest Rate Risk The Company is a party to an interest rate swap agreement under which the Company receives interest at a variable rate and pays at a fixed rate. The 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 of the swap agreement. 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 without 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 December 31, 2018 , 2017 and 2016 , as well as the effect of these derivative instruments on the Company's consolidated statements of income for the years ended December 31, 2018 and 2017 : Notional Amounts (1) Fair Values (Dollars in thousands) December 31, December 31, Derivatives designated as cash flow hedging instruments: 2018 2017 2018 2017 Interest rate swaps included in other assets $ 10,500 $ 10,500 $ 152 $ 41 Derivatives not designated as hedging instruments: Interest rate swaps included in other assets $ 127,512 $ 132,959 $ 2,302 $ 2,314 Interest rate swaps included in other liabilities 145,857 159,479 (2,625 ) (3,221 ) Forward commitments to purchase mortgage-backed securities included in other assets (liabilities) 140,000 160,000 709 (50 ) Forward commitments to sell residential mortgage loans included in other liabilities 24,750 57,400 (221 ) (49 ) Interest rate-lock commitments on residential mortgage loans included in other assets 16,244 37,072 400 791 $ 454,363 $ 546,910 $ 565 $ (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 December 31, 2018 and 2017, were as follows: Weighted-Average Interest Rate December 31, 2018 2017 Interest rate swaps: Paid Received Paid Received Cash flow hedges 4.81 % 5.36 % 4.81 % 4.19 % Non-hedging interest rate swaps - financial institution counterparties 5.02 4.67 4.81 3.45 Non-hedging interest rate swaps - customer counterparties 4.73 5.05 3.54 4.89 Gains and losses recognized on derivative instruments not designated as hedging instruments are as follows: (Dollars in thousands) Years Ended December 31, Derivatives not designated as hedging instruments: 2018 2017 2016 Amount of loss recognized in mortgage banking revenue (1) $ (2,450 ) $ (259 ) $ (2,570 ) Amount of gain recognized in other non-interest income 584 707 842 ____________________________ (1) Gains and losses on these instruments are largely offset by market fluctuations in mortgage servicing rights. See Note 8 - Mortgage Banking for more information on components of mortgage banking revenue. Some interest rate swaps included in other assets were 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 consolidated balance sheets, and any impact of netting these amounts would not be significant. At December 31, 2018 , and December 31, 2017 , the Company had cash collateral on deposit with swap counterparties totaling $1.9 million and $7.0 million , respectively. These amounts are included in interest-bearing deposits in banks in the consolidated balance sheets and are considered restricted cash until such time as the underlying swaps are settled.

Stock and Incentive Compensatio

Stock and Incentive Compensation Plans	12 Months Ended
	Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock and Incentive Compensation Plans	Note 12 - 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 ("2012 Plan"). Additionally, awards have been issued prior to the establishment of the 2012 Plan, some of which were still outstanding at December 31, 2018. 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 December 31, 2018 , the maximum number of shares of the Company's common stock available for issuance under the 2012 Plan was 986,348 shares. Share-based compensation cost charged to income for the years ended December 31, 2018 , 2017 and 2016 is presented below: Years Ended December 31, (Dollars in thousands) 2018 2017 2016 Restricted stock $ 1,462 $ 1,180 $ 1,082 Stock options (1) — (30 ) 465 Total stock compensation expense $ 1,462 $ 1,150 $ 1,547 Related tax benefits recognized in net income $ 307 $ 403 $ 541 ____________________________ (1) Stock option expense for the year ended December 31, 2017 , included expense reversal related to 16,638 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: Years Ended December 31, 2018 2017 2016 Shares Weighted Average Grant-Date Fair Value Shares Weighted Average Grant-Date Fair Value Shares Weighted Average Grant-Date Fair Value Nonvested shares, January 1, 61,293 $ 24.61 84,019 $ 24.22 102,012 $ 24.56 Granted 151,324 37.51 35,913 25.14 31,477 23.19 Vested (36,209 ) 27.70 (55,003 ) 24.39 (43,770 ) 24.19 Forfeited (2,001 ) 37.47 (3,636 ) 24.12 (5,700 ) 24.69 Nonvested shares, December 31, 174,407 $ 35.01 61,293 $ 24.61 84,019 $ 24.22 During the year ended December 31, 2018 , award recipients surrendered and the Company retired 910 shares to cover taxes owed upon the vesting of restricted stock awards. During the year ended December 31, 2017 , award recipients surrendered and the Company retired 11,843 shares to cover taxes owed upon the vesting of restricted stock awards. During the year ended December 31, 2016, award recipients surrendered and the Company retired 6,828 shares to cover taxes owed upon the vesting of restricted stock awards. At December 31, 2018 , there was $5.3 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 3.3 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 certain business combinations. 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 years ended December 31, 2018 , 2017 and 2016. (Dollars in thousands, except per share amounts) Number of Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term (in years) Aggregate Intrinsic Value (1) Year Ended December 31, 2016 Outstanding at January 1, 2016 531,922 $ 11.69 6.39 $ 7,322 Exercised (169,000 ) 12.34 — 1,633 Expired (4,284 ) 12.29 — — Outstanding at December 31, 2016 358,638 11.37 7.79 3,844 Exercised (22,500 ) 12.29 — 304 Forfeited and expired (16,638 ) 23.89 — — Outstanding at December 31, 2017 319,500 10.65 7.07 4,840 Exercised (45,500 ) 12.29 — — Outstanding at December 31, 2018 274,000 $ 10.38 6.75 $ 6,493 Exercisable at December 31, 2018 274,000 $ 10.38 6.75 $ 6,493 ____________________________ (1) The intrinsic value for stock options for periods at or prior to December 31, 2017, is calculated based on the difference between the weighted average exercise price of the underlying awards and the weighted average market price of the Company's common stock calculated over thirty days immediately prior to the last day of the Company's fiscal year.

Employee Retirement Plan

Employee Retirement Plan	12 Months Ended
	Dec. 31, 2018
Retirement Benefits [Abstract]
Employee Retirement Plan	Note 13 - Employee Retirement Plan Defined Contribution Retirement Plan The Company maintains the Origin Bancorp, Inc. Employee Retirement Plan ("Retirement Plan") that is a defined contribution benefit plan. During 2018, the Company amended and restated its Employee Stock Ownership Plan ("ESOP") as the Retirement Plan, a profit-sharing plan that allows contributions under section 401(k) of the Internal Revenue Code. The Retirement Plan covers substantially all employees who have been employed 25 days and meet certain other requirements and employment classification criteria. Under the provisions of the Retirement Plan, the Company may make discretionary matching contributions on a percentage, not to exceed 6% , of a participant's elective deferrals. Any percentage(s) determined by the Company shall apply to all eligible persons for the entire plan year. Historically, the Company has matched 50% of the first 6% of eligible compensation deferred by a participant. Eligible compensation includes salaries, wages, overtime and bonuses, and excludes expense reimbursements and fringe benefits. In addition, the Company may make additional discretionary contributions out of current or accumulated net profit. Matching contributions are invested as directed by the participant. The total of the Company's contributions may not exceed limitations set forth in the Retirement Plan document or the maximum deductible under the Internal Revenue Code. Although it has not expressed any intention to do so, the Company has the right to terminate the Retirement Plan at any time. The total expense related to the Retirement Plan, including optional contributions, was $1.6 million for the year ended December 31, 2018 , and $1.4 million for each of the years ended December 31, 2017 and 2016 . There were no unallocated shares within the ESOP at December 31, 2017. At December 31, 2017, the fair value of shares of common stock held by the Retirement Plan was deducted from permanent stockholders' equity in the consolidated balance sheets and reflected in a line item below liabilities and above stockholders' equity. This presentation was necessary in order to recognize the put option within the Retirement Plan-owned shares, consistent with SEC guidelines, that was present when the Company was not publicly traded. The Company used a valuation by an external third party to determine the maximum possible cash obligation related to those securities. Increases or decreases in the value of the cash obligation were included in a separate line item in the statements of changes in stockholders' equity. The fair value of allocated shares subject to this repurchase obligation totaled $35.0 million at December 31, 2017. Employees no longer have the right to put the stock back to the Company since the completion of the Company's initial public offering in May of 2018. Other Benefit Plans The Company has established deferred compensation plans for some of its key executives for which deferred compensation liabilities are recorded as a component of accrued expenses and other liabilities in the accompanying consolidated balance sheets. The deferred compensation liability was $9.0 million and $8.3 million as of December 31, 2018, and December 31, 2017, respectively. The expense recorded for the deferred compensation plan totaled $1.1 million for each of the years ended December 31, 2018, and 2017, and $1.4 million for the year ended December 31, 2016.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Note 14 - Income Taxes The provision for income taxes is as follows: (Dollars in thousands) Years Ended December 31, Federal income taxes: 2018 2017 2016 Current $ 4,562 $ 715 $ 1,321 Deferred 5,658 4,644 1,532 State income taxes: Current 638 167 195 Deferred (21 ) 287 (132 ) Income tax expense (benefit) $ 10,837 $ 5,813 $ 2,916 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%. The Company completed its analysis of the remeasurement of the Company's deferred tax asset within the measurement period and the amount is not materially different from the provisional amount recorded in 2017. 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. A reconciliation of income tax expense at the statutory rate to the Company's actual income tax expense is below: Years Ended December 31, 2018 2017 2016 (Dollars in thousands) Amount % Amount % Amount % Income taxes computed at statutory rate $ 13,113 21.00 % $ 7,169 35.00 % $ 5,518 35.00 % Tax exempt revenue, net of nondeductible interest (907 ) (1.45 ) (1,629 ) (7.95 ) (1,717 ) (10.89 ) Low-income housing tax credits, net of amortization (691 ) (1.11 ) (624 ) (3.05 ) (936 ) (5.94 ) Other tax credits, net of add-backs (1,218 ) (1.95 ) (1,002 ) (4.89 ) (1,002 ) (6.36 ) Bank-owned life insurance income (150 ) (0.24 ) (221 ) (1.08 ) (248 ) (1.57 ) State income taxes, net of federal benefit 469 0.75 186 0.91 40 0.26 Stock-based compensation (252 ) (0.40 ) (80 ) (0.39 ) (461 ) (2.92 ) Deferred tax asset and income tax receivable true-up — — — — 2,468 15.65 Return to provision adjustment (67 ) (0.11 ) (241 ) (1.17 ) (1,026 ) (6.51 ) Deferred tax write-down for enacted tax rate changes 231 0.37 1,972 9.63 — — Other 309 0.49 283 1.37 280 1.78 Total income tax expense $ 10,837 17.35 % $ 5,813 28.38 % $ 2,916 18.50 % Significant components of deferred tax assets and liabilities are as follows: (Dollars in thousands) December 31, Deferred tax assets: 2018 2017 Credit loss allowances $ 7,762 $ 8,535 Deferred compensation and share-based compensation 2,471 2,286 Net operating loss carryforwards 1,238 1,241 Credit carryforwards — 5,968 Other 1,068 454 Gross deferred tax assets 12,539 18,484 Valuation allowance (867 ) (797 ) Deferred tax assets net of valuation allowance $ 11,672 $ 17,687 Deferred tax liabilities: Available for sale securities mark to market $ 440 $ 879 Basis difference in premises and equipment 1,655 2,082 Intangible assets 218 338 Mortgage servicing rights 5,426 5,225 Other 125 137 Gross deferred tax liabilities 7,864 8,661 Net deferred tax asset $ 3,808 $ 9,026 During 2016, the Company elected certain tax accounting method changes with the Internal Revenue Service for originated mortgage servicing rights, certain securities, deferred rents and tenant improvement allowances for certain leases. The result of these accounting changes generated tax net operating losses and credit carryforwards for the 2016 tax year. As of December 31, 2018, the Company has utilized all of the net operating losses and tax credit carryforwards generated in 2016. At December 31, 2018, the Company has $4.0 million in Federal gross net operating loss carryforwards acquired in previous business combinations expiring between 2023 and 2031, and $9.3 million in state net operating losses. Due to limitations on the amounts of these losses that can be recognized annually, the Company has determined that it is more likely than not that some of these net operating loss carryforwards will expire unused, and has established a $867,000 valuation allowance related to these carryforwards. 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	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Accumulated Other Comprehensive Income	Note 15 - Accumulated Other Comprehensive Income Accumulated other comprehensive income ("AOCI") includes the after-tax change in unrealized gains and losses on AFS securities and cash flow hedging activities. (Dollars in thousands) Unrealized Gains (Losses) on AFS Securities Unrealized Gains (Losses) on Cash Flow Hedges Accumulated Other Comprehensive Income Balance at January 1, 2016 $ 5,289 $ (105 ) $ 5,184 Net change (1,784 ) 63 (1,721 ) Balance at January 1, 2017 3,505 (42 ) 3,463 Net change (2,225 ) 69 (2,156 ) Balance at January 1, 2018 1,280 27 1,307 Net change (4,157 ) 88 (4,069 ) Reclassification of tax effects related to the adoption of ASU 2018-02 (1) : Current (293 ) 17 (276 ) Deferred 569 (11 ) 558 Balance at December 31, 2018 $ (2,601 ) $ 121 $ (2,480 ) ____________________________ (1) During the first quarter of 2018, the Company adopted ASU 2018-02. The ASU was issued by the 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	12 Months Ended
	Dec. 31, 2018
Banking and Thrift [Abstract]
Capital and Regulatory Matters	Note 16 - 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 ("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 December 31, 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 December 31, 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 December 31, 2018 , and December 31, 2017 , are presented in the following table: (Dollars in thousands) December 31, 2018 Actual Minimum Capital Required - Basel III Fully Phased-In To be Well Capitalized Under Prompt Corrective Action Provisions Common Equity Tier 1 Capital to Risk-Weighted Assets Amount Ratio Amount Ratio Amount Ratio Origin Bancorp, Inc. $ 519,468 11.94 % $ 304,431 7.00 % N/A N/A Origin Bank 508,826 11.73 303,621 7.00 $ 281,934 6.50 % Tier 1 Capital to Risk-Weighted Assets Origin Bancorp, Inc. 528,786 12.16 369,668 8.50 N/A N/A Origin Bank 508,826 11.73 368,683 8.50 346,996 8.00 Total Capital to Risk-Weighted Assets Origin Bancorp, Inc. 564,437 12.98 456,647 10.50 N/A N/A Origin Bank 544,477 12.55 455,430 10.50 433,743 10.00 Leverage Ratio Origin Bancorp, Inc. 528,786 11.21 188,711 4.00 N/A N/A Origin Bank 508,826 10.81 188,229 4.00 235,287 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 depends on 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 December 31, 2018 , the Bank could pay aggregate dividends of up to $53.7 million to the Company without prior regulatory approval.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 17 - 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: December 31, (Dollars in thousands) 2018 2017 Commitments to extend credit $ 1,178,735 $ 1,068,088 Standby letters of credit 46,860 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 December 31, 2018 , and December 31, 2017 , these credit card guarantees totaled $772,000 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 December 31, 2018 , and December 31, 2017 , the Company had FHLB letters of credit totaling $172.0 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 $1.4 million and $2.0 million at December 31, 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 actions arising in the ordinary course of business. At this time, management does not expect that loss contingencies, if any, arising from any such proceedings, either individually or in the aggregate, would have a material adverse effect on the consolidated financial position or liquidity of the Company.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2018
Related Party Transactions [Abstract]
Related Party Transactions	Note 18 - Related Party Transactions Loans to executive officers, directors, and their affiliates at December 31, 2018 and 2017 were as follows: (Dollars in thousands) 2018 2017 Balance, beginning of year $ 9,934 $ 11,754 Advances 1,775 4,354 Principal repayments (1,845 ) (6,174 ) Effect of changes in composition of related parties (8,536 ) — Balance, end of year $ 1,328 $ 9,934 Commitments to extend credit $ 3,420 $ 12,355 None of the above loans were considered non-performing or potential problem loans. These loans were made in the ordinary course of business and on substantially the same terms, including interest rates and collateral, as those prevailing at the time for comparable transactions with other unaffiliated persons and do not involve more than normal risk of collectability. Deposits from related parties held by the Company at December 31, 2018 and 2017 , amounted to $30.3 million and $38.0 million , respectively.

Business Combinations

Business Combinations	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Business Combinations	Note 19 - Business Combinations All acquisitions are accounted for using the acquisition method of accounting. Accordingly, the assets and liabilities of 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 statements 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 the date of the acquisition, 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.

Condensed Parent Company Only F

Condensed Parent Company Only Financial Statements	12 Months Ended
	Dec. 31, 2018
Condensed Financial Information Disclosure [Abstract]
Condensed Parent Company Only Financial Statements	Note 20 - Condensed Parent Company Only Financial Statements Financial statements of Origin Bancorp, Inc. (parent company only) are as follows: (Dollars in thousands) December 31, Condensed Balance Sheets 2018 2017 Assets Cash and cash equivalents $ 5,882 $ 10,566 Investment in affiliates/subsidiaries 543,515 450,598 Other assets 10,393 5,500 Total assets $ 559,790 $ 466,664 Liabilities and Stockholders' Equity Junior subordinated debentures $ 9,644 $ 9,619 Accrued expenses and other liabilities 367 1,703 Total liabilities 10,011 11,322 Retirement Plan-owned (formerly ESOP) shares — 34,991 Stockholders' Equity Preferred stock — 65,258 Common stock 118,633 97,594 Additional paid‑in capital 242,041 146,061 Retained earnings 191,585 145,122 Accumulated other comprehensive income (2,480 ) 1,307 Total stockholders' equity 549,779 455,342 Less: Retirement Plan-owned (formerly ESOP) shares — 34,991 Total stockholders' equity 549,779 420,351 Total liabilities and stockholders' equity $ 559,790 $ 466,664 (Dollars in thousands) Years Ended December 31, Condensed Statements of Income 2018 2017 2016 Income: Dividends from subsidiaries $ 4,500 $ 8,000 $ 5,625 Other 2,052 41 11 Total income 6,552 8,041 5,636 Expenses: Salaries and employee benefits 658 433 600 Other 2,015 1,384 1,617 Total expenses 2,673 1,817 2,217 Income before income taxes and equity in undistributed net income of subsidiaries 3,879 6,224 3,419 Income tax benefit 84 477 1,281 Income before equity in undistributed net income of subsidiaries 3,963 6,701 4,700 Equity in undistributed net income of subsidiaries 47,642 7,968 8,150 Net income $ 51,605 $ 14,669 $ 12,850 (Dollars in thousands) Years Ended December 31, Condensed Statements of Cash Flows 2018 2017 2016 Cash flows from operating activities: Net income $ 51,605 $ 14,669 $ 12,850 Adjustments to reconcile net income to net cash provided by operating activities: Deferred income taxes 9 11 9 Equity in undistributed net income of subsidiaries (47,642 ) (7,968 ) (8,150 ) Amortization of subordinated debentures discount 25 23 21 Stock compensation 356 78 65 Other, net (2,543 ) 5,488 215 Net cash provided by operating activities 1,810 12,301 5,010 Cash flows from investing activities: Capital contributed to subsidiaries (45,794 ) — (37,808 ) Net purchases of non-marketable equity securities held in other financial institutions (2,213 ) (2,065 ) — Net cash used in investing activities (48,007 ) (2,065 ) (37,808 ) Cash flows from financing activities: Net decrease in short-term borrowings — — (3,600 ) Dividends paid (5,941 ) (6,996 ) (5,764 ) Taxes paid related to net share settlement of equity awards (23 ) (410 ) (739 ) Cash received on exercise of stock options 559 186 737 Proceeds from issuance of common stock 95,178 — 41,809 Payment to repurchase preferred stock (48,260 ) — 1,998 Net cash provided by (used by) financing activities 41,513 (7,220 ) 34,441 Net (decrease) increase in cash and cash equivalents (4,684 ) 3,016 1,643 Cash and cash equivalents at beginning of year 10,566 7,550 5,907 Cash and cash equivalents at end of year $ 5,882 $ 10,566 $ 7,550

Summary of Quarterly Financial

Summary of Quarterly Financial Statements (Unaudited)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Summary of Quarterly Financial Statements (Unaudited)	Note 21 - Summary of Quarterly Financial Statements (Unaudited) The following tables present selected unaudited data from the Company's condensed consolidated quarterly statements of income for the quarterly periods within the years ended December 31, 2018 and 2017 : Quarters Ended - 2018 (Dollars in thousands) December 31 September 30 June 30 March 31 Total interest income $ 53,058 $ 48,842 $ 44,752 $ 41,444 Total interest expense 10,997 9,345 7,582 6,720 Net interest income 42,061 39,497 37,170 34,724 Provision for credit losses 1,723 504 311 (1,524 ) Net interest income after provision for credit losses 40,338 38,993 36,859 36,248 Non-interest income, exclusive of (loss) gain on sales of securities, net 10,596 10,237 10,615 9,800 (Loss) gain on sales of securities, net (8 ) — — — Non-interest expense 35,023 34,344 32,012 29,857 Income before income taxes 15,903 14,886 15,462 16,191 Income tax expense 2,725 2,568 2,760 2,784 Net income 13,178 12,318 12,702 13,407 Less preferred stock dividends — — 808 1,115 Less income allocated to participating stockholders (1) 86 54 40 553 Net income available to common stockholders (1) $ 13,092 $ 12,264 $ 11,854 $ 11,739 Basic earnings per common share (1) $ 0.56 $ 0.52 $ 0.54 $ 0.60 Diluted earnings per common share 0.55 0.52 0.53 0.60 ____________________________ (1) Due to the methodology of how share allocations for preferred stock - Series D are computed under the two-class method, the sum of the quarterly periods may not agree to the year-to-date total presented in the consolidated statements of income for the year ended December 31, 2018. Quarters Ended - 2017 (Dollars in thousands) December 31 September 30 June 30 March 31 Total interest income $ 40,408 $ 39,614 $ 37,293 $ 35,278 Total interest expense 6,190 5,746 5,376 4,976 Net interest income 34,218 33,868 31,917 30,302 Provision for credit losses 242 3,327 1,953 2,814 Net interest income after provision for credit losses 33,976 30,541 29,964 27,488 Non-interest income 8,715 5,041 5,306 10,125 Non-interest expense 31,771 40,443 30,674 27,786 Income (loss) before income taxes 10,920 (4,861 ) 4,596 9,827 Income tax expense (benefit) 5,148 (2,688 ) 773 2,580 Net income (loss) 5,772 (2,173 ) 3,823 7,247 Less preferred stock dividends 1,116 1,115 1,115 1,115 Less income allocated to participating stockholders (1) 194 3 103 267 Net income (loss) available to common stockholders (1) $ 4,462 $ (3,291 ) $ 2,605 $ 5,865 Basic earnings (loss) per common share (1) $ 0.23 $ (0.17 ) $ 0.13 $ 0.30 Diluted earnings (loss) per common share (1) 0.23 (0.17 ) 0.13 0.30 ____________________________ (1) Due to the methodology of how share allocations for preferred stock - Series D and losses are allocated under the two-class method, the sum of the quarterly periods may not agree to the year-to-date total presented in the consolidated statements of income for the year ended December 31, 2017.

