Altabancorp (ALTA) 10-Q 9 Nov 18 2018 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Oct. 31, 2018
Document And Entity Information [Abstract]
Entity Registrant Name	People's Utah Bancorp
Entity Central Index Key	1,636,286
Document Type	10-Q
Document Period End Date	Sep. 30, 2018
Amendment Flag	false
Document Fiscal Year Focus	2,018
Trading Symbol	PUB
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Common Stock, Shares Outstanding		18,719,496

UNAUDITED CONSOLIDATED BALANCE

UNAUDITED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Cash and cash equivalents:
Cash and due from banks	$ 27,231	$ 36,235
Interest bearing deposits	23,005	13,158
Federal funds sold	4,697	1,634
Total cash and cash equivalents	54,933	51,027
Investment securities:
Available-for-sale, at fair value	255,021	263,056
Held-to-maturity, at historical cost	67,148	74,654
Total investment securities	322,169	337,710
Non-marketable equity securities	4,231	3,706
Loans held for sale	8,467	10,871
Loans:
Loans held for investment	1,718,403	1,627,444
Allowance for loan losses	(23,309)	(18,303)
Total loans held for investment, net	1,695,094	1,609,141
Premises and equipment, net	36,683	30,399
Goodwill	25,673	26,008
Bank-owned life insurance	26,276	23,566
Deferred income tax assets, net	11,224	8,827
Accrued interest receivable	8,766	7,594
Other intangibles	3,523	3,854
Other real estate owned	2,985	994
Other assets	12,829	9,832
Total assets	2,212,853	2,123,529
Deposits:
Non-interest bearing deposits	677,379	641,124
Interest bearing deposits	1,194,553	1,173,508
Total deposits	1,871,932	1,814,632
Short-term borrowings	42,000	40,000
Accrued interest payable	424	353
Other liabilities	18,865	11,126
Total liabilities	1,933,221	1,866,111
Shareholders’ equity:
Preferred shares, $0.01 par value: 3,000,000 shares authorized, no shares issued
Common shares, $0.01 par value: 30,000,000 shares authorized; 18,683,883 and 18,511,797 shares issued and outstanding as of June 30, 2018 and December 31, 2017, respectively	187	185
Additional paid-in capital	86,098	84,532
Retained earnings	199,161	174,804
Accumulated other comprehensive loss	(5,814)	(2,103)
Total shareholders’ equity	279,632	257,418
Total liabilities and shareholders’ equity	$ 2,212,853	$ 2,123,529

UNAUDITED CONSOLIDATED BALANC_2

UNAUDITED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Sep. 30, 2018	Dec. 31, 2017
Statement Of Financial Position [Abstract]
Preferred shares, par value	$ 0.01	$ 0.01
Preferred shares, authorized	3,000,000	3,000,000
Preferred shares, issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	30,000,000	30,000,000
Common stock, shares issued	18,719,496	18,511,797
Common stock, shares outstanding	18,719,496	18,511,797

UNAUDITED CONSOLIDATED STATEMEN

UNAUDITED CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Interest income
Interest and fees on loans	$ 27,420	$ 18,843	$ 80,276	$ 53,610
Interest and dividends on investments	1,679	1,820	5,018	5,327
Total interest income	29,099	20,663	85,294	58,937
Interest expense	1,917	754	5,190	2,269
Net interest income	27,182	19,909	80,104	56,668
Provision for loan losses	1,925	900	5,450	2,000
Net interest income after provision for loan losses	25,257	19,009	74,654	54,668
Non-interest income
Mortgage banking	1,668	1,686	4,811	5,625
Card processing	826	704	2,347	1,991
Service charges on deposit accounts	737	636	2,114	1,750
Net gain (loss) on sale of investment securities		(486)	336	(499)
Other	563	500	1,970	1,602
Total non-interest income	3,794	3,040	11,578	10,469
Non-interest expense
Salaries and employee benefits	9,885	8,813	30,504	24,542
Occupancy, equipment and depreciation	1,476	1,164	4,430	3,369
Data processing	890	650	2,823	1,986
Marketing and advertising	342	343	1,109	954
FDIC premiums	239	135	867	391
Acquisition-related costs	(118)	484	232	660
Other	2,566	1,525	7,186	4,961
Total non-interest expense	15,280	13,114	47,151	36,863
Income before income tax expense	13,771	8,935	39,081	28,274
Income tax expense	3,288	2,697	9,127	9,021
Net income	$ 10,483	$ 6,238	$ 29,954	$ 19,253
Earnings per common share:
Basic	$ 0.56	$ 0.35	$ 1.60	$ 1.07
Diluted	$ 0.55	$ 0.34	$ 1.58	$ 1.05
Weighted average common shares outstanding:
Basic	18,713,410	17,976,066	18,664,339	17,933,010
Diluted	19,010,600	18,396,664	18,979,405	18,355,136

UNAUDITED CONSOLIDATED STATEM_2

UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 10,483	$ 6,238	$ 29,954	$ 19,253
Other comprehensive income / (loss)
Unrealized holding (losses)/gains on securities available-for-sale	(1,161)	349	(4,948)	787
Income tax benefit/(expense)	290	(133)	1,237	(301)
Unrealized holding (losses)/gains on securities available-for-sale, net of tax	(871)	216	(3,711)	486
Total comprehensive income	$ 9,612	$ 6,454	$ 26,243	$ 19,739

UNAUDITED CONSOLIDATED STATEM_3

UNAUDITED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Shares	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Balance, beginning at Dec. 31, 2016	$ 228,517	$ 178	$ 68,657	$ 160,692	$ (1,010)
Balance, beginning, Shares at Dec. 31, 2016		17,819,538
Comprehensive income	19,739			19,253	486
Cash dividends	(4,483)			(4,483)
Share-based compensation	382		382
Exercise of stock options	1,270	$ 2	1,268
Exercise of stock options, Shares		203,113
Balance, ending at Sep. 30, 2017	245,425	$ 180	70,307	175,462	(524)
Balance, ending, Shares at Sep. 30, 2017		18,022,651
Balance, beginning at Dec. 31, 2017	$ 257,418	$ 185	84,532	174,804	(2,103)
Balance, beginning, Shares at Dec. 31, 2017	18,511,797	18,511,797
Comprehensive income	$ 26,243			29,954	(3,711)
Cash dividends	(5,597)			(5,597)
Share-based compensation	683		683
Exercise of stock options	885	$ 2	883
Exercise of stock options, Shares		207,699
Balance, ending at Sep. 30, 2018	$ 279,632	$ 187	$ 86,098	$ 199,161	$ (5,814)
Balance, ending, Shares at Sep. 30, 2018	18,719,496	18,719,496

UNAUDITED CONSOLIDATED STATEM_4

UNAUDITED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Statement Of Stockholders Equity [Abstract]
Cash dividends per share	$ 0.30	$ 0.25

UNAUDITED CONSOLIDATED STATEM_5

UNAUDITED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income	$ 29,954	$ 19,253
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	5,450	2,000
Depreciation and amortization	2,401	1,926
Deferred income taxes	(1,160)	(736)
Net amortization of securities discounts and premiums	1,991	2,188
Increase in cash surrender value of bank-owned life insurance	(460)	(382)
Share-based compensation	683	382
Gain on sale of loans held for sale	(3,099)	(4,061)
Originations of loans held for sale	(162,308)	(172,397)
Proceeds from sale of loans held for sale	167,811	186,542
Net changes in:
Accrued interest receivable	(1,172)	(629)
Other assets	(2,546)	(1,071)
Accrued interest payable	71	(46)
Other liabilities	7,739	3,612
Net cash provided by operating activities	45,355	36,581
Cash flows from investing activities:
Net change in loans held for investment	(93,643)	(97,227)
Purchase of available-for-sale securities	(30,832)	(24,599)
Purchase of held-to-maturity securities		(12,198)
Proceeds from maturities/sales of available-for-sale securities	32,504	132,578
Proceeds from maturities of held-to-maturity securities	6,930	9,323
Purchase of bank-owned life insurance	(2,250)
Purchase of premises and equipment	(8,659)	(6,137)
Proceeds from sale of other real estate owned, net of improvements	438	270
Net change of non-marketable equity securities	(525)	(132)
Net cash (used in) provided by investing activities	(96,037)	1,878
Cash flows from financing activities:
Net increase in deposits	57,300	103,107
Proceeds related to exercise of stock options	885	1,270
Net change in short-term borrowings	2,000	574
Cash dividends paid	(5,597)	(4,483)
Net cash provided by financing activities	54,588	100,468
Net change in cash and cash equivalents	3,906	138,927
Cash and cash equivalents, beginning of period	51,027	67,938
Cash and cash equivalents, end of period	54,933	206,865
Supplemental disclosures of cash flow information:
Cash paid for interest	5,119	2,315
Income taxes paid	11,032	10,724
Supplemental disclosures of non-cash investing transactions:
Reclassifications from loans to other real estate owned	2,985	425
Unrealized (losses) / gains on securities available-for-sale	(4,948)	$ 787
Measurement period adjustment to goodwill	$ (335)

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2018
Basis Of Presentation [Abstract]
Basis of Presentation	Note 1 — Basis of Presentation Nature of operations and basis of consolidation — People’s Utah Bancorp, Inc. (“PUB” or the “Company”) is a Utah corporation headquartered in American Fork, Utah. The Company operates all business activities through its wholly-owned banking subsidiary, People’s Intermountain Bank (“PIB” or the “Bank”), which was organized in 1913. The Bank is a Utah state chartered bank. The Bank operates under the jurisdiction of the Utah Department of Financial Institutions, and its deposits are insured by the Federal Deposit Insurance Corporation (“FDIC”). The Bank is not a member of the Federal Reserve System; however, PUB is operated as a bank holding company under the Federal Bank Holding Company Act of 1956 and is the sole shareholder of the Bank. Both PUB and the Bank are subject to periodic examination by applicable federal and state regulatory agencies and file periodic reports and other information with the agencies. PIB is a community bank that provides highly personalized retail and commercial banking products and services to small and medium sized businesses and individuals. Products and services are offered primarily through 26 retail branches located throughout Utah and southern Idaho. PIB has three banking divisions, Bank of American Fork, Lewiston State Bank, and People’s Town & Country Bank; a leasing division, GrowthFunding Equipment Finance; and a mortgage division, People’s Intermountain Bank Mortgage. The Bank offers a full range of short-term to long-term commercial, personal and mortgage loans. Commercial loans include both secured and unsecured loans for working capital (including inventory and accounts receivable), business expansion (including acquisition of real estate and improvements), and purchase of equipment and machinery. Consumer loans include secured and unsecured loans to finance automobiles, home improvements, education, and personal investments. The Bank also offers mortgage loans secured by personal residences. The Bank offers a full range of deposit services typically available in most financial institutions, including checking accounts, savings accounts, and time deposits. The Bank solicits these accounts from individuals, businesses, associations and organizations, and governmental entities. The interim condensed consolidated financial statements include the accounts of the Company together with its subsidiary Bank. All intercompany transactions and balances have been eliminated. The accompanying unaudited interim condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial information. In the opinion of management, the interim statements reflect all adjustments necessary for a fair presentation of the financial position, results of operations and cash flows of the Company on a consolidated basis and all such adjustments are of a normal recurring nature. These financial statements and the accompanying notes should be read in conjunction with the Company’s audited financial statements for the year ended December 31, 2017, which are included in the Company’s 2017 Form 10-K. Operating results for the three months and nine months ended September 30, 2018 are not necessarily indicative of the results that may be expected for the year ending December 31, 2018, or any other period. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reported period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change in the near term relate to the determination of the allowance for loan losses, the valuation of real estate acquired through foreclosure, deferred tax assets, and share-based compensation. Earnings per share — Basic earnings per common share represents income available to common shareholders divided by the weighted-average number of common shares outstanding during the period. Diluted earnings per share reflect additional common shares that would have been outstanding if dilutive potential common shares had been issued. Potential common shares include shares that may be issued by the Company for outstanding stock options determined using the treasury stock method and for all outstanding restricted stock units (“RSU”). Note 1 — Basis of Presentation – Continued Earnings per common share have been computed based on the following: Three Months Ended Nine Months Ended September 30, September 30, (Dollars in thousands, except share and per share data) 2018 2017 2018 2017 Numerator Net income $ 10,483 $ 6,238 $ 29,954 $ 19,253 Denominator Weighted-average number of common shares outstanding 18,713,410 17,976,066 18,664,339 17,933,010 Incremental shares assumed for stock options and RSUs 297,190 420,598 315,066 422,126 Weighted-average number of dilutive shares outstanding 19,010,600 18,396,664 18,979,405 18,355,136 Basic earnings per common share $ 0.56 $ 0.35 $ 1.60 $ 1.07 Diluted earnings per common share $ 0.55 $ 0.34 $ 1.58 $ 1.05 Reclassifications — Certain amounts in the prior period’s financial statements have been reclassified to conform to the current period’s presentation. Impact of Recent Authoritative Accounting Guidance —The Accounting Standards Codification™ (“ASC”) is the Financial Accounting Standards Board’s (“FASB”) officially recognized source of authoritative GAAP applicable to all public and non-public non-governmental entities. Periodically, the FASB will issue Accounting Standard Updates (“ASU”) to its ASC. Rules and interpretive releases of the SEC under the authority of the federal securities laws are also sources of authoritative GAAP for us as an SEC registrant. All other accounting literature is non-authoritative. In March 2017, FASB issued ASU 2017-08, "Receivables-Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities." The ASU requires entities to amortize the premium on certain purchased callable debt securities to the earliest call date, which more closely aligns the amortization period of premiums and discounts to expectations incorporated in the market prices. Entities will no longer recognize a loss in earnings upon the debtor's exercise of a call on a purchased debt security held at a premium. The ASU does not require any accounting change for debt securities held at a discount; therefore the discount will continue to be amortized as an adjustment of yield over the contractual life of the investment. This ASU is effective for interim and annual reporting periods beginning after December 15, 2018. Early adoption is permitted for all entities. The adoption of ASU No. 2017-08 is not expected to have a material impact on the Company's Consolidated Financial Statements. In June 2016, the FASB issued ASU No. 2016-13, "Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments." The ASU significantly changes the impairment model for most financial assets that are measured at amortized cost and certain other instruments from an incurred loss model to an expected loss model. This ASU is effective for interim and annual reporting periods beginning after December 15, 2019. Early adoption is permitted for all entities beginning after December 15, 2018, including interim periods within those fiscal years. The Company is in the process of identifying required changes to the loan loss estimation models and processes and evaluating the impact of this new guidance. Once adopted, we expect our allowance for loan losses to increase. However, until our evaluation is complete, the magnitude of the increase will be unknown. In February 2016, the FASB issued ASU 2016-02, "Leases (ASC 842)." The guidance in this ASU requires most leases to be recognized on the balance sheet as a right-of-use asset and a lease liability. It will be critical to identify leases embedded in a contract to avoid misstating the lessee’s balance sheet. For income statement purposes, the FASB retained a dual model, requiring leases to be classified as either operating or finance. Classification will be based on criteria that are largely similar to those applied in current lease accounting, but without explicit bright lines. This ASU is effective for interim and annual periods beginning after December 15, 2018. We are currently evaluating the impact of this guidance on our Consolidated Financial Statements and the timing of adoption. The Company will compile an inventory of all leased assets to determine the impact of ASU 2016-02 on its financial condition and results of operations. Once adopted, we expect to report higher assets and liabilities on our Consolidated Balance Sheets as a result of including right-of-use assets and lease liabilities related to certain banking offices and certain equipment under noncancelable operating lease agreements, which currently are not reflected in our Consolidated Balance Sheets. We do not expect the guidance to have a material impact on the Consolidated Statements of Income or the Consolidated Statements of Changes in Shareholders’ Equity. Note 1 — Basis of Presentation – Continued In August 2015, the FASB issued ASU No. 2015-14, “Revenue from Contracts with Customers (Topic 606)”, which defers the effective date of Accounting Standard Update ASU No. 2014-09 one year. ASU No. 2014-09 created Topic 606 and supersedes Topic 605, Revenue Recognition. The core principle of Topic 606 is that an entity recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In general, the new guidance requires companies to use more judgment and make more estimates than under current guidance, including identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. In May 2016, the FASB issued ASU No. 2016-12, Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements and Practical Expedients, which provides clarifying guidance in certain narrow areas and adds some practical expedients, but does not change the core revenue recognition principle in Topic 606. ASU No. 2015-14 is effective for interim and annual periods beginning after December 15, 2017. For financial reporting purposes, the standard allows for either full retrospective adoption, meaning the standard is applied to all of the periods presented, or modified retrospective adoption, meaning the standard is applied only to the most current period presented in the financial statements with the cumulative effect of initially applying the standard recognized at the date of initial application. The Company adopted this standard on January 1, 2018 using the full retrospective method. A significant amount of the Company’s revenues are derived from net interest income on financial assets and liabilities, which are excluded from the scope of the amended guidance. Revenue streams reported as deposit fees and other service charges, which include transaction based deposit fees, and interchange fees on credit and debit cards, are within the scope of Topic 606. The Company completed its assessment of revenue streams and associated incremental costs of contracts affected by the standard. The Company’s adoption of this standard did not change the timing or the amount of revenue recognized in prior periods. However, the presentation of certain costs associated with card processing will now be offset against card processing revenue in non-interest income. The change in presentation resulted in $1.8 million of expenses for the nine months ended September 30, 2018 being netted against card processing income and reported in non-interest income instead of as payment and card processing expenses in non-interest expense. In addition, to conform to the current period presentation, $1.6 million of card processing related expenses for the nine months ended September 30, 2017, were reclassified from payment and card processing expense in non-interest expense to being netted against card processing revenue in non-interest income. The Company elected to apply the practical expedient and therefore does not disclose information about remaining performance obligations that have an original expected term of one year or less and allows the Company to expense costs related to obtaining a contract as incurred when the amortization period would have been one year or less. The following table presents the impact of adopting of the new revenue standard on our Statements of Income for the nine months ended September 30, 2018 and 2017: Nine Months Ended Nine Months Ended September 30, 2018 September 30, 2017 Balance without Balance without (Dollars in thousands, except share and per share data) As Reported Adoption of ASC 606 Effect of Change As Reported Adoption of ASC 606 Effect of Change Non-interest income Card Processing $ 2,347 $ 4,177 $ (1,830 ) $ 1,991 $ 3,579 $ (1,588 ) Service charges on deposit accounts 2,114 2,114 - 1,750 1,750 - Non-interest Expense Card Processing $ - $ 1,830 $ (1,830 ) $ - $ 1,588 $ (1,588 )

Investment Securities

Investment Securities	9 Months Ended
	Sep. 30, 2018
Investments Debt And Equity Securities [Abstract]
Investment Securities	Note 2 — Investment Securities Amortized cost and estimated fair value of investment securities available-for-sale are summarized as follows: Gross Unrealized Losses Less 12 Gross Than Months Amortized Unrealized 12 or Fair (Dollars in thousands) Cost Gains Months Longer Value As of September 30, 2018 U.S. Government-sponsored securities $ 48,954 $ - $ (418 ) $ (561 ) $ 47,975 Municipal securities 11,341 68 (66 ) (41 ) 11,302 Mortgage-backed securities 197,478 19 (2,615 ) (3,914 ) 190,968 Corporate securities 5,000 - (6 ) (218 ) 4,776 $ 262,773 $ 87 $ (3,105 ) $ (4,734 ) $ 255,021 As of December 31, 2017 U.S. Government-sponsored securities $ 48,950 $ 13 $ (6 ) $ (453 ) $ 48,504 Municipal securities 13,310 184 (22 ) (18 ) 13,454 Mortgage-backed securities 198,100 71 (1,145 ) (1,764 ) 195,262 Corporate securities 5,500 573 - (237 ) 5,836 $ 265,860 $ 841 $ (1,173 ) $ (2,472 ) $ 263,056 Amortized cost and estimated fair value of investment securities held-to-maturity are as follows: Gross Unrealized Losses Less 12 Gross Than Months Amortized Unrealized 12 or Fair (Dollars in thousands) Cost Gains Months Longer Value As of September 30, 2018 Municipal securities $ 67,148 $ 10 $ (656 ) $ (452 ) $ 66,050 As of December 31, 2017 Municipal securities $ 74,654 $ 167 $ (293 ) $ (227 ) $ 74,301 Note 2 — Investment Securities – continued At September 30, 2018 and December 31, 2017, the gross unrealized losses and the fair value for securities available-for-sale and held-to-maturity was as follows: September 30, 2018 Less Than 12 Months 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized (Dollars in thousands) Value Losses Value Losses Value Losses Available-for-Sale U.S. Government-sponsored securities $ 14,537 $ (418 ) $ 33,437 $ (561 ) $ 47,974 $ (979 ) Municipal securities 4,319 (66 ) 1,558 (41 ) 5,877 (107 ) Mortgage-backed securities 90,052 (2,615 ) 99,170 (3,914 ) 189,222 (6,529 ) Corporate securities 1,994 (6 ) 2,782 (218 ) 4,776 (224 ) $ 110,902 $ (3,105 ) $ 136,947 $ (4,734 ) $ 247,849 $ (7,839 ) Held-to Maturity Municipal securities $ 42,342 $ (656 ) $ 16,359 $ (452 ) $ 58,701 $ (1,108 ) December 31, 2017 Less Than 12 Months 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized (Dollars in thousands) Value Losses Value Losses Value Losses Available-for-Sale U.S. Government-sponsored securities $ 5,087 $ (6 ) $ 33,543 $ (453 ) $ 38,630 $ (459 ) Municipal securities 3,523 (22 ) 830 (18 ) 4,353 (40 ) Mortgage-backed securities 112,878 (1,145 ) 72,859 (1,764 ) 185,737 (2,909 ) Corporate securities - - 4,763 (237 ) 4,763 (237 ) $ 121,488 $ (1,173 ) $ 111,995 $ (2,472 ) $ 233,483 $ (3,645 ) Held-to Maturity Municipal securities $ 39,380 $ (293 ) $ 10,389 $ (227 ) $ 49,769 $ (520 ) The amortized cost and estimated fair value of investment securities that are available-for-sale and held-to-maturity at September 30, 2018, by contractual maturity, are as follows: Available-For-Sale Held-To-Maturity Amortized Fair Amortized Fair (Dollars in thousands) Cost Value Cost Value Securities maturing in: One year or less $ 13,314 $ 13,181 $ 9,876 $ 9,851 After one year through five years 64,991 63,569 37,334 36,900 After five years through ten years 49,367 47,589 14,859 14,360 After ten years 135,101 130,682 5,079 4,939 $ 262,773 $ 255,021 $ 67,148 $ 66,050 Actual maturities may differ from contractual maturities because issuers may have the right to call obligations with or without penalties and other securities may experience pre-payments. As of September 30, 2018, the Company held 336 investment securities with fair value less than amortized cost compared to 304 at December 31, 2017. Management evaluated these investment securities and determined that the decline in value is temporary and related to the change in market interest rates since purchase. The decline in value is not related to any company or industry specific event. The Company anticipates full recovery of the amortized cost with respect to these securities at maturity, or sooner in the event of a more favorable market interest rate environment. Note 2 — Investment Securities – continued The Company had sales of available-for-sale securities totaling $500,000 during the nine months ended September 30, 2018, which resulted in a net gain of $336,000 compared with $126.2 million during the nine months ended September 30, 2017, which resulted in a net loss of $486,000. There were no available-for-sale securities in a nonaccrual status at September 30, 2018 or December 31, 2017. The Company had no sales of held-to-maturity securities during the nine months ended September 30, 2018, compared to $204,000 during the nine months ended September 30, 2017, which resulted in a net loss of $13,000. The company had no held-to-maturity securities in a nonaccrual status at September 30, 2018 or December 31, 2017.