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation . The consolidated financial statements include the accounts of the Company and all other entities in which Origin Bancorp, Inc. 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 ("RCF"). All significant intercompany balances and transactions have been eliminated in consolidation. The Company's accounting and financial reporting policies conform, in all material respects, to accounting principles generally accepted in the United States ("U.S. GAAP") and to general practices within the financial services industry. The Company has evaluated subsequent events for potential recognition and/or disclosure through the date these consolidated financial statements were issued.
Reclassifications	Reclassifications . Certain amounts previously reported have been reclassified to conform to the current presentation. Such reclassifications had no effect on prior year net income or stockholders' equity.
Variable Interest Entities	Variable Interest Entities . The Company determines whether it has a controlling financial interest in an entity by first evaluating whether the entity is a voting interest entity or a variable interest entity ("VIE") under U.S. GAAP. Voting interest entities are entities in which the total equity investment at risk is sufficient to enable the entity to finance itself independently and provides the equity holders with the obligation to absorb losses, the right to receive residual returns and the right to make decisions about the entity's activities. The Company consolidates voting interest entities in which it has all, or at least a majority of, the voting interest. As defined in applicable accounting standards, VIEs are entities that lack one or more of the characteristics of a voting interest entity. A controlling financial interest in a VIE is present when an enterprise has both the power to direct the activities of the VIE that most significantly impact the VIE's economic performance and an obligation to absorb losses or the right to receive benefits that could potentially be significant to the VIE. The enterprise with a controlling financial interest, known as the primary beneficiary, consolidates the VIE. The Company's wholly owned subsidiaries CTB Statutory Trust I and First Louisiana Statutory Trust I are VIEs for which the Company is not the primary beneficiary. Accordingly, the accounts of these trusts are not included in the Company's consolidated financial statements.
Operating Segments	Operating Segments . Operating segments are components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision-maker in deciding how to allocate resources and in assessing performance. The Bank is the only significant subsidiary upon which management makes decisions regarding how to allocate resources and assess performance. Individual bank branches offer a group of similar services, including commercial, real estate and consumer loans, time deposits, checking and savings accounts, all with similar operating and economic characteristics. While the chief operating decision-maker monitor the revenue streams of the various products and services, operations are managed and financial performance is evaluated on a Company-wide basis. Accordingly, all of the community banking services and branch locations are considered by management to be aggregated into one reportable operating segment, community banking. Us
Use of Estimates	Use of Estimates . To prepare financial statements in conformity with U.S. GAAP, management makes estimates and assumptions based on available information. These estimates and assumptions affect the amounts reported in the financial statements and the disclosures provided, and actual results could differ. Material estimates that are subject to significant change in the near term are the allowance for loan losses, valuation of other real estate owned, fair value of mortgage servicing rights, realization of deferred tax assets, fair values of financial instruments and the status of contingencies. Actual results could differ from those estimates.
Cash and Cash Equivalents	Cash and Cash Equivalents . For purposes of the statement of cash flows, the Company considers all cash on hand, demand deposits with other banks, federal funds sold and short term interest-bearing cash items with an original maturity less than 90 days to be cash equivalents. The Company maintains deposits with other financial institutions in amounts that exceed federal deposit insurance coverage. Furthermore, federal funds sold are essentially uncollateralized loans to other financial institutions. Management regularly evaluates the credit risk associated with the counterparties to these transactions and believes that the Company is not exposed to any significant credit risks on cash and cash equivalents.
Securities	Securities . The Company accounts for debt and equity securities as follows: Available for Sale ("AFS") - Debt and equity securities that will be held for indefinite periods of time, including securities that may be sold in response to changes in market interest or prepayment rates, needs for liquidity and changes in the availability of and the yield of alternative investments are classified as AFS. These assets are carried at fair value. Fair value is determined using published quotes. If quoted market prices are not available, fair values are based on other methods including, but not limited to the discounting of cash flows. Held to Maturity ("HTM") - Debt securities that management has the positive intent and ability to hold until maturity are classified as HTM and are carried at their remaining unpaid principal balance, net of unamortized premiums or unaccreted discounts. Securities Carried at Fair Value through Income - Debt securities for which the Company has elected the fair value option for accounting are classified as securities carried at fair value through income. Management has elected the fair value option for these items to offset the corresponding change in fair value of related interest rate swap agreements. Fair value is determined using discounted cash flows and credit quality indicators. Changes in fair value are reported through the consolidated statements of income as a part of other noninterest income. Unrealized gains and losses on AFS securities are excluded from earnings and reported net of tax in accumulated other comprehensive income until realized. Declines in the fair value of AFS and HTM securities below their cost are reflected in earnings as realized losses to the extent the impairment is deemed to be other-than-temporary credit losses. In estimating other-than-temporary impairment losses, management considers (1) the length of time and the extent to which the fair value has been less than cost, (2) the financial condition and near-term prospects of the issuer, and (3) management's intent and ability to retain the investment in the issuer for a period of time sufficient to allow for any anticipated recovery in fair value. The amount of the impairment related to other factors is recognized in other comprehensive income unless there is no ability or intent to hold to recovery. Purchase premiums and discounts are recognized in interest income using the interest method over the terms of the securities to the earlier of the call date or maturity date. Gains and losses on the sale of securities are recorded on the trade date and are determined using the specific identification method.
Non-marketable Equity Securities Held in Other Financial Institutions	Non-marketable Equity Securities Held in Other Financial Institutions . Securities with limited marketability, such as stock in the Federal Reserve Bank of Dallas ("FRB") or the Federal Home Loan Bank of Dallas ("FHLB"), are carried at cost, less impairment, if any. These investments in stock do not have readily determinable fair values. The Company's remaining equity investments in other financial institutions, totaling $11.7 million and $7.5 million at December 31, 2018 and 2017, respectively, qualify for the practicability exception under Accounting Standards Update ("ASU") 2016-01 due to having illiquid markets and are carried at cost, less impairment, plus or minus any observable price changes.
Loans Held For Sale	Loans Held for Sale . Loans held for sale include mortgage loans and are carried at fair value, with unrealized gains and losses recorded in the consolidated statements of income. Forward commitments to sell mortgage loans are acquired to reduce market risk on mortgage loans in the process of origination and mortgage loans held for sale. The forward commitments acquired by the Company for mortgage loans in process of origination are mandatory forward commitments, and the Company is required to substitute another loan or to buy back the commitment if the original loan does not fund. Typically, the Company delivers the mortgage loans within a few days after the loans are funded. These commitments are derivative instruments carried at fair value. Gains and losses resulting from sales of mortgage loans are realized when the respective loans are sold to investors. Gains and losses are determined by the difference between the selling price (including the fair value of any items such as mortgage servicing rights) and the carrying amount of the loans sold. Fees received from borrowers to guarantee the funding of mortgage loans held for sale are recognized as income or expense when the loans are sold or when it becomes evident that the commitment will not be used. 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 U.S. GAAP.
Loans	Loans . Loans that management has the intent and ability to hold for the foreseeable future, or until maturity or payoff, are reported at their outstanding unpaid principal balances adjusted for charge-offs, the allowance for loan losses, and any deferred fees or costs on originated loans. Interest income is accrued on the unpaid principal balance. Loan origination fees, and certain direct origination costs, are deferred and amortized as a yield adjustment over the lives of the related loans using the interest method. Late fees are recognized as income when earned, assuming collectability is reasonably assured. The Company has elected the fair value option on a small portion of its loans held for investment, with changes in fair value recorded in noninterest income. For these loans, the earned current contractual interest payment is recognized in interest income. Loan origination costs and fees are recognized in earnings as incurred and not deferred. Because these loans are recognized at fair value, the Company's allowance for loan losses policy does not apply to these loans. Fair value is determined using discounted cash flows and credit quality indicators. In addition to loans issued in the normal course of business, the Company considers overdrafts on customer deposit accounts to be loans and classifies these overdrafts as loans in its consolidated balance sheets. Loans are placed on nonaccrual status when management believes that the borrower's financial condition, after giving consideration to economic and business conditions and collection efforts, is such that collection of interest is doubtful, or generally when loans are 90 days or more past due. When accrual of interest is discontinued, all unpaid accrued interest is reversed. Past due status is based on contractual terms of the loan. Interest income on nonaccrual loans may be recognized to the extent cash payments are received, but payments received are usually applied to principal. Nonaccrual loans are generally returned to accrual status when principal and interest payments are less than 90 days past due, the customer has made required payments for at least six months, and the Company reasonably expects to collect all principal and interest.
Allowance for Loan Losses	Allowance for Loan Losses . The allowance for loan losses is established as losses are estimated to have occurred through a provision for loan losses charged to earnings. The allowance for loan losses is evaluated on a regular basis by management and is based upon management's periodic review of the collectability of the loans in light of historical experience, the nature and volume of the loan portfolio, adverse situations that may affect the borrower's ability to repay, estimated value of any underlying collateral, and prevailing economic conditions. This evaluation is inherently subjective as it requires estimates that are susceptible to significant revision as more information becomes available. Loans are charged off against the allowance for loan losses when management believes the loss is confirmed. Subsequent recoveries, if any, are credited to the allowance. The allowance consists of allocated and general components. The allocated component relates to loans that are classified as impaired, and an allowance is established when the discounted cash flows (or collateral value or observable market price) of the impaired loan is lower than the carrying value of that loan. The general component relates to loans that are not classified as impaired and is based on historical charge-off experience and the expected loss, given default, derived from the Company's internal risk rating process. Other adjustments may be made to the allowance for pools of loans after an assessment of internal or external influences on credit quality that are not fully reflected in the historical loss or risk rating data. Delinquency statistics are updated at least monthly and are the most meaningful indicator of the credit quality of one-to-four single family residential, home equity loans and lines of credit and other consumer loans. Internal risk ratings are considered the most meaningful indicator of credit quality for commercial and industrial, construction, and commercial real estate loans. Internal risk ratings are a key factor in identifying loans that are individually evaluated for impairment and impact management's estimates of loss factors used in determining the amount of the allowance for loan losses. Internal risk ratings are updated on a regular basis. A loan is considered impaired when, based on current information and events, it is probable that the Company will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Impaired loans include nonperforming loans and loans modified in troubled debt restructurings ("TDRs"). TDRs are loans for which the contractual terms on the loan have been modified and both of the following conditions exist: (1) the borrower is experiencing financial difficulty and (2) the restructuring constitutes a concession. Concessions could include a reduction in the interest rate on the loan, payment extensions, forgiveness of principal, forbearance or other actions intended to maximize collection. The Company assesses all loan modifications to determine whether they constitute a TDR. All TDRs are considered impaired loans. Impairment is measured on a loan-by-loan basis by either the present value of expected future cash flows discounted at the loan's effective interest rate, the loan's obtainable market price or the fair value of the collateral if the loan is collateral dependent. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower's prior payment record, and the amount of the shortfall in relation to the principal and interest owed.
Premises and Equipment, net	Premises and Equipment, net . Land is carried at cost. Buildings and improvements are stated at cost less accumulated depreciation computed using the straight-line method over the estimated useful lives of the assets, which range from 35 to 39 years. Furniture, fixtures, and equipment are stated at cost less accumulated depreciation computed using the straight-line method over the estimated useful lives of the assets, which range from three to seven years. Leasehold improvements are capitalized and depreciated using the straight-line method over the estimated useful lives of the leasehold improvements or the expected terms of the leases, if shorter.
Mortgage Servicing Rights and Transfers of Financial Assets	Mortgage Servicing Rights and Transfers of Financial Assets . Gains or losses on "servicing-retained" loan sale transactions generally include a component reflecting the differential between the contractual interest rate of the loan and the interest rate to be received by the investor. The present value of the estimated future profit for servicing the loans is also taken into account in determining the amount of gain or loss on the sale of these loans. For loans sold servicing-retained, the fair value of mortgage servicing rights is recorded as an asset, with their value estimated using a discounted cash flow methodology to arrive at the present value of future expected earnings from the servicing of the loans. Significant model inputs include prepayment speeds, discount rates, and servicing costs. Servicing revenues are based on a contractual percentage of the outstanding principal or a fixed amount per loan and are recorded as income when earned. Loans sold into the secondary market are considered transfers of financial assets. These transfers are accounted for as sales when control over the asset has been surrendered, which is deemed to have occurred when: an asset does not have any claims to it by the transferor or their creditors, including in bankruptcy or other receivership situations; the transferee obtains the unconditional right to pledge or exchange the asset; or the transfer does not include a repurchase provision above the limited recourse provisions of these loan sales.
Derivative Instruments and Hedging Activities	Derivative Instruments and Hedging Activities . All derivatives are recorded on the accompanying consolidated balance sheets at fair value. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative, whether the Company has elected to designate a derivative in a hedging relationship and apply hedge accounting and whether the hedging relationship has satisfied the criteria necessary to apply hedge accounting. Derivatives designated and qualifying as a hedge of the exposure to changes in the fair value of an asset, liability, or firm commitment attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivatives designated and qualifying as a hedge of the exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges. Hedge accounting generally provides for the matching of the timing of gain or loss recognition on the hedging instrument with the recognition of the changes in the fair value of the hedged asset or liability that are attributable to the hedged risk in a fair value hedge or the earnings effect of the hedged forecasted transactions in a cash flow hedge. During the term of a cash flow hedge contract the effective portion of changes in fair value in the derivative instrument are recorded in accumulated other comprehensive income. Changes in the fair value of derivatives to which hedge accounting does not apply are recognized immediately in earnings. 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 consolidated statement of income on a recurring basis. Cash Flow Hedges of Interest Rate Risk The Company is a party to an interest rate swap agreement under which the Company receives interest at a variable rate and pays at a fixed rate. The 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 of the swap agreement. 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 without 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. Some interest rate swaps included in other assets were 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 consolidated balance sheets, and any impact of netting these amounts would not be significant.
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets . Goodwill, which represents the excess of cost over the fair value of the net assets of an acquired business, is not amortized but tested for impairment on an annual basis, which is October 1 for the Company, or more often if events or circumstances indicate that there may be impairment. Other intangible assets, such as relationship based intangibles and core deposit intangibles, are amortized on a basis consistent with the receipt of economic benefit to us. Such assets are evaluated at least annually as to the recoverability of their carrying value for potential impairment. In the quarter following the period in which identified intangible assets become fully amortized, the fully amortized balances are removed from the gross asset and accumulated amortization amounts.
Other Real Estate Owned	Other Real Estate Owned . Other real estate owned ("OREO") represents properties acquired through foreclosure or acceptance of a deed in lieu of foreclosure on loans on which the borrowers have defaulted as to payment of principal and interest. OREO also includes bank-owned real estate which the Company is no longer utilizing and intends to sell. These properties are initially recorded at fair value, less cost to sell, at the date of foreclosure establishing a new cost basis. Fair value is determined based on third party appraisals. Any subsequent capital improvements that increase value are added to the balance of the properties. Any valuation adjustments required at the date of transfer from loans to OREO are charged to the allowance for loan losses. Any subsequent write-downs to reflect current fair value, or gains and losses on the sale of the properties are charged to noninterest income.
Overnight Repurchase Agreements with Depositors	Overnight Repurchase Agreements with Depositors . The Company enters into agreements under which it sells securities subject to an obligation to repurchase the same or similar securities. Under these arrangements, the Company may transfer legal control over the assets but still retain effective control through an agreement that both entitles and obligates it to repurchase the assets. Securities sold under agreements to repurchase generally mature on the banking day following that on which the investment was initially sold and are treated as collateralized financing transactions which are recorded at the amounts at which the securities were sold plus accrued interest. Interest rates and maturity dates of the securities involved vary and are not intended to be matched with funds from customers.
Mortgage Banking Revenue	Mortgage Banking Revenue . This revenue category primarily reflects the Company's mortgage production, sales and mortgage servicing revenue, including fees and income derived from mortgages originated with the intent to sell; mortgage sales and servicing; and the impact of risk management activities associated with the mortgage pipeline and mortgage servicing rights ("MSRs"). This revenue category also includes gains and losses on sales and changes in fair value for mortgage loans originated with the intent to sell and measured at fair value under the fair value option. Changes in the fair value of MSRs are reported in mortgage banking revenue. Net interest income from mortgage loans is recorded in interest income.
Income Taxes	Income Taxes . Income tax expense is the total of the current year income tax due or refundable and the change in deferred tax assets and liabilities. Deferred tax assets and liabilities are the expected future tax amounts for the temporary differences between carrying amounts and tax bases of assets and liabilities, computed using enacted tax rates. A valuation allowance, if needed, reduces deferred tax assets to the amount expected to be realized. A tax position is recognized as a benefit only if it is "more likely than not" that the tax position would be sustained in a tax examination, with a tax examination being presumed to occur. The amount recognized is the largest amount of tax benefit that is greater than 50% likely of being realized on examination. For tax positions not meeting the "more likely than not" test, no tax benefit is recorded. The Company did not have any amount accrued with respect to uncertainty in income taxes at December 31, 2018 or 2017. The Company recognizes interest and/or penalties related to income tax matters as a component of noninterest expense.
Stock-Based Compensation	Stock-Based Compensation . The cost of employee services received in exchange for stock options or restricted stock grants are measured using the fair value of the award on the grant date and is recognized over the service period. During 2016, the Company adopted the amendments outlined in ASU No. 2016-09 — Compensation — Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting . The adoption of the ASU did not have a significant impact on its consolidated financial statements or disclosures.
Other Investments	Other Investments . The Company accounts for investments in limited partnerships, limited liability companies ("LLCs"), and other privately held companies using either the equity method of accounting or at amortized cost net of impairments and observable price changes. The accounting treatment depends upon the Company's percentage ownership or degree of management influence. Under the equity method of accounting, the Company records its initial investment at cost. Subsequently, the carrying amount of the investment is increased or decreased to reflect its share of income or loss of the investee. The Company's recognition of earnings or losses from an equity method investment is based on its ownership percentage in the investee and the investee's earnings for the reporting period, and is recorded on a one-quarter lag. All of the Company's investments in limited partnerships, LLCs, and other companies are privately held, and their fair values are not readily available. Management evaluates the investments in investees for impairment based on the investee's ability to generate cash through its operations or obtain alternative financing, and other subjective factors. There are inherent risks associated with investments in such companies, which may result in volatility in the consolidated statements of income in future periods.
Investments in Tax Credit Entities	Investments in Tax Credit Entities . As part of its Community Reinvestment Act responsibilities and due to their favorable economic characteristics, the Company invests in tax credit-motivated projects primarily in the markets it serves. These projects are directed at tax credits issued under Low-Income Housing Tax Credits. The Company generates returns on tax credit motivated projects through the receipt of federal, and if applicable, state tax credits. The federal tax credits are recorded as an offset to the income tax provision in the year that they are earned under federal income tax law – over 10 to 15 years beginning in the year in which rental activity commences. These credits, if not used in the tax return for the year of origination, can be carried forward for 20 years. The Company invests in a tax credit entity, usually an LLC, which owns the real estate. The Company receives a nonvoting interest in the entity that must be retained during the compliance period for the credits ( 15 years for Low-Income Housing Tax Credit programs). Control of the tax credit entity rests in the 0.1% interest general partner, who has the power and authority to make decisions that impact economic performance of the project and is required to oversee and manage the project. Due to the lack of any voting, economic, or managerial control, and due to the contractual reduction in the investment, the Company accounts for its investment by amortizing the investment, beginning at the issuance of the certificate of occupancy of the project, over the compliance period, as management believes any potential residual value in the real estate will have limited value. Amortization is included as a component of income tax expense. The Company has the risk of credit recapture if the project does not maintain compliance during the compliance period. No such events have occurred to date.
Earnings Per Share	The Company has the risk of credit recapture if the project does not maintain compliance during the compliance period. No such events have occurred to date. At December 31, 2018, and 2017, the Company had investments in tax credit entities of $10.6 million and $12.5 million , respectively, which are included in other assets in the accompanying consolidated balance sheets. Earnings Per Share . Basic earnings per common share is calculated using the two-class method. The two-class method is an earnings allocation formula that determines earnings per share for each share of common stock and participating securities according to dividends declared (distributed earnings) and participation rights in undistributed earnings. Distributed and undistributed earnings are allocated between common and participating security stockholders based on their respective rights to receive dividends. Share-based payment awards that contain nonforfeitable rights to dividends or dividend equivalents are considered participating securities (e.g., restricted stock grants). Preferred stock that receives dividends based on dividends paid on common stock is also considered a participating security (e.g., Series D preferred stock). Undistributed net losses are not allocated to holders of participating securities, as they do not have a contractual obligation to fund the losses incurred by the Company. Net income attributable to common stockholders is then divided by the weighted average number of common shares outstanding during the period, net of participating securities and reduced for average unallocated shares held by the Company's Employee Retirement Plan ("Retirement Plan"). Diluted income per common share considers common stock issuable under the assumed release of unvested restricted stock awards, convertible preferred stock being converted to common stock, and the assumed exercise of stock options granted. The dilutive effect of share-based payment awards that are not deemed to be participating securities is calculated using the treasury stock method, which assumes that the proceeds from exercise are used to purchase common stock at the average market price for the period. The dilutive effect of participating securities is calculated using the more dilutive of the treasury stock method (which assumes that the participating securities are exercised/released) or the two-class method (which assumes that the participating securities are not exercised/released and earnings are reallocated between common and participating security stockholders). Potentially dilutive common stock equivalents are excluded from the computation of diluted earnings per common share in periods in which the effect would be antidilutive.
Effect of Recently Adopted Accounting Standards and Effect of 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 consolidated financial statements. This ASU requires an entity to present the earnings effect of the hedging instrument in the same line item in the statement of income 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 prospectively. 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 $844,000 and $3.6 million , of return of capital proceeds from limited partnership investments from operating activities to investing activities for the year ended December 31, 2017 and 2016, respectively. 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 AFS classification of accounting for equity securities and to adjust the fair value disclosures for financial instruments carried at amortized cost such that the disclosed fair values represent an exit price as opposed to an entry price. The 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 —Revenue from Contracts with Customers ( Topic 606 ). The Company adopted this ASU on January 1, 2018, 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 U.S. 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 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 insufficient 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 obligations 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. 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 file reports with the Securities and Exchange Commission ("SEC"), the amendments in the update are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, early adoption is permitted. The Company prospectively adopted ASU 2018-15 effective October 1, 2018. As a result of this implementation, capitalized costs relating to internal use software totaled $455,000 at December 31, 2018, and will be expensed over the useful life of the contract rather than expensed as incurred. The asset will be reflected on the consolidated balance sheets in accrued interest receivable and other assets and the related amortization expense will be reflected in data processing expense on the consolidated statements of income. Effect of Newly Issued But Not Yet Effective Accounting Standards 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 Financial Accounting Standards Board ("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 file reports with the SEC, 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 requires the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts and requires enhanced disclosures related to the significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of an organization's portfolio. In addition, ASU 2016-13 amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. The Company is currently evaluating the potential impact of ASU 2016-13 to the consolidated financial statements. In that regard, the Company has formed a working group comprised of individuals from various functional areas including credit, risk management, finance and information technology, among others. The Company is currently working through an implementation plan which includes assessment and documentation of processes, internal controls and data sources; model development and documentation; and system configuration. The Company is also in the process of implementing a third-party vendor solution to assist us in the application of the ASU 2016-13. The adoption of the ASU 2016-13 could result in an increase in the allowance for loan losses as a result of changing from an "incurred loss" model, which encompasses allowances for current known and inherent losses within the portfolio, to an "expected loss" model, which encompasses allowances for losses expected to be incurred over the life of the portfolio. Furthermore, ASU 2016-13 will necessitate the establishment of an allowance for expected credit losses for certain debt securities and other financial assets. While the Company is currently unable to reasonably estimate the impact of adopting ASU 2016-13, the impact of adoption is expected to be significantly influenced by the composition, characteristics and quality of the Company's loan and securities portfolios as well as the prevailing economic conditions and forecasts as of the adoption date. For public business entities that file reports with the SEC, the amendments in the update are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. 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 consolidated statements of income 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 will make use of this transition option guidance and has finalized the review of key assumptions. Based on its analysis, the Company expects the overall impact to the consolidated balance sheets reflected in the right-of-use asset and corresponding lease obligation liability will be approximately $26.0 million at adoption. The Company adopted this ASU as of January 1, 2019, and the cumulative effect adjustment to retained earnings upon adoption was immaterial. During the first quarter of 2018, the Company adopted ASU 2018-02. The ASU was issued by the 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 Nonaccrual 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. Troubled debt restructurings ("TDRs") are included in certain loan categories within impaired loans.
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 December 31, 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 December 31, 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 $42.1 million at December 31, 2018 , and are shown on the face of the consolidated balance sheets. 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 that do not have readily determinable fair values. Government National Mortgage Association Repurchase Asset The Company recorded $30.6 million and $32.6 million , respectively, at December 31, 2018 , and December 31, 2017 , for Government National Mortgage Association ("GNMA") repurchase assets included in mortgage loans held for sale on the consolidated balance sheets. 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 8 - 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 $1.4 million and $18.2 million at December 31, 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 that 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. 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 1, 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 Accounting Standards Codification ("ASC") 820, Fair Value Measurements and Disclosures , the Company periodically checks the fair value by comparing them to another pricing source, such as Bloomberg LP. The third-party pricing service is subject to an annual review of internal controls in accordance with the Statement on Standards for Attestation Engagements No. 16, which was 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 using a discounted cash flow valuation technique. 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 consolidated 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 that 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.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	(Dollars in thousands, except per share amounts) Years Ended December 31, Basic earnings per common share 2018 2017 2016 Net income $ 51,605 $ 14,669 $ 12,850 Less: Dividends to preferred stock (1) 1,923 4,461 4,398 Net income allocated to participating stockholders (1) (2) 1,029 377 316 Net income available to common stockholders (3) $ 48,653 $ 9,831 $ 8,136 Weighted average common shares outstanding (4) 21,995,990 19,418,278 17,545,655 Basic earnings per common share $ 2.21 $ 0.51 $ 0.46 Diluted earnings per common share Diluted earnings applicable to common stockholders (3) $ 48,819 $ 9,861 $ 8,136 Weighted average diluted common shares outstanding: Weighted average common shares outstanding (4) 21,995,990 19,418,278 17,545,655 Dilutive effect of common stock options 198,439 216,134 187,406 Weighted average diluted common shares outstanding 22,194,429 19,634,412 17,733,061 Diluted earnings per common share $ 2.20 $ 0.50 $ 0.46 ____________________________ (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 period prior to June 30, 2018, Series D preferred stockholders were participating stockholders as those shares participate 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 calculation of earnings per share for the year ended December 31, 2018, includes an allocation for Series D preferred stockholders, which were converted to common stock during the quarter ended June 30, 2018. (3) Net income available 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) Presentation for 2016 share and per share amounts has been adjusted to reflect a 2 -for-1 stock split that occurred on October 5, 2016.