Loans and Allowance for Loan Lo

Loans and Allowance for Loan Losses	9 Months Ended
	Sep. 30, 2018
Receivables [Abstract]
Loans and Allowance for Loan Losses	Note 3 — Loans and Allowance for Loan Losses Loans are summarized as follows: September 30, December 31, (Dollars in thousands) 2018 2017 Loans held for investment: Commercial real estate loans: Real estate term $ 856,247 $ 784,148 Construction and land development 382,254 369,590 Total commercial real estate loans 1,238,501 1,153,738 Commercial and industrial loans 314,395 294,085 Consumer loans: Residential and home equity 153,406 158,591 Consumer and other 16,597 25,591 Total consumer loans 170,003 184,182 Total gross loans 1,722,899 1,632,005 Net deferred loan fees (4,496 ) (4,561 ) Total loans held for investment 1,718,403 1,627,444 Allowance for loan losses (23,309 ) (18,303 ) Total loans held for investment, net $ 1,695,094 $ 1,609,141 Changes in the allowance for loan losses (“ALLL”) are as follows: Three Months Ended September 30, 2018 Real Construction Commercial Residential Consumer Estate and Land and and and (Dollars in thousands) Term Development Industrial Home Equity Other Total Balance at beginning of period $ 9,028 $ 6,789 $ 5,780 $ 659 $ 52 $ 22,308 Additions: Provisions for loan losses 469 892 455 14 95 1,925 Deductions: Gross loan charge-offs (294 ) - (945 ) - (105 ) (1,344 ) Recoveries 46 6 312 2 54 420 Net loan (charge-offs) / recoveries (248 ) 6 (633 ) 2 (51 ) (924 ) Balance at end of period $ 9,249 $ 7,687 $ 5,602 $ 675 $ 96 $ 23,309 Note 3 — Loans and Allowance for Loan Losses – Continued Three Months Ended September 30, 2017 Real Construction Commercial Residential Consumer Estate and Land and and and (Dollars in thousands) Term Development Industrial Home Equity Other Total Balance at beginning of period $ 7,157 $ 5,077 $ 4,489 $ 503 $ 45 $ 17,271 Additions: Provisions for loan losses (303 ) 409 770 (44 ) 68 900 Deductions: Gross loan charge-offs - - (621 ) - (46 ) (667 ) Recoveries 23 2 46 7 27 105 Net loan (charge-offs) / recoveries 23 2 (575 ) 7 (19 ) (562 ) Balance at end of period $ 6,877 $ 5,488 $ 4,684 $ 466 $ 94 $ 17,609 Nine Months Ended September 30, 2018 Real Construction Commercial Residential Consumer Estate and Land and and and (Dollars in thousands) Term Development Industrial Home Equity Other Total Balance at beginning of period $ 6,706 $ 6,309 $ 4,314 $ 815 $ 159 $ 18,303 Additions: Provisions for loan losses 2,779 1,301 1,522 (223 ) 71 5,450 Deductions: Gross loan charge-offs (294 ) - (1,235 ) - (277 ) (1,806 ) Recoveries 58 77 1,001 83 143 1,362 Net loan (charge-offs) / recoveries (236 ) 77 (234 ) 83 (134 ) (444 ) Balance at end of period $ 9,249 $ 7,687 $ 5,602 $ 675 $ 96 $ 23,309 Nine Months Ended September 30, 2017 Real Construction Commercial Residential Consumer Estate and Land and and and (Dollars in thousands) Term Development Industrial Home Equity Other Total Balance at beginning of period $ 6,770 $ 5,449 $ 3,718 $ 617 $ 161 $ 16,715 Additions: Provisions for loan losses 253 (42 ) 1,736 40 13 2,000 Deductions: Gross loan charge-offs (350 ) - (893 ) (338 ) (159 ) (1,740 ) Recoveries 204 81 123 147 79 634 Net loan (charge-offs) / recoveries (146 ) 81 (770 ) (191 ) (80 ) (1,106 ) Balance at end of period $ 6,877 $ 5,488 $ 4,684 $ 466 $ 94 $ 17,609 Note 3 — Loans and Allowance for Loan Losses – Continued Non-accrual loans are summarized as follows: September 30, December 31, (Dollars in thousands) 2018 2017 Non-accrual loans, not troubled debt restructured: Real estate term $ 310 $ - Construction and land development 98 - Commercial and industrial 1,455 223 Residential and home equity - - Consumer and other 5 - Total non-accrual loans, not troubled debt restructured 1,868 223 Troubled debt restructured loans, non-accrual: Real estate term 1,495 - Construction and land development - - Commercial and industrial 169 - Residential and home equity - - Consumer and other - - Total troubled debt restructured loans, non-accrual 1,664 - Total non-accrual loans $ 3,532 $ 223 Troubled debt restructured loans are summarized as follows: September 30, December 31, (Dollars in thousands) 2018 2017 Accruing troubled debt restructured loans $ 2,423 $ 3,307 Non-accrual troubled debt restructured loans 1,664 - Total troubled debt restructured loans $ 4,087 $ 3,307 A restructured loan is considered a troubled debt restructured loan (“TDR”), if the Company, for economic or legal reasons related to the debtor’s financial difficulties, grants a concession in terms or a below-market interest rate to the debtor that it would not otherwise consider. Each TDR loan is separately negotiated with the borrower and includes terms and conditions that reflect the borrower’s prospective ability to service the debt as modified. Loans totaling $4.1 million were classified as TDR’s during the nine months ended September 30, 2018. No new TDRs occurred during the nine months ended September 30, 2018. In addition, there were no TDRs which incurred a payment default within twelve months of the restructure date during the nine-month periods ended September 30, 2018 and 2017. Current and past due loans held for investment (accruing and non-accruing) are summarized as follows: September 30, 2018 Purchased 30-89 Days 90+ Days Non- Total Credit Total (Dollars in thousands) Current Past Due Past Due accrual Past Due Impaired Loans Commercial real estate: Real estate term $ 850,094 $ 1,040 $ - $ 1,805 $ 2,845 $ 3,308 $ 856,247 Construction and land development 380,306 1,517 - 98 1,615 333 382,254 Total commercial real estate 1,230,400 2,557 - 1,903 4,460 3,641 1,238,501 Commercial and industrial 307,873 2,346 - 1,624 3,970 2,552 314,395 Consumer: Residential and home equity 152,518 888 - - 888 - 153,406 Consumer and other 16,355 220 17 5 242 - 16,597 Total consumer 168,873 1,108 17 5 1,130 - 170,003 Total gross loans $ 1,707,146 $ 6,011 $ 17 $ 3,532 $ 9,560 $ 6,193 $ 1,722,899 Note 3 — Loans and Allowance for Loan Losses – Continued December 31, 2017 Purchased 30-89 Days 90+ Days Non- Total Credit Total (Dollars in thousands) Current Past Due Past Due accrual Past Due Impaired Loans Commercial real estate: Real estate term $ 777,746 $ 2,243 $ - $ - $ 2,243 $ 4,159 $ 784,148 Construction and land development 361,847 7,095 - - 7,095 648 369,590 Total commercial real estate 1,139,593 9,338 - - 9,338 4,807 1,153,738 Commercial and industrial 285,785 4,210 - 223 4,433 3,867 294,085 Consumer: Residential and home equity 156,379 2,212 - - 2,212 - 158,591 Consumer and other 25,307 283 1 - 284 - 25,591 Total consumer 181,686 2,495 1 - 2,496 - 184,182 Total gross loans $ 1,607,064 $ 16,043 $ 1 $ 223 $ 16,267 $ 8,674 $ 1,632,005 Credit Quality Indicators: In addition to past due and non-accrual criteria, the Company also analyzes loans using a loan grading system. Performance-based grading follows the Company’s definitions of Pass, Special Mention, Substandard and Doubtful, which are consistent with published definitions of regulatory risk classifications. Definitions of Pass, Special Mention, Substandard, and Doubtful are summarized as follows: Pass : A Pass asset is higher quality and does not fit any of the other categories described below. The likelihood of loss is considered remote. Special Mention : A Special Mention asset has potential weaknesses that may be temporary or, if left uncorrected, may result in a loss. While concerns exist, the Company is currently protected and loss is considered unlikely and not imminent. Substandard : A Substandard asset is inadequately protected by the current sound net worth and paying capacity of the obligor or of the collateral pledged, if any. Assets so classified have well defined weaknesses and are characterized by the distinct possibility that the Company may sustain some loss if deficiencies are not corrected. Doubtful : A Doubtful asset has all the weaknesses inherent in a Substandard asset with the added characteristics that the weaknesses make collection or liquidation in full highly questionable. For Consumer loans, the Company generally assigns internal risk grades similar to those described above based on payment performance. Outstanding loan balances (accruing and non-accruing) categorized by these credit quality indicators are summarized as follows: September 30, 2018 Special Total Total (Dollars in thousands) Pass Mention Substandard Doubtful Loans Allowance Commercial real estate: Real estate term $ 827,297 $ 17,896 $ 11,054 $ - $ 856,247 $ 9,249 Construction and land development 378,895 1,596 1,763 - 382,254 7,687 Total commercial real estate 1,206,192 19,492 12,817 - 1,238,501 16,936 Commercial and industrial 295,243 6,186 12,966 - 314,395 5,602 Consumer loans: Residential and home equity 149,310 1,701 2,395 - 153,406 675 Consumer and other 16,543 27 27 - 16,597 96 Total consumer 165,853 1,728 2,422 - 170,003 771 Total $ 1,667,288 $ 27,406 $ 28,205 $ - $ 1,722,899 $ 23,309 Note 3 — Loans and Allowance for Loan Losses – Continued December 31, 2017 Special Total Total (Dollars in thousands) Pass Mention Substandard Doubtful Loans Allowance Commercial real estate: Real estate term $ 758,575 $ 13,055 $ 12,518 $ - $ 784,148 $ 6,706 Construction and land development 358,766 7,227 3,597 - 369,590 6,309 Total commercial real estate 1,117,341 20,282 16,115 - 1,153,738 13,015 Commercial and industrial 274,535 13,464 6,086 - 294,085 4,314 Consumer loans: Residential and home equity 152,753 3,913 1,925 - 158,591 815 Consumer and other 25,461 45 72 13 25,591 159 Total consumer 178,214 3,958 1,997 13 184,182 974 Total $ 1,570,090 $ 37,704 $ 24,198 $ 13 $ 1,632,005 $ 18,303 The ALLL and outstanding loan balances reviewed according to the Company’s impairment method are summarized as follows: September 30, 2018 Real Construction Commercial Residential Consumer Estate and Land and and and (Dollars in thousands) Term Development Industrial Home Equity Other Total Allowance for loan losses: Individually evaluated for impairment $ - $ - $ 279 $ - $ - $ 279 Collectively evaluated for impairment 9,249 7,687 5,323 675 96 23,030 Purchased credit-impaired loans - - - - - - Total $ 9,249 $ 7,687 $ 5,602 $ 675 $ 96 $ 23,309 Outstanding loan balances: Individually evaluated for impairment $ 4,355 $ 1,441 $ 11,564 $ 2,112 $ - $ 19,472 Collectively evaluated for impairment 848,584 380,480 300,279 151,294 16,597 1,697,234 Purchased credit-impaired loans 3,308 333 2,552 - - 6,193 Total gross loans $ 856,247 $ 382,254 $ 314,395 $ 153,406 $ 16,597 $ 1,722,899 December 31, 2017 Real Construction Commercial Residential Consumer Estate and Land and and and (Dollars in thousands) Term Development Industrial Home Equity Other Total Allowance for loan losses: Individually evaluated for impairment $ - $ 3 $ 41 $ 101 $ - $ 145 Collectively evaluated for impairment 6,706 6,306 4,273 714 159 18,158 Purchased credit-impaired loans - - - - - - Total $ 6,706 $ 6,309 $ 4,314 $ 815 $ 159 $ 18,303 Outstanding loan balances: Individually evaluated for impairment $ 6,191 $ 2,568 $ 2,044 $ 1,150 $ - $ 11,953 Collectively evaluated for impairment 773,798 366,374 288,174 157,441 25,591 1,611,378 Purchased credit-impaired loans 4,159 648 3,867 - - 8,674 Total gross loans $ 784,148 $ 369,590 $ 294,085 $ 158,591 $ 25,591 $ 1,632,005 Note 3 — Loans and Allowance for Loan Losses – Continued Information on impaired loans, excluding Purchased Credit Impaired (“PCI”) loans, is summarized as follows: September 30, 2018 Recorded Investment Unpaid Total Principal With No With Recorded Related (Dollars in thousands) Balance Allowance Allowance Investment Allowance Commercial real estate: Real estate term $ 7,607 $ 4,355 $ - $ 4,355 $ - Construction and land development 2,194 1,441 - 1,441 - Total commercial real estate 9,801 5,796 - 5,796 - Commercial and industrial 14,523 9,723 1,841 11,564 279 Consumer loans: Residential and home equity 2,112 2,112 - 2,112 - Consumer and other - - - - - Total consumer 2,112 2,112 - 2,112 - Total $ 26,436 $ 17,631 $ 1,841 $ 19,472 $ 279 December 31, 2017 Recorded Investment Unpaid Total Principal With No With Recorded Related (Dollars in thousands) Balance Allowance Allowance Investment Allowance Commercial real estate: Real estate term $ 7,090 $ 6,191 $ - $ 6,191 $ - Construction and land development 3,485 2,372 196 2,568 3 Total commercial real estate 10,575 8,563 196 8,759 3 Commercial and industrial 6,204 1,276 768 2,044 41 Consumer loans: Residential and home equity 1,150 229 921 1,150 101 Consumer and other - - - - - Total consumer 1,150 229 921 1,150 101 Total $ 17,929 $ 10,068 $ 1,885 $ 11,953 $ 145 The interest income recognized on impaired loans was as follows: Three Months Ended September 30, 2018 September 30, 2017 Average Interest Average Interest Recorded Income Recorded Income (Dollars in thousands) Investment Recognition Investment Recognition Commercial real estate: Real estate term $ 10,127 $ 111 $ 6,648 $ 100 Construction and land development 1,043 16 1,880 73 Total commercial real estate 11,170 127 8,528 173 Commercial and industrial 10,049 140 4,659 103 Consumer loans: Residential and home equity 2,728 33 1,052 26 Consumer and other - - - - Total consumer 2,728 33 1,052 26 Total $ 23,947 $ 300 $ 14,239 $ 302 Note 3 — Loans and Allowance for Loan Losses – Continued Nine Months Ended September 30, 2018 September 30, 2017 Average Interest Average Interest Recorded Income Recorded Income (Dollars in thousands) Investment Recognition Investment Recognition Commercial real estate: Real estate term $ 8,366 $ 257 $ 5,765 $ 118 Construction and land development 1,716 90 2,397 104 Total commercial real estate 10,082 347 8,162 222 Commercial and industrial 7,198 268 4,464 148 Consumer loans: Residential and home equity 2,175 76 1,054 37 Consumer and other - - - - Total consumer 2,175 76 1,054 37 Total $ 19,455 $ 691 $ 13,680 $ 407 Purchased credit-impaired loans and purchased non-credit-impaired loans . Purchased loans, including loans acquired in business combinations, are recorded at their fair value at the acquisition date. Credit discounts are included in the determination of fair value; therefore, an allowance for loan and lease losses is not recorded at the acquisition date. Acquired loans are evaluated upon acquisition and classified as either purchased credit-impaired (PCI) or purchased non-credit-impaired. PCI loans reflect credit deterioration since origination such that it is probable at acquisition that the Company will be unable to collect all contractually required payments. The outstanding contractual unpaid principal balance of PCI loans, excluding acquisition accounting adjustments, was $9.2 million at September 30, 2018 and $12.4 million at December 31, 2017. The carrying balance of PCI loans was $6.2 million at September 30, 2018 and $8.7 million at December 31, 2017. The following table presents the changes in the accretable yield for PCI loans for the nine months ended September 30, 2018, and 2017: Nine Months Ended September 30, (Dollars in thousands) 2018 2017 Balance, beginning of period $ 8,536 $ 573 Accretion to interest income (2,165 ) (38 ) Reclassification from non-accretable difference 189 9 Balance, end of period $ 6,560 $ 544 As of September 30, 2018 and December 31, 2017, the non-accretable difference between the contractually required payments and cash flows expected to be collected were $3.0 million and $3.7 million, respectively. Loans and Deposits to affiliates — The Company has entered into loan transactions with certain directors, affiliated companies and executive committee members (“affiliates”). Such transactions were made in the ordinary course of business on substantially the same terms and conditions, including interest rates and collateral, as those prevailing at the same time for comparable transactions with other customers, and did not, in the opinion of management, involve more than normal credit risk or present other unfavorable features. Total outstanding loans with affiliates were approximately $4.3 million and $3.4 million as of September 30, 2018, and December 31, 2017, respectively. Available lines of credit for loans and credit cards to affiliates were approximately $1.3 million and $330,000 as of September 30, 2018, and December 31, 2017, respectively. Deposits from affiliates were $8.8 million and $7.1 million as of September 30, 2018 and December 31, 2017, respectively.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2018
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 4 — Commitments and Contingencies Litigation contingencies — The Company is involved in various claims, legal actions and complaints which arise in the ordinary course of business. In the Company’s opinion, all such matters are adequately covered by insurance, are without merit or are of such kind, or involve such amounts, that unfavorable disposition would not have a material adverse effect on the financial condition or results of operations of the Company. Commitments to extend credit — In the normal course of business, the Company has outstanding commitments and contingent liabilities, such as commitments to extend credit and unused credit card lines, which are not included in the accompanying consolidated financial statements. The Company’s exposure to credit loss in the event of non-performance by other parties to the financial instruments for commitments to extend credit and unused credit card lines is represented by the contractual or notional amount of those instruments. The Company uses the same credit policies in making such commitments as it does for instruments that are included in the consolidated balance sheets. Contractual amounts of off-balance sheet financial instruments were as follows: September 30, December 31, (Dollars in thousands) 2018 2017 Commitments to extend credit, including unsecured commitments of $17,912 and $13,625 as of September 30, 2018 and December 31, 2017, respectively $ 582,174 $ 637,029 Stand-by letters of credit and bond commitments, including unsecured commitments of $474 and $440 as of September 30, 2018 and December 31, 2017, respectively 26,013 27,943 Unused credit card lines, all unsecured 25,096 24,949 Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. The commitments to extend credit may expire without being drawn upon. Therefore, the total commitment amounts do not necessarily represent future cash requirements. The amount of collateral obtained, if it is deemed necessary by the Company, is based on management’s credit evaluation of the customer. Unused credit card lines are commitments for possible future extensions of credit to existing customers. These lines of credit are uncollateralized and usually do not contain a specified maturity date and may not be drawn upon to the total extent to which the Company is committed.

Fair Value

Fair Value	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value	Note 5 — Fair Value The Company measures and discloses certain assets and liabilities at fair value. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (that is, not a forced liquidation or distressed sale). GAAP establishes a consistent framework for measuring fair value and disclosure requirements about fair value measurements. Among other things, the standard requires us to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect the Company’s estimates for market assumptions. These two types of inputs create the following fair value hierarchy: • Level 1 • Level 2 • Level 3 Note 5 — Fair Value - Continued The estimated fair value amounts of financial instruments have been determined by the Company using available market information and appropriate valuation methodologies. However, considerable judgment is required to interpret data to develop the estimates of fair value. Accordingly, the estimates presented herein are not necessarily indicative of the amounts the Company could realize at a future date. The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts. In addition, reasonable comparability between financial institutions may not be likely due to the wide range of permitted valuation techniques and numerous estimates that must be made given the absence of active secondary markets for many of the financial instruments. This lack of uniform valuation methodologies also introduces a greater degree of subjectivity to these estimated fair values. Transfers between levels of the fair value hierarchy are deemed to occur at the end of the reporting period. The following methods were used to estimate the fair value of each class of financial instruments: Cash and cash equivalents : The carrying amount of these items is a reasonable estimate of their fair value. Securities : The estimated fair values of investment securities are priced using current active market quotes, if available, which are considered Level 1 measurements. For most of the portfolio, matrix pricing based on the securities’ relationship to other benchmark quoted prices is used to establish the fair value. These measurements are considered Level 2. Non-marketable securities : The fair value is based upon the redemption value of the stock, which equates to its carrying value. Loans Held for Sale : The carrying amount of these items is a reasonable estimate of their fair value. Loans held for investment : The fair value is estimated by discounting the future cash flows and estimated prepayments using the current rates at which similar loans would be made to borrowers with similar credit ratings and for the same remaining term. Some loan types fair value approximated carrying value because of their floating rate or expected maturity characteristics. Bank-owned life insurance : The fair value of BOLI policies owned is based on the various insurance contracts' cash surrender value. Deposits : The carrying amount of deposits with no stated maturity, such as savings and checking accounts, is a reasonable estimate of their fair value. The market value of certificates of deposit is based upon the discounted value of contractual cash flows. The discount rate is determined using the rates currently offered on comparable instruments. Short-term borrowings : Short-term borrowing are overnight advances with the FHLB and their carrying amount is considered a reasonable approximation of their fair value. The following table presents estimated fair values of the Company’s financial instruments as of September 30, 2018 and December 31, 2017: September 30, 2018 December 31, 2017 Carrying Estimated Carrying Estimated (Dollars in thousands) Level Value Fair Value Value Fair Value Financial Assets: Cash and cash equivalents 1 $ 54,933 $ 54,933 $ 51,027 $ 51,027 Investment securities available-for-sale 2 255,021 255,021 263,056 263,056 Investment securities held-to-maturity 2 67,148 66,050 74,654 74,301 Non-marketable securities 2 4,231 4,231 3,706 3,706 Loans held for sale 2 8,467 8,467 10,871 10,871 Loans held for investment 3 1,695,094 1,692,440 1,609,141 1,607,388 Bank-owned life insurance 1 26,276 26,276 23,566 23,566 Financial Liabilities: Total deposits 2 $ 1,871,932 $ 1,580,894 $ 1,814,632 $ 1,596,966 Short-term borrowings 2 42,000 42,000 40,000 40,000 Note 5 — Fair Value - Continued Assets measured on a recurring and non-recurring basis are as follows: (Dollars in thousands) Level 1 Level 2 Level 3 Total As of September 30, 2018 Fair valued on a recurring basis: Investment securities available-for-sale $ - $ 255,021 $ - $ 255,021 Fair valued on a non-recurring basis: Impaired loans - - 1,562 1,562 As of December 31, 2017 Fair valued on a recurring basis: Investment securities available-for-sale $ - $ 263,056 $ - $ 263,056 Fair valued on a non-recurring basis: Impaired loans - - 1,740 1,740

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Note 6 — Income Taxes Income tax expense was $3.3 million and $2.7 million for the three months ended September 30, 2018 and 2017, respectively. The Company’s effective tax rate for the third quarter of 2018 was 23.9% compared with 30.2% in the third quarter of 2017. The tax rate in the third quarter of 2018 is lower than the same quarter in 2017 due primarily to the reduction in the federal corporate tax rate to a flat rate of 21%, the reduction of the Utah state corporate tax rate to 4.95% as well as tax benefits related to tax-deductible stock compensation expense.

Regulatory Capital Matters

Regulatory Capital Matters	9 Months Ended
	Sep. 30, 2018
Banking And Thrift [Abstract]
Regulatory Capital Matters	Note 7 — Regulatory Capital Matters The consolidated Tier 1 Leverage ratio increased to 11.90% as of September 30, 2018 from 11.46% at December 31, 2017. Federal Reserve Board Regulations require maintenance of certain minimum reserve balances based on certain average deposits, which, as of September 30, 2018 and December 31, 2017, were $16.3 million and $19.0 million, respectively. The Company’s Board of Directors may declare a cash or stock dividend out of retained earnings provided the regulatory minimum capital ratios are met. The Company plans to maintain capital ratios that meet the well-capitalized standards per the regulations and, therefore, plans to limit dividends to amounts that are appropriate to maintain those well-capitalized regulatory capital ratios.

Incentive Share-Based Plan and

Incentive Share-Based Plan and Other Employee Benefits	9 Months Ended
	Sep. 30, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Incentive Share-Based Plan and Other Employee Benefits	Note 8 — Incentive Share-Based Plan and Other Employee Benefits In June 2014, the Board of Directors (“Board”) and shareholders of the Company approved a share-based incentive plan (“the Plan”). The Plan provides for various share-based incentive awards including incentive share-based options, non-qualified share-based options, restricted shares, and stock appreciation rights to be granted to officers, directors and other key employees. The maximum aggregate number of shares that may be issued under the Plan is 800,000 common shares. The share-based awards are granted to participants under the Plan at a price not less than the fair value on the date of grant and for terms of up to ten years. The Plan also allows for granting of share-based awards to directors and consultants who are not employees of the Company. During the nine months ended September 30, 2018, the Company granted options for the purchase of 33,382 common shares, which have a weighted average exercise price of $32.31 per share and a weighted average fair value as of the date of grant of $3.58 per share. Additionally, the Company granted 32,128 restricted stock units (“RSU”) at a weighted-average fair value of $31.03 per unit. The options and RSU’s generally vest over periods from one to three years. The Company recorded share-based compensation expense of $683,000 and $382,000 for the nine months ended September 30, 2018 and 2017, respectively.

Acquisition Related Measurement

Acquisition Related Measurement Period Adjustments	9 Months Ended
	Sep. 30, 2018
Business Combinations [Abstract]
Acquisition Related Measurement Period Adjustments	Note 9 — Acquisition Related Measurement Period Adjustments During the nine months ended September 30, 2018, the Company made acquisition related measurement period adjustments of $335,000. Changes to initially estimated fair values from a business combination are recognized as an adjustment to goodwill over the measurement period, which cannot exceed one year from the acquisition date. The adjustments to goodwill related to changes in the preliminary goodwill recorded for the acquisition of Town & Country Bank and were related to loan valuations.

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2018
Basis Of Presentation [Abstract]
Nature of Operations and Basis of Consolidation	Nature of operations and basis of consolidation — People’s Utah Bancorp, Inc. (“PUB” or the “Company”) is a Utah corporation headquartered in American Fork, Utah. The Company operates all business activities through its wholly-owned banking subsidiary, People’s Intermountain Bank (“PIB” or the “Bank”), which was organized in 1913. The Bank is a Utah state chartered bank. The Bank operates under the jurisdiction of the Utah Department of Financial Institutions, and its deposits are insured by the Federal Deposit Insurance Corporation (“FDIC”). The Bank is not a member of the Federal Reserve System; however, PUB is operated as a bank holding company under the Federal Bank Holding Company Act of 1956 and is the sole shareholder of the Bank. Both PUB and the Bank are subject to periodic examination by applicable federal and state regulatory agencies and file periodic reports and other information with the agencies. PIB is a community bank that provides highly personalized retail and commercial banking products and services to small and medium sized businesses and individuals. Products and services are offered primarily through 26 retail branches located throughout Utah and southern Idaho. PIB has three banking divisions, Bank of American Fork, Lewiston State Bank, and People’s Town & Country Bank; a leasing division, GrowthFunding Equipment Finance; and a mortgage division, People’s Intermountain Bank Mortgage. The Bank offers a full range of short-term to long-term commercial, personal and mortgage loans. Commercial loans include both secured and unsecured loans for working capital (including inventory and accounts receivable), business expansion (including acquisition of real estate and improvements), and purchase of equipment and machinery. Consumer loans include secured and unsecured loans to finance automobiles, home improvements, education, and personal investments. The Bank also offers mortgage loans secured by personal residences. The Bank offers a full range of deposit services typically available in most financial institutions, including checking accounts, savings accounts, and time deposits. The Bank solicits these accounts from individuals, businesses, associations and organizations, and governmental entities. The interim condensed consolidated financial statements include the accounts of the Company together with its subsidiary Bank. All intercompany transactions and balances have been eliminated. The accompanying unaudited interim condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial information. In the opinion of management, the interim statements reflect all adjustments necessary for a fair presentation of the financial position, results of operations and cash flows of the Company on a consolidated basis and all such adjustments are of a normal recurring nature. These financial statements and the accompanying notes should be read in conjunction with the Company’s audited financial statements for the year ended December 31, 2017, which are included in the Company’s 2017 Form 10-K. Operating results for the three months and nine months ended September 30, 2018 are not necessarily indicative of the results that may be expected for the year ending December 31, 2018, or any other period. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reported period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change in the near term relate to the determination of the allowance for loan losses, the valuation of real estate acquired through foreclosure, deferred tax assets, and share-based compensation.
Earnings Per Share	Earnings per share — Basic earnings per common share represents income available to common shareholders divided by the weighted-average number of common shares outstanding during the period. Diluted earnings per share reflect additional common shares that would have been outstanding if dilutive potential common shares had been issued. Potential common shares include shares that may be issued by the Company for outstanding stock options determined using the treasury stock method and for all outstanding restricted stock units (“RSU”). Note 1 — Basis of Presentation – Continued Earnings per common share have been computed based on the following: Three Months Ended Nine Months Ended September 30, September 30, (Dollars in thousands, except share and per share data) 2018 2017 2018 2017 Numerator Net income $ 10,483 $ 6,238 $ 29,954 $ 19,253 Denominator Weighted-average number of common shares outstanding 18,713,410 17,976,066 18,664,339 17,933,010 Incremental shares assumed for stock options and RSUs 297,190 420,598 315,066 422,126 Weighted-average number of dilutive shares outstanding 19,010,600 18,396,664 18,979,405 18,355,136 Basic earnings per common share $ 0.56 $ 0.35 $ 1.60 $ 1.07 Diluted earnings per common share $ 0.55 $ 0.34 $ 1.58 $ 1.05
Reclassifications	Reclassifications — Certain amounts in the prior period’s financial statements have been reclassified to conform to the current period’s presentation.
Impact of Recent Authoritative Accounting Guidance	Impact of Recent Authoritative Accounting Guidance —The Accounting Standards Codification™ (“ASC”) is the Financial Accounting Standards Board’s (“FASB”) officially recognized source of authoritative GAAP applicable to all public and non-public non-governmental entities. Periodically, the FASB will issue Accounting Standard Updates (“ASU”) to its ASC. Rules and interpretive releases of the SEC under the authority of the federal securities laws are also sources of authoritative GAAP for us as an SEC registrant. All other accounting literature is non-authoritative. In March 2017, FASB issued ASU 2017-08, "Receivables-Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities." The ASU requires entities to amortize the premium on certain purchased callable debt securities to the earliest call date, which more closely aligns the amortization period of premiums and discounts to expectations incorporated in the market prices. Entities will no longer recognize a loss in earnings upon the debtor's exercise of a call on a purchased debt security held at a premium. The ASU does not require any accounting change for debt securities held at a discount; therefore the discount will continue to be amortized as an adjustment of yield over the contractual life of the investment. This ASU is effective for interim and annual reporting periods beginning after December 15, 2018. Early adoption is permitted for all entities. The adoption of ASU No. 2017-08 is not expected to have a material impact on the Company's Consolidated Financial Statements. In June 2016, the FASB issued ASU No. 2016-13, "Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments." The ASU significantly changes the impairment model for most financial assets that are measured at amortized cost and certain other instruments from an incurred loss model to an expected loss model. This ASU is effective for interim and annual reporting periods beginning after December 15, 2019. Early adoption is permitted for all entities beginning after December 15, 2018, including interim periods within those fiscal years. The Company is in the process of identifying required changes to the loan loss estimation models and processes and evaluating the impact of this new guidance. Once adopted, we expect our allowance for loan losses to increase. However, until our evaluation is complete, the magnitude of the increase will be unknown. In February 2016, the FASB issued ASU 2016-02, "Leases (ASC 842)." The guidance in this ASU requires most leases to be recognized on the balance sheet as a right-of-use asset and a lease liability. It will be critical to identify leases embedded in a contract to avoid misstating the lessee’s balance sheet. For income statement purposes, the FASB retained a dual model, requiring leases to be classified as either operating or finance. Classification will be based on criteria that are largely similar to those applied in current lease accounting, but without explicit bright lines. This ASU is effective for interim and annual periods beginning after December 15, 2018. We are currently evaluating the impact of this guidance on our Consolidated Financial Statements and the timing of adoption. The Company will compile an inventory of all leased assets to determine the impact of ASU 2016-02 on its financial condition and results of operations. Once adopted, we expect to report higher assets and liabilities on our Consolidated Balance Sheets as a result of including right-of-use assets and lease liabilities related to certain banking offices and certain equipment under noncancelable operating lease agreements, which currently are not reflected in our Consolidated Balance Sheets. We do not expect the guidance to have a material impact on the Consolidated Statements of Income or the Consolidated Statements of Changes in Shareholders’ Equity. Note 1 — Basis of Presentation – Continued In August 2015, the FASB issued ASU No. 2015-14, “Revenue from Contracts with Customers (Topic 606)”, which defers the effective date of Accounting Standard Update ASU No. 2014-09 one year. ASU No. 2014-09 created Topic 606 and supersedes Topic 605, Revenue Recognition. The core principle of Topic 606 is that an entity recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In general, the new guidance requires companies to use more judgment and make more estimates than under current guidance, including identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation. In May 2016, the FASB issued ASU No. 2016-12, Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements and Practical Expedients, which provides clarifying guidance in certain narrow areas and adds some practical expedients, but does not change the core revenue recognition principle in Topic 606. ASU No. 2015-14 is effective for interim and annual periods beginning after December 15, 2017. For financial reporting purposes, the standard allows for either full retrospective adoption, meaning the standard is applied to all of the periods presented, or modified retrospective adoption, meaning the standard is applied only to the most current period presented in the financial statements with the cumulative effect of initially applying the standard recognized at the date of initial application. The Company adopted this standard on January 1, 2018 using the full retrospective method. A significant amount of the Company’s revenues are derived from net interest income on financial assets and liabilities, which are excluded from the scope of the amended guidance. Revenue streams reported as deposit fees and other service charges, which include transaction based deposit fees, and interchange fees on credit and debit cards, are within the scope of Topic 606. The Company completed its assessment of revenue streams and associated incremental costs of contracts affected by the standard. The Company’s adoption of this standard did not change the timing or the amount of revenue recognized in prior periods. However, the presentation of certain costs associated with card processing will now be offset against card processing revenue in non-interest income. The change in presentation resulted in $1.8 million of expenses for the nine months ended September 30, 2018 being netted against card processing income and reported in non-interest income instead of as payment and card processing expenses in non-interest expense. In addition, to conform to the current period presentation, $1.6 million of card processing related expenses for the nine months ended September 30, 2017, were reclassified from payment and card processing expense in non-interest expense to being netted against card processing revenue in non-interest income. The Company elected to apply the practical expedient and therefore does not disclose information about remaining performance obligations that have an original expected term of one year or less and allows the Company to expense costs related to obtaining a contract as incurred when the amortization period would have been one year or less. The following table presents the impact of adopting of the new revenue standard on our Statements of Income for the nine months ended September 30, 2018 and 2017: Nine Months Ended Nine Months Ended September 30, 2018 September 30, 2017 Balance without Balance without (Dollars in thousands, except share and per share data) As Reported Adoption of ASC 606 Effect of Change As Reported Adoption of ASC 606 Effect of Change Non-interest income Card Processing $ 2,347 $ 4,177 $ (1,830 ) $ 1,991 $ 3,579 $ (1,588 ) Service charges on deposit accounts 2,114 2,114 - 1,750 1,750 - Non-interest Expense Card Processing $ - $ 1,830 $ (1,830 ) $ - $ 1,588 $ (1,588 )