Securities (Tables)

Securities (Tables)	12 Months Ended
	Dec. 31, 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) December 31, 2018 Amortized Gross Gross Unrealized Losses Fair Available for sale: State and municipal securities $ 99,780 $ 1,266 $ (163 ) $ 100,883 Corporate bonds 10,997 102 (65 ) 11,034 U.S. government and agency securities 61,122 82 (54 ) 61,150 Commercial mortgage-backed securities 16,672 94 — 16,766 Residential mortgage-backed securities 188,058 417 (2,160 ) 186,315 Residential collateralized mortgage obligations 202,422 315 (3,241 ) 199,496 Total $ 579,051 $ 2,276 $ (5,683 ) $ 575,644 Held to maturity: State and municipal securities $ 19,169 $ — $ (33 ) $ 19,136 Securities carried at fair value through income: State and municipal securities (1) $ 11,503 $ — $ — $ 11,361 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 5 - Fair Value of Financial Instruments for more information.
Schedule of Securities with Unrealized Loss	Securities with unrealized losses at December 31, 2018 , and December 31, 2017 , aggregated by investment category and those individual securities that have been in a continuous unrealized loss position for less than 12 months and for 12 months or more were as follows: (Dollars in thousands) Less than 12 Months 12 Months or More Total December 31, 2018 Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss Available for sale: State and municipal securities $ 13,101 $ (50 ) $ 8,463 $ (113 ) $ 21,564 $ (163 ) Corporate bonds 7,932 (65 ) — — 7,932 (65 ) U.S. government and agency securities 56,271 (54 ) — — 56,271 (54 ) Commercial mortgage-backed securities — — — — — — Residential mortgage-backed securities 18,836 (65 ) 77,471 (2,095 ) 96,307 (2,160 ) Residential collateralized mortgage obligations 14,711 (79 ) 120,601 (3,162 ) 135,312 (3,241 ) Total $ 110,851 $ (313 ) $ 206,535 $ (5,370 ) $ 317,386 $ (5,683 ) Held to maturity: State and municipal securities $ 13,921 $ (33 ) $ — $ — $ 13,921 $ (33 ) 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	Proceeds from sales of securities available for sale and gross gains for the years ended December 31, 2018, 2017 and 2016 are shown below. December 31, (Dollars in thousands) 2018 2017 2016 Proceeds from sales $ 20,877 $ — $ 7,136 Gross realized gains 381 — 136 Gross realized losses (389 ) — — Tax (benefit) expense related to securities gains/losses (2 ) — 48 The following table presents the amortized cost and fair value of securities available for sale and held to maturity at December 31, 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 December 31, 2018 Amortized Cost Fair Value Amortized Cost Fair Value Due in one year or less $ — $ — $ 58,681 $ 58,654 Due after one year through five years 13,954 13,921 25,175 25,422 Due after five years through ten years — — 81,253 82,144 Due after ten years 5,215 5,215 6,790 6,847 Commercial mortgage-backed securities — — 16,672 16,766 Residential mortgage-backed securities — — 188,058 186,315 Residential collateralized mortgage obligations — — 202,422 199,496 Total $ 19,169 $ 19,136 $ 579,051 $ 575,644
Proceeds from Sales of Securities Available for Sale and Gross Gains	Proceeds from sales of securities available for sale and gross gains for the years ended December 31, 2018, 2017 and 2016 are shown below. December 31, (Dollars in thousands) 2018 2017 2016 Proceeds from sales $ 20,877 $ — $ 7,136 Gross realized gains 381 — 136 Gross realized losses (389 ) — — Tax (benefit) expense related to securities gains/losses (2 ) — 48
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. December 31, (Dollars in thousands) 2018 2017 Carrying value of securities pledged to secure public deposits $ 364,055 $ 276,319 Carrying value of securities pledged to repurchase agreements 48,847 36,685

Loans (Tables)

Loans (Tables)	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
Schedule of Loans	Loans consist of the following: December 31, (Dollars in thousands) 2018 2017 Loans held for sale $ 52,210 $ 65,343 Loans held for investment: Loans secured by real estate: Commercial real estate $ 1,228,402 $ 1,083,275 Construction/land/land development 429,660 322,404 Residential real estate 629,714 570,583 Total real estate 2,287,776 1,976,262 Commercial and industrial 1,272,566 989,220 Mortgage warehouse lines of credit 207,871 255,044 Consumer 20,892 20,505 Total loans held for investment (1) 3,789,105 3,241,031 Less: Allowance for loan losses 34,203 37,083 Net loans held for investment $ 3,754,902 $ 3,203,948 ____________________________ (1) Includes net deferred loan fees of $3.2 million and $1.0 million at December 31, 2018 , and December 31, 2017 , respectively.
Recorded Investment in Loans by Credit Quality Indicator	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 under 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 under 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 under 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 December 31, 2018 , and December 31, 2017 , excluding loans held for sale, were as follows: (Dollars in thousands) December 31, 2018 Loans secured by real estate: Pass Special Mention Substandard Doubtful Loss Total Commercial real estate $ 1,206,194 $ 3,101 $ 19,107 $ — $ — $ 1,228,402 Construction/land/land development 426,770 157 2,733 — — 429,660 Residential real estate 617,996 1,142 10,576 — — 629,714 Total real estate 2,250,960 4,400 32,416 — — 2,287,776 Commercial and industrial 1,190,718 34,964 46,884 — — 1,272,566 Mortgage warehouse lines of credit 207,871 — — — — 207,871 Consumer 20,712 — 180 — — 20,892 Total loans held for investment $ 3,670,261 $ 39,364 $ 79,480 $ — $ — $ 3,789,105 (Dollars in thousands) December 31, 2017 Loans secured by real estate: Pass Special Mention Substandard Doubtful Loss Total 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
Loan Portfolio Aging Analysis	The following tables present the Company's loan portfolio aging analysis at the dates indicated: (Dollars in thousands) December 31, 2018 Loans secured by real estate: 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 Commercial real estate $ 458 $ 1,409 $ 7,224 $ 9,091 $ 1,219,311 $ 1,228,402 $ — Construction/land/land development 2,657 — 435 3,092 426,568 429,660 — Residential real estate 2,137 527 4,149 6,813 622,901 629,714 — Total real estate 5,252 1,936 11,808 18,996 2,268,780 2,287,776 — Commercial and industrial 276 8,263 6,157 14,696 1,257,870 1,272,566 — Mortgage warehouse lines of credit — — — — 207,871 207,871 — Consumer 383 8 2 393 20,499 20,892 — Total loans held for investment $ 5,911 $ 10,207 $ 17,967 $ 34,085 $ 3,755,020 $ 3,789,105 $ — (Dollars in thousands) December 31, 2017 Loans secured by real estate: 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 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. (Dollars in thousands) Year Ended December 31, 2018 Loans secured by real estate: Beginning Balance Charge-offs Recoveries Provision (Benefit) (1) Ending Balance Commercial real estate $ 8,998 $ 1,300 $ 226 $ 1,075 $ 8,999 Construction/land/land development 2,950 228 6 603 3,331 Residential real estate 5,807 407 133 172 5,705 Commercial and industrial 18,831 5,068 2,206 (353 ) 15,616 Mortgage warehouse lines of credit 214 — — 102 316 Consumer 283 121 92 (18 ) 236 Total $ 37,083 $ 7,124 $ 2,663 $ 1,581 $ 34,203 ____________________________ (1) The $1.0 million provision for credit losses on the consolidated statements of income includes a $1.6 million net loan loss provision and a $567,000 release of provision for off-balance sheet commitments for the year ended December 31, 2018 . (Dollars in thousands) Year Ended December 31, 2017 Loans secured by real estate: Beginning Balance Charge-offs Recoveries Provision (1) Ending Balance Commercial real estate $ 8,718 $ 463 $ 93 $ 650 $ 8,998 Construction/land/land development 2,805 3 5 143 2,950 Residential real estate 5,003 1,446 125 2,125 5,807 Commercial and industrial 33,590 21,767 1,918 5,090 18,831 Mortgage warehouse lines of credit 139 — — 75 214 Consumer 276 198 69 136 283 Total $ 50,531 $ 23,877 $ 2,210 $ 8,219 $ 37,083 ____________________________ (1) The $8.3 million provision for credit losses on the consolidated statements of income includes a $8.2 million net loan loss provision and an $117,000 provision for off-balance sheet commitments for the year ended December 31, 2017 . (Dollars in thousands) Year Ended December 31, 2016 Loans secured by real estate: Beginning Balance Charge-offs Recoveries Provision (Benefit) (1) Ending Balance Commercial real estate $ 7,451 $ 422 $ 25 $ 1,664 $ 8,718 Construction/land/land development 3,927 24 7 (1,105 ) 2,805 Residential real estate 5,094 505 185 229 5,003 Commercial and industrial 23,648 24,851 4,199 30,594 33,590 Mortgage warehouse lines of credit 761 — — (622 ) 139 Consumer 349 604 126 405 276 Total $ 41,230 $ 26,406 $ 4,542 $ 31,165 $ 50,531 ____________________________ (1) The $30.1 million provision for credit losses on the consolidated statements of income includes a $31.2 million loan loss provision offset by a $1.1 million release of provision for off-balance sheet commitments for the year ended December 31, 2016.
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: (Dollars in thousands) December 31, 2018 Loans secured by real estate: 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) Commercial real estate $ 5 $ 8,994 $ 8,773 $ 1,201,058 Construction/land/land development 19 3,312 1,017 428,643 Residential real estate 68 5,637 6,876 622,838 Commercial and industrial 255 15,361 16,428 1,256,138 Mortgage warehouse lines of credit — 316 — 207,871 Consumer 19 217 184 20,708 Total $ 366 $ 33,837 $ 33,278 $ 3,737,256 ____________________________ (1) Excludes $18.6 million of commercial real estate loans at fair value, which are not evaluated for impairment due to the fair value option election. See Note 5 - Fair Value of Financial Instruments for more information. (Dollars in thousands) December 31, 2017 Loans secured by real estate: 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) 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 5 - 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 December 31, 2018 , or December 31, 2017 . (Dollars in thousands) December 31, 2018 Loans secured by real estate: Unpaid Contractual Principal Balance Recorded Investment with no Allowance Recorded Investment with an Allowance Total Recorded Investment Allocation of Allowance for Loan Losses Commercial real estate $ 10,894 $ 8,725 $ 48 $ 8,773 $ 5 Construction/land/land development 1,329 838 179 1,017 19 Residential real estate 7,815 6,092 784 6,876 68 Total real estate 20,038 15,655 1,011 16,666 92 Commercial and industrial 18,883 15,806 622 16,428 255 Consumer 202 — 184 184 19 Total impaired loans $ 39,123 $ 31,461 $ 1,817 $ 33,278 $ 366 (Dollars in thousands) December 31, 2017 Loans secured by real estate: Unpaid Contractual Principal Balance Recorded Investment with no Allowance Recorded Investment with an Allowance Total Recorded Investment Allocation of Allowance for Loan Losses 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 income recognized on impaired loans while classified as impaired for the years ended December 31, 2018 , 2017 and 2016, were as follows: Years Ended December 31, (Dollars in thousands) 2018 2017 2016 Loans secured by real estate: Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized Average Recorded Investment Interest Income Recognized Commercial real estate $ 9,901 $ 67 $ 7,046 $ 165 $ 7,179 $ 273 Construction/land/land development 1,401 16 1,053 10 1,179 55 Residential real estate 7,529 60 9,398 75 11,065 385 Total real estate 18,831 143 17,497 250 19,423 713 Commercial and industrial 14,814 199 40,316 375 94,940 3,139 Consumer 251 5 244 7 308 18 Total impaired loans $ 33,896 $ 347 $ 58,057 $ 632 $ 114,671 $ 3,870
Non-performing (Nonaccrual) Loans Held for Investment	Non-performing (nonaccrual) loans held for investment were as follows: (Dollars in thousands) December 31, Loans secured by real estate: 2018 2017 Commercial real estate $ 8,281 $ 1,745 Construction/land/land development 935 1,097 Residential real estate 6,668 7,166 Total real estate 15,884 10,008 Commercial and industrial 15,792 13,512 Consumer 180 282 Total nonaccrual loans $ 31,856 $ 23,802
Loans Classified as Troubled Debt Restructurings (TDRs)	The following is a summary of loans classified as TDRs. (Dollars in thousands) December 31, TDRs 2018 2017 Nonaccrual TDRs $ 5,793 $ 2,622 Performing TDRs 2,054 14,234 Total $ 7,847 $ 16,856 The following tables present the pre-modification balance of TDR modifications that occurred during the periods indicated and the ending balances by concession type as of each period presented. (Dollars in thousands) Year Ended December 31, 2018 Loans secured by real estate: Number of Loans Restructured Pre-Modification Recorded Balance Term Concessions Interest Rate Concessions Combination Total Modifications Commercial real estate 1 $ 252 $ 150 $ — $ — $ 150 Residential real estate 6 428 48 19 331 398 Total real estate 7 680 198 19 331 548 Commercial and industrial 3 198 180 — 14 194 Consumer 1 33 — — 29 29 Total 11 $ 911 $ 378 $ 19 $ 374 $ 771 (Dollars in thousands) Year Ended December 31, 2017 Loans secured by real estate: Number of Loans Restructured Pre-Modification Recorded Balance Term Concessions Interest Rate Concessions Combination Total Modifications Commercial real estate 4 $ 2,071 $ 2,057 $ — $ — $ 2,057 Residential real estate 3 133 38 — 210 248 Total real estate 7 2,204 2,095 — 210 2,305 Commercial and industrial 8 10,799 9,882 — 40 9,922 Consumer 1 49 45 — — 45 Total 16 $ 13,052 $ 12,022 $ — $ 250 $ 12,272 (Dollars in thousands) Year Ended December 31, 2016 Loans secured by real estate: Number of Loans Restructured Pre-Modification Recorded Balance Term Concessions Interest Rate Concessions Combination Total Modifications Commercial real estate 2 $ 398 $ 94 $ — $ 206 $ 300 Residential real estate 6 129 — — 96 96 Total real estate 8 527 94 — 302 396 Commercial and industrial 10 19,536 9,331 11 7 9,349 Consumer 1 22 21 — — 21 Total 19 $ 20,085 $ 9,446 $ 11 $ 309 $ 9,766