Basis of Presentation (Tables)

Basis of Presentation (Tables)	9 Months Ended
	Sep. 30, 2018
Basis Of Presentation [Abstract]
Schedule of Earnings Per Common Share	Earnings per common share have been computed based on the following: Three Months Ended Nine Months Ended September 30, September 30, (Dollars in thousands, except share and per share data) 2018 2017 2018 2017 Numerator Net income $ 10,483 $ 6,238 $ 29,954 $ 19,253 Denominator Weighted-average number of common shares outstanding 18,713,410 17,976,066 18,664,339 17,933,010 Incremental shares assumed for stock options and RSUs 297,190 420,598 315,066 422,126 Weighted-average number of dilutive shares outstanding 19,010,600 18,396,664 18,979,405 18,355,136 Basic earnings per common share $ 0.56 $ 0.35 $ 1.60 $ 1.07 Diluted earnings per common share $ 0.55 $ 0.34 $ 1.58 $ 1.05
Impact of Adopting New Revenue Standard on Statement of Income	The following table presents the impact of adopting of the new revenue standard on our Statements of Income for the nine months ended September 30, 2018 and 2017: Nine Months Ended Nine Months Ended September 30, 2018 September 30, 2017 Balance without Balance without (Dollars in thousands, except share and per share data) As Reported Adoption of ASC 606 Effect of Change As Reported Adoption of ASC 606 Effect of Change Non-interest income Card Processing $ 2,347 $ 4,177 $ (1,830 ) $ 1,991 $ 3,579 $ (1,588 ) Service charges on deposit accounts 2,114 2,114 - 1,750 1,750 - Non-interest Expense Card Processing $ - $ 1,830 $ (1,830 ) $ - $ 1,588 $ (1,588 )

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2018
Investments Debt And Equity Securities [Abstract]
Summary of Amortized Cost and Estimated Fair Value of Investment Securities Available for Sale	Amortized cost and estimated fair value of investment securities available-for-sale are summarized as follows: Gross Unrealized Losses Less 12 Gross Than Months Amortized Unrealized 12 or Fair (Dollars in thousands) Cost Gains Months Longer Value As of September 30, 2018 U.S. Government-sponsored securities $ 48,954 $ - $ (418 ) $ (561 ) $ 47,975 Municipal securities 11,341 68 (66 ) (41 ) 11,302 Mortgage-backed securities 197,478 19 (2,615 ) (3,914 ) 190,968 Corporate securities 5,000 - (6 ) (218 ) 4,776 $ 262,773 $ 87 $ (3,105 ) $ (4,734 ) $ 255,021 As of December 31, 2017 U.S. Government-sponsored securities $ 48,950 $ 13 $ (6 ) $ (453 ) $ 48,504 Municipal securities 13,310 184 (22 ) (18 ) 13,454 Mortgage-backed securities 198,100 71 (1,145 ) (1,764 ) 195,262 Corporate securities 5,500 573 - (237 ) 5,836 $ 265,860 $ 841 $ (1,173 ) $ (2,472 ) $ 263,056
Summary of Amortized Cost and Estimated Fair Value of Investment Securities Held-to-Maturity	Amortized cost and estimated fair value of investment securities held-to-maturity are as follows: Gross Unrealized Losses Less 12 Gross Than Months Amortized Unrealized 12 or Fair (Dollars in thousands) Cost Gains Months Longer Value As of September 30, 2018 Municipal securities $ 67,148 $ 10 $ (656 ) $ (452 ) $ 66,050 As of December 31, 2017 Municipal securities $ 74,654 $ 167 $ (293 ) $ (227 ) $ 74,301
Summary of Gross Unrealized Losses and Fair Value for Securities Available-for-Sale and Held-to-Maturity	At September 30, 2018 and December 31, 2017, the gross unrealized losses and the fair value for securities available-for-sale and held-to-maturity was as follows: September 30, 2018 Less Than 12 Months 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized (Dollars in thousands) Value Losses Value Losses Value Losses Available-for-Sale U.S. Government-sponsored securities $ 14,537 $ (418 ) $ 33,437 $ (561 ) $ 47,974 $ (979 ) Municipal securities 4,319 (66 ) 1,558 (41 ) 5,877 (107 ) Mortgage-backed securities 90,052 (2,615 ) 99,170 (3,914 ) 189,222 (6,529 ) Corporate securities 1,994 (6 ) 2,782 (218 ) 4,776 (224 ) $ 110,902 $ (3,105 ) $ 136,947 $ (4,734 ) $ 247,849 $ (7,839 ) Held-to Maturity Municipal securities $ 42,342 $ (656 ) $ 16,359 $ (452 ) $ 58,701 $ (1,108 ) December 31, 2017 Less Than 12 Months 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized (Dollars in thousands) Value Losses Value Losses Value Losses Available-for-Sale U.S. Government-sponsored securities $ 5,087 $ (6 ) $ 33,543 $ (453 ) $ 38,630 $ (459 ) Municipal securities 3,523 (22 ) 830 (18 ) 4,353 (40 ) Mortgage-backed securities 112,878 (1,145 ) 72,859 (1,764 ) 185,737 (2,909 ) Corporate securities - - 4,763 (237 ) 4,763 (237 ) $ 121,488 $ (1,173 ) $ 111,995 $ (2,472 ) $ 233,483 $ (3,645 ) Held-to Maturity Municipal securities $ 39,380 $ (293 ) $ 10,389 $ (227 ) $ 49,769 $ (520 )
Amortized Cost and Estimated Fair Value of Investment Securities that are Available-for-Sale and Held-to-Maturity by Contractual Maturity	The amortized cost and estimated fair value of investment securities that are available-for-sale and held-to-maturity at September 30, 2018, by contractual maturity, are as follows: Available-For-Sale Held-To-Maturity Amortized Fair Amortized Fair (Dollars in thousands) Cost Value Cost Value Securities maturing in: One year or less $ 13,314 $ 13,181 $ 9,876 $ 9,851 After one year through five years 64,991 63,569 37,334 36,900 After five years through ten years 49,367 47,589 14,859 14,360 After ten years 135,101 130,682 5,079 4,939 $ 262,773 $ 255,021 $ 67,148 $ 66,050

Loans and Allowance for Loan _2

Loans and Allowance for Loan Losses (Tables)	9 Months Ended
	Sep. 30, 2018
Receivables [Abstract]
Summary of Loans	Loans are summarized as follows: September 30, December 31, (Dollars in thousands) 2018 2017 Loans held for investment: Commercial real estate loans: Real estate term $ 856,247 $ 784,148 Construction and land development 382,254 369,590 Total commercial real estate loans 1,238,501 1,153,738 Commercial and industrial loans 314,395 294,085 Consumer loans: Residential and home equity 153,406 158,591 Consumer and other 16,597 25,591 Total consumer loans 170,003 184,182 Total gross loans 1,722,899 1,632,005 Net deferred loan fees (4,496 ) (4,561 ) Total loans held for investment 1,718,403 1,627,444 Allowance for loan losses (23,309 ) (18,303 ) Total loans held for investment, net $ 1,695,094 $ 1,609,141
Summary of Changes in Allowance for Loan Losses	Changes in the allowance for loan losses (“ALLL”) are as follows: Three Months Ended September 30, 2018 Real Construction Commercial Residential Consumer Estate and Land and and and (Dollars in thousands) Term Development Industrial Home Equity Other Total Balance at beginning of period $ 9,028 $ 6,789 $ 5,780 $ 659 $ 52 $ 22,308 Additions: Provisions for loan losses 469 892 455 14 95 1,925 Deductions: Gross loan charge-offs (294 ) - (945 ) - (105 ) (1,344 ) Recoveries 46 6 312 2 54 420 Net loan (charge-offs) / recoveries (248 ) 6 (633 ) 2 (51 ) (924 ) Balance at end of period $ 9,249 $ 7,687 $ 5,602 $ 675 $ 96 $ 23,309 Note 3 — Loans and Allowance for Loan Losses – Continued Three Months Ended September 30, 2017 Real Construction Commercial Residential Consumer Estate and Land and and and (Dollars in thousands) Term Development Industrial Home Equity Other Total Balance at beginning of period $ 7,157 $ 5,077 $ 4,489 $ 503 $ 45 $ 17,271 Additions: Provisions for loan losses (303 ) 409 770 (44 ) 68 900 Deductions: Gross loan charge-offs - - (621 ) - (46 ) (667 ) Recoveries 23 2 46 7 27 105 Net loan (charge-offs) / recoveries 23 2 (575 ) 7 (19 ) (562 ) Balance at end of period $ 6,877 $ 5,488 $ 4,684 $ 466 $ 94 $ 17,609 Nine Months Ended September 30, 2018 Real Construction Commercial Residential Consumer Estate and Land and and and (Dollars in thousands) Term Development Industrial Home Equity Other Total Balance at beginning of period $ 6,706 $ 6,309 $ 4,314 $ 815 $ 159 $ 18,303 Additions: Provisions for loan losses 2,779 1,301 1,522 (223 ) 71 5,450 Deductions: Gross loan charge-offs (294 ) - (1,235 ) - (277 ) (1,806 ) Recoveries 58 77 1,001 83 143 1,362 Net loan (charge-offs) / recoveries (236 ) 77 (234 ) 83 (134 ) (444 ) Balance at end of period $ 9,249 $ 7,687 $ 5,602 $ 675 $ 96 $ 23,309 Nine Months Ended September 30, 2017 Real Construction Commercial Residential Consumer Estate and Land and and and (Dollars in thousands) Term Development Industrial Home Equity Other Total Balance at beginning of period $ 6,770 $ 5,449 $ 3,718 $ 617 $ 161 $ 16,715 Additions: Provisions for loan losses 253 (42 ) 1,736 40 13 2,000 Deductions: Gross loan charge-offs (350 ) - (893 ) (338 ) (159 ) (1,740 ) Recoveries 204 81 123 147 79 634 Net loan (charge-offs) / recoveries (146 ) 81 (770 ) (191 ) (80 ) (1,106 ) Balance at end of period $ 6,877 $ 5,488 $ 4,684 $ 466 $ 94 $ 17,609
Summary of Nonaccrual Loans	Non-accrual loans are summarized as follows: September 30, December 31, (Dollars in thousands) 2018 2017 Non-accrual loans, not troubled debt restructured: Real estate term $ 310 $ - Construction and land development 98 - Commercial and industrial 1,455 223 Residential and home equity - - Consumer and other 5 - Total non-accrual loans, not troubled debt restructured 1,868 223 Troubled debt restructured loans, non-accrual: Real estate term 1,495 - Construction and land development - - Commercial and industrial 169 - Residential and home equity - - Consumer and other - - Total troubled debt restructured loans, non-accrual 1,664 - Total non-accrual loans $ 3,532 $ 223
Summary of Troubled Debt Restructured Loans	Troubled debt restructured loans are summarized as follows: September 30, December 31, (Dollars in thousands) 2018 2017 Accruing troubled debt restructured loans $ 2,423 $ 3,307 Non-accrual troubled debt restructured loans 1,664 - Total troubled debt restructured loans $ 4,087 $ 3,307
Summary of Current and Past Due Loans Held For Investment (Accruing And Non-Accruing)	Current and past due loans held for investment (accruing and non-accruing) are summarized as follows: September 30, 2018 Purchased 30-89 Days 90+ Days Non- Total Credit Total (Dollars in thousands) Current Past Due Past Due accrual Past Due Impaired Loans Commercial real estate: Real estate term $ 850,094 $ 1,040 $ - $ 1,805 $ 2,845 $ 3,308 $ 856,247 Construction and land development 380,306 1,517 - 98 1,615 333 382,254 Total commercial real estate 1,230,400 2,557 - 1,903 4,460 3,641 1,238,501 Commercial and industrial 307,873 2,346 - 1,624 3,970 2,552 314,395 Consumer: Residential and home equity 152,518 888 - - 888 - 153,406 Consumer and other 16,355 220 17 5 242 - 16,597 Total consumer 168,873 1,108 17 5 1,130 - 170,003 Total gross loans $ 1,707,146 $ 6,011 $ 17 $ 3,532 $ 9,560 $ 6,193 $ 1,722,899 Note 3 — Loans and Allowance for Loan Losses – Continued December 31, 2017 Purchased 30-89 Days 90+ Days Non- Total Credit Total (Dollars in thousands) Current Past Due Past Due accrual Past Due Impaired Loans Commercial real estate: Real estate term $ 777,746 $ 2,243 $ - $ - $ 2,243 $ 4,159 $ 784,148 Construction and land development 361,847 7,095 - - 7,095 648 369,590 Total commercial real estate 1,139,593 9,338 - - 9,338 4,807 1,153,738 Commercial and industrial 285,785 4,210 - 223 4,433 3,867 294,085 Consumer: Residential and home equity 156,379 2,212 - - 2,212 - 158,591 Consumer and other 25,307 283 1 - 284 - 25,591 Total consumer 181,686 2,495 1 - 2,496 - 184,182 Total gross loans $ 1,607,064 $ 16,043 $ 1 $ 223 $ 16,267 $ 8,674 $ 1,632,005
Summary of Outstanding Loan Balances (Accruing and Non - Accruing) Categorized by Credit Quality Indicators	Outstanding loan balances (accruing and non-accruing) categorized by these credit quality indicators are summarized as follows: September 30, 2018 Special Total Total (Dollars in thousands) Pass Mention Substandard Doubtful Loans Allowance Commercial real estate: Real estate term $ 827,297 $ 17,896 $ 11,054 $ - $ 856,247 $ 9,249 Construction and land development 378,895 1,596 1,763 - 382,254 7,687 Total commercial real estate 1,206,192 19,492 12,817 - 1,238,501 16,936 Commercial and industrial 295,243 6,186 12,966 - 314,395 5,602 Consumer loans: Residential and home equity 149,310 1,701 2,395 - 153,406 675 Consumer and other 16,543 27 27 - 16,597 96 Total consumer 165,853 1,728 2,422 - 170,003 771 Total $ 1,667,288 $ 27,406 $ 28,205 $ - $ 1,722,899 $ 23,309 Note 3 — Loans and Allowance for Loan Losses – Continued December 31, 2017 Special Total Total (Dollars in thousands) Pass Mention Substandard Doubtful Loans Allowance Commercial real estate: Real estate term $ 758,575 $ 13,055 $ 12,518 $ - $ 784,148 $ 6,706 Construction and land development 358,766 7,227 3,597 - 369,590 6,309 Total commercial real estate 1,117,341 20,282 16,115 - 1,153,738 13,015 Commercial and industrial 274,535 13,464 6,086 - 294,085 4,314 Consumer loans: Residential and home equity 152,753 3,913 1,925 - 158,591 815 Consumer and other 25,461 45 72 13 25,591 159 Total consumer 178,214 3,958 1,997 13 184,182 974 Total $ 1,570,090 $ 37,704 $ 24,198 $ 13 $ 1,632,005 $ 18,303
Summary of Information On Impaired Loans, Excluding Purchased Credit Impaired ("PCI") Loans	The ALLL and outstanding loan balances reviewed according to the Company’s impairment method are summarized as follows: September 30, 2018 Real Construction Commercial Residential Consumer Estate and Land and and and (Dollars in thousands) Term Development Industrial Home Equity Other Total Allowance for loan losses: Individually evaluated for impairment $ - $ - $ 279 $ - $ - $ 279 Collectively evaluated for impairment 9,249 7,687 5,323 675 96 23,030 Purchased credit-impaired loans - - - - - - Total $ 9,249 $ 7,687 $ 5,602 $ 675 $ 96 $ 23,309 Outstanding loan balances: Individually evaluated for impairment $ 4,355 $ 1,441 $ 11,564 $ 2,112 $ - $ 19,472 Collectively evaluated for impairment 848,584 380,480 300,279 151,294 16,597 1,697,234 Purchased credit-impaired loans 3,308 333 2,552 - - 6,193 Total gross loans $ 856,247 $ 382,254 $ 314,395 $ 153,406 $ 16,597 $ 1,722,899 December 31, 2017 Real Construction Commercial Residential Consumer Estate and Land and and and (Dollars in thousands) Term Development Industrial Home Equity Other Total Allowance for loan losses: Individually evaluated for impairment $ - $ 3 $ 41 $ 101 $ - $ 145 Collectively evaluated for impairment 6,706 6,306 4,273 714 159 18,158 Purchased credit-impaired loans - - - - - - Total $ 6,706 $ 6,309 $ 4,314 $ 815 $ 159 $ 18,303 Outstanding loan balances: Individually evaluated for impairment $ 6,191 $ 2,568 $ 2,044 $ 1,150 $ - $ 11,953 Collectively evaluated for impairment 773,798 366,374 288,174 157,441 25,591 1,611,378 Purchased credit-impaired loans 4,159 648 3,867 - - 8,674 Total gross loans $ 784,148 $ 369,590 $ 294,085 $ 158,591 $ 25,591 $ 1,632,005 Note 3 — Loans and Allowance for Loan Losses – Continued Information on impaired loans, excluding Purchased Credit Impaired (“PCI”) loans, is summarized as follows: September 30, 2018 Recorded Investment Unpaid Total Principal With No With Recorded Related (Dollars in thousands) Balance Allowance Allowance Investment Allowance Commercial real estate: Real estate term $ 7,607 $ 4,355 $ - $ 4,355 $ - Construction and land development 2,194 1,441 - 1,441 - Total commercial real estate 9,801 5,796 - 5,796 - Commercial and industrial 14,523 9,723 1,841 11,564 279 Consumer loans: Residential and home equity 2,112 2,112 - 2,112 - Consumer and other - - - - - Total consumer 2,112 2,112 - 2,112 - Total $ 26,436 $ 17,631 $ 1,841 $ 19,472 $ 279 December 31, 2017 Recorded Investment Unpaid Total Principal With No With Recorded Related (Dollars in thousands) Balance Allowance Allowance Investment Allowance Commercial real estate: Real estate term $ 7,090 $ 6,191 $ - $ 6,191 $ - Construction and land development 3,485 2,372 196 2,568 3 Total commercial real estate 10,575 8,563 196 8,759 3 Commercial and industrial 6,204 1,276 768 2,044 41 Consumer loans: Residential and home equity 1,150 229 921 1,150 101 Consumer and other - - - - - Total consumer 1,150 229 921 1,150 101 Total $ 17,929 $ 10,068 $ 1,885 $ 11,953 $ 145 The interest income recognized on impaired loans was as follows: Three Months Ended September 30, 2018 September 30, 2017 Average Interest Average Interest Recorded Income Recorded Income (Dollars in thousands) Investment Recognition Investment Recognition Commercial real estate: Real estate term $ 10,127 $ 111 $ 6,648 $ 100 Construction and land development 1,043 16 1,880 73 Total commercial real estate 11,170 127 8,528 173 Commercial and industrial 10,049 140 4,659 103 Consumer loans: Residential and home equity 2,728 33 1,052 26 Consumer and other - - - - Total consumer 2,728 33 1,052 26 Total $ 23,947 $ 300 $ 14,239 $ 302 Note 3 — Loans and Allowance for Loan Losses – Continued Nine Months Ended September 30, 2018 September 30, 2017 Average Interest Average Interest Recorded Income Recorded Income (Dollars in thousands) Investment Recognition Investment Recognition Commercial real estate: Real estate term $ 8,366 $ 257 $ 5,765 $ 118 Construction and land development 1,716 90 2,397 104 Total commercial real estate 10,082 347 8,162 222 Commercial and industrial 7,198 268 4,464 148 Consumer loans: Residential and home equity 2,175 76 1,054 37 Consumer and other - - - - Total consumer 2,175 76 1,054 37 Total $ 19,455 $ 691 $ 13,680 $ 407
Changes in Accretable Yield for PCI Loans	The following table presents the changes in the accretable yield for PCI loans for the nine months ended September 30, 2018, and 2017: Nine Months Ended September 30, (Dollars in thousands) 2018 2017 Balance, beginning of period $ 8,536 $ 573 Accretion to interest income (2,165 ) (38 ) Reclassification from non-accretable difference 189 9 Balance, end of period $ 6,560 $ 544

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2018
Commitments And Contingencies Disclosure [Abstract]
Summary of Contractual Amounts of Off-balance Sheet Financial Instruments	Contractual amounts of off-balance sheet financial instruments were as follows: September 30, December 31, (Dollars in thousands) 2018 2017 Commitments to extend credit, including unsecured commitments of $17,912 and $13,625 as of September 30, 2018 and December 31, 2017, respectively $ 582,174 $ 637,029 Stand-by letters of credit and bond commitments, including unsecured commitments of $474 and $440 as of September 30, 2018 and December 31, 2017, respectively 26,013 27,943 Unused credit card lines, all unsecured 25,096 24,949

Fair Value (Tables)

Fair Value (Tables)	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Summary of Estimated Fair Values of Financial Instruments	The following table presents estimated fair values of the Company’s financial instruments as of September 30, 2018 and December 31, 2017: September 30, 2018 December 31, 2017 Carrying Estimated Carrying Estimated (Dollars in thousands) Level Value Fair Value Value Fair Value Financial Assets: Cash and cash equivalents 1 $ 54,933 $ 54,933 $ 51,027 $ 51,027 Investment securities available-for-sale 2 255,021 255,021 263,056 263,056 Investment securities held-to-maturity 2 67,148 66,050 74,654 74,301 Non-marketable securities 2 4,231 4,231 3,706 3,706 Loans held for sale 2 8,467 8,467 10,871 10,871 Loans held for investment 3 1,695,094 1,692,440 1,609,141 1,607,388 Bank-owned life insurance 1 26,276 26,276 23,566 23,566 Financial Liabilities: Total deposits 2 $ 1,871,932 $ 1,580,894 $ 1,814,632 $ 1,596,966 Short-term borrowings 2 42,000 42,000 40,000 40,000
Summary of Asset Measured on Recurring and Non-recurring Basic at Fair Value	Assets measured on a recurring and non-recurring basis are as follows: (Dollars in thousands) Level 1 Level 2 Level 3 Total As of September 30, 2018 Fair valued on a recurring basis: Investment securities available-for-sale $ - $ 255,021 $ - $ 255,021 Fair valued on a non-recurring basis: Impaired loans - - 1,562 1,562 As of December 31, 2017 Fair valued on a recurring basis: Investment securities available-for-sale $ - $ 263,056 $ - $ 263,056 Fair valued on a non-recurring basis: Impaired loans - - 1,740 1,740

Basis of Presentation - Additio

Basis of Presentation - Additional Information (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018USD ($)BranchDivision	Sep. 30, 2017USD ($)
Basis Of Presentation [Line Items]
Revenue, Practical Expedient, Incremental Cost of Obtaining Contract [true false]	true
Balance without Adoption of ASC 606 | Topic 606
Basis Of Presentation [Line Items]
Card processing | $	$ 1,830	$ 1,588
People's Intermountain Bank
Basis Of Presentation [Line Items]
Number of retail branches | Branch	26
Number of banking divisions | Division	3

Basis of Presentation - Schedul

Basis of Presentation - Schedule of Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Numerator
Net income	$ 10,483	$ 6,238	$ 29,954	$ 19,253
Denominator
Weighted-average number of common shares outstanding	18,713,410	17,976,066	18,664,339	17,933,010
Incremental shares assumed for stock options and RSUs	297,190	420,598	315,066	422,126
Weighted-average number of dilutive shares outstanding	19,010,600	18,396,664	18,979,405	18,355,136
Basic earnings per common share	$ 0.56	$ 0.35	$ 1.60	$ 1.07
Diluted earnings per common share	$ 0.55	$ 0.34	$ 1.58	$ 1.05

Basis of Presentation - Impact

Basis of Presentation - Impact of Adopting New Revenue Standard on Statement of Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Non-interest income
Card processing	$ 826	$ 704	$ 2,347	$ 1,991
Service charges on deposit accounts	$ 737	$ 636	2,114	1,750
Balance without Adoption of ASC 606 | Topic 606
Non-interest income
Card processing			4,177	3,579
Service charges on deposit accounts			2,114	1,750
Non-interest expense
Card processing			1,830	1,588
Effect of Change | Topic 606
Non-interest income
Card processing			(1,830)	(1,588)
Non-interest expense
Card processing			$ (1,830)	$ (1,588)

Investment Securities - Summary

Investment Securities - Summary of Amortized Cost and Estimated Fair Value of Investment Securities Available for Sale (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Schedule Of Available For Sale Securities [Line Items]
Available-For-Sale, Amortized Cost	$ 262,773	$ 265,860
Available-For-Sale, Gross Unrealized Gains	87	841
Available-For-Sale, Gross Unrealized Losses, Less Than 12 Months	(3,105)	(1,173)
Available-For-Sale, Gross Unrealized Losses, 12 Months or Longer	(4,734)	(2,472)
Available-For-Sale, Fair Value	255,021	263,056
U.S. Government Sponsored Securities
Schedule Of Available For Sale Securities [Line Items]
Available-For-Sale, Amortized Cost	48,954	48,950
Available-For-Sale, Gross Unrealized Gains		13
Available-For-Sale, Gross Unrealized Losses, Less Than 12 Months	(418)	(6)
Available-For-Sale, Gross Unrealized Losses, 12 Months or Longer	(561)	(453)
Available-For-Sale, Fair Value	47,975	48,504
Mortgage-backed Securities
Schedule Of Available For Sale Securities [Line Items]
Available-For-Sale, Amortized Cost	197,478	198,100
Available-For-Sale, Gross Unrealized Gains	19	71
Available-For-Sale, Gross Unrealized Losses, Less Than 12 Months	(2,615)	(1,145)
Available-For-Sale, Gross Unrealized Losses, 12 Months or Longer	(3,914)	(1,764)
Available-For-Sale, Fair Value	190,968	195,262
Municipal Securities
Schedule Of Available For Sale Securities [Line Items]
Available-For-Sale, Amortized Cost	11,341	13,310
Available-For-Sale, Gross Unrealized Gains	68	184
Available-For-Sale, Gross Unrealized Losses, Less Than 12 Months	(66)	(22)
Available-For-Sale, Gross Unrealized Losses, 12 Months or Longer	(41)	(18)
Available-For-Sale, Fair Value	11,302	13,454
Corporate Securities
Schedule Of Available For Sale Securities [Line Items]
Available-For-Sale, Amortized Cost	5,000	5,500
Available-For-Sale, Gross Unrealized Gains		573
Available-For-Sale, Gross Unrealized Losses, Less Than 12 Months	(6)
Available-For-Sale, Gross Unrealized Losses, 12 Months or Longer	(218)	(237)
Available-For-Sale, Fair Value	$ 4,776	$ 5,836

Investment Securities - Summa_2

Investment Securities - Summary of Amortized Cost and Estimated Fair Value of Investment Securities Held-to-Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Schedule Of Held To Maturity Securities [Line Items]
Held-To-Maturity, Amortized Cost	$ 67,148	$ 74,654
Held-To-Maturity, Fair Value	66,050
Municipal Securities
Schedule Of Held To Maturity Securities [Line Items]
Held-To-Maturity, Amortized Cost	67,148	74,654
Held-To-Maturity, Gross Unrealized Gains	10	167
Held-To-Maturity, Gross Unrealized Losses, Less Than 12 Months	(656)	(293)
Held-To-Maturity, Gross Unrealized Losses, 12 Months or Longer	(452)	(227)
Held-To-Maturity, Fair Value	$ 66,050	$ 74,301