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 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 December 31, 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 2018 or 2017. December 31, 2018 (Dollars in thousands) Level 1 Level 2 Level 3 Total State and municipal securities $ — $ 61,522 $ 39,361 $ 100,883 Corporate bonds — 11,034 — 11,034 U.S. treasury securities 55,515 — — 55,515 U.S. government agency securities — 5,635 — 5,635 Commercial mortgage-backed securities — 16,766 — 16,766 Residential mortgage-backed securities — 186,315 — 186,315 Residential collateralized mortgage obligations — 199,496 — 199,496 Securities available for sale 55,515 480,768 39,361 575,644 Securities carried at fair value through income — — 11,361 11,361 Loans held for sale — 21,562 — 21,562 Loans at fair value — — 18,571 18,571 Mortgage servicing rights — — 25,114 25,114 Other assets - derivatives — 3,563 — 3,563 Total recurring fair value measurements - assets $ 55,515 $ 505,893 $ 94,407 $ 655,815 Other liabilities - derivatives $ — $ (2,846 ) $ — $ (2,846 ) Total recurring fair value measurements - liabilities $ — $ (2,846 ) $ — $ (2,846 ) 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 years ended December 31, 2018 , and 2017 , are summarized as follows: (Dollars in thousands) Loans at Fair Value MSRs Securities Available for Sale Securities at Fair Value Through Income Balance at January 1, 2018 $ 26,611 $ 24,182 $ 42,015 $ 12,033 Gain (loss) recognized in earnings: Mortgage banking revenue (1) — (963 ) — — Other noninterest income (389 ) — — (258 ) Gain (loss) recognized in AOCI — — (597 ) — Purchases, issuances, sales and settlements: Originations — 1,895 — — Purchases — — 259 — Settlements (7,651 ) — (2,316 ) (414 ) Balance at December 31, 2018 $ 18,571 $ 25,114 $ 39,361 $ 11,361 Balance at January 1, 2017 $ 33,693 $ 29,385 $ 43,858 $ 12,511 Losses recognized in earnings: Mortgage banking revenue (1) — (6,014 ) — — Other noninterest income (712 ) — — (97 ) Gain recognized in AOCI — — 425 — Purchases, issuances, sales, and settlements: Purchases — 3,061 275 — Sales (2,516 ) (2,250 ) — — Settlements (3,854 ) — (2,543 ) (381 ) Balance at December 31, 2017 $ 26,611 $ 24,182 $ 42,015 $ 12,033 ____________________________ (1) Mortgage banking revenue includes changes in fair value due to market changes and run-off.
Significant Assumptions Used to Value Mortgage Servicing Rights	The significant assumptions used to value MSRs were as follows: December 31, 2018 2017 Prepayment speed 9.90 % 10.80 % Discount rate 10.42 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: December 31, 2018 (Dollars in thousands) Aggregate Fair Value Aggregate Unpaid Principal Balance Difference Loans held for sale (1) $ 21,562 $ 21,173 $ 389 Commercial real estate loans held for investment (2) 18,571 18,391 180 Securities carried at fair value through income 11,361 11,503 (142 ) Total $ 51,494 $ 51,067 $ 427 ____________________________ (1) A total of $ 741,000 of loans held for sale were designated as nonaccrual or 90 days or more past due at December 31, 2018 . Of this balance, the Company had guarantees receivable from U.S. Government agencies totaling $ 582,000 . (2) There were no commercial real estate loans for which the fair value had been elected that were designated as nonaccrual or 90 days or more past due at December 31, 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) A total of $2.4 million of loans were 90 days or more past due 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 90 days or more past due at December 31, 2017 . Changes in the fair value of assets for which the Company elected the fair value option are classified in the consolidated statement of income line items reflected in the following table: (Dollars in thousands) Years Ended December 31, Changes in fair value included in noninterest income: 2018 2017 2016 Mortgage banking revenue $ (163 ) $ 477 $ (594 ) Other income: Loans at fair value held for investment (389 ) (712 ) (522 ) Securities carried at fair value through income (258 ) (97 ) (140 ) Total impact on other income (647 ) (809 ) (662 ) Total fair value option impact on noninterest income (1) $ (810 ) $ (332 ) $ (1,256 ) ____________________________ (1) The fair value option impact on noninterest income is offset by the derivative gain/loss recognized in noninterest income. Please see Note 8 - 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) December 31, Financial assets: 2018 2017 Level 1 inputs: Carrying Estimated Carrying Value Estimated Fair Value Cash and cash equivalents $ 116,678 $ 116,678 $ 187,187 $ 187,187 Level 2 inputs: Securities held to maturity 19,169 19,136 20,188 20,265 Non-marketable equity securities held in other financial institutions 42,149 42,149 22,967 22,967 Accrued interest and loan fees receivable 16,454 16,454 10,719 10,719 Level 3 inputs: Loans held for investment, net (1) 3,736,331 3,605,142 3,177,337 3,238,872 Financial liabilities: Level 2 inputs: Deposits 3,783,138 3,537,283 3,512,014 3,352,213 FHLB advances and other borrowings 445,224 444,286 144,357 145,330 Junior subordinated debentures 9,644 10,723 9,619 14,132 Accrued interest payable 2,679 2,679 2,424 2,424 ____________________________ (1) Loans held for investment, net does not include loans for which the fair value option had been elected at December 31, 2018 , or December 31, 2017 , as these loans are carried at fair value on a recurring basis.

Premises, Equipment and Lease_2

Premises, Equipment and Lease Commitments (Tables)	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Major Classifications of Premises and Equipment	Major classifications of premises and equipment are summarized below: December 31, (Dollars in thousands) 2018 2017 Land, buildings and improvements $ 82,114 $ 84,468 Furniture, fixtures and equipment 24,946 25,349 Leasehold improvements 11,345 9,673 Construction in process 1,715 296 120,120 119,786 Accumulated depreciation (45,106 ) (42,378 ) Total $ 75,014 $ 77,408
Schedule of Capital Leases	The following schedule presents the Company's capital leases: December 31, (Dollars in thousands) 2018 2017 Gross book value $ 1,665 $ 1,665 Accumulated amortization (included as a component of accumulated depreciation) (1,204 ) (963 ) Net book value $ 461 $ 702 Capital lease obligations $ 508 $ 758
Minimum Future Lease Obligations for Capital Leases	Minimum future lease obligations for capital and operating leases at December 31, 2018 , were as follows: (Dollars in thousands) Year ended December 31, Capital Leases Operating Leases 2019 $ 276 $ 4,392 2020 253 4,113 2021 — 3,775 2022 — 3,537 2023 — 3,109 Thereafter — 10,690 Total 529 29,616 Less amounts representing interest 21 — Total lease obligations $ 508 $ 29,616
Minimum Future Lease Obligations for Operating Leases	Minimum future lease obligations for capital and operating leases at December 31, 2018 , were as follows: (Dollars in thousands) Year ended December 31, Capital Leases Operating Leases 2019 $ 276 $ 4,392 2020 253 4,113 2021 — 3,775 2022 — 3,537 2023 — 3,109 Thereafter — 10,690 Total 529 29,616 Less amounts representing interest 21 — Total lease obligations $ 508 $ 29,616

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Components of Goodwill and Other Intangible Assets	The components of the Company's goodwill and other intangible assets are as follows: (Dollars in thousands) December 31, 2018 Weighted Avg. Remaining Useful Life (Yrs.) Gross Accumulated Amortization Net Goodwill — $ 26,741 $ — $ 26,741 Other intangible assets: Core deposit intangibles 1.8 1,260 (945 ) 315 Relationship based intangibles 9.4 7,304 (1,819 ) 5,485 Tradename 2.3 186 (46 ) 140 Non-compete 1.3 270 (90 ) 180 Total $ 35,761 $ (2,900 ) $ 32,861 December 31, 2017 Goodwill — $ 22,192 $ — $ 22,192 Other intangible assets: Core deposit intangibles 2.8 1,260 (754 ) 506 Relationship based intangibles 8.1 3,996 (2,358 ) 1,638 Total $ 27,448 $ (3,112 ) $ 24,336
Estimated Future Amortization Expense for Intangible Assets	Estimated future amortization expense for intangible assets remaining at December 31, 2018 , was as follows: (Dollars in thousands) Years Ended December 31, 2019 $ 1,322 2020 1,060 2021 844 2022 689 2023 582 Thereafter 1,623 Total $ 6,120

Mortgage Banking (Tables)

Mortgage Banking (Tables)	12 Months Ended
	Dec. 31, 2018
Mortgage Banking [Abstract]
Mortgage Banking Operations	The following table presents the Company's revenue from mortgage banking operations: (Dollars in thousands) Years Ended December 31, Mortgage banking revenue 2018 2017 2016 Origination $ 854 $ 1,281 $ 1,312 Gain on sale of loans held for sale 6,403 11,615 12,546 Servicing 7,081 7,872 8,146 Total gross mortgage revenue 14,338 20,768 22,004 Mortgage derivatives gain (loss) (725 ) (205 ) (24 ) MSR change due to payoffs and paydowns (3,618 ) (4,005 ) (4,425 ) MSR and hedge fair value adjustment (400 ) (249 ) (2,686 ) Gain (loss) on MSR sale (1) 25 (503 ) — Mortgage banking revenue $ 9,620 $ 15,806 $ 14,869 ____________________________ (1) Amount shown during the year ended December 31, 2018, reflects final settlement on a loan servicing portfolio sold during the year ended December 31, 2017.
Schedule of Activity in Mortgages Servicing Rights (MSRs)	Activity in MSRs was as follows: Years Ended December 31, (Dollars in thousands) 2018 2017 2016 Balance at beginning of period $ 24,182 $ 29,385 $ 31,522 Origination of servicing rights 1,895 3,061 4,230 Change in fair value, including amortization, net (963 ) (6,014 ) (6,367 ) Sale of servicing rights — (2,250 ) — Balance at end of period $ 25,114 $ 24,182 $ 29,385

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2018
Banking and Thrift [Abstract]
Summary of Deposit Balances	Deposit balances are summarized as follows: December 31, (Dollars in thousands) 2018 2017 Noninterest-bearing demand $ 951,015 $ 832,853 Interest bearing demand 738,725 738,967 Money market 815,997 900,039 Brokered (1) 332,341 276,214 Savings 148,508 144,848 Time deposits (1) 796,552 619,093 Total Deposits $ 3,783,138 $ 3,512,014 ____________________________ (1) Brokered time deposits of $7.9 million are included in the brokered category for December 31, 2018.
Maturities of Time Deposits	Maturities of time deposits, including any brokered time deposits at December 31, 2018, are as follows: (Dollars in thousands) Year Ended December 31, 2019 $ 472,750 2020 235,714 2021 45,388 2022 30,648 2023 19,903 Total $ 804,403

Borrowings (Tables)

Borrowings (Tables)	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Summary of Borrowed Funds	Borrowed funds are summarized as follows: December 31, (Dollars in thousands) 2018 2017 Overnight repurchase agreements with depositors $ 40,314 $ 36,178 Short-term FHLB advances (1) 100,000 — GNMA repurchase liability 30,649 32,575 Long-term FHLB advances (2) 274,261 75,604 Total FHLB advances and other borrowings $ 445,224 $ 144,357 Junior subordinated debentures, net $ 9,644 $ 9,619 __________________________ (1) Short-term FHLB advances carried a fixed interest rate of 2.7% and matured on January 2, 2019. (2) Includes an FHLB advance of $250.0 million at December 31, 2018, which has a final maturity in 2033 that may be callable quarterly at the option of the FHLB beginning in the third quarter of 2019.
Schedule of Maturities of Long-term Advances	Scheduled maturities of long-term advances from the FHLB at December 31, 2018 , are as follows: (Dollars in thousands) Years Ended December 31, 2019 $ 828 2020 1,099 2021 1,142 2022 2,551 2023 4,451 Thereafter (1) 264,190 Total $ 274,261 __________________________ (1) Includes an FHLB advance of $250.0 million at December 31, 2018, which has a final maturity in 2033 that may be callable quarterly at the option of the FHLB beginning in the third quarter of 2019.
Summary of Terms of Current Debentures	The following table is a summary of the terms of the current debentures at December 31, 2018 : (Dollars in thousands) Issuance Trust Issuance Date Maturity Date Amount Outstanding Rate Type Current Rate Maximum Rate CTB Statutory Trust I 07/2001 07/2031 $ 6,702 Variable (1) 5.83 % 12.50 % First Louisiana Statutory Trust I 09/2006 12/2036 4,124 Variable (2) 4.59 16.00 $ 10,826 ____________________________ (1) The trust preferred securities reprice quarterly based on the three-month LIBOR plus 3.30% , with the last reprice date on October 29, 2018. (2) The trust preferred securities reprice quarterly based on the three-month LIBOR plus 1.80% , with the last reprice date on December 13, 2018.

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 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 December 31, 2018 , 2017 and 2016 , as well as the effect of these derivative instruments on the Company's consolidated statements of income for the years ended December 31, 2018 and 2017 : Notional Amounts (1) Fair Values (Dollars in thousands) December 31, December 31, Derivatives designated as cash flow hedging instruments: 2018 2017 2018 2017 Interest rate swaps included in other assets $ 10,500 $ 10,500 $ 152 $ 41 Derivatives not designated as hedging instruments: Interest rate swaps included in other assets $ 127,512 $ 132,959 $ 2,302 $ 2,314 Interest rate swaps included in other liabilities 145,857 159,479 (2,625 ) (3,221 ) Forward commitments to purchase mortgage-backed securities included in other assets (liabilities) 140,000 160,000 709 (50 ) Forward commitments to sell residential mortgage loans included in other liabilities 24,750 57,400 (221 ) (49 ) Interest rate-lock commitments on residential mortgage loans included in other assets 16,244 37,072 400 791 $ 454,363 $ 546,910 $ 565 $ (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 December 31, 2018 and 2017, were as follows: Weighted-Average Interest Rate December 31, 2018 2017 Interest rate swaps: Paid Received Paid Received Cash flow hedges 4.81 % 5.36 % 4.81 % 4.19 % Non-hedging interest rate swaps - financial institution counterparties 5.02 4.67 4.81 3.45 Non-hedging interest rate swaps - customer counterparties 4.73 5.05 3.54 4.89
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) Years Ended December 31, Derivatives not designated as hedging instruments: 2018 2017 2016 Amount of loss recognized in mortgage banking revenue (1) $ (2,450 ) $ (259 ) $ (2,570 ) Amount of gain recognized in other non-interest income 584 707 842 ____________________________ (1) Gains and losses on these instruments are largely offset by market fluctuations in mortgage servicing rights. See Note 8 - Mortgage Banking for more information on components of mortgage banking revenue.

Stock and Incentive Compensat_2

Stock and Incentive Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 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 years ended December 31, 2018 , 2017 and 2016 is presented below: Years Ended December 31, (Dollars in thousands) 2018 2017 2016 Restricted stock $ 1,462 $ 1,180 $ 1,082 Stock options (1) — (30 ) 465 Total stock compensation expense $ 1,462 $ 1,150 $ 1,547 Related tax benefits recognized in net income $ 307 $ 403 $ 541 ____________________________ (1) Stock option expense for the year ended December 31, 2017 , included expense reversal related to 16,638 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: Years Ended December 31, 2018 2017 2016 Shares Weighted Average Grant-Date Fair Value Shares Weighted Average Grant-Date Fair Value Shares Weighted Average Grant-Date Fair Value Nonvested shares, January 1, 61,293 $ 24.61 84,019 $ 24.22 102,012 $ 24.56 Granted 151,324 37.51 35,913 25.14 31,477 23.19 Vested (36,209 ) 27.70 (55,003 ) 24.39 (43,770 ) 24.19 Forfeited (2,001 ) 37.47 (3,636 ) 24.12 (5,700 ) 24.69 Nonvested shares, December 31, 174,407 $ 35.01 61,293 $ 24.61 84,019 $ 24.22
Stock Option Activity	The table below summarizes the status of the Company's stock options and changes during the years ended December 31, 2018 , 2017 and 2016. (Dollars in thousands, except per share amounts) Number of Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term (in years) Aggregate Intrinsic Value (1) Year Ended December 31, 2016 Outstanding at January 1, 2016 531,922 $ 11.69 6.39 $ 7,322 Exercised (169,000 ) 12.34 — 1,633 Expired (4,284 ) 12.29 — — Outstanding at December 31, 2016 358,638 11.37 7.79 3,844 Exercised (22,500 ) 12.29 — 304 Forfeited and expired (16,638 ) 23.89 — — Outstanding at December 31, 2017 319,500 10.65 7.07 4,840 Exercised (45,500 ) 12.29 — — Outstanding at December 31, 2018 274,000 $ 10.38 6.75 $ 6,493 Exercisable at December 31, 2018 274,000 $ 10.38 6.75 $ 6,493 ____________________________ (1) The intrinsic value for stock options for periods at or prior to December 31, 2017, is calculated based on the difference between the weighted average exercise price of the underlying awards and the weighted average market price of the Company's common stock calculated over thirty days immediately prior to the last day of the Company's fiscal year.