Investment Securities - Summa_3

Investment Securities - Summary of Gross Unrealized Losses and Fair Value for Securities Available-for-Sale and Held-to-Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Available-for-Sale and Held-to-Maturity Securities Continuous Unrealized Loss Position [Line Items]
Available-for-Sale, Less Than 12 Months, Fair Value	$ 110,902	$ 121,488
Available-for-Sale, 12 Months or More, Fair Value	136,947	111,995
Available-for-Sale, Fair Value, Total	247,849	233,483
Available-for-Sale, Less Than 12 Months, Unrealized Losses	(3,105)	(1,173)
Available-for-Sale, 12 Months or More, Unrealized Losses	(4,734)	(2,472)
Available-for-Sale, Unrealized Losses, Total	(7,839)	(3,645)
Municipal Securities
Available-for-Sale and Held-to-Maturity Securities Continuous Unrealized Loss Position [Line Items]
Available-for-Sale, Less Than 12 Months, Fair Value	4,319	3,523
Available-for-Sale, 12 Months or More, Fair Value	1,558	830
Available-for-Sale, Fair Value, Total	5,877	4,353
Available-for-Sale, Less Than 12 Months, Unrealized Losses	(66)	(22)
Available-for-Sale, 12 Months or More, Unrealized Losses	(41)	(18)
Available-for-Sale, Unrealized Losses, Total	(107)	(40)
Held-to Maturity, Less Than 12 Months, Fair Value	42,342	39,380
Held-to Maturity, 12 Months or More, Fair Value	16,359	10,389
Held-to Maturity, Fair Value, Total	58,701	49,769
Held-To-Maturity, Gross Unrealized Losses, Less Than 12 Months	(656)	(293)
Held-To-Maturity, Gross Unrealized Losses, 12 Months or Longer	(452)	(227)
Held-to Maturity, Unrealized Losses, Total	(1,108)	(520)
Corporate Securities
Available-for-Sale and Held-to-Maturity Securities Continuous Unrealized Loss Position [Line Items]
Available-for-Sale, Less Than 12 Months, Fair Value	1,994
Available-for-Sale, 12 Months or More, Fair Value	2,782	4,763
Available-for-Sale, Fair Value, Total	4,776	4,763
Available-for-Sale, Less Than 12 Months, Unrealized Losses	(6)
Available-for-Sale, 12 Months or More, Unrealized Losses	(218)	(237)
Available-for-Sale, Unrealized Losses, Total	(224)	(237)
U.S. Government Sponsored Securities
Available-for-Sale and Held-to-Maturity Securities Continuous Unrealized Loss Position [Line Items]
Available-for-Sale, Less Than 12 Months, Fair Value	14,537	5,087
Available-for-Sale, 12 Months or More, Fair Value	33,437	33,543
Available-for-Sale, Fair Value, Total	47,974	38,630
Available-for-Sale, Less Than 12 Months, Unrealized Losses	(418)	(6)
Available-for-Sale, 12 Months or More, Unrealized Losses	(561)	(453)
Available-for-Sale, Unrealized Losses, Total	(979)	(459)
Mortgage-backed Securities
Available-for-Sale and Held-to-Maturity Securities Continuous Unrealized Loss Position [Line Items]
Available-for-Sale, Less Than 12 Months, Fair Value	90,052	112,878
Available-for-Sale, 12 Months or More, Fair Value	99,170	72,859
Available-for-Sale, Fair Value, Total	189,222	185,737
Available-for-Sale, Less Than 12 Months, Unrealized Losses	(2,615)	(1,145)
Available-for-Sale, 12 Months or More, Unrealized Losses	(3,914)	(1,764)
Available-for-Sale, Unrealized Losses, Total	$ (6,529)	$ (2,909)

Investment Securities - Amortiz

Investment Securities - Amortized Cost and Estimated Fair Value of Investment Securities that are Available-for-Sale and Held-to-Maturity by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Available-For-Sale Securities by Maturity, Amortized Cost
Available-For-Sale, Securities maturing in one year or less, Amortized cost	$ 13,314
Available-For-Sale, Securities maturing in After one year through five years, Amortized cost	64,991
Available-For-Sale, Securities maturing in After five years through ten years, Amortized cost	49,367
Available-For-Sale, Securities maturing in After ten years, Amortized cost	135,101
Available-For-Sale, Amortized Cost	262,773	$ 265,860
Available-For-Sale Securities by Maturity, Fair Value
Available-For-Sale, Securities maturing in one year or less, Fair Value	13,181
Available-For-Sale, Securities maturing in After one year through five years, Fair Value	63,569
Available-For-Sale, Securities maturing in After five years through ten years, Fair Value	47,589
Available-For-Sale, Securities maturing in After ten years, Fair Value	130,682
Available-For-Sale, Fair Value	255,021	263,056
Held-To-Maturity Securities by Maturity, Amortized Cost
Held-To-Maturity, Securities maturing in one year or less, Amortized Cost	9,876
Held-To-Maturity, Securities maturing in After one year through five years, Amortized Cost	37,334
Held-To-Maturity, Securities maturing in After five years through ten years, Amortized Cost	14,859
Held-To-Maturity, Securities maturing in After ten years, Amortized Cost	5,079
Held-To-Maturity, Amortized Cost	67,148	$ 74,654
Held-To-Maturity Securities by Maturity, Fair Value
Held-To-Maturity, Securities maturing in one year or less, Fair Value	9,851
Held-To-Maturity, Securities maturing in After one year through five years, Fair Value	36,900
Held-To-Maturity, Securities maturing in After five years through ten years, Fair Value	14,360
Held-To-Maturity, Securities maturing in After ten years, Fair Value	4,939
Held-To-Maturity, Fair Value	$ 66,050

Investment Securities - Additio

Investment Securities - Additional Information (Details)	9 Months Ended
	Sep. 30, 2018USD ($)Securities	Sep. 30, 2017USD ($)	Dec. 31, 2017Securities
Investments Debt And Equity Securities [Abstract]
Number of investment securities with fair value less than amortized cost | Securities	336		304
Sales of available-for-sale securities	$ 500,000	$ 126,200,000
Net gain (loss) in sales of available-for-sale securities	$ 336,000	(486,000)
Available-for-sale securities in a nonaccrual status | Securities	0		0
Sales of held-to-maturity securities	$ 0	204,000
Net loss in sales of held-to-maturity securities		$ (13,000)
Held-to-maturity securities in a nonaccrual status | Securities	0		0

Loans and Allowance for Loan _3

Loans and Allowance for Loan Losses - Summary of Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Accounts Notes And Loans Receivable [Line Items]
Total gross loans	$ 1,722,899		$ 1,632,005
Net deferred loan fees	(4,496)		(4,561)
Total loans held for investment	1,718,403		1,627,444
Allowance for loan losses	(23,309)	$ (22,308)	(18,303)	$ (17,609)	$ (17,271)	$ (16,715)
Total loans held for investment, net	1,695,094		1,609,141
Real Estate Term
Accounts Notes And Loans Receivable [Line Items]
Total gross loans	856,247		784,148
Allowance for loan losses	(9,249)	(9,028)	(6,706)	(6,877)	(7,157)	(6,770)
Construction and Land Development
Accounts Notes And Loans Receivable [Line Items]
Total gross loans	382,254		369,590
Allowance for loan losses	(7,687)	(6,789)	(6,309)	(5,488)	(5,077)	(5,449)
Residential and Home Equity
Accounts Notes And Loans Receivable [Line Items]
Total gross loans	153,406		158,591
Allowance for loan losses	(675)	(659)	(815)	(466)	(503)	(617)
Consumer and Other
Accounts Notes And Loans Receivable [Line Items]
Total gross loans	16,597		25,591
Allowance for loan losses	(96)	(52)	(159)	(94)	(45)	(161)
Commercial Real Estate
Accounts Notes And Loans Receivable [Line Items]
Total gross loans	1,238,501		1,153,738
Allowance for loan losses	(16,936)		(13,015)
Commercial Real Estate | Real Estate Term
Accounts Notes And Loans Receivable [Line Items]
Total gross loans	856,247		784,148
Allowance for loan losses	(9,249)		(6,706)
Commercial Real Estate | Construction and Land Development
Accounts Notes And Loans Receivable [Line Items]
Total gross loans	382,254		369,590
Allowance for loan losses	(7,687)		(6,309)
Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Total gross loans	314,395		294,085
Allowance for loan losses	(5,602)	$ (5,780)	(4,314)	$ (4,684)	$ (4,489)	$ (3,718)
Consumer
Accounts Notes And Loans Receivable [Line Items]
Total gross loans	170,003		184,182
Allowance for loan losses	(771)		(974)
Consumer | Residential and Home Equity
Accounts Notes And Loans Receivable [Line Items]
Total gross loans	153,406		158,591
Allowance for loan losses	(675)		(815)
Consumer | Consumer and Other
Accounts Notes And Loans Receivable [Line Items]
Total gross loans	16,597		25,591
Allowance for loan losses	$ (96)		$ (159)

Loans and Allowance for Loan _4

Loans and Allowance for Loan Losses - Summary of Changes in Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	$ 22,308	$ 17,271	$ 18,303	$ 16,715
Provision for loan losses	1,925	900	5,450	2,000
Gross loan charge-offs	(1,344)	(667)	(1,806)	(1,740)
Recoveries	420	105	1,362	634
Net loan (charge-offs) / recoveries	(924)	(562)	(444)	(1,106)
Balance at end of period	23,309	17,609	23,309	17,609
Real Estate Term
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	9,028	7,157	6,706	6,770
Provision for loan losses	469	(303)	2,779	253
Gross loan charge-offs	(294)		(294)	(350)
Recoveries	46	23	58	204
Net loan (charge-offs) / recoveries	(248)	23	(236)	(146)
Balance at end of period	9,249	6,877	9,249	6,877
Construction and Land Development
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	6,789	5,077	6,309	5,449
Provision for loan losses	892	409	1,301	(42)
Recoveries	6	2	77	81
Net loan (charge-offs) / recoveries	6	2	77	81
Balance at end of period	7,687	5,488	7,687	5,488
Residential and Home Equity
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	659	503	815	617
Provision for loan losses	14	(44)	(223)	40
Gross loan charge-offs				(338)
Recoveries	2	7	83	147
Net loan (charge-offs) / recoveries	2	7	83	(191)
Balance at end of period	675	466	675	466
Consumer and Other
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	52	45	159	161
Provision for loan losses	95	68	71	13
Gross loan charge-offs	(105)	(46)	(277)	(159)
Recoveries	54	27	143	79
Net loan (charge-offs) / recoveries	(51)	(19)	(134)	(80)
Balance at end of period	96	94	96	94
Commercial and Industrial
Financing Receivable Allowance For Credit Losses [Line Items]
Balance at beginning of period	5,780	4,489	4,314	3,718
Provision for loan losses	455	770	1,522	1,736
Gross loan charge-offs	(945)	(621)	(1,235)	(893)
Recoveries	312	46	1,001	123
Net loan (charge-offs) / recoveries	(633)	(575)	(234)	(770)
Balance at end of period	$ 5,602	$ 4,684	$ 5,602	$ 4,684

Loans and Allowance for Loan _5

Loans and Allowance for Loan Losses - Summary of Non Accrual Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financing Receivable Allowance For Credit Losses [Line Items]
Non-accrual loans, not troubled debt restructured	$ 1,868	$ 223
Troubled debt restructured loans, non-accrual	1,664
Total non-accrual loans	3,532	223
Real Estate Term
Financing Receivable Allowance For Credit Losses [Line Items]
Non-accrual loans, not troubled debt restructured	310
Troubled debt restructured loans, non-accrual	1,495
Construction and Land Development
Financing Receivable Allowance For Credit Losses [Line Items]
Non-accrual loans, not troubled debt restructured	98
Commercial and Industrial Loans
Financing Receivable Allowance For Credit Losses [Line Items]
Non-accrual loans, not troubled debt restructured	1,455	$ 223
Troubled debt restructured loans, non-accrual	169
Consumer and Other
Financing Receivable Allowance For Credit Losses [Line Items]
Non-accrual loans, not troubled debt restructured	$ 5

Loans and Allowance for Loan _6

Loans and Allowance for Loan Losses - Summary of Troubled Debt Restructured Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Loans And Leases Receivable Disclosure [Abstract]
Accruing troubled debt restructured loans	$ 2,423	$ 3,307
Non-accrual troubled debt restructured loans	1,664
Total troubled debt restructured loans	$ 4,087	$ 3,307

Loans and Allowance for Loan _7

Loans and Allowance for Loan Losses - Additional Information (Details) - USD ($)	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Related Party Transaction [Line Items]
TDRs Loans	$ 4,100,000
New TDRs loans occurred during the period	$ 0
Troubled debt restructuring payment default period	12 months
TDRs payment default	$ 0	$ 0
Outstanding contractual unpaid principal balance, excluding acquisition accounting adjustments	9,200,000		$ 12,400,000
Carrying balance of PCI loans	6,200,000		8,700,000
Non-accretable difference between the contractually required payments and cash flows expected to be collected	3,000,000		3,700,000
Available lines of credit for loans and credit cards to affiliates	1,300,000		330,000
Deposits from affiliates	8,800,000		7,100,000
Affiliates
Related Party Transaction [Line Items]
Outstanding loans with affiliates	$ 4,300,000		$ 3,400,000

Loans and Allowance for Loan _8

Loans and Allowance for Loan Losses - Summary of Current and Past Due Loans Held For Investment (Accruing And Non-Accruing) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financing Receivable Recorded Investment Past Due [Line Items]
Current	$ 1,707,146	$ 1,607,064
30-89 Days Past Due	6,011	16,043
90+ Days Past Due	17	1
Non-accrual	3,532	223
Total Past-Due	9,560	16,267
Purchased Credit Impaired	6,193	8,674
Total loans	1,722,899	1,632,005
Real Estate Term
Financing Receivable Recorded Investment Past Due [Line Items]
Purchased Credit Impaired	3,308	4,159
Total loans	856,247	784,148
Construction and Land Development
Financing Receivable Recorded Investment Past Due [Line Items]
Purchased Credit Impaired	333	648
Total loans	382,254	369,590
Residential and Home Equity
Financing Receivable Recorded Investment Past Due [Line Items]
Total loans	153,406	158,591
Consumer and Other
Financing Receivable Recorded Investment Past Due [Line Items]
Total loans	16,597	25,591
Commercial Real Estate
Financing Receivable Recorded Investment Past Due [Line Items]
Current	1,230,400	1,139,593
30-89 Days Past Due	2,557	9,338
Non-accrual	1,903
Total Past-Due	4,460	9,338
Purchased Credit Impaired	3,641	4,807
Total loans	1,238,501	1,153,738
Commercial Real Estate | Real Estate Term
Financing Receivable Recorded Investment Past Due [Line Items]
Current	850,094	777,746
30-89 Days Past Due	1,040	2,243
Non-accrual	1,805
Total Past-Due	2,845	2,243
Purchased Credit Impaired	3,308	4,159
Total loans	856,247	784,148
Commercial Real Estate | Construction and Land Development
Financing Receivable Recorded Investment Past Due [Line Items]
Current	380,306	361,847
30-89 Days Past Due	1,517	7,095
Non-accrual	98
Total Past-Due	1,615	7,095
Purchased Credit Impaired	333	648
Total loans	382,254	369,590
Commercial and Industrial
Financing Receivable Recorded Investment Past Due [Line Items]
Current	307,873	285,785
30-89 Days Past Due	2,346	4,210
Non-accrual	1,624	223
Total Past-Due	3,970	4,433
Purchased Credit Impaired	2,552	3,867
Total loans	314,395	294,085
Consumer
Financing Receivable Recorded Investment Past Due [Line Items]
Current	168,873	181,686
30-89 Days Past Due	1,108	2,495
90+ Days Past Due	17	1
Non-accrual	5
Total Past-Due	1,130	2,496
Total loans	170,003	184,182
Consumer | Residential and Home Equity
Financing Receivable Recorded Investment Past Due [Line Items]
Current	152,518	156,379
30-89 Days Past Due	888	2,212
Total Past-Due	888	2,212
Total loans	153,406	158,591
Consumer | Consumer and Other
Financing Receivable Recorded Investment Past Due [Line Items]
Current	16,355	25,307
30-89 Days Past Due	220	283
90+ Days Past Due	17	1
Non-accrual	5
Total Past-Due	242	284
Total loans	$ 16,597	$ 25,591

Loans and Allowance for Loan _9

Loans and Allowance for Loan Losses - Summary of Outstanding Loan Balances (Accruing and Non - Accruing) Categorized by Credit Quality Indicators (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	$ 1,722,899		$ 1,632,005
Total Allowance	23,309	$ 22,308	18,303	$ 17,609	$ 17,271	$ 16,715
Real Estate Term
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	856,247		784,148
Total Allowance	9,249	9,028	6,706	6,877	7,157	6,770
Construction and Land Development
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	382,254		369,590
Total Allowance	7,687	6,789	6,309	5,488	5,077	5,449
Residential and Home Equity
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	153,406		158,591
Total Allowance	675	659	815	466	503	617
Consumer and Other
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	16,597		25,591
Total Allowance	96	52	159	94	45	161
Commercial Real Estate
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	1,238,501		1,153,738
Total Allowance	16,936		13,015
Commercial Real Estate | Real Estate Term
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	856,247		784,148
Total Allowance	9,249		6,706
Commercial Real Estate | Construction and Land Development
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	382,254		369,590
Total Allowance	7,687		6,309
Commercial and Industrial
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	314,395		294,085
Total Allowance	5,602	$ 5,780	4,314	$ 4,684	$ 4,489	$ 3,718
Consumer
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	170,003		184,182
Total Allowance	771		974
Consumer | Residential and Home Equity
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	153,406		158,591
Total Allowance	675		815
Consumer | Consumer and Other
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	16,597		25,591
Total Allowance	96		159
Pass
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	1,667,288		1,570,090
Pass | Commercial Real Estate
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	1,206,192		1,117,341
Pass | Commercial Real Estate | Real Estate Term
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	827,297		758,575
Pass | Commercial Real Estate | Construction and Land Development
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	378,895		358,766
Pass | Commercial and Industrial
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	295,243		274,535
Pass | Consumer
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	165,853		178,214
Pass | Consumer | Residential and Home Equity
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	149,310		152,753
Pass | Consumer | Consumer and Other
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	16,543		25,461
Special Mention
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	27,406		37,704
Special Mention | Commercial Real Estate
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	19,492		20,282
Special Mention | Commercial Real Estate | Real Estate Term
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	17,896		13,055
Special Mention | Commercial Real Estate | Construction and Land Development
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	1,596		7,227
Special Mention | Commercial and Industrial
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	6,186		13,464
Special Mention | Consumer
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	1,728		3,958
Special Mention | Consumer | Residential and Home Equity
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	1,701		3,913
Special Mention | Consumer | Consumer and Other
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	27		45
Substandard
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	28,205		24,198
Substandard | Commercial Real Estate
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	12,817		16,115
Substandard | Commercial Real Estate | Real Estate Term
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	11,054		12,518
Substandard | Commercial Real Estate | Construction and Land Development
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	1,763		3,597
Substandard | Commercial and Industrial
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	12,966		6,086
Substandard | Consumer
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	2,422		1,997
Substandard | Consumer | Residential and Home Equity
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	2,395		1,925
Substandard | Consumer | Consumer and Other
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans	$ 27		72
Doubtful
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans			13
Doubtful | Consumer
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans			13
Doubtful | Consumer | Consumer and Other
Financing Receivable Allowance For Credit Losses [Line Items]
Total Loans			$ 13

Loans and Allowance for Loan_10

Loans and Allowance for Loan Losses - Summary of ALLL And Outstanding Loan Balances According To The Company's Impairment Method (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, Individually evaluated for impairment	$ 279		$ 145
Allowance for loan losses, Collectively evaluated for impairment	23,030		18,158
Allowance for loan losses, Total	23,309	$ 22,308	18,303	$ 17,609	$ 17,271	$ 16,715
Outstanding loan balances, Individually evaluated for impairment	19,472		11,953
Outstanding loan balances, Collectively evaluated for impairment	1,697,234		1,611,378
Outstanding loan balances, Purchased credit-impaired loans	6,193		8,674
Total loans	1,722,899		1,632,005
Real Estate Term
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, Collectively evaluated for impairment	9,249		6,706
Allowance for loan losses, Total	9,249	9,028	6,706	6,877	7,157	6,770
Outstanding loan balances, Individually evaluated for impairment	4,355		6,191
Outstanding loan balances, Collectively evaluated for impairment	848,584		773,798
Outstanding loan balances, Purchased credit-impaired loans	3,308		4,159
Total loans	856,247		784,148
Construction and Land Development
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, Individually evaluated for impairment			3
Allowance for loan losses, Collectively evaluated for impairment	7,687		6,306
Allowance for loan losses, Total	7,687	6,789	6,309	5,488	5,077	5,449
Outstanding loan balances, Individually evaluated for impairment	1,441		2,568
Outstanding loan balances, Collectively evaluated for impairment	380,480		366,374
Outstanding loan balances, Purchased credit-impaired loans	333		648
Total loans	382,254		369,590
Residential and Home Equity
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, Individually evaluated for impairment			101
Allowance for loan losses, Collectively evaluated for impairment	675		714
Allowance for loan losses, Total	675	659	815	466	503	617
Outstanding loan balances, Individually evaluated for impairment	2,112		1,150
Outstanding loan balances, Collectively evaluated for impairment	151,294		157,441
Total loans	153,406		158,591
Consumer and Other
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, Collectively evaluated for impairment	96		159
Allowance for loan losses, Total	96	52	159	94	45	161
Outstanding loan balances, Collectively evaluated for impairment	16,597		25,591
Total loans	16,597		25,591
Commercial and Industrial
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses, Individually evaluated for impairment	279		41
Allowance for loan losses, Collectively evaluated for impairment	5,323		4,273
Allowance for loan losses, Total	5,602	$ 5,780	4,314	$ 4,684	$ 4,489	$ 3,718
Outstanding loan balances, Individually evaluated for impairment	11,564		2,044
Outstanding loan balances, Collectively evaluated for impairment	300,279		288,174
Outstanding loan balances, Purchased credit-impaired loans	2,552		3,867
Total loans	$ 314,395		$ 294,085

Loans and Allowance for Loan_11

Loans and Allowance for Loan Losses - Summary of Information On Impaired Loans, Excluding Purchased Credit Impaired ("PCI") Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financing Receivable Impaired [Line Items]
Unpaid Principal Balance	$ 26,436	$ 17,929
Recorded investment With No Allowance	17,631	10,068
Recorded investment With Allowance	1,841	1,885
Total Recorded Investment	19,472	11,953
Related Allowance	279	145
Commercial Real Estate
Financing Receivable Impaired [Line Items]
Unpaid Principal Balance	9,801	10,575
Recorded investment With No Allowance	5,796	8,563
Recorded investment With Allowance		196
Total Recorded Investment	5,796	8,759
Related Allowance		3
Commercial Real Estate | Real Estate Term
Financing Receivable Impaired [Line Items]
Unpaid Principal Balance	7,607	7,090
Recorded investment With No Allowance	4,355	6,191
Total Recorded Investment	4,355	6,191
Commercial Real Estate | Construction and Land Development
Financing Receivable Impaired [Line Items]
Unpaid Principal Balance	2,194	3,485
Recorded investment With No Allowance	1,441	2,372
Recorded investment With Allowance		196
Total Recorded Investment	1,441	2,568
Related Allowance		3
Commercial and Industrial
Financing Receivable Impaired [Line Items]
Unpaid Principal Balance	14,523	6,204
Recorded investment With No Allowance	9,723	1,276
Recorded investment With Allowance	1,841	768
Total Recorded Investment	11,564	2,044
Related Allowance	279	41
Consumer
Financing Receivable Impaired [Line Items]
Unpaid Principal Balance	2,112	1,150
Recorded investment With No Allowance	2,112	229
Recorded investment With Allowance		921
Total Recorded Investment	2,112	1,150
Related Allowance		101
Consumer | Residential and Home Equity
Financing Receivable Impaired [Line Items]
Unpaid Principal Balance	2,112	1,150
Recorded investment With No Allowance	2,112	229
Recorded investment With Allowance		921
Total Recorded Investment	$ 2,112	1,150
Related Allowance		$ 101

Loans and Allowance for Loan_12

Loans and Allowance for Loan Losses - Summary of Interest Income Recognized on Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Financing Receivable Impaired [Line Items]
Average Recorded Investment	$ 23,947	$ 14,239	$ 19,455	$ 13,680
Interest Income Recognition	300	302	691	407
Commercial Real Estate
Financing Receivable Impaired [Line Items]
Average Recorded Investment	11,170	8,528	10,082	8,162
Interest Income Recognition	127	173	347	222
Commercial Real Estate | Real Estate Term
Financing Receivable Impaired [Line Items]
Average Recorded Investment	10,127	6,648	8,366	5,765
Interest Income Recognition	111	100	257	118
Commercial Real Estate | Construction and Land Development
Financing Receivable Impaired [Line Items]
Average Recorded Investment	1,043	1,880	1,716	2,397
Interest Income Recognition	16	73	90	104
Commercial and Industrial
Financing Receivable Impaired [Line Items]
Average Recorded Investment	10,049	4,659	7,198	4,464
Interest Income Recognition	140	103	268	148
Consumer
Financing Receivable Impaired [Line Items]
Average Recorded Investment	2,728	1,052	2,175	1,054
Interest Income Recognition	33	26	76	37
Consumer | Residential and Home Equity
Financing Receivable Impaired [Line Items]
Average Recorded Investment	2,728	1,052	2,175	1,054
Interest Income Recognition	$ 33	$ 26	$ 76	$ 37

Loans and Allowance for Loan_13

Loans and Allowance for Loan Losses - Changes in Accretable Yield for PCI Loans (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance, beginning of period	$ 8,536	$ 573
Accretion to interest income	(2,165)	(38)
Reclassification from non-accretable difference	189	9
Balance, end of period	$ 6,560	$ 544

Commitments and Contingencies -

Commitments and Contingencies - Summary of Contractual Amounts of Off-balance Sheet Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Commitments to Extend Credit
Commitments And Contingencies [Line Items]
Off-balance sheet financial instrument, contractual amount	$ 582,174	$ 637,029
Stand-by Letters of Credit and Bond Commitments
Commitments And Contingencies [Line Items]
Off-balance sheet financial instrument, contractual amount	26,013	27,943
Unused Credit Card Lines, All Unsecured
Commitments And Contingencies [Line Items]
Off-balance sheet financial instrument, contractual amount	$ 25,096	$ 24,949

Commitments and Contingencies_2

Commitments and Contingencies - Summary of Contractual Amounts of Off-balance Sheet Financial Instruments (Parenthetical) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Unsecured Commitments Included in Commitments to Extend Credit
Commitments And Contingencies [Line Items]
Off-balance sheet financial instrument, contractual amount	$ 17,912	$ 13,625
Unsecured Commitments Included in Stand-by Letters of Credit and Bond Commitments
Commitments And Contingencies [Line Items]
Off-balance sheet financial instrument, contractual amount	$ 474	$ 440

Fair Value - Summary of Estimat

Fair Value - Summary of Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financial Assets:
Investment securities available-for-sale	$ 255,021	$ 263,056
Investment securities held-to-maturity	66,050
Carrying Value | Level 1
Financial Assets:
Cash and cash equivalents	54,933	51,027
Bank-owned life insurance	26,276	23,566
Carrying Value | Level 2
Financial Assets:
Investment securities available-for-sale	255,021	263,056
Investment securities held-to-maturity	67,148	74,654
Non-marketable securities	4,231	3,706
Loans held for sale	8,467	10,871
Financial Liabilities:
Total deposits	1,871,932	1,814,632
Short-term borrowings	42,000	40,000
Carrying Value | Level 3
Financial Assets:
Loans held for investment	1,695,094	1,609,141
Estimated Fair Value | Level 1
Financial Assets:
Cash and cash equivalents	54,933	51,027
Bank-owned life insurance	26,276	23,566
Estimated Fair Value | Level 2
Financial Assets:
Investment securities available-for-sale	255,021	263,056
Investment securities held-to-maturity	66,050	74,301
Non-marketable securities	4,231	3,706
Loans held for sale	8,467	10,871
Financial Liabilities:
Total deposits	1,580,894	1,596,966
Short-term borrowings	42,000	40,000
Estimated Fair Value | Level 3
Financial Assets:
Loans held for investment	$ 1,692,440	$ 1,607,388

Fair Value - Summary of Asset M

Fair Value - Summary of Asset Measured at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities available-for-sale	$ 255,021	$ 263,056
Fair Valued on a Recurring Basis
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities available-for-sale	255,021	263,056
Fair Valued on a Non-Recurring Basis
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Impaired loans	1,562	1,740
Level 2 | Fair Valued on a Recurring Basis
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Investment securities available-for-sale	255,021	263,056
Level 3 | Fair Valued on a Non-Recurring Basis
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Impaired loans	$ 1,562	$ 1,740

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Taxes [Line Items]
Income tax expense	$ 3,288	$ 2,697	$ 9,127	$ 9,021
Effective tax rate	23.90%	30.20%
Federal statutory rate	21.00%
Utah
Income Taxes [Line Items]
State corporation tax rate	4.95%

Regulatory Capital Matters - Ad

Regulatory Capital Matters - Additional Information (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Banking And Thrift [Abstract]
Consolidated Tier 1 Leverage ratio	11.90%	11.46%
Minimum reserve balances on average deposits	$ 16.3	$ 19

Incentive Share-Based Plan an_2

Incentive Share-Based Plan and Other Employee Benefits - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended	9 Months Ended
	Jun. 30, 2014	Sep. 30, 2018	Sep. 30, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options issued to purchase common shares		33,382
Exercise price of common shares		$ 32.31
Fair value as of date of grant per share		$ 3.58
Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation expense		$ 683	$ 382
Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock units granted		32,128
Fair value of restricted stock units		$ 31.03
Share-Based Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Maximum number of shares available for issuance under the plan	800,000
Maximum | Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period		3 years
Maximum | Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period		3 years
Maximum | Share-Based Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based awards granted term	10 years
Minimum [Member] | Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period		1 year
Minimum [Member] | Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period		1 year

Acquisition Related Measureme_2

Acquisition Related Measurement Period Adjustments - Additional Information (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018USD ($)
Business Combinations [Abstract]
Acquisition related measurement period adjustments to goodwill	$ 335