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Schedule of Provision for Income Taxes	The provision for income taxes is as follows: (Dollars in thousands) Years Ended December 31, Federal income taxes: 2018 2017 2016 Current $ 4,562 $ 715 $ 1,321 Deferred 5,658 4,644 1,532 State income taxes: Current 638 167 195 Deferred (21 ) 287 (132 ) Income tax expense (benefit) $ 10,837 $ 5,813 $ 2,916
Reconciliation of Income Tax Expense	A reconciliation of income tax expense at the statutory rate to the Company's actual income tax expense is below: Years Ended December 31, 2018 2017 2016 (Dollars in thousands) Amount % Amount % Amount % Income taxes computed at statutory rate $ 13,113 21.00 % $ 7,169 35.00 % $ 5,518 35.00 % Tax exempt revenue, net of nondeductible interest (907 ) (1.45 ) (1,629 ) (7.95 ) (1,717 ) (10.89 ) Low-income housing tax credits, net of amortization (691 ) (1.11 ) (624 ) (3.05 ) (936 ) (5.94 ) Other tax credits, net of add-backs (1,218 ) (1.95 ) (1,002 ) (4.89 ) (1,002 ) (6.36 ) Bank-owned life insurance income (150 ) (0.24 ) (221 ) (1.08 ) (248 ) (1.57 ) State income taxes, net of federal benefit 469 0.75 186 0.91 40 0.26 Stock-based compensation (252 ) (0.40 ) (80 ) (0.39 ) (461 ) (2.92 ) Deferred tax asset and income tax receivable true-up — — — — 2,468 15.65 Return to provision adjustment (67 ) (0.11 ) (241 ) (1.17 ) (1,026 ) (6.51 ) Deferred tax write-down for enacted tax rate changes 231 0.37 1,972 9.63 — — Other 309 0.49 283 1.37 280 1.78 Total income tax expense $ 10,837 17.35 % $ 5,813 28.38 % $ 2,916 18.50 %
Significant Components of Deferred Tax Assets and Liabilities	Significant components of deferred tax assets and liabilities are as follows: (Dollars in thousands) December 31, Deferred tax assets: 2018 2017 Credit loss allowances $ 7,762 $ 8,535 Deferred compensation and share-based compensation 2,471 2,286 Net operating loss carryforwards 1,238 1,241 Credit carryforwards — 5,968 Other 1,068 454 Gross deferred tax assets 12,539 18,484 Valuation allowance (867 ) (797 ) Deferred tax assets net of valuation allowance $ 11,672 $ 17,687 Deferred tax liabilities: Available for sale securities mark to market $ 440 $ 879 Basis difference in premises and equipment 1,655 2,082 Intangible assets 218 338 Mortgage servicing rights 5,426 5,225 Other 125 137 Gross deferred tax liabilities 7,864 8,661 Net deferred tax asset $ 3,808 $ 9,026

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income	Accumulated other comprehensive income ("AOCI") includes the after-tax change in unrealized gains and losses on AFS securities and cash flow hedging activities. (Dollars in thousands) Unrealized Gains (Losses) on AFS Securities Unrealized Gains (Losses) on Cash Flow Hedges Accumulated Other Comprehensive Income Balance at January 1, 2016 $ 5,289 $ (105 ) $ 5,184 Net change (1,784 ) 63 (1,721 ) Balance at January 1, 2017 3,505 (42 ) 3,463 Net change (2,225 ) 69 (2,156 ) Balance at January 1, 2018 1,280 27 1,307 Net change (4,157 ) 88 (4,069 ) Reclassification of tax effects related to the adoption of ASU 2018-02 (1) : Current (293 ) 17 (276 ) Deferred 569 (11 ) 558 Balance at December 31, 2018 $ (2,601 ) $ 121 $ (2,480 ) ____________________________ (1) During the first quarter of 2018, the Company adopted ASU 2018-02. The ASU was issued by the 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)	12 Months Ended
	Dec. 31, 2018
Banking and Thrift [Abstract]
Actual Capital Amounts and Ratios	The actual capital amounts and ratios of the Company and Bank at December 31, 2018 , and December 31, 2017 , are presented in the following table: (Dollars in thousands) December 31, 2018 Actual Minimum Capital Required - Basel III Fully Phased-In To be Well Capitalized Under Prompt Corrective Action Provisions Common Equity Tier 1 Capital to Risk-Weighted Assets Amount Ratio Amount Ratio Amount Ratio Origin Bancorp, Inc. $ 519,468 11.94 % $ 304,431 7.00 % N/A N/A Origin Bank 508,826 11.73 303,621 7.00 $ 281,934 6.50 % Tier 1 Capital to Risk-Weighted Assets Origin Bancorp, Inc. 528,786 12.16 369,668 8.50 N/A N/A Origin Bank 508,826 11.73 368,683 8.50 346,996 8.00 Total Capital to Risk-Weighted Assets Origin Bancorp, Inc. 564,437 12.98 456,647 10.50 N/A N/A Origin Bank 544,477 12.55 455,430 10.50 433,743 10.00 Leverage Ratio Origin Bancorp, Inc. 528,786 11.21 188,711 4.00 N/A N/A Origin Bank 508,826 10.81 188,229 4.00 235,287 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)	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Off-Balance Sheet Financial Instruments	These off-balance sheet financial instruments are summarized below: December 31, (Dollars in thousands) 2018 2017 Commitments to extend credit $ 1,178,735 $ 1,068,088 Standby letters of credit 46,860 79,893

Related Party Transactions (Tab

Related Party Transactions (Tables)	12 Months Ended
	Dec. 31, 2018
Related Party Transactions [Abstract]
Loans to Executive Officers, Directors, and Their Affiliates	Loans to executive officers, directors, and their affiliates at December 31, 2018 and 2017 were as follows: (Dollars in thousands) 2018 2017 Balance, beginning of year $ 9,934 $ 11,754 Advances 1,775 4,354 Principal repayments (1,845 ) (6,174 ) Effect of changes in composition of related parties (8,536 ) — Balance, end of year $ 1,328 $ 9,934 Commitments to extend credit $ 3,420 $ 12,355

Condensed Parent Company Only_2

Condensed Parent Company Only Financial Statements (Tables)	12 Months Ended
	Dec. 31, 2018
Condensed Financial Information Disclosure [Abstract]
Condensed Balance Sheets	Financial statements of Origin Bancorp, Inc. (parent company only) are as follows: (Dollars in thousands) December 31, Condensed Balance Sheets 2018 2017 Assets Cash and cash equivalents $ 5,882 $ 10,566 Investment in affiliates/subsidiaries 543,515 450,598 Other assets 10,393 5,500 Total assets $ 559,790 $ 466,664 Liabilities and Stockholders' Equity Junior subordinated debentures $ 9,644 $ 9,619 Accrued expenses and other liabilities 367 1,703 Total liabilities 10,011 11,322 Retirement Plan-owned (formerly ESOP) shares — 34,991 Stockholders' Equity Preferred stock — 65,258 Common stock 118,633 97,594 Additional paid‑in capital 242,041 146,061 Retained earnings 191,585 145,122 Accumulated other comprehensive income (2,480 ) 1,307 Total stockholders' equity 549,779 455,342 Less: Retirement Plan-owned (formerly ESOP) shares — 34,991 Total stockholders' equity 549,779 420,351 Total liabilities and stockholders' equity $ 559,790 $ 466,664
Condensed Statements of Income	Financial statements of Origin Bancorp, Inc. (parent company only) are as follows: (Dollars in thousands) Years Ended December 31, Condensed Statements of Income 2018 2017 2016 Income: Dividends from subsidiaries $ 4,500 $ 8,000 $ 5,625 Other 2,052 41 11 Total income 6,552 8,041 5,636 Expenses: Salaries and employee benefits 658 433 600 Other 2,015 1,384 1,617 Total expenses 2,673 1,817 2,217 Income before income taxes and equity in undistributed net income of subsidiaries 3,879 6,224 3,419 Income tax benefit 84 477 1,281 Income before equity in undistributed net income of subsidiaries 3,963 6,701 4,700 Equity in undistributed net income of subsidiaries 47,642 7,968 8,150 Net income $ 51,605 $ 14,669 $ 12,850
Condensed Statements of Cash Flows	Financial statements of Origin Bancorp, Inc. (parent company only) are as follows: (Dollars in thousands) Years Ended December 31, Condensed Statements of Cash Flows 2018 2017 2016 Cash flows from operating activities: Net income $ 51,605 $ 14,669 $ 12,850 Adjustments to reconcile net income to net cash provided by operating activities: Deferred income taxes 9 11 9 Equity in undistributed net income of subsidiaries (47,642 ) (7,968 ) (8,150 ) Amortization of subordinated debentures discount 25 23 21 Stock compensation 356 78 65 Other, net (2,543 ) 5,488 215 Net cash provided by operating activities 1,810 12,301 5,010 Cash flows from investing activities: Capital contributed to subsidiaries (45,794 ) — (37,808 ) Net purchases of non-marketable equity securities held in other financial institutions (2,213 ) (2,065 ) — Net cash used in investing activities (48,007 ) (2,065 ) (37,808 ) Cash flows from financing activities: Net decrease in short-term borrowings — — (3,600 ) Dividends paid (5,941 ) (6,996 ) (5,764 ) Taxes paid related to net share settlement of equity awards (23 ) (410 ) (739 ) Cash received on exercise of stock options 559 186 737 Proceeds from issuance of common stock 95,178 — 41,809 Payment to repurchase preferred stock (48,260 ) — 1,998 Net cash provided by (used by) financing activities 41,513 (7,220 ) 34,441 Net (decrease) increase in cash and cash equivalents (4,684 ) 3,016 1,643 Cash and cash equivalents at beginning of year 10,566 7,550 5,907 Cash and cash equivalents at end of year $ 5,882 $ 10,566 $ 7,550

Summary of Quarterly Financia_2

Summary of Quarterly Financial Statements (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Selected Unaudited Data	The following tables present selected unaudited data from the Company's condensed consolidated quarterly statements of income for the quarterly periods within the years ended December 31, 2018 and 2017 : Quarters Ended - 2018 (Dollars in thousands) December 31 September 30 June 30 March 31 Total interest income $ 53,058 $ 48,842 $ 44,752 $ 41,444 Total interest expense 10,997 9,345 7,582 6,720 Net interest income 42,061 39,497 37,170 34,724 Provision for credit losses 1,723 504 311 (1,524 ) Net interest income after provision for credit losses 40,338 38,993 36,859 36,248 Non-interest income, exclusive of (loss) gain on sales of securities, net 10,596 10,237 10,615 9,800 (Loss) gain on sales of securities, net (8 ) — — — Non-interest expense 35,023 34,344 32,012 29,857 Income before income taxes 15,903 14,886 15,462 16,191 Income tax expense 2,725 2,568 2,760 2,784 Net income 13,178 12,318 12,702 13,407 Less preferred stock dividends — — 808 1,115 Less income allocated to participating stockholders (1) 86 54 40 553 Net income available to common stockholders (1) $ 13,092 $ 12,264 $ 11,854 $ 11,739 Basic earnings per common share (1) $ 0.56 $ 0.52 $ 0.54 $ 0.60 Diluted earnings per common share 0.55 0.52 0.53 0.60 ____________________________ (1) Due to the methodology of how share allocations for preferred stock - Series D are computed under the two-class method, the sum of the quarterly periods may not agree to the year-to-date total presented in the consolidated statements of income for the year ended December 31, 2018. Quarters Ended - 2017 (Dollars in thousands) December 31 September 30 June 30 March 31 Total interest income $ 40,408 $ 39,614 $ 37,293 $ 35,278 Total interest expense 6,190 5,746 5,376 4,976 Net interest income 34,218 33,868 31,917 30,302 Provision for credit losses 242 3,327 1,953 2,814 Net interest income after provision for credit losses 33,976 30,541 29,964 27,488 Non-interest income 8,715 5,041 5,306 10,125 Non-interest expense 31,771 40,443 30,674 27,786 Income (loss) before income taxes 10,920 (4,861 ) 4,596 9,827 Income tax expense (benefit) 5,148 (2,688 ) 773 2,580 Net income (loss) 5,772 (2,173 ) 3,823 7,247 Less preferred stock dividends 1,116 1,115 1,115 1,115 Less income allocated to participating stockholders (1) 194 3 103 267 Net income (loss) available to common stockholders (1) $ 4,462 $ (3,291 ) $ 2,605 $ 5,865 Basic earnings (loss) per common share (1) $ 0.23 $ (0.17 ) $ 0.13 $ 0.30 Diluted earnings (loss) per common share (1) 0.23 (0.17 ) 0.13 0.30 ____________________________ (1) Due to the methodology of how share allocations for preferred stock - Series D and losses are allocated under the two-class method, the sum of the quarterly periods may not agree to the year-to-date total presented in the consolidated statements of income for the year ended December 31, 2017.

Significant Accounting Polici_3

Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2018USD ($)centersegment	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Jan. 01, 2019USD ($)
Accounting Policies [Abstract]
Number of banking centers | center	41
Number of segments | segment	1
Equity investments	$ 11,700,000	$ 7,500,000
Property, Plant and Equipment [Line Items]
OREO	3,700,000	499,000
Penalties and related interest	0	0	$ 0
Investments in limited partnerships, LLCs and other privately held companies	$ 14,500,000	11,300,000
General partner ownership interest	0.10%
Investments in tax credit entities	$ 10,600,000	12,500,000
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification from accumulated other comprehensive income	2,480,000	(1,307,000)
Reclassification to retained earnings	191,585,000	145,122,000
Reclassification from operating activities	(77,826,000)	(61,988,000)	(54,578,000)
Reclassification to investing activities	(764,927,000)	(197,650,000)	(154,705,000)
ASU No. 2018-15
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Capitalized costs relating to internal use software	$ 455,000
Buildings and improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	35 years
Buildings and improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	39 years
Furniture, fixtures and equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	3 years
Furniture, fixtures and equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	7 years
ASU No. 2018-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification from accumulated other comprehensive income		282,000
Reclassification to retained earnings		282,000
ASU No. 2016-15
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification from operating activities	$ 844,000		3,600,000
Reclassification to investing activities		$ 844,000	$ 3,600,000
ASU No. 2016-02 | Subsequent Event
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use asset				$ 26,000,000
Lease obligation				$ 26,000,000

Earnings Per Share (Details)

Earnings Per Share (Details) $ / shares in Units, $ in Thousands	Oct. 05, 2016	Dec. 31, 2018USD ($)$ / shares	Sep. 30, 2018USD ($)$ / shares	Jun. 30, 2018USD ($)$ / shares	Mar. 31, 2018USD ($)$ / shares	Dec. 31, 2017USD ($)$ / shares	Sep. 30, 2017USD ($)$ / shares	Jun. 30, 2017USD ($)$ / shares	Mar. 31, 2017USD ($)$ / shares	Dec. 31, 2018USD ($)$ / sharesshares	Dec. 31, 2017USD ($)$ / sharesshares	Dec. 31, 2016USD ($)$ / sharesshares
Basic earnings per common share
Net income		$ 13,178	$ 12,318	$ 12,702	$ 13,407	$ 5,772	$ (2,173)	$ 3,823	$ 7,247	$ 51,605	$ 14,669	$ 12,850
Less: Dividends to preferred stock		0	0	808	1,115	1,116	1,115	1,115	1,115	1,923	4,461	4,398
Net income allocated to participating stockholders		86	54	40	553	194	3	103	267	1,029	377	316
Net income available to common stockholders		$ 13,092	$ 12,264	$ 11,854	$ 11,739	$ 4,462	$ (3,291)	$ 2,605	$ 5,865	$ 48,653	$ 9,831	$ 8,136
Weighted average common shares outstanding (in shares) | shares										21,995,990	19,418,278	17,545,655
Basic earnings per common share ($ per share) | $ / shares		$ 0.56	$ 0.52	$ 0.54	$ 0.60	$ 0.23	$ (0.17)	$ 0.13	$ 0.30	$ 2.21	$ 0.51	$ 0.46
Diluted earnings per common share
Diluted earnings applicable to common stockholders										$ 48,819	$ 9,861	$ 8,136
Weighted average diluted common shares outstanding:
Weighted average common shares outstanding (in shares) | shares										21,995,990	19,418,278	17,545,655
Dilutive effect of common stock options (in shares) | shares										198,439	216,134	187,406
Weighted average diluted common shares outstanding (in shares) | shares										22,194,429	19,634,412	17,733,061
Diluted earnings per common share ($ per share) | $ / shares		$ 0.55	$ 0.52	$ 0.53	$ 0.60	$ 0.23	$ (0.17)	$ 0.13	$ 0.30	$ 2.20	$ 0.50	$ 0.46
Common stock split ratio	2											2

Securities - Amortized Cost and

Securities - Amortized Cost and Estimated Fair Value of Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Available for sale:
Amortized Cost	$ 579,051	$ 402,686
Gross Unrealized Gains	2,276	4,994
Gross Unrealized Losses	(5,683)	(3,148)
Fair Value	575,644	404,532
Held to maturity:
Amortized Cost	19,169	20,188
Fair Value	19,136	20,265
Securities carried at fair value through income:
Fair Value	11,361	12,033
State and municipal securities
Available for sale:
Amortized Cost	99,780	125,909
Gross Unrealized Gains	1,266	4,104
Gross Unrealized Losses	(163)	(35)
Fair Value	100,883	129,978
Held to maturity:
Amortized Cost	19,169	20,188
Gross Unrealized Gains	0	77
Gross Unrealized Losses	(33)	0
Fair Value	19,136	20,265
Securities carried at fair value through income:
Amortized Cost	11,503	11,918
Fair Value	11,361	12,033
Corporate bonds
Available for sale:
Amortized Cost	10,997	3,000
Gross Unrealized Gains	102	136
Gross Unrealized Losses	(65)	0
Fair Value	11,034	3,136
U.S. government and agency securities
Available for sale:
Amortized Cost	61,122
Gross Unrealized Gains	82
Gross Unrealized Losses	(54)
Fair Value	61,150
Commercial mortgage-backed securities
Available for sale:
Amortized Cost	16,672
Gross Unrealized Gains	94
Gross Unrealized Losses	0
Fair Value	16,766
Residential mortgage-backed securities
Available for sale:
Amortized Cost	188,058	105,132
Gross Unrealized Gains	417	492
Gross Unrealized Losses	(2,160)	(595)
Fair Value	186,315	105,029
Residential collateralized mortgage obligations
Available for sale:
Amortized Cost	202,422	168,645
Gross Unrealized Gains	315	262
Gross Unrealized Losses	(3,241)	(2,518)
Fair Value	$ 199,496	$ 166,389

Securities - Unrealized Losses

Securities - Unrealized Losses (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Fair Value
Less than 12 Months	$ 110,851	$ 118,920
12 Months or More	206,535	82,065
Total	317,386	200,985
Unrealized Loss
Less than 12 Months	(313)	(844)
12 Months or More	(5,370)	(2,304)
Total	(5,683)	(3,148)
State and municipal securities
Fair Value
Less than 12 Months	13,101	2,114
12 Months or More	8,463	1,210
Total	21,564	3,324
Unrealized Loss
Less than 12 Months	(50)	(5)
12 Months or More	(113)	(30)
Total	(163)	(35)
Fair Value
Less than 12 Months	13,921
12 Months or More	0
Total	13,921
Unrealized Loss
Less than 12 Months	(33)
12 Months or More	0
Total	(33)
Corporate bonds
Fair Value
Less than 12 Months	7,932
12 Months or More	0
Total	7,932
Unrealized Loss
Less than 12 Months	(65)
12 Months or More	0
Total	(65)
U.S. government and agency securities
Fair Value
Less than 12 Months	56,271
12 Months or More	0
Total	56,271
Unrealized Loss
Less than 12 Months	(54)
12 Months or More	0
Total	(54)
Commercial mortgage-backed securities
Fair Value
Less than 12 Months	0
12 Months or More	0
Total	0
Unrealized Loss
Less than 12 Months	0
12 Months or More	0
Total	0
Residential mortgage-backed securities
Fair Value
Less than 12 Months	18,836	46,018
12 Months or More	77,471	20,233
Total	96,307	66,251
Unrealized Loss
Less than 12 Months	(65)	(198)
12 Months or More	(2,095)	(397)
Total	(2,160)	(595)
Residential collateralized mortgage obligations
Fair Value
Less than 12 Months	14,711	70,788
12 Months or More	120,601	60,622
Total	135,312	131,410
Unrealized Loss
Less than 12 Months	(79)	(641)
12 Months or More	(3,162)	(1,877)
Total	$ (3,241)	$ (2,518)

Securities - Narrative (Details

Securities - Narrative (Details)	Dec. 31, 2018security
Investments, Debt and Equity Securities [Abstract]
Number of securities in an unrealized loss positions (in security)	118

Securities - Proceeds from Sale

Securities - Proceeds from Sales of Securities Available for Sale and Gross Gains (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Proceeds from sales	$ 20,877	$ 0	$ 7,136
Gross realized gains	381	0	136
Gross realized losses	(389)	0	0
Tax (benefit) expense related to securities gains/losses	$ (2)	$ 0	$ 48

Securities - Contractual Maturi

Securities - Contractual Maturities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Amortized Cost
Due in one year or less	$ 58,681
Due after one year through five years	25,175
Due after five years through ten years	81,253
Due after ten years	6,790
Amortized Cost	579,051	$ 402,686
Fair Value
Due in one year or less	58,654
Due after one year through five years	25,422
Due after five years through ten years	82,144
Due after ten years	6,847
Available for sale, fair value	575,644	404,532
Amortized Cost
Due in one year or less	0
Due after one year through five years	13,954
Due after five years through ten years	0
Due after ten years	5,215
Amortized Cost	19,169	20,188
Fair Value
Due in one year or less	0
Due after one year through five years	13,921
Due after five years through ten years	0
Due after ten years	5,215
Held to maturity, fair value	19,136	20,265
Commercial mortgage-backed securities
Amortized Cost
Without single maturity date	16,672
Amortized Cost	16,672
Fair Value
Without single maturity date	16,766
Available for sale, fair value	16,766
Amortized Cost
Without single maturity date	0
Fair Value
Without single maturity date	0
Residential mortgage-backed securities
Amortized Cost
Without single maturity date	188,058
Amortized Cost	188,058	105,132
Fair Value
Without single maturity date	186,315
Available for sale, fair value	186,315	105,029
Amortized Cost
Without single maturity date	0
Fair Value
Without single maturity date	0
Residential collateralized mortgage obligations
Amortized Cost
Without single maturity date	202,422
Amortized Cost	202,422	168,645
Fair Value
Without single maturity date	199,496
Available for sale, fair value	199,496	$ 166,389
Amortized Cost
Without single maturity date	0
Fair Value
Without single maturity date	$ 0

Securities - Securities Pledged

Securities - Securities Pledged as Collateral (Details) - USD ($) $ in Thousands	Dec. 31, 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	$ 364,055	$ 276,319
Carrying value of securities pledged to repurchase agreements
Schedule of Held-to-maturity Securities [Line Items]
Securities pledged as collateral	$ 48,847	$ 36,685

Loans - Schedule of Loans (Deta

Loans - Schedule of Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Loans and Leases Receivable Disclosure [Line Items]
Loans held for sale	$ 52,210	$ 65,343
Loans held for investment	3,789,105	3,241,031
Less: Allowance for loan losses	34,203	37,083	$ 50,531	$ 41,230
Net loans held for investment	3,754,902	3,203,948
Net deferred loan fees	3,200	1,000
Real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	2,287,776	1,976,262
Real estate | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	1,228,402	1,083,275
Less: Allowance for loan losses	8,999	8,998	8,718	7,451
Real estate | Construction/land/land development
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	429,660	322,404
Less: Allowance for loan losses	3,331	2,950	2,805	3,927
Real estate | Residential real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	629,714	570,583
Less: Allowance for loan losses	5,705	5,807	5,003	5,094
Commercial and industrial
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	1,272,566	989,220
Less: Allowance for loan losses	15,616	18,831	33,590	23,648
Mortgage warehouse lines of credit
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	207,871	255,044
Less: Allowance for loan losses	316	214	139	761
Consumer
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	20,892	20,505
Less: Allowance for loan losses	$ 236	$ 283	$ 276	$ 349

Loans - Narrative (Details)

Loans - Narrative (Details)	12 Months Ended
	Dec. 31, 2018USD ($)loan	Dec. 31, 2017USD ($)loan	Dec. 31, 2016USD ($)loan
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment at fair value	$ 18,571,000	$ 26,611,000
Amount committed to advance in connection with impaired loans	2,000
Nonaccrual mortgage loans held for sale recorded at fair value	$ 741,000	$ 0
Number of loans that defaulted | loan	0	1	4
Nonperforming Financial Instruments
Loans and Leases Receivable Disclosure [Line Items]
Gross interest income that would have been recorded	$ 1,400,000	$ 1,300,000	$ 1,600,000
Interest income	0	0	0
Outstanding principal balance		241,000	$ 5,500,000
Real estate | Commercial real estate
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment at fair value	$ 18,600,000	21,000,000
Commercial and industrial
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment at fair value		$ 5,600,000

Loans - Loans by Credit Quality

Loans - Loans by Credit Quality Indicator (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	$ 3,789,105	$ 3,241,031
Pass
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	3,670,261	3,125,722
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	39,364	24,078
Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	79,480	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	2,287,776	1,976,262
Real estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	2,250,960	1,935,344
Real estate | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	4,400	8,746
Real estate | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	32,416	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	1,228,402	1,083,275
Real estate | Commercial real estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	1,206,194	1,055,911
Real estate | Commercial real estate | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	3,101	7,798
Real estate | Commercial real estate | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	19,107	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	429,660	322,404
Real estate | Construction/land/land development | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	426,770	318,488
Real estate | Construction/land/land development | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	157	170
Real estate | Construction/land/land development | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	2,733	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	629,714	570,583
Real estate | Residential real estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	617,996	560,945
Real estate | Residential real estate | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	1,142	778
Real estate | Residential real estate | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	10,576	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	1,272,566	989,220
Commercial and industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	1,190,718	915,111
Commercial and industrial | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	34,964	15,332
Commercial and industrial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	46,884	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	207,871	255,044
Mortgage warehouse lines of credit | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	207,871	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	20,892	20,505
Consumer | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans held for investment	20,712	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	180	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	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 34,085	$ 41,272
Current Loans	3,755,020	3,199,759
Total Loans Receivable	3,789,105	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	5,911	14,240
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	10,207	13,360
Loans Past Due 90 Days or More
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	17,967	13,672
Real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	18,996	21,379
Current Loans	2,268,780	1,954,883
Total Loans Receivable	2,287,776	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	5,252	12,545
Real estate | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,936	3,310
Real estate | Loans Past Due 90 Days or More
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	11,808	5,524
Real estate | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	9,091	12,368
Current Loans	1,219,311	1,070,907
Total Loans Receivable	1,228,402	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	458	8,427
Real estate | Commercial real estate | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,409	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	7,224	1,150
Real estate | Construction/land/land development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	3,092	2,124
Current Loans	426,568	320,280
Total Loans Receivable	429,660	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	2,657	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	435	464
Real estate | Residential real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	6,813	6,887
Current Loans	622,901	563,696
Total Loans Receivable	629,714	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	2,137	2,630
Real estate | Residential real estate | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	527	347
Real estate | Residential real estate | Loans Past Due 90 Days or More
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	4,149	3,910
Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	14,696	19,513
Current Loans	1,257,870	969,707
Total Loans Receivable	1,272,566	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	276	1,517
Commercial and industrial | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	8,263	9,922
Commercial and industrial | Loans Past Due 90 Days or More
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	6,157	8,074
Mortgage warehouse lines of credit
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	0	0
Current Loans	207,871	255,044
Total Loans Receivable	207,871	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	393	380
Current Loans	20,499	20,125
Total Loans Receivable	20,892	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	383	178
Consumer | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	8	128
Consumer | Loans Past Due 90 Days or More
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 2	$ 74

Loans - Allowance for Loan Loss

Loans - Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance				$ 37,083				$ 50,531	$ 37,083	$ 50,531	$ 41,230
Charge-offs									7,124	23,877	26,406
Recoveries									2,663	2,210	4,542
Provision (Benefit)									1,581	8,219	31,165
Ending balance	$ 34,203				$ 37,083				34,203	37,083	50,531
Provision for credit losses	1,723	$ 504	$ 311	(1,524)	242	$ 3,327	$ 1,953	2,814	1,014	8,336	30,078
Provision (release of provision) for off-balance sheet commitments									(567)	117	(1,100)
Real estate | Commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance				8,998				8,718	8,998	8,718	7,451
Charge-offs									1,300	463	422
Recoveries									226	93	25
Provision (Benefit)									1,075	650	1,664
Ending balance	8,999				8,998				8,999	8,998	8,718
Real estate | Construction/land/land development
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance				2,950				2,805	2,950	2,805	3,927
Charge-offs									228	3	24
Recoveries									6	5	7
Provision (Benefit)									603	143	(1,105)
Ending balance	3,331				2,950				3,331	2,950	2,805
Real estate | Residential real estate
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance				5,807				5,003	5,807	5,003	5,094
Charge-offs									407	1,446	505
Recoveries									133	125	185
Provision (Benefit)									172	2,125	229
Ending balance	5,705				5,807				5,705	5,807	5,003
Commercial and industrial
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance				18,831				33,590	18,831	33,590	23,648
Charge-offs									5,068	21,767	24,851
Recoveries									2,206	1,918	4,199
Provision (Benefit)									(353)	5,090	30,594
Ending balance	15,616				18,831				15,616	18,831	33,590
Mortgage warehouse lines of credit
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance				214				139	214	139	761
Charge-offs									0	0	0
Recoveries									0	0	0
Provision (Benefit)									102	75	(622)
Ending balance	316				214				316	214	139
Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning Balance				$ 283				$ 276	283	276	349
Charge-offs									121	198	604
Recoveries									92	69	126
Provision (Benefit)									(18)	136	405
Ending balance	$ 236				$ 283				$ 236	$ 283	$ 276

Loans - Impaired Loans Evaluate

Loans - Impaired Loans Evaluated Individually and Collectively (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Period End Allowance Allocated to Loans Individually Evaluated for Impairment	$ 366	$ 4,807
Period End Allowance Allocated to Loans Collectively Evaluated for Impairment	33,837	32,276
Period End Loan Balance Individually Evaluated for Impairment	33,278	39,658
Period End Loan Balance Collectively Evaluated for Impairment	3,737,256	3,174,762
Loans held for investment at fair value	18,571	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	5	312
Period End Allowance Allocated to Loans Collectively Evaluated for Impairment	8,994	8,686
Period End Loan Balance Individually Evaluated for Impairment	8,773	4,945
Period End Loan Balance Collectively Evaluated for Impairment	1,201,058	1,057,330
Loans held for investment at fair value	18,600	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	3,312	2,946
Period End Loan Balance Individually Evaluated for Impairment	1,017	1,963
Period End Loan Balance Collectively Evaluated for Impairment	428,643	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	68	72
Period End Allowance Allocated to Loans Collectively Evaluated for Impairment	5,637	5,735
Period End Loan Balance Individually Evaluated for Impairment	6,876	7,915
Period End Loan Balance Collectively Evaluated for Impairment	622,838	562,668
Commercial and industrial
Financing Receivable, Allowance for Credit Losses [Line Items]
Period End Allowance Allocated to Loans Individually Evaluated for Impairment	255	4,356
Period End Allowance Allocated to Loans Collectively Evaluated for Impairment	15,361	14,475
Period End Loan Balance Individually Evaluated for Impairment	16,428	24,598
Period End Loan Balance Collectively Evaluated for Impairment	1,256,138	959,011
Loans held for investment at fair value		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	316	214
Period End Loan Balance Individually Evaluated for Impairment	0	0
Period End Loan Balance Collectively Evaluated for Impairment	207,871	255,044
Consumer
Financing Receivable, Allowance for Credit Losses [Line Items]
Period End Allowance Allocated to Loans Individually Evaluated for Impairment	19	63
Period End Allowance Allocated to Loans Collectively Evaluated for Impairment	217	220
Period End Loan Balance Individually Evaluated for Impairment	184	237
Period End Loan Balance Collectively Evaluated for Impairment	$ 20,708	$ 20,268

Loans - Impaired Loans (Details

Loans - Impaired Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	$ 39,123	$ 43,810
Recorded Investment with no Allowance	31,461	16,647
Recorded Investment with an Allowance	1,817	23,011
Total Recorded Investment	33,278	39,658
Allocation of Allowance for Loan Losses	366	4,807
Real estate
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	20,038	18,339
Recorded Investment with no Allowance	15,655	10,345
Recorded Investment with an Allowance	1,011	4,478
Total Recorded Investment	16,666	14,823
Allocation of Allowance for Loan Losses	92	388
Real estate | Commercial real estate
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	10,894	6,047
Recorded Investment with no Allowance	8,725	1,782
Recorded Investment with an Allowance	48	3,163
Total Recorded Investment	8,773	4,945
Allocation of Allowance for Loan Losses	5	312
Real estate | Construction/land/land development
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	1,329	2,268
Recorded Investment with no Allowance	838	1,813
Recorded Investment with an Allowance	179	150
Total Recorded Investment	1,017	1,963
Allocation of Allowance for Loan Losses	19	4
Real estate | Residential real estate
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	7,815	10,024
Recorded Investment with no Allowance	6,092	6,750
Recorded Investment with an Allowance	784	1,165
Total Recorded Investment	6,876	7,915
Allocation of Allowance for Loan Losses	68	72
Commercial and industrial
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	18,883	25,212
Recorded Investment with no Allowance	15,806	6,161
Recorded Investment with an Allowance	622	18,437
Total Recorded Investment	16,428	24,598
Allocation of Allowance for Loan Losses	255	4,356
Consumer
Financing Receivable, Impaired [Line Items]
Unpaid Contractual Principal Balance	202	259
Recorded Investment with no Allowance	0	141
Recorded Investment with an Allowance	184	96
Total Recorded Investment	184	237
Allocation of Allowance for Loan Losses	$ 19	$ 63

Loans - Average Recorded Invest

Loans - Average Recorded Investment and Interest Recognized on Impaired Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	$ 33,896	$ 58,057	$ 114,671
Interest Income Recognized	347	632	3,870
Real estate
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	18,831	17,497	19,423
Interest Income Recognized	143	250	713
Real estate | Commercial real estate
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	9,901	7,046	7,179
Interest Income Recognized	67	165	273
Real estate | Construction/land/land development
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	1,401	1,053	1,179
Interest Income Recognized	16	10	55
Real estate | Residential real estate
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	7,529	9,398	11,065
Interest Income Recognized	60	75	385
Commercial and industrial
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	14,814	40,316	94,940
Interest Income Recognized	199	375	3,139
Consumer
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	251	244	308
Interest Income Recognized	$ 5	$ 7	$ 18

Loans - Non Performing (Nonaccr

Loans - Non Performing (Nonaccrual) Loans Held For Investment (Details) - Nonperforming Financial Instruments - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Total nonaccrual loans	$ 31,856	$ 23,802
Real estate
Financing Receivable, Recorded Investment [Line Items]
Total nonaccrual loans	15,884	10,008
Real estate | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Total nonaccrual loans	8,281	1,745
Real estate | Construction/land/land development
Financing Receivable, Recorded Investment [Line Items]
Total nonaccrual loans	935	1,097
Real estate | Residential real estate
Financing Receivable, Recorded Investment [Line Items]
Total nonaccrual loans	6,668	7,166
Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Total nonaccrual loans	15,792	13,512
Consumer
Financing Receivable, Recorded Investment [Line Items]
Total nonaccrual loans	$ 180	$ 282

Loans - Troubled Debt Restructu

Loans - Troubled Debt Restructurings (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Modifications [Line Items]
Loans classified as troubled debt restructurings	$ 7,847	$ 16,856
Nonaccrual TDRs
Financing Receivable, Modifications [Line Items]
Loans classified as troubled debt restructurings	5,793	2,622
Performing TDRs
Financing Receivable, Modifications [Line Items]
Loans classified as troubled debt restructurings	$ 2,054	$ 14,234

Loans - Pre-Modification Balanc

Loans - Pre-Modification Balances of TDR (Details) - Nonperforming Financial Instruments $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)loan	Dec. 31, 2017USD ($)loan	Dec. 31, 2016USD ($)loan
Financing Receivable, Modifications [Line Items]
Number of Loans Restructured | loan	11	16	19
Pre-Modification Recorded Balance	$ 911	$ 13,052	$ 20,085
Total Modifications	$ 771	$ 12,272	$ 9,766
Real estate
Financing Receivable, Modifications [Line Items]
Number of Loans Restructured | loan	7	7	8
Pre-Modification Recorded Balance	$ 680	$ 2,204	$ 527
Total Modifications	$ 548	$ 2,305	$ 396
Real estate | Commercial real estate
Financing Receivable, Modifications [Line Items]
Number of Loans Restructured | loan	1	4	2
Pre-Modification Recorded Balance	$ 252	$ 2,071	$ 398
Total Modifications	$ 150	$ 2,057	$ 300
Real estate | Residential real estate
Financing Receivable, Modifications [Line Items]
Number of Loans Restructured | loan	6	3	6
Pre-Modification Recorded Balance	$ 428	$ 133	$ 129
Total Modifications	$ 398	$ 248	$ 96
Commercial and industrial
Financing Receivable, Modifications [Line Items]
Number of Loans Restructured | loan	3	8	10
Pre-Modification Recorded Balance	$ 198	$ 10,799	$ 19,536
Total Modifications	$ 194	$ 9,922	$ 9,349
Consumer
Financing Receivable, Modifications [Line Items]
Number of Loans Restructured | loan	1	1	1
Pre-Modification Recorded Balance	$ 33	$ 49	$ 22
Total Modifications	29	45	21
Term Concessions
Financing Receivable, Modifications [Line Items]
Total Modifications	378	12,022	9,446
Term Concessions | Real estate
Financing Receivable, Modifications [Line Items]
Total Modifications	198	2,095	94
Term Concessions | Real estate | Commercial real estate
Financing Receivable, Modifications [Line Items]
Total Modifications	150	2,057	94
Term Concessions | Real estate | Residential real estate
Financing Receivable, Modifications [Line Items]
Total Modifications	48	38	0
Term Concessions | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Total Modifications	180	9,882	9,331
Term Concessions | Consumer
Financing Receivable, Modifications [Line Items]
Total Modifications	0	45	21
Interest Rate Concessions
Financing Receivable, Modifications [Line Items]
Total Modifications	19	0	11
Interest Rate Concessions | Real estate
Financing Receivable, Modifications [Line Items]
Total Modifications	19	0	0
Interest Rate Concessions | Real estate | Commercial real estate
Financing Receivable, Modifications [Line Items]
Total Modifications	0	0	0
Interest Rate Concessions | Real estate | Residential real estate
Financing Receivable, Modifications [Line Items]
Total Modifications	19	0	0
Interest Rate Concessions | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Total Modifications	0	0	11
Interest Rate Concessions | Consumer
Financing Receivable, Modifications [Line Items]
Total Modifications	0	0	0
Combination
Financing Receivable, Modifications [Line Items]
Total Modifications	374	250	309
Combination | Real estate
Financing Receivable, Modifications [Line Items]
Total Modifications	331	210	302
Combination | Real estate | Commercial real estate
Financing Receivable, Modifications [Line Items]
Total Modifications	0	0	206
Combination | Real estate | Residential real estate
Financing Receivable, Modifications [Line Items]
Total Modifications	331	210	96
Combination | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Total Modifications	14	40	7
Combination | Consumer
Financing Receivable, Modifications [Line Items]
Total Modifications	$ 29	$ 0	$ 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	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	$ 575,644	$ 404,532
Securities carried at fair value through income	11,361	12,033
Loans held for sale	21,562	32,768
Loans at fair value	18,571	26,611
Mortgage servicing rights	25,114	24,182	$ 29,385	$ 31,522
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	575,644	404,532
Securities carried at fair value through income	11,361	12,033
Loans held for sale	21,562	32,768
Loans at fair value	18,571	26,611
Mortgage servicing rights	25,114	24,182
Other assets - derivatives	3,563	3,146
Total recurring fair value measurements - assets	655,815	503,272
Other liabilities - derivatives	(2,846)	(3,320)
Total recurring fair value measurements - liabilities	(2,846)	(3,320)
Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	55,515	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	55,515	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	480,768	362,517
Securities carried at fair value through income	0	0
Loans held for sale	21,562	32,768
Loans at fair value	0	0
Mortgage servicing rights	0	0
Other assets - derivatives	3,563	3,146
Total recurring fair value measurements - assets	505,893	398,431
Other liabilities - derivatives	(2,846)	(3,320)
Total recurring fair value measurements - liabilities	(2,846)	(3,320)
Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	39,361	42,015
Securities carried at fair value through income	11,361	12,033
Loans held for sale	0	0
Loans at fair value	18,571	26,611
Mortgage servicing rights	25,114
Other assets - derivatives	0	0
Total recurring fair value measurements - assets	94,407	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	100,883	129,978
Securities carried at fair value through income	11,361	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	61,522	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	39,361	42,015
Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	11,034	3,136
Corporate bonds | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	11,034	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	11,034	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. treasury securities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	55,515
U.S. treasury securities | Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	55,515
U.S. treasury securities | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	0
U.S. treasury securities | Fair Value, Measurements, Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	0
U.S. government agency securities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	5,635
U.S. government 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 agency securities | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	5,635
U.S. government 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	16,766
Commercial mortgage-backed securities | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale	16,766
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	16,766
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	186,315	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	186,315	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	186,315	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	199,496	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	199,496	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	199,496	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	12 Months Ended
	Dec. 31, 2018	Dec. 31, 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	(7,651)	(3,854)
Balance at end of period	18,571	26,611
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	(389)	(712)
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	1,895
Purchases	0	3,061
Sales		(2,250)
Settlements	0	0
Balance at end of period	25,114	24,182
MSRs | Mortgage banking revenue
Changes in Level 3 assets and liabilities measured at fair value on a recurring basis
Gain (loss) recognized in earnings	(963)	(6,014)
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	(597)	425
Purchases, issuances, sales and settlements:
Originations	0
Purchases	259	275
Sales		0
Settlements	(2,316)	(2,543)
Balance at end of period	39,361	42,015
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 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	(414)	(381)
Balance at end of period	11,361	12,033
Securities 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 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	$ (258)	$ (97)

Fair Value of Financial Instr_5

Fair Value of Financial Instruments - Assumptions Used to Value Mortgage Servicing Rights (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Prepayment speed	9.90%	10.80%
Discount rate	10.42%	9.33%

Fair Value of Financial Instr_6

Fair Value of Financial Instruments - Difference Between Fair Value and Unpaid Principal Balance (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Option, Quantitative Disclosures [Line Items]
Aggregate Fair Value	$ 51,494,000	$ 71,412,000
Aggregate Unpaid Principal Balance	51,067,000	70,176,000
Difference	427,000	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	21,562,000	32,768,000
Aggregate Unpaid Principal Balance	21,173,000	32,216,000
Difference	389,000	552,000
Loans, 90 days or more past due	741,000	2,400,000
Commercial and industrial loans held for investment
Fair Value, Option, Quantitative Disclosures [Line Items]
Aggregate Fair Value		5,611,000
Aggregate Unpaid Principal Balance		5,591,000
Difference		20,000
Commercial real estate loans held for investment
Fair Value, Option, Quantitative Disclosures [Line Items]
Aggregate Fair Value	18,571,000	21,000,000
Aggregate Unpaid Principal Balance	18,391,000	20,451,000
Difference	180,000	549,000
Securities carried at fair value through income
Fair Value, Option, Quantitative Disclosures [Line Items]
Aggregate Fair Value	11,361,000	12,033,000
Aggregate Unpaid Principal Balance	11,503,000	11,918,000
Difference	(142,000)	115,000
U.S. government agency securities
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans, 90 days or more past due	$ 582,000	$ 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	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Mortgage banking revenue
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Fair value option impact on noninterest income	$ (163)	$ 477	$ (594)
Other income
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Fair value option impact on noninterest income	(647)	(809)	(662)
Other income | Loans at fair value held for investment
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Fair value option impact on noninterest income	(389)	(712)	(522)
Other income | Securities carried at fair value through income
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Fair value option impact on noninterest income	(258)	(97)	(140)
Noninterest income
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Fair value option impact on noninterest income	$ (810)	$ (332)	$ (1,256)

Fair Value of Financial Instr_8

Fair Value of Financial Instruments - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities without readily determinable fair value	$ 42,100,000
Impairment recorded on investments in equity securities that do not have readily determinable fair values	0
Liability to repurchase past due GNMA loans	30,600,000	$ 32,600,000
Fair value of impaired loans	33,278,000	39,658,000
Real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of impaired loans	16,666,000	14,823,000
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	1,400,000	18,200,000
Foreclosed assets	3,700,000	$ 499,000
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	$ 2,500,000
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	1.26%	0.0126%
Credit spread, loans held-for-investment	2.90%	2.83%
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	2.27%	0.0227%
Credit spread, loans held-for-investment	4.13%	4.13%

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	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities held to maturity	$ 19,136	$ 20,265
Carrying Value | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	116,678	187,187
Carrying Value | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities held to maturity	19,169	20,188
Non-marketable equity securities held in other financial institutions	42,149	22,967
Accrued interest and loan fees receivable	16,454	10,719
Deposits	3,783,138	3,512,014
FHLB advances and other borrowings	445,224	144,357
Junior subordinated debentures	9,644	9,619
Accrued interest payable	2,679	2,424
Carrying Value | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held for investment, net	3,736,331	3,177,337
Estimated Fair Value | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	116,678	187,187
Estimated Fair Value | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities held to maturity	19,136	20,265
Non-marketable equity securities held in other financial institutions	42,149	22,967
Accrued interest and loan fees receivable	16,454	10,719
Deposits	3,537,283	3,352,213
FHLB advances and other borrowings	444,286	145,330
Junior subordinated debentures	10,723	14,132
Accrued interest payable	2,679	2,424
Estimated Fair Value | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held for investment, net	$ 3,605,142	$ 3,238,872

Premises, Equipment and Lease_3

Premises, Equipment and Lease Commitments - Major Classifications of Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 120,120	$ 119,786
Accumulated depreciation	(45,106)	(42,378)
Total	75,014	77,408
Land, buildings and improvements
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	82,114	84,468
Furniture, fixtures and equipment
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	24,946	25,349
Leasehold improvements
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	11,345	9,673
Construction in process
Property, Plant and Equipment [Line Items]
Premises and equipment, gross	$ 1,715	$ 296

Premises, Equipment and Lease_4

Premises, Equipment and Lease Commitments - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)building	Dec. 31, 2017USD ($)land_tract	Dec. 31, 2016USD ($)	Sep. 30, 2018USD ($)
Property, Plant and Equipment [Line Items]
Net gain on sale of tracts of bank-owned land	$ (75)	$ 1,434	$ (198)
Other real estate owned	3,700	499
Depreciation expense	4,900	5,300	6,400
Lease and rental expense	$ 4,400	$ 4,200	$ 4,000
Closed banking center | Banking center in DFW area
Property, Plant and Equipment [Line Items]
Other real estate owned				$ 2,800
Building
Property, Plant and Equipment [Line Items]
Number of properties sold | building	1
Net gain on sale of tracts of bank-owned land	$ 81
Land
Property, Plant and Equipment [Line Items]
Number of properties sold | land_tract		2
Net gain on sale of tracts of bank-owned land		$ 1,500

Premises, Equipment and Lease_5

Premises, Equipment and Lease Commitments - Schedule of Capital Leases (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Gross book value	$ 1,665	$ 1,665
Accumulated amortization (included as a component of accumulated depreciation)	(1,204)	(963)
Net book value	461	702
Capital lease obligations	$ 508	$ 758

Premises, Equipment and Lease_6

Premises, Equipment and Lease Commitments - Minimum Future Lease Obligations for Capital and Operating Leases (Details) $ in Thousands	Dec. 31, 2018USD ($)
Capital Leases
2,019	$ 276
2,020	253
2,021	0
2,022	0
2,023	0
Thereafter	0
Total	529
Less amounts representing interest	21
Total lease obligations	508
Operating Leases
2,019	4,392
2,020	4,113
2,021	3,775
2,022	3,537
2,023	3,109
Thereafter	10,690
Total	$ 29,616

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jul. 01, 2018
Business Acquisition [Line Items]
Goodwill	$ 26,741,000	$ 22,192,000
Changes in carrying amount of goodwill		0
Amortization on other intangible assets	961,000	$ 518,000	$ 1,500,000
RCF
Business Acquisition [Line Items]
Goodwill	4,500,000			$ 4,500,000
Other intangible assets	$ 4,900,000			$ 4,900,000

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Components of Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Goodwill
Gross and Net	$ 26,741	$ 22,192
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization	(2,900)	(3,112)
Net	6,120
Total
Gross	35,761	27,448
Accumulated Amortization	(2,900)	(3,112)
Net	$ 32,861	$ 24,336
Core deposit intangibles
Finite-Lived Intangible Assets [Line Items]
Weighted Avg. Remaining Useful Life (Yrs.)	1 year 9 months 18 days	2 years 9 months 18 days
Gross	$ 1,260	$ 1,260
Accumulated Amortization	(945)	(754)
Net	315	506
Total
Accumulated Amortization	$ (945)	$ (754)
Relationship based intangibles
Finite-Lived Intangible Assets [Line Items]
Weighted Avg. Remaining Useful Life (Yrs.)	9 years 4 months 24 days	8 years 1 month 6 days
Gross	$ 7,304	$ 3,996
Accumulated Amortization	(1,819)	(2,358)
Net	5,485	1,638
Total
Accumulated Amortization	$ (1,819)	$ (2,358)
Tradename
Finite-Lived Intangible Assets [Line Items]
Weighted Avg. Remaining Useful Life (Yrs.)	2 years 3 months 19 days
Gross	$ 186
Accumulated Amortization	(46)
Net	140
Total
Accumulated Amortization	$ (46)
Non-compete
Finite-Lived Intangible Assets [Line Items]
Weighted Avg. Remaining Useful Life (Yrs.)	1 year 3 months 19 days
Gross	$ 270
Accumulated Amortization	(90)
Net	180
Total
Accumulated Amortization	$ (90)

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets - Estimated Future Amortization Expense for Intangible Assets (Details) $ in Thousands	Dec. 31, 2018USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2,019	$ 1,322
2,020	1,060
2,021	844
2,022	689
2,023	582
Thereafter	1,623
Net	$ 6,120

Mortgage Banking - Mortgage Ban

Mortgage Banking - Mortgage Banking Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Mortgage Banking [Abstract]
Origination	$ 854	$ 1,281	$ 1,312
Gain on sale of loans held for sale	6,403	11,615	12,546
Servicing	7,081	7,872	8,146
Total gross mortgage revenue	14,338	20,768	22,004
Mortgage derivatives gain (loss)	(725)	(205)	(24)
MSR change due to payoffs and paydowns	(3,618)	(4,005)	(4,425)
MSR and hedge fair value adjustment	(400)	(249)	(2,686)
Gain (loss) on MSR sale	25	(503)	0
Mortgage banking revenue	$ 9,620	$ 15,806	$ 14,869

Mortgage Banking - Activity in

Mortgage Banking - Activity in Mortgage Servicing Rights (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance at beginning of period	$ 24,182	$ 29,385	$ 31,522
Origination of servicing rights	1,895	3,061	4,230
Change in fair value, including amortization, net	(963)	(6,014)	(6,367)
Sale of servicing rights	0	(2,250)	0
Balance at end of period	$ 25,114	$ 24,182	$ 29,385

Mortgage Banking - Narrative (D

Mortgage Banking - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Mortgage Banking [Abstract]
Annual servicing fee income rate	0.28%
Mortgage loan servicing putback expenses	$ 0	$ 106,000	$ 83,000
Reserve for mortgage loan servicing putback expenses	196,000	254,000
Liability to repurchase past due GNMA loans	$ 30,600,000	$ 32,600,000

Deposits - Summary of Deposit B

Deposits - Summary of Deposit Balances (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Banking and Thrift [Abstract]
Noninterest-bearing demand	$ 951,015	$ 832,853
Interest bearing demand	738,725	738,967
Money market	815,997	900,039
Brokered	332,341	276,214
Savings	148,508	144,848
Time deposits	796,552	619,093
Total deposits	3,783,138	$ 3,512,014
Brokered time deposits	$ 7,900

Deposits - Narrative (Details)

Deposits - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Banking and Thrift [Abstract]
Municipal deposits	$ 395,000	$ 339,900
Time deposits in denominations of $250,000 or more	364,100	224,800
Overdrawn deposits reclassified as unsecured loans	$ 841	$ 640

Deposits - Maturities of Time D

Deposits - Maturities of Time Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Year Ended December 31,
2,019	$ 472,750
2,020	235,714
2,021	45,388
2,022	30,648
2,023	19,903
Total	$ 804,403	$ 619,093

Borrowings - Summary of Borrowe

Borrowings - Summary of Borrowed Funds (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Total FHLB advances and other borrowings	$ 445,224,000	$ 144,357,000
GNMA repurchase liability
Debt Instrument [Line Items]
Total FHLB advances and other borrowings	30,649,000	32,575,000
Long-term FHLB advances
Debt Instrument [Line Items]
Total FHLB advances and other borrowings	274,261,000	75,604,000
Junior subordinated debentures, net	274,261,000
Long-term FHLB advances | FHLB Advance, Maturing 2033
Debt Instrument [Line Items]
Advance	250,000,000
Junior subordinated debentures, net
Debt Instrument [Line Items]
Junior subordinated debentures, net	9,644,000	9,619,000
Overnight repurchase agreements with depositors
Debt Instrument [Line Items]
Total FHLB advances and other borrowings	40,314,000	36,178,000
Long-term FHLB advances
Debt Instrument [Line Items]
Total FHLB advances and other borrowings	$ 100,000,000	$ 0
Fixed interest rate	2.70%

Borrowings - Narrative (Details

Borrowings - Narrative (Details)	12 Months Ended
	Dec. 31, 2018USD ($)trustinstrument	Dec. 31, 2017USD ($)instrument
Debt Instrument [Line Items]
Number of wholly-owned, unconsolidated subsidiary grantor trusts | trust	2
FHLB
Debt Instrument [Line Items]
Net amounts available under the blanket floating lien	$ 468,800,000	$ 649,000,000
Letter of credit | FHLB
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 186,600,000	$ 230,100,000
Number of instruments | instrument	16	14
Line of credit | Federal Reserve Bank of Dallas
Debt Instrument [Line Items]
Availability to borrow	$ 795,500,000
Commercial and industrial loans pledged as collateral	1,050,000,000
Line of credit outstanding, long-term	0
Revolving credit loans | NexBank SSB
Debt Instrument [Line Items]
Maximum borrowing capacity	50,000,000
Line of credit outstanding, long-term	$ 0
Revolving credit loans | NexBank SSB | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	3.25%
Long-term FHLB advances | Minimum
Debt Instrument [Line Items]
Fixed interest rate	1.65%	1.99%
Long-term FHLB advances | Maximum
Debt Instrument [Line Items]
Fixed interest rate	5.72%	5.72%
Secured debt | NexBank SSB
Debt Instrument [Line Items]
Principal amount	$ 50,000,000
Junior subordinated debentures, net
Debt Instrument [Line Items]
Remaining purchase discount	1,200,000
Line of credit
Debt Instrument [Line Items]
Maximum borrowing capacity	180,000,000	$ 125,000,000
Line of credit outstanding, short-term	0
Amount held on deposit	$ 250,000
Overnight repurchase agreements with depositors
Debt Instrument [Line Items]
Daily average interest rate	0.86%	0.29%

Borrowings - Schedule of Maturi

Borrowings - Schedule of Maturities of Long-term Advances (Details) - Long-term FHLB advances	Dec. 31, 2018USD ($)
Years Ended December 31,
2,019	$ 828,000
2,020	1,099,000
2,021	1,142,000
2,022	2,551,000
2,023	4,451,000
Thereafter	264,190,000
Total	274,261,000
FHLB Advance, Maturing 2033
Years Ended December 31,
Advance	$ 250,000,000

Borrowings - Summary of Terms o

Borrowings - Summary of Terms of Current Debentures (Details) - Junior subordinated debentures, net $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)
Debt Instrument [Line Items]
Amount Outstanding	$ 10,826
CTB Statutory Trust I
Debt Instrument [Line Items]
Amount Outstanding	$ 6,702
Current Rate	5.83%
CTB Statutory Trust I | Maximum
Debt Instrument [Line Items]
Maximum Rate	12.50%
CTB Statutory Trust I | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	3.30%
First Louisiana Statutory Trust I
Debt Instrument [Line Items]
Amount Outstanding	$ 4,124
Current Rate	4.59%
First Louisiana Statutory Trust I | Maximum
Debt Instrument [Line Items]
Maximum Rate	16.00%
First Louisiana Statutory Trust I | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	1.80%

Derivative Financial Instrume_3

Derivative Financial Instruments - Fair Value of Derivative Instruments on the Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Derivatives, Fair Value [Line Items]
Notional Amounts	$ 454,363	$ 546,910
Fair Values	565	(215)
Interest Rate Swaps | Derivatives Not Designated as Hedging Instruments | Other Assets
Derivatives, Fair Value [Line Items]
Notional Amounts	127,512	132,959
Fair Values	2,302	2,314
Interest Rate Swaps | Derivatives Not Designated as Hedging Instruments | Other Liabilities
Derivatives, Fair Value [Line Items]
Notional Amounts	145,857	159,479
Fair Values	(2,625)	(3,221)
Forward Commitments to Purchase | Derivatives Not Designated as Hedging Instruments | Other Liabilities
Derivatives, Fair Value [Line Items]
Notional Amounts	140,000	160,000
Fair Values	709	(50)
Forward Commitments to Sell | Derivatives Not Designated as Hedging Instruments
Derivatives, Fair Value [Line Items]
Notional Amounts	24,750	57,400
Fair Values	(221)	(49)
Interest Rate-Lock Commitments | Derivatives Not Designated as Hedging Instruments | Other Assets
Derivatives, Fair Value [Line Items]
Notional Amounts	16,244	37,072
Fair Values	400	791
Cash Flow Hedging | Interest Rate Swaps | Derivatives Designated as Cash Flow Hedging Instruments | Other Assets
Derivatives, Fair Value [Line Items]
Notional Amounts	10,500	10,500
Fair Values	$ 152	$ 41

Derivative Financial Instrume_4

Derivative Financial Instruments - Weighted-average Rates Paid and Received (Details) - Interest Rate Swaps	Dec. 31, 2018	Dec. 31, 2017
Cash Flow Hedges | Paid
Derivative [Line Items]
Weighted-Average Interest Rate	4.81%	4.81%
Cash Flow Hedges | Received
Derivative [Line Items]
Weighted-Average Interest Rate	5.36%	4.19%
Financial Institution | Non-Hedging | Paid
Derivative [Line Items]
Weighted-Average Interest Rate	5.02%	4.81%
Financial Institution | Non-Hedging | Received
Derivative [Line Items]
Weighted-Average Interest Rate	4.67%	3.45%
Customer | Non-Hedging | Paid
Derivative [Line Items]
Weighted-Average Interest Rate	4.73%	3.54%
Customer | Non-Hedging | Received
Derivative [Line Items]
Weighted-Average Interest Rate	5.05%	4.89%

Derivative Financial Instrume_5

Derivative Financial Instruments - Gains and Losses Recognized on Derivative Instruments Not Designated as Hedging Instruments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Mortgage banking revenue
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized on derivatives not designated as hedging instruments	$ (2,450)	$ (259)	$ (2,570)
Other non-interest income
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized on derivatives not designated as hedging instruments	$ 584	$ 707	$ 842

Derivative Financial Instrume_6

Derivative Financial Instruments - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Cash collateral on deposit	$ 1.9	$ 7

Stock and Incentive Compensat_3

Stock and Incentive Compensation Plans - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
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	11,843	6,828
Unrecognized compensation cost	$ 5.3
Unrecognized compensation cost weighted average period for recognition	3 years 3 months 26 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)	986,348
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	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock compensation expense	$ 1,462	$ 1,150	$ 1,547
Related tax benefits recognized in net income	307	$ 403	541
Common stock options forfeited (in shares)		16,638
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock compensation expense	1,462	$ 1,180	1,082
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock compensation expense	$ 0	$ (30)	$ 465

Stock and Incentive Compensat_5

Stock and Incentive Compensation Plans - Time-vested Award Activity (Details) - Restricted Stock - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Shares
Nonvested shares, beginning balance (in shares)	61,293	84,019	102,012
Granted (in shares)	151,324	35,913	31,477
Vested (in shares)	(36,209)	(55,003)	(43,770)
Forfeited (in shares)	(2,001)	(3,636)	(5,700)
Nonvested shares, ending balance (in shares)	174,407	61,293	84,019
Weighted Average Grant-Date Fair Value
Nonvested shares, ending balance ($ per share)	$ 24.61	$ 24.22	$ 24.56
Granted ($ per share)	37.51	25.14	23.19
Vested ($ per share)	27.70	24.39	24.19
Forfeited ($ per share)	37.47	24.12	24.69
Nonvested shares, beginning balance ($ per share)	$ 35.01	$ 24.61	$ 24.22

Stock and Incentive Compensat_6

Stock and Incentive Compensation Plans - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Number of Shares
Outstanding at beginning of period (in shares)	319,500	358,638	531,922
Exercised (in shares)	(45,500)	(22,500)	(169,000)
Forfeited and expired (in shares)		(16,638)	(4,284)
Outstanding at end of period (in shares)	274,000	319,500	358,638	531,922
Exercisable at end of period (in shares)	274,000
Weighted Average Exercise Price
Outstanding at beginning of period ($ per share)	$ 10.65	$ 11.37	$ 11.69
Exercised ($ per share)	12.29	12.29	12.34
Forfeited and expired ($ per share)		23.89	12.29
Outstanding at end of period ($ per share)	10.38	$ 10.65	$ 11.37	$ 11.69
Exercisable at end of period ($ per share)	$ 10.38
Weighted average remaining contractual term (in years)	6 years 9 months	7 years 26 days	7 years 9 months 15 days	6 years 4 months 20 days
Weighted average remaining contractual term, exercisable (in years)	6 years 9 months
Aggregate intrinsic value	$ 6,493	$ 4,840	$ 3,844	$ 7,322
Aggregate intrinsic value, exercised	0	$ 304	$ 1,633
Aggregate intrinsic value, exercisable	$ 6,493

Employee Retirement Plan (Detai

Employee Retirement Plan (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Retirement Benefits [Abstract]
Employment period	25 days
Percentage of eligible compensation matched	6.00%
Company match percentage	50.00%
Total expense related to the Retirement Plan, including optional contributions	$ 1.6	$ 1.4	$ 1.4
Unallocated shares held by the Retirement Plan (in shares)		0
Fair value of allocated shares subject to this repurchase obligation		$ 35
Deferred compensation liability	9	8.3
Expense recorded for deferred compensation plan	$ 1.1	$ 1.1	$ 1.4

Income Taxes - Provision for In

Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Federal income taxes:
Current									$ 4,562	$ 715	$ 1,321
Deferred									5,658	4,644	1,532
State income taxes:
Current									638	167	195
Deferred									(21)	287	(132)
Income tax expense (benefit)	$ 2,725	$ 2,568	$ 2,760	$ 2,784	$ 5,148	$ (2,688)	$ 773	$ 2,580	$ 10,837	$ 5,813	$ 2,916

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification from accumulated other comprehensive income	$ 2,480	$ (1,307)
Reclassification to retained earnings	191,585	145,122
Valuation allowance related to carryforwards	867
Federal
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross net operating loss carryforwards	4,000
State
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Gross net operating loss carryforwards	$ 9,300
ASU No. 2018-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification from accumulated other comprehensive income		282
Reclassification to retained earnings		$ 282

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Income Tax Expense (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Amount
Income taxes computed at statutory rate									$ 13,113	$ 7,169	$ 5,518
Tax exempt revenue, net of nondeductible interest									(907)	(1,629)	(1,717)
Low-income housing tax credits, net of amortization									(691)	(624)	(936)
Other tax credits, net of add-backs									(1,218)	(1,002)	(1,002)
Bank-owned life insurance income									(150)	(221)	(248)
State income taxes, net of federal benefit									469	186	40
Stock-based compensation									(252)	(80)	(461)
Deferred tax asset and income tax receivable true-up									0	0	2,468
Return to provision adjustment									(67)	(241)	(1,026)
Deferred tax write-down for enacted tax rate changes									231	1,972	0
Other									309	283	280
Income tax expense (benefit)	$ 2,725	$ 2,568	$ 2,760	$ 2,784	$ 5,148	$ (2,688)	$ 773	$ 2,580	$ 10,837	$ 5,813	$ 2,916
Percent
Income taxes computed at statutory rate									21.00%	35.00%	35.00%
Tax exempt revenue, net of nondeductible interest									(1.45%)	(7.95%)	(10.89%)
Low-income housing tax credits, net of amortization									(1.11%)	(3.05%)	(5.94%)
Other tax credits, net of add-backs									(1.95%)	(4.89%)	(6.36%)
Bank-owned life insurance income									(0.24%)	(1.08%)	(1.57%)
State income taxes, net of federal benefit									0.75%	0.91%	0.26%
Stock-based compensation									(0.40%)	(0.39%)	(2.92%)
Deferred tax asset and income tax receivable true-up									0.00%	0.00%	15.65%
Return to provision adjustment									(0.11%)	(1.17%)	(6.51%)
Deferred tax write-down for enacted tax rate changes									0.37%	9.63%	0.00%
Other									0.49%	1.37%	1.78%
Total income tax expense									17.35%	28.38%	18.50%

Income Taxes - Significant Comp

Income Taxes - Significant Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets:
Credit loss allowances	$ 7,762	$ 8,535
Deferred compensation and share-based compensation	2,471	2,286
Net operating loss carryforwards	1,238	1,241
Credit carryforwards	0	5,968
Other	1,068	454
Gross deferred tax assets	12,539	18,484
Valuation allowance	(867)	(797)
Deferred tax assets net of valuation allowance	11,672	17,687
Deferred tax liabilities:
Available for sale securities mark to market	440	879
Basis difference in premises and equipment	1,655	2,082
Intangible assets	218	338
Mortgage servicing rights	5,426	5,225
Other	125	137
Gross deferred tax liabilities	7,864	8,661
Deferred Tax Assets, Net	$ 3,808	$ 9,026

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Stockholders' equity, beginning balance	$ 420,351	$ 420,093	$ 372,933	[1]
Net change	(4,069)	(2,156)	(1,721)
Reclassification of tax effects related to the adoption of ASU 2018-02:
Current	(276)
Deferred	558
Stockholders' equity, ending balance	549,779	420,351	420,093
Unrealized Gains (Losses) on AFS Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Stockholders' equity, beginning balance	1,280	3,505	5,289
Net change	(4,157)	(2,225)	(1,784)
Reclassification of tax effects related to the adoption of ASU 2018-02:
Current	(293)
Deferred	569
Stockholders' equity, ending balance	(2,601)	1,280	3,505
Unrealized Gains (Losses) on Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Stockholders' equity, beginning balance	27	(42)	(105)
Net change		69	63
Reclassification of tax effects related to the adoption of ASU 2018-02:
Stockholders' equity, ending balance		27	(42)
Unrealized Gains (Losses) on Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Net change	88
Reclassification of tax effects related to the adoption of ASU 2018-02:
Current	17
Deferred	(11)
Stockholders' equity, ending balance	121
Accumulated Other Comprehensive Income
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Stockholders' equity, beginning balance	1,307	3,463	5,184	[1]
Net change	(4,069)	(2,156)	(1,721)
Reclassification of tax effects related to the adoption of ASU 2018-02:
Stockholders' equity, ending balance	$ (2,480)	$ 1,307	$ 3,463
[1]	Presentation for 2016 beginning share and per share amounts has been adjusted to reflect a 2-for-1 stock split that occurred on October 5, 2016.

Capital and Regulatory Matter_2

Capital and Regulatory Matters (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Origin Bancorp, Inc.
Common Equity Tier 1 Capital to Risk-Weighted Assets
Actual, amount	$ 519,468	$ 360,069
Actual, ratio	11.94%	9.35%
Minimum capital required, amount	$ 304,431	$ 269,570
Minimum capital required, ratio	7.00%	7.00%
Tier 1 Capital to Risk-Weighted Assets
Actual, amount	$ 528,786	$ 433,338
Actual, ratio	12.16%	11.25%
Minimum capital required, amount	$ 369,668	$ 327,411
Minimum capital required, ratio	8.50%	8.50%
Total Capital to Risk-Weighted Assets
Actual, amount	$ 564,437	$ 472,437
Actual, ratio	12.98%	12.26%
Minimum capital required, amount	$ 456,647	$ 404,616
Minimum capital required, ratio	10.50%	10.50%
Leverage Ratio
Actual, amount	$ 528,786	$ 433,338
Actual, ratio	11.21%	10.53%
Minimum capital required, amount	$ 188,711	$ 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	$ 508,826	$ 416,175
Actual, ratio	11.73%	10.82%
Minimum capital required, amount	$ 303,621	$ 269,244
Minimum capital required, ratio	7.00%	7.00%
Well capitalized, amount	$ 281,934	$ 250,012
Well capitalized, ratio	6.50%	6.50%
Tier 1 Capital to Risk-Weighted Assets
Actual, amount	$ 508,826	$ 416,175
Actual, ratio	11.73%	10.82%
Minimum capital required, amount	$ 368,683	$ 326,940
Minimum capital required, ratio	8.50%	8.50%
Well capitalized, amount	$ 346,996	$ 307,708
Well capitalized, ratio	8.00%	8.00%
Total Capital to Risk-Weighted Assets
Actual, amount	$ 544,477	$ 455,274
Actual, ratio	12.55%	11.84%
Minimum capital required, amount	$ 455,430	$ 403,748
Minimum capital required, ratio	10.50%	10.50%
Well capitalized, amount	$ 433,743	$ 384,522
Well capitalized, ratio	10.00%	10.00%
Leverage Ratio
Actual, amount	$ 508,826	$ 416,175
Actual, ratio	10.81%	10.13%
Minimum capital required, amount	$ 188,229	$ 164,334
Minimum capital required, ratio	4.00%	4.00%
Well capitalized, amount	$ 235,287	$ 205,418
Well capitalized, ratio	5.00%	5.00%
Aggregate dividends without prior regulatory approval	$ 53,700

Commitments and Contingencies -

Commitments and Contingencies - Off-Balance Sheet Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Commitments to extend credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet financial instrument	$ 1,178,735	$ 1,068,088
Standby letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Off-balance sheet financial instrument	$ 46,860	$ 79,893

Commitments and Contingencies_2

Commitments and Contingencies - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Credit card guarantees	$ 772	$ 1,000
FHLB letters of credit	172,000	185,000
Lending-related Commitments
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Reserve for lending related commitments	$ 1,400	$ 2,000

Related Party Transactions - Lo

Related Party Transactions - Loans to Executive Officers, Directors, and Their Affiliates (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Notes Receivable, Related Parties [Roll Forward]
Effect of changes in composition of related parties	$ (8,536)	$ 0
Executive Officers, Directors, and their Affiliates
Notes Receivable, Related Parties [Roll Forward]
Balance, beginning of year	9,934	11,754
Advances	1,775	4,354
Principal repayments	(1,845)	(6,174)
Balance, end of year	1,328	9,934
Commitments to extend credit	$ 3,420	$ 12,355

Related Party Transactions - Na

Related Party Transactions - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Related Party Transactions [Abstract]
Deposits from related parties	$ 30.3	$ 38

Business Combinations (Details)

Business Combinations (Details) - USD ($) $ / shares in Units, $ in Thousands	Jul. 01, 2018	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Goodwill		$ 26,741	$ 22,192
DH Reeves, LLC
Business Acquisition [Line Items]
Total consideration	$ 9,500
Number of shares issued (in shares)	66,824
Share issue price ($ per share)	$ 40.50
Cash paid for acquisition	$ 6,800
Goodwill	4,500	4,500
Intangible assets acquired	$ 4,900	$ 4,900

Condensed Parent Company Only_3

Condensed Parent Company Only Financial Statements - Condensed Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Assets
Cash and cash equivalents	$ 116,678	$ 187,187	$ 259,883	$ 276,222
Other assets	83,768	83,878
Total assets	4,821,576	4,153,995
Liabilities and Stockholders' Equity
Junior subordinated debentures, net	9,644	9,619
Accrued expenses and other liabilities	33,791	32,663
Total liabilities	4,271,797	3,698,653
Retirement Plan-owned (formerly ESOP) shares	0	34,991
Stockholders' Equity
Common stock	118,633	97,594
Additional paid‑in capital	242,041	146,061
Retained earnings	191,585	145,122
Accumulated other comprehensive income	(2,480)	1,307
Total stockholders' equity	549,779	455,342
Less: Retirement Plan-owned (formerly ESOP) shares	0	34,991
Total stockholders' equity	549,779	420,351	420,093	372,933	[1]
Total liabilities and stockholders' equity	4,821,576	4,153,995
Origin Bancorp, Inc.
Assets
Cash and cash equivalents	5,882	10,566	$ 7,550	$ 5,907
Investment in affiliates/subsidiaries	543,515	450,598
Other assets	10,393	5,500
Total assets	559,790	466,664
Liabilities and Stockholders' Equity
Junior subordinated debentures, net	9,644	9,619
Accrued expenses and other liabilities	367	1,703
Total liabilities	10,011	11,322
Retirement Plan-owned (formerly ESOP) shares	0	34,991
Stockholders' Equity
Preferred stock	0	65,258
Common stock	118,633	97,594
Additional paid‑in capital	242,041	146,061
Retained earnings	191,585	145,122
Accumulated other comprehensive income	(2,480)	1,307
Total stockholders' equity	549,779	455,342
Less: Retirement Plan-owned (formerly ESOP) shares	0	34,991
Total stockholders' equity	549,779	420,351
Total liabilities and stockholders' equity	$ 559,790	$ 466,664
[1]	Presentation for 2016 beginning share and per share amounts has been adjusted to reflect a 2-for-1 stock split that occurred on October 5, 2016.

Condensed Parent Company Only_4

Condensed Parent Company Only Financial Statements - Condensed Statements of Income (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Expenses:
Salaries and employee benefits									$ 80,487	$ 70,862	$ 63,605
Other									5,290	4,275	5,758
Total noninterest expense	$ 35,023	$ 34,344	$ 32,012	$ 29,857	$ 31,771	$ 40,443	$ 30,674	$ 27,786	131,236	130,674	116,707
Income (loss) before income taxes	15,903	14,886	15,462	16,191	10,920	(4,861)	4,596	9,827	62,442	20,482	15,766
Income tax benefit	(2,725)	(2,568)	(2,760)	(2,784)	(5,148)	2,688	(773)	(2,580)	(10,837)	(5,813)	(2,916)
Net income (loss)	$ 13,178	$ 12,318	$ 12,702	$ 13,407	$ 5,772	$ (2,173)	$ 3,823	$ 7,247	51,605	14,669	12,850
Origin Bancorp, Inc.
Income:
Dividends from subsidiaries									4,500	8,000	5,625
Other									2,052	41	11
Total income									6,552	8,041	5,636
Expenses:
Salaries and employee benefits									658	433	600
Other									2,015	1,384	1,617
Total noninterest expense									2,673	1,817	2,217
Income (loss) before income taxes									3,879	6,224	3,419
Income tax benefit									84	477	1,281
Income before equity in undistributed net income of subsidiaries									3,963	6,701	4,700
Equity in undistributed net income of subsidiaries									47,642	7,968	8,150
Net income (loss)									$ 51,605	$ 14,669	$ 12,850

Condensed Parent Company Only_5

Condensed Parent Company Only Financial Statements - Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net income	$ 13,178	$ 12,318	$ 12,702	$ 13,407	$ 5,772	$ (2,173)	$ 3,823	$ 7,247	$ 51,605	$ 14,669	$ 12,850
Adjustments to reconcile net income to net cash provided by operating activities:
Deferred income taxes									5,637	4,931	1,400
Amortization of subordinated debentures discount									1,138	1,416	1,347
Stock compensation									1,462	1,150	1,547
Other, net									9,057	6,487	774
Net cash provided by operating activities									77,826	61,988	54,578
Cash flows from investing activities:
Net purchases of non-marketable equity securities held in other financial institutions									(17,026)	(3,199)	(318)
Net cash used in investing activities									(764,927)	(197,650)	(154,705)
Cash flows from financing activities:
Dividends paid									(5,941)	(6,996)	(5,764)
Taxes paid related to net share settlement of equity awards									(25)	(348)	(739)
Cash received on exercise of stock options									559	123	737
Proceeds from issuance of common stock									95,178	0	41,809
Payment to repurchase preferred stock									(48,260)	0	0
Net cash provided by (used by) financing activities									616,592	62,966	83,788
Net (decrease) increase in cash and cash equivalents									(70,509)	(72,696)	(16,339)
Cash and cash equivalents at beginning of period				187,187				259,883	187,187	259,883	276,222
Cash and cash equivalents at end of period	116,678				187,187				116,678	187,187	259,883
Origin Bancorp, Inc.
Cash flows from operating activities:
Net income									51,605	14,669	12,850
Adjustments to reconcile net income to net cash provided by operating activities:
Deferred income taxes									9	11	9
Equity in undistributed net income of subsidiaries									(47,642)	(7,968)	(8,150)
Amortization of subordinated debentures discount									25	23	21
Stock compensation									356	78	65
Other, net									(2,543)	5,488	215
Net cash provided by operating activities									1,810	12,301	5,010
Cash flows from investing activities:
Capital contributed to subsidiaries									(45,794)	0	(37,808)
Net purchases of non-marketable equity securities held in other financial institutions									(2,213)	(2,065)	0
Net cash used in investing activities									(48,007)	(2,065)	(37,808)
Cash flows from financing activities:
Net decrease in short-term borrowings									0	0	(3,600)
Dividends paid									(5,941)	(6,996)	(5,764)
Taxes paid related to net share settlement of equity awards									(23)	(410)	(739)
Cash received on exercise of stock options									559	186	737
Proceeds from issuance of common stock									95,178	0	41,809
Payment to repurchase preferred stock									(48,260)	0	1,998
Net cash provided by (used by) financing activities									41,513	(7,220)	34,441
Net (decrease) increase in cash and cash equivalents									(4,684)	3,016	1,643
Cash and cash equivalents at beginning of period				$ 10,566				$ 7,550	10,566	7,550	5,907
Cash and cash equivalents at end of period	$ 5,882				$ 10,566				$ 5,882	$ 10,566	$ 7,550

Summary of Quarterly Financia_3

Summary of Quarterly Financial Statements (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Total interest income	$ 53,058	$ 48,842	$ 44,752	$ 41,444	$ 40,408	$ 39,614	$ 37,293	$ 35,278	$ 188,096	$ 152,593	$ 139,151
Total interest expense	10,997	9,345	7,582	6,720	6,190	5,746	5,376	4,976	34,644	22,288	18,468
Net interest income	42,061	39,497	37,170	34,724	34,218	33,868	31,917	30,302	153,452	130,305	120,683
Provision for credit losses	1,723	504	311	(1,524)	242	3,327	1,953	2,814	1,014	8,336	30,078
Net interest income after provision for credit losses	40,338	38,993	36,859	36,248	33,976	30,541	29,964	27,488	152,438	121,969	90,605
Non-interest income, exclusive of (loss) gain on sales of securities, net	10,596	10,237	10,615	9,800	8,715	5,041	5,306	10,125
(Loss) gain on sales of securities, net	(8)	0	0	0					(8)	0	136
Non-interest expense	35,023	34,344	32,012	29,857	31,771	40,443	30,674	27,786	131,236	130,674	116,707
Income (loss) before income taxes	15,903	14,886	15,462	16,191	10,920	(4,861)	4,596	9,827	62,442	20,482	15,766
Income tax expense	2,725	2,568	2,760	2,784	5,148	(2,688)	773	2,580	10,837	5,813	2,916
Net income (loss)	13,178	12,318	12,702	13,407	5,772	(2,173)	3,823	7,247	51,605	14,669	12,850
Less preferred stock dividends	0	0	808	1,115	1,116	1,115	1,115	1,115	1,923	4,461	4,398
Less income allocated to participating stockholders	86	54	40	553	194	3	103	267	1,029	377	316
Net income available to common stockholders	$ 13,092	$ 12,264	$ 11,854	$ 11,739	$ 4,462	$ (3,291)	$ 2,605	$ 5,865	$ 48,653	$ 9,831	$ 8,136
Basic earnings (loss) per common share ($ per share)	$ 0.56	$ 0.52	$ 0.54	$ 0.60	$ 0.23	$ (0.17)	$ 0.13	$ 0.30	$ 2.21	$ 0.51	$ 0.46
Diluted earnings (loss) per common share ($ per share)	$ 0.55	$ 0.52	$ 0.53	$ 0.60	$ 0.23	$ (0.17)	$ 0.13	$ 0.30	$ 2.20	$ 0.50	$ 0.46

Uncategorized Items - obnk-2018

Label	Element	Value
AOCI Attributable to Parent [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 282,000
Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ (282,000